Help Center & FAQs

BUKNUWO is committed to providing users with more stable, safer, and longer-lasting LiFePO4 battery solutions. Our batteries are designed for a wide range of applications, including RVs, boats, camping, solar energy storage, off-grid systems, and home backup power.

BUKNUWO is more than just a battery brand. It represents reliable power support for everyday life, outdoor adventures, and emergency backup needs. Our goal is to help users enjoy a safer, more efficient, and more dependable power experience wherever they go.

BUKNUWO LiFePO4 batteries use lithium iron phosphate cells, which offer better thermal stability and safety compared with traditional lead-acid batteries. Each battery is equipped with an intelligent BMS battery management system to help monitor and protect the battery during operation.

Key safety advantages of BUKNUWO batteries include:

Smart BMS Protection System The built-in BMS helps protect the battery against overcharge, over-discharge, over-current, short circuit, and temperature-related risks, ensuring stable performance in different environments.

Stable LiFePO4 Chemistry Lithium iron phosphate batteries offer excellent thermal stability and are less likely to experience thermal runaway, making them suitable for long-term energy storage and outdoor use.

No Acid Leakage Risk Unlike lead-acid batteries, LiFePO4 batteries do not contain liquid acid, reducing the risk of leakage, corrosion, and maintenance-related issues.

Lower Maintenance Requirements BUKNUWO LiFePO4 batteries do not require regular water refilling or complex maintenance, making daily use easier and more convenient.

Suitable for Multiple Applications BUKNUWO batteries can be used for RVs, boats, camping, solar systems, off-grid power, and backup energy applications.

BUKNUWO LiFePO4 batteries usually have a higher initial purchase cost than traditional lead-acid batteries. However, from a long-term use perspective, they offer greater overall value.

The main reasons include:

Longer Service Life Under proper use conditions, BUKNUWO LiFePO4 batteries can support thousands of deep cycles, offering a much longer lifespan than standard lead-acid batteries.

Higher Usable Capacity LiFePO4 batteries support a deeper depth of discharge, allowing users to make better use of the available battery capacity.

Lighter Weight and Higher Energy Density Compared with lead-acid batteries of similar capacity, LiFePO4 batteries are usually lighter and more energy-dense, making them ideal for RVs, boats, and portable power applications.

Lower Maintenance Cost BUKNUWO batteries require less maintenance and do not need to be replaced as frequently as lead-acid batteries, helping reduce long-term ownership costs.

More Stable Power Output BUKNUWO batteries provide stable voltage output over a longer period, helping power devices more reliably.

Although the initial investment may be higher, BUKNUWO LiFePO4 batteries are a more cost-effective long-term energy solution when considering lifespan, performance, safety, and maintenance costs.

BUKNUWO LiFePO4 batteries are suitable for a wide range of energy storage and outdoor power applications, including RV power systems, marine power, camping equipment, solar energy storage systems, off-grid power systems, home backup power, fishing boats, outdoor lighting, emergency power, and other 12V / 24V power applications.

Whether you are going on a short camping trip or building a long-term off-grid power system, BUKNUWO provides reliable and stable power support.

BUKNUWO LiFePO4 batteries require much less maintenance than traditional lead-acid batteries. Under normal use conditions, they do not require water refilling, acid maintenance, or frequent electrolyte checks.

To help extend battery life, we recommend the following:

Avoid long-term over-discharge. Use a charger compatible with LiFePO4 batteries. Store the battery in a dry and well-ventilated environment when not in use for a long time. Check the battery terminals regularly to make sure they are not loose or oxidized.

Yes. BUKNUWO LiFePO4 batteries are suitable for use with solar charge controllers, inverters, and solar panels. They can be used in RV solar systems, off-grid energy storage systems, and home backup power systems.

For better performance, we recommend using an MPPT or PWM solar charge controller that supports LiFePO4 battery settings. Please set the proper charging voltage and charging current according to the battery specifications.

Yes. BUKNUWO is committed to providing reliable customer support. If you have any questions about installation, usage, charging, connection, or after-sales service, you can contact us through our website.

Our goal is to help every customer use BUKNUWO batteries safely, correctly, and efficiently while enjoying a better power experience.

BUKNUWO focuses on providing stable and reliable LiFePO4 lithium iron phosphate battery solutions for RVs, boats, camping, solar energy storage, off-grid systems, and home backup power.

