FAQ
Common questions about products, services and cooperation
FAQ
Common questions about products, services and cooperation
What battery cells do your storage batteries use?
Our storage solutions exclusively utilize LiFePO4 (Lithium Iron Phosphate) cells, renowned for their superior safety and longevity. These cells are designed to deliver up to 6000 cycles at 25°C, with a depth of discharge (DOD) of 90%, ensuring consistent performance over an extended period. The nominal voltage per cell is 3.2V, and they can operate efficiently within a wide temperature range, from -20°C to 60°C. This robust thermal stability, combined with a low self-discharge rate of less than 5% per month, makes our batteries ideal for both residential and industrial applications.
What certifications do your products have?
Our full product line has achieved a comprehensive set of certifications, including CE, TÜV, and other international approvals. Specifically, we hold EU-Type Examination Certificates for all our models, ensuring compliance with European safety standards. Additionally, our products have passed UN38.3 transport tests, confirming their safety during transportation. We also adhere to RoHS directives, limiting the use of hazardous substances, and have obtained CCC certification, meeting the stringent requirements of the Chinese market. These certifications are regularly updated and verified through rigorous testing and audits, ensuring consistent quality and reliability.
What installation methods are supported?
For home applications, our products support both wall-mounted and floor-standing installations, with the capability for flexible parallel expansion up to 15 packs, allowing a total capacity of 45 kWh. For commercial and industrial (C&I) as well as utility-scale projects, we offer robust outdoor cabinets and containerized solutions. The outdoor cabinets can be configured to provide up to 500 kWh, while containerized systems are scalable up to 2 MWh. Installation procedures follow industry standards, ensuring safety and efficiency.
How about inverter compatibility?
Our home batteries are designed to be compatible with a wide range of inverter protocols, including but not limited to Growatt, Deye, and Solis. To ensure seamless integration, our batteries support standard communication protocols such as Modbus, CAN, and RS485. For detailed specifications, including voltage ranges, current ratings, and communication parameters, please refer to the technical documentation available on our website. Our technical team is also available to provide a comprehensive compatibility list and assist with any specific requirements or configurations.
Do you provide OEM/ODM services?
Yes, we provide comprehensive OEM/ODM services. Our offerings include brand customization, appearance design tailored to your specifications, and software protocol adjustments. With over 10 years of industry experience, we have successfully completed more than 500 customization projects. Our team can adapt our products, which cover a range from 3kWh to 500kWh, to meet specific voltage, capacity, and communication protocol requirements. We ensure that all customizations comply with international standards and certifications, such as CE, UL, and IEC, guaranteeing reliability and performance.
How to get a quotation?
To obtain a detailed quotation, kindly complete our online inquiry form, specifying the model number, required specifications such as capacity and voltage, the desired quantity, and your delivery destination. Our team will review your request, and within 24 hours, you will receive a comprehensive quotation that includes unit pricing, total cost, shipping options, and an estimated delivery timeline. For large or customized orders, additional information may be requested to ensure accuracy.
What is the warranty period?
The warranty period for home storage batteries typically ranges from 5 to 10 years, depending on the specific model and manufacturer. For commercial and industrial (C&I) as well as utility-scale storage systems, warranty terms are often negotiable and can be customized based on project requirements. In the event of a defect, our standard procedure involves a thorough diagnostic assessment, followed by either repair or replacement at no additional cost. This process is designed to ensure minimal downtime and maximum system reliability.
What is the cycle life of the battery?
The cycle life of LiFePO4 cells is rated up to 6000 cycles at 25°C, assuming a depth of discharge (DoD) of 80%. This translates to over 15 years of daily full charge and discharge cycles in typical residential applications. At a lower DoD, such as 50%, the cycle life can extend beyond 8000 cycles, further increasing the operational lifespan. It is important to note that maintaining optimal operating temperatures and adhering to recommended charging and discharging protocols significantly contribute to achieving these longevity benchmarks.
Do you support off-grid operation?
Yes, our storage systems support off-grid operation. When paired with an off-grid capable inverter, such as the XYZ 5000 model, which has a switching time of less than 10 milliseconds, the system can seamlessly transition to off-grid mode during power outages. This ensures that critical loads, up to 5 kW, remain powered. The process involves monitoring grid status, initiating the switch upon detecting an outage, and stabilizing the output to maintain consistent power supply. Our systems are designed to provide reliable energy independence for both residential and industrial applications.
What is the IP rating of the products?
Our outdoor storage products are designed to withstand harsh environmental conditions, featuring an IP66 rating. This means they are completely protected against dust ingress and can resist powerful water jets from any direction, ensuring durability in various weather scenarios. For indoor applications, our products meet or exceed the IP20 standard, providing adequate protection against solid objects larger than 12mm and preventing the entry of fingers or similar objects, while also safeguarding against vertically falling drops of water. These ratings ensure that our products maintain optimal performance and longevity in their respective environments.