Compared with traditional lead-acid batteries, BUKNUWO LiFePO4 batteries offer a longer cycle life, lighter weight, higher usable capacity, and lower maintenance requirements. Compared with other types of lithium batteries, LiFePO4 chemistry provides better thermal stability and safety, making it more suitable for long-term energy storage and outdoor power applications.

BUKNUWO batteries are equipped with an intelligent BMS battery management system, which helps protect against overcharge, over-discharge, over-current, short circuit, and temperature-related risks, ensuring stable performance in different operating environments.

BUKNUWO values product safety, transportation compliance, and quality control. Depending on the specific model, some of our battery products may provide relevant certifications or test documents, such as UN38.3, MSDS, CE, RoHS, FCC, and other applicable compliance documents.

Certification information may vary by product model. Please refer to the product detail page, product packaging, user manual, or information provided by our official customer support team. If you need certification documents for platform review, customs clearance, transportation, or project purchasing, please contact us through our website for assistance.

BUKNUWO LiFePO4 battery housings provide a certain level of protection against dust and splashes, making them suitable for common applications such as RVs, boats, camping, and outdoor energy storage.

However, the batteries should not be exposed to rain for long periods or submerged in water. To ensure safety and extend battery life, please install the battery in a dry, well-ventilated location and avoid areas where water may accumulate.

If you plan to use the battery in marine applications, outdoor battery boxes, or solar power systems, we recommend installing it inside a waterproof battery box or a protected enclosure.

Choosing the right battery capacity depends on your device power, usage time, and application scenario.

You can consider the following factors:

1. Device Power First, check the power rating of the devices you need to run, such as lights, refrigerators, water pumps, inverters, camping equipment, or marine devices.

2. Usage Time Estimate how many hours per day the devices will be used. The higher the power consumption and the longer the usage time, the larger the battery capacity you may need.

3. System Voltage Common systems include 12V, 24V, 36V, and 48V. Please choose a battery that matches the voltage requirements of your device or power system.

4. Installation Space Make sure your battery compartment, battery box, or installation location has enough space for the battery size you choose.

5. Future Expansion Needs If you plan to add more devices or extend your operating time in the future, you may choose a higher-capacity battery or a model that supports series and parallel expansion.

If you are not sure which battery to choose, please contact our customer support team and provide your device power, expected usage time, and application scenario. We will help you find a suitable battery solution.

You can find the battery dimensions, weight, capacity, voltage, terminal type, and recommended charging parameters in the specification table on each product detail page.

Most product pages include the length, width, height, and weight of the battery. Before purchasing, please make sure your installation space is large enough, especially for RV battery compartments, marine battery compartments, solar storage boxes, or portable power setups.

If you need additional size information, you can also contact our customer support team through our website.

To determine whether your device is compatible, please check the following points:

1. Voltage Compatibility Make sure the battery voltage matches your device or system voltage. For example, a 12V device should be used with a 12V LiFePO4 battery, while a 24V system should use a 24V battery or a properly connected battery bank.

2. Power Compatibility Make sure your device power does not exceed the battery’s maximum continuous discharge current or maximum load power supported by the BMS.

3. Charging Equipment Compatibility We recommend using a charger, solar charge controller, or inverter charger that supports LiFePO4 battery charging settings.

4. Correct Connection Method If you need to connect batteries in series or parallel, please follow the product manual carefully. Use batteries of the same model, same capacity, same voltage, and similar state of charge.

5. Suitable Operating Environment Please make sure the operating temperature, installation location, dust and water protection, and ventilation conditions meet the battery requirements.

If you are not sure whether your device is compatible, please contact us and provide your device voltage, power, expected usage time, and connection method. We will help you check compatibility.

You can find the main specifications on the BUKNUWO product detail page, including rated voltage, capacity, energy, BMS current, maximum load power, recommended charging current, standard charging voltage, operating temperature, dimensions, and weight.

If you need a user manual, installation guide, or certification document, please check the download section on the product page or contact our customer support team through our website.

DOD stands for Depth of Discharge.

In simple terms, DOD refers to how much of the battery capacity has been used. For example, if a battery has a DOD of 50%, it means that half of the battery’s capacity has been discharged.

Compared with traditional lead-acid batteries, LiFePO4 batteries usually support a higher depth of discharge, allowing users to make better use of the available battery capacity. Managing the depth of discharge properly can help extend battery life and maintain stable performance.

BUKNUWO LiFePO4 batteries are equipped with low-temperature protection. When the ambient temperature is too low, the BMS may limit or stop charging to help protect the battery cells and prevent damage caused by charging in low-temperature conditions.

Please note that low-temperature protection features may vary by model. Always refer to the specific product page or user manual for accurate information. If you often use batteries in cold regions, winter outdoor environments, or low-temperature conditions, we recommend choosing a model with low-temperature protection.

With proper use and maintenance, BUKNUWO LiFePO4 batteries can typically provide thousands to tens of thousands of deep cycles, offering a much longer service life than traditional lead-acid batteries.

Actual battery life may be affected by depth of discharge, charging method, ambient temperature, load power, storage conditions, and usage frequency. To help extend battery life, we recommend using a charger compatible with LiFePO4 batteries, avoiding long-term over-discharge, and storing the battery in a dry, well-ventilated environment with a suitable temperature.

You can use a multimeter to measure the voltage at the battery terminals. If your battery supports Bluetooth, you can also check voltage, current, and SOC status through the battery app.

Please note that voltage can only provide a rough indication of battery status and cannot always accurately represent the remaining capacity. LiFePO4 batteries have a relatively stable voltage curve, so we recommend estimating remaining capacity by considering SOC, current, usage time, and load power together.

If your battery supports a Bluetooth app, we recommend using the app to check real-time battery status.

In general, we do not recommend using a BUKNUWO LiFePO4 deep-cycle battery as a starting battery for cars, motorcycles, or marine engines.

BUKNUWO LiFePO4 batteries are mainly designed for energy storage and deep-cycle applications, such as RV power systems, marine house power, camping equipment, solar systems, off-grid energy storage, and backup power.

Starting batteries are designed to deliver very high instant current for engine starting, while deep-cycle batteries are designed to provide stable and continuous power. For safety and stable performance, please do not use a standard deep-cycle LiFePO4 battery for engine starting unless the product page clearly states that the battery supports starting applications.

Yes. BUKNUWO LiFePO4 batteries have recommended temperature ranges for charging, discharging, and storage.

General recommendations are as follows:

Charging Temperature: Charge the battery within the recommended temperature range and avoid charging in extremely low-temperature conditions.

Discharging Temperature: LiFePO4 batteries can usually discharge within a wider temperature range, but extreme high or low temperatures may affect performance.

Storage Temperature: When the battery is not in use for a long time, store it in a dry, well-ventilated place away from direct sunlight.

Specific temperature parameters may vary by product model. Please refer to the product detail page or user manual for accurate information. To protect battery life and safety, avoid placing the battery in high-temperature, humid, waterlogged, or poorly ventilated environments for long periods.

Yes. We recommend fully charging the battery before first use.

BUKNUWO LiFePO4 batteries are usually not shipped at 100% state of charge. The battery may arrive with a partial charge due to factory settings and transportation requirements. For a better first-use experience and more accurate battery status display, please fully charge the battery with a charger that supports LiFePO4 batteries before using it for the first time.

If your battery supports Bluetooth app monitoring, fully charging it before first use can also help the app display SOC status more accurately.

BUKNUWO LiFePO4 batteries can be charged in several ways, including with a dedicated LiFePO4 battery charger, solar charging system, generator, or vehicle charging system.

1. Use a dedicated LiFePO4 battery charger This is the most recommended and easiest charging method. Please choose a charger that supports LiFePO4 battery charging mode, and set the proper charging voltage and charging current according to the battery specifications.

For BUKNUWO 12.8V LiFePO4 batteries, the common standard charging voltage is 14.6V ± 0.1V. Please refer to the product detail page or user manual for the recommended charging current.

2. Use a solar charging system BUKNUWO batteries can be used with solar panels and a solar charge controller. We recommend choosing an MPPT or PWM controller that supports LiFePO4 battery charging settings.

MPPT controllers offer higher charging efficiency and are better suited for RVs, boats, off-grid systems, and medium to large solar energy storage systems. PWM controllers have a simpler structure and are suitable for smaller solar charging setups.

When charging with solar power, please set the correct charging voltage and current according to the battery specifications. Avoid using a controller that only supports lead-acid battery charging modes.

3. Use a generator or vehicle charging system If you charge the battery with a generator, vehicle alternator, or onboard charging system, we recommend using a suitable DC-DC charger or charging device that supports LiFePO4 batteries.

Do not connect the battery directly to an incompatible charging device, as unstable charging voltage or current may affect battery life or trigger BMS protection.

The recommended charging parameters may vary depending on the voltage and capacity of each BUKNUWO LiFePO4 battery. Please always refer to the product detail page, product label, or user manual for the exact specifications.

In general:

12.8V LiFePO4 Batteries We recommend using a 14.6V charger that supports LiFePO4 charging mode. The common standard charging voltage is 14.6V ± 0.1V.

25.6V LiFePO4 Batteries We recommend using a 29.2V charger that supports LiFePO4 charging mode. Please refer to the product specifications for exact charging parameters.

Recommended Charging Current Choose a suitable charging current according to the battery capacity and product specifications. For example, a 12V 100Ah battery should be charged with a LiFePO4 charger that matches the product requirements. A lower charging current is gentler and may help protect battery life, while a higher charging current charges faster. However, the charging current must not exceed the maximum charging current specified by the battery BMS and user manual.

Battery runtime depends on battery capacity, device power consumption, inverter efficiency, operating environment, and depth of discharge.

You can use the following formula for a simple estimate:

Runtime ≈ Battery Energy (Wh) × Usable Efficiency ÷ Device Power (W)

For example, a 12.8V 100Ah LiFePO4 battery has approximately:

12.8V × 100Ah = 1280Wh

If it powers a 60W device under ideal DC conditions:

1280Wh ÷ 60W ≈ 21.3 hours

If the battery powers AC devices through an inverter, the actual runtime may be lower due to inverter loss. In many cases, an efficiency of about 85%–90% can be used for estimation.

Actual runtime may vary depending on device power, inverter efficiency, battery condition, and operating environment. The calculation above is for reference only.

Slight warming during charging is normal. During the charging process, current flows through the battery cells and internal components, which may generate some heat. As a result, the battery case may become slightly warm.

However, if the battery becomes very hot, produces an unusual smell, becomes deformed, makes abnormal noises, or if the charger overheats, please stop charging immediately and check the following:

Whether the charger supports LiFePO4 batteries; Whether the charging voltage and current match the battery specifications; Whether the terminals or cable connections are loose; Whether the operating environment is too hot or poorly ventilated; Whether the battery is in an abnormal condition.

If you cannot identify the issue, please stop using the battery and contact the BUKNUWO customer support team.

When using a proper LiFePO4 charger and when both the battery and charger are in normal condition, occasional overnight charging usually will not damage the battery.

BUKNUWO LiFePO4 batteries are equipped with a BMS battery management system, which helps provide protection against overcharge, over-discharge, over-current, short circuit, and temperature-related risks. When the battery reaches the protection conditions, the BMS will take protective action.

However, to better extend battery life, we still recommend disconnecting the charger after the battery is fully charged and avoiding unnecessary long-term connection to charging equipment. Do not use an incompatible, unprotected, or low-quality charger to charge the battery for extended periods.

In most cases, BUKNUWO battery packages do not include a charger. You will need to purchase a suitable LiFePO4 battery charger separately according to your battery model and application.

When choosing a charger, please consider the following points:

1. Voltage Compatibility Make sure the charger voltage matches the battery voltage. For example, a 12.8V LiFePO4 battery should be charged with a charger designed for 12V LiFePO4 batteries.

2. LiFePO4 Charging Mode Choose a charger that clearly supports LiFePO4 batteries. We do not recommend replacing it with a standard lead-acid battery charger.

3. Suitable Charging Current A higher charging current can charge the battery faster, but it must remain within the allowed range of the battery. Please select the proper charging current according to the product detail page or user manual.

4. Safety Protection Features We recommend choosing a charger with over-voltage protection, over-current protection, short-circuit protection, temperature protection, and automatic stop-charging function.

5. Suitable for Your Application If the charger will be used in an RV, boat, solar power system, or outdoor environment, choose charging equipment suitable for that scenario and make sure the installation environment is safe, dry, and well ventilated.

If you are not sure which charger to choose, please contact the BUKNUWO customer support team and provide your battery model, capacity, and application scenario. We will help you choose a suitable option.

When connecting BUKNUWO LiFePO4 batteries, the two most common methods are series connection and parallel connection. These two connection methods serve different purposes. The main difference is how they affect the battery bank’s voltage and capacity.

1. Series Connection A series connection means connecting the positive terminal of one battery to the negative terminal of the next battery.

When batteries are connected in series, the total voltage of the battery bank increases, while the capacity in Ah remains the same.

For example, two 12.8V 100Ah batteries connected in series can form an approximately 25.6V 100Ah battery bank. Four 12.8V 100Ah batteries connected in series can form an approximately 51.2V 100Ah battery bank.

Series connection is commonly used for applications that require a higher system voltage, such as 24V, 36V, or 48V energy storage systems.

2. Parallel Connection A parallel connection means connecting all positive terminals together and all negative terminals together.

When batteries are connected in parallel, the total capacity in Ah increases, while the voltage remains the same.

For example, two 12.8V 100Ah batteries connected in parallel can form an approximately 12.8V 200Ah battery bank. Four 12.8V 100Ah batteries connected in parallel can form an approximately 12.8V 400Ah battery bank.

Parallel connection is commonly used for applications that require longer runtime or greater capacity, such as RVs, boats, solar energy storage, and off-grid systems.

Important Note: Before connecting batteries in series or parallel, please make sure your battery model supports the intended connection method. Connection limits may vary depending on the battery voltage and model. Always refer to the product detail page and user manual for accurate information.

BUKNUWO LiFePO4 batteries support series and parallel expansion, but the supported connection method varies by battery voltage.

12V Series Batteries: Supports up to 4S4P BUKNUWO 12V LiFePO4 batteries are low-voltage battery models and typically support up to a 4S4P connection.

This means 12V batteries can support:

4S: Up to 4 batteries connected in series to increase system voltage. 4P: Up to 4 parallel strings to increase total capacity. 4S4P: A battery bank with up to 16 batteries in total.

For example, using a 12.8V 100Ah battery:

1 battery: approximately 12.8V 100Ah, 1280Wh 4 batteries in series: approximately 51.2V 100Ah, 5120Wh 4 batteries in parallel: approximately 12.8V 400Ah, 5120Wh 4S4P configuration: approximately 51.2V 400Ah, 20480Wh

24V / 36V / 48V Series Batteries: Supports 1S4P Only BUKNUWO 24V, 36V, and 48V LiFePO4 batteries are already designed for higher-voltage systems, so they should not be connected in series to further increase voltage.

These battery models typically support only a 1S4P connection, which means:

1S: No additional series connection. The system voltage remains the same. 4P: Up to 4 batteries of the same model can be connected in parallel to increase capacity and runtime.

For example, using a 24V 100Ah battery:

1 battery: approximately 25.6V 100Ah 2 batteries in parallel: approximately 25.6V 200Ah 4 batteries in parallel: approximately 25.6V 400Ah

After parallel connection, the voltage remains the same while the capacity increases.

Please do not connect 24V, 36V, or 48V batteries in series. Doing so may cause excessive voltage, BMS mismatch, system failure, or potential safety risks.

4S4P is a common battery connection term that describes a battery bank made with both series and parallel connections.

S = Series P = Parallel

4S means 4 batteries connected in series to increase voltage. 4P means 4 parallel strings connected to increase capacity. 4S4P means connecting 4 batteries in series as one string, and then connecting 4 of these strings in parallel.

For example, using a 12.8V 100Ah battery:

Single battery: 12.8V 100Ah After 4S series connection: 51.2V 100Ah After 4P parallel connection: capacity increases to 400Ah Final 4S4P battery bank: approximately 51.2V 400Ah

This configuration is suitable for systems that require both higher voltage and larger capacity, such as RV energy storage, solar energy storage, off-grid systems, and backup power systems.

Please note that 4S4P only applies to supported 12V low-voltage battery models. BUKNUWO 24V, 36V, and 48V batteries do not support 4S4P. They only support 1S4P parallel expansion.

1S4P means the batteries are not connected in series and are only connected in parallel for capacity expansion.

1S means the system keeps the original battery voltage without series connection. 4P means up to 4 batteries of the same model can be connected in parallel to increase capacity.

BUKNUWO 24V, 36V, and 48V LiFePO4 batteries typically use a 1S4P connection method. In other words, these higher-voltage models should not be connected in series again. They can only be connected in parallel to increase capacity and runtime.

For example, using a 24V 100Ah battery:

1 battery: approximately 25.6V 100Ah 2 batteries in parallel: approximately 25.6V 200Ah 3 batteries in parallel: approximately 25.6V 300Ah 4 batteries in parallel: approximately 25.6V 400Ah

After parallel connection, the system voltage remains the same while the battery capacity increases.

This connection method is suitable for applications where users want longer runtime or greater energy storage capacity without increasing system voltage.

To ensure safe and stable operation of the battery system, please pay attention to the following points when connecting batteries in series or parallel:

1. Use batteries of the same model Whenever possible, use batteries of the same brand, same model, same voltage, same capacity, and similar condition.

2. Do not mix new and old batteries We do not recommend mixing new batteries with old batteries. This may lead to inconsistent battery performance and affect battery life.

3. Confirm whether the connection method is supported 12V batteries typically support up to 4S4P, while 24V, 36V, and 48V batteries typically support only 1S4P. Do not exceed the allowed connection range stated for the product.

4. Keep battery voltage consistent before connection Before connecting batteries in series or parallel, make sure the voltage of each battery is close. This helps avoid excessive balancing current caused by large voltage differences.

5. Use properly rated cables and protection devices Select suitable cables, fuses, circuit breakers, and busbars according to the system current. This helps prevent cable overheating, poor connection, and potential safety risks.

6. Connect the positive and negative terminals correctly Always confirm the positive and negative terminals before connection. Incorrect polarity may damage equipment or create safety hazards.

7. Follow the product manual Connection limits may vary by battery model. Please read the product manual before connection, or contact the BUKNUWO customer support team to confirm the correct connection plan.

No. We do not recommend connecting batteries with different voltages together.

For example, do not connect a 12V battery with a 24V, 36V, or 48V battery. Batteries with different voltages may have different BMS designs, internal structures, charge and discharge parameters, and protection logic. Mixing them may cause system failure, unbalanced charging or discharging, BMS protection shutdown, or potential safety risks.

If you need a higher-voltage system, please choose a battery model with the correct voltage, or use supported 12V batteries in series according to the product manual.

If you are not sure whether to use series connection, parallel connection, 4S4P, or 1S4P, we recommend contacting the BUKNUWO customer support team before making any connections.

To help us provide a more accurate recommendation, please provide the following information:

Your battery model and quantity; Your required system voltage, such as 12V, 24V, 36V, or 48V; Your device power and expected usage time; Your application scenario, such as RV, boat, solar system, off-grid system, or backup power; Your planned charging method and inverter specifications.

We will provide a suitable connection recommendation based on your application scenario and product specifications.

To help maintain stable performance and extend the service life of your BUKNUWO LiFePO4 battery, we recommend installing the battery in a dry, well-ventilated, stable location that is easy to inspect.

BUKNUWO batteries are suitable for installation in RV battery compartments, protected marine compartments, solar energy storage boxes, off-grid system cabinets, backup power equipment areas, or other safe and stable battery installation spaces.

When installing the battery, please pay attention to the following points:

1. Avoid Direct Sunlight Do not place the battery in direct sunlight for long periods. High temperatures may affect battery performance and service life.

2. Avoid Moisture or Standing Water The battery should not be installed in areas that are prone to water ingress, standing water, or long-term humidity. If used in marine, outdoor, or solar power systems, we recommend using a waterproof battery box or installing the battery in a protected enclosure.

3. Maintain Good Ventilation Although LiFePO4 batteries require less maintenance than lead-acid batteries, they should still be installed in a well-ventilated area. Avoid keeping the battery in an enclosed high-temperature space for long periods.

4. Keep Away from Heat Sources and Flammable Materials Keep the battery away from engine heat, open flames, heating equipment, and flammable materials to ensure safe operation.

5. Make Sure the Installation Space Is Suitable Before installation, confirm that the battery dimensions match the available space. Leave enough room for wiring, inspection, maintenance, and any possible future series or parallel expansion.

When using a BUKNUWO LiFePO4 battery in winter or low-temperature environments, proper maintenance helps protect the battery cells, extend battery life, and maintain stable performance.

Please follow these recommendations:

1. Avoid Charging at Extremely Low Temperatures LiFePO4 batteries should not be force-charged in extremely low-temperature conditions. Charging at low temperatures may affect cell performance and, in severe cases, may cause irreversible damage. If the battery is equipped with low-temperature protection, the BMS will limit or stop charging when the temperature is too low to help protect the battery.

2. Store in a Dry, Cool, and Non-Freezing Environment If the battery will not be used for a long time during winter, store it in a dry, well-ventilated place where it will not freeze. The ideal storage location should be away from rain, snow, moisture, standing water, and extreme cold.

3. Keep an Appropriate State of Charge Before Storage For long-term storage, we recommend keeping the battery at approximately 50%–70% state of charge. Avoid storing the battery fully charged or completely discharged for long periods.

4. Avoid Long-Term Over-Discharge In low-temperature environments, keeping the battery at a very low charge level for a long time may affect battery health. During winter storage, check the battery level regularly and recharge it when necessary.

5. Inspect the Battery Regularly During winter storage or use, regularly check the battery case, terminals, cables, and battery level. If you notice any unusual smell, deformation, leakage, abnormal heat, loose terminals, or other abnormal conditions, stop using the battery and contact the BUKNUWO customer support team.

In general, the key to winter maintenance is to avoid charging in extremely low temperatures, prevent over-discharge, maintain a proper state of charge, and store the battery in a dry, stable, and well-ventilated environment.

If you do not plan to use your BUKNUWO LiFePO4 battery for a period of time, we recommend storing it properly to help maintain performance and extend service life.

1. Charge the Battery to a Suitable Level Before Storage Before long-term storage, keep the battery at approximately 50%–70% state of charge. Do not store the battery fully discharged for a long time, and avoid storing it fully charged for extended periods.

2. Disconnect All Loads and Charging Devices Before storage, disconnect the battery from loads, inverters, chargers, solar charge controllers, or other connected devices. This helps prevent standby power consumption from causing over-discharge.

3. Choose a Suitable Storage Environment Store the battery in a dry, well-ventilated, cool, and clean location. Avoid direct sunlight, high temperatures, moisture, standing water, excessive dust, or corrosive environments.

4. Keep Away from Heat Sources and Flammable Materials The battery should be kept away from open flames, heating equipment, engine heat, and flammable materials to ensure safe long-term storage.

5. Check the Battery Level Regularly During long-term storage, we recommend checking the battery voltage or SOC status every 1–3 months. If the battery level is too low, recharge it properly with a charger that supports LiFePO4 batteries.

6. Inspect the Battery Before Reuse After long-term storage, check the battery case, terminals, cables, voltage, and state of charge before connecting it to your equipment. Make sure there are no abnormal conditions before use.

Proper storage can help reduce the impact of natural self-discharge and keep your BUKNUWO battery performing reliably for a longer service life.

Yes. Shopping on the BUKNUWO official website is safe. We value the security of our customers’ account information, order information, and payment details, and we strive to provide a stable and reliable shopping experience.

To help ensure a safe shopping experience, please keep the following tips in mind:

1. Visit the Official Website Please place orders only through the BUKNUWO official website. Avoid entering personal or payment information through unknown links or unofficial pages.

2. Check for a Secure Website Connection Before submitting an order or making a payment, make sure the browser address bar shows a secure connection, such as “https://”.

3. Use Secure Payment Methods Please complete your payment through the official checkout page using supported secure payment methods, such as credit cards, debit cards, PayPal, or other available payment options.

4. Protect Your Account Information Do not share your account password, verification codes, payment information, or order details with unofficial channels.

5. Contact Us if You Need Help If you experience any issues during checkout, payment, order confirmation, or after-sales service, please contact the BUKNUWO customer support team through our official website.

The payment methods supported on the BUKNUWO official website may vary depending on your country, region, and the available options shown at checkout. Common payment methods may include:

1. Credit Cards / Debit Cards Major card payment options such as Visa, Mastercard, American Express, Discover, and other supported cards may be available.

2. PayPal If PayPal is displayed at checkout, you can complete your payment securely through PayPal.

3. Other Local Payment Methods In some regions, Apple Pay, Google Pay, or other local digital wallet options may be available. Please refer to the payment methods displayed on the checkout page.

If your payment fails, please check your card information, billing address, network connection, and payment limit. You may also try placing the order again with a different payment method.

BUKNUWO handles return and refund requests based on the order status, product condition, and reason for after-sales service. To help us resolve your request faster, please prepare your order number, purchase email address, product photos, or a clear description of the issue before contacting us.

General situations include:

1. Orders Not Yet Shipped If your order has not yet been shipped, please contact us as soon as possible to request order cancellation. We will do our best to assist based on the current order processing status.

2. Orders Already Shipped but Not Yet Delivered If your order has already been shipped, tracking information has been generated, or the package is in transit, the order usually cannot be cancelled directly. You may request further assistance according to our return policy after receiving the product.

3. Wrong Item Received or Missing Accessories If the product you received does not match your order, or if any accessories are missing from the package, please contact us promptly. Provide your order number, photos of the outer packaging, product photos, and a description of the missing items. We will review the situation and provide a suitable solution, such as replacement parts, exchange, or other support.

4. Damaged Product or Quality Issue If the product is damaged during shipping or you notice any abnormal condition, please stop using it and contact the BUKNUWO customer support team as soon as possible. Please provide clear photos, videos, and a detailed description of the issue so we can review the case and offer after-sales support.

5. Returns for Non-Quality Reasons If you need to return a product for personal reasons, such as ordering the wrong model, choosing the wrong size, or no longer needing the product, please contact us first to confirm whether the item meets the return conditions. The product should generally be undamaged, include all accessories, and preferably remain in its original packaging.

6. Do Not Return Products Without Authorization Please do not send products back before contacting BUKNUWO customer support and receiving return instructions. Unauthorized returns may affect the refund processing timeline.

Specific return and refund conditions may vary depending on the product model, order status, and regional policy. Please refer to the BUKNUWO Return & Refund Policy page for detailed information.

If you need to request a return or refund, please follow the steps below:

1. Contact Customer Support Please contact us through the BUKNUWO official website and provide your order number, purchase email address, product model, and a description of the issue.

2. Provide Supporting Materials If the issue involves product damage, a quality problem, wrong shipment, or missing items, please provide clear product photos, packaging photos, label photos, or videos to help us review the issue more quickly.

3. Wait for Customer Support Review The BUKNUWO customer support team will review your request based on the order status, product condition, and after-sales policy. We will then provide the appropriate solution.

4. Return the Product According to Instructions If a return is required, please ship the product back according to the return address and packaging instructions provided by our customer support team. Please pack battery products carefully to avoid damage during return shipping.

5. Refund or Exchange Processing After we receive the returned product and complete the inspection, we will arrange a refund, exchange, or other after-sales solution based on the review result. The refund arrival time may vary depending on the payment method and bank processing time.

BUKNUWO’s shipping coverage may vary depending on the product type, warehouse inventory, shipping policy, and destination country or region.

Because LiFePO4 batteries are powered products, cross-border shipping, air transportation, and delivery to certain regions may be affected by logistics regulations, warehouse availability, and carrier restrictions. Therefore, shipping may not be available to all countries or regions.

If you are not sure whether BUKNUWO batteries can be shipped to your location, please contact us through the official website before placing your order. Provide your country, city, and postal code, and we will help confirm the available shipping options and estimated delivery plan.

BUKNUWO will process paid orders as quickly as possible. The exact shipping and delivery time may vary depending on inventory status, warehouse location, shipping address, logistics method, holidays, weather, and other factors.

In general:

1. Order Processing Time After your payment is completed, we will arrange warehouse processing as soon as possible. Some orders may require 1–2 business days for confirmation, packing, and dispatch.

2. Shipping Transit Time After the order is shipped, the transit time may vary depending on the destination and shipping method. Delivery to remote areas, holidays, or unexpected circumstances may result in delays.

3. Tracking Information After your order is shipped, you will usually receive tracking information. You can use the tracking number to check the package status.

If your order has no tracking update for a long time, or if the estimated delivery time appears abnormal, please contact the BUKNUWO customer support team. We will help check the order status.

After an order is successfully placed, the system usually sends an order confirmation email to the email address provided at checkout. After the order is shipped, a shipping notification or tracking information will also be sent.

If you have not received these emails, it may be due to one of the following reasons:

1. Incorrect Email Address Please check whether the email address entered during checkout is correct.

2. Email Sent to Spam or Promotions Folder Please check your spam, junk, promotions, advertising, or other email folders.

3. Email Server Delay Some email providers may experience delays. Please check again later.

4. Order Has Not Yet Shipped If your order is still being processed, the shipping notification email may not have been sent yet.

If you still cannot find your order confirmation email or shipping notification, please contact the BUKNUWO customer support team and provide your name, order email address, order number, or payment information. We will help you check your order status.

We do not recommend using a virtual phone number when placing an order.

To ensure smooth delivery, please provide a real, valid phone number that can be reached. The shipping carrier may need to contact you by phone for delivery, address confirmation, or delivery exceptions.

Using a virtual phone number, invalid number, or unreachable number may result in delivery failure, delayed delivery, or the package being returned to the warehouse.

BUKNUWO respects and protects your personal information. Your contact information will only be used for order processing, shipping delivery, and necessary after-sales communication.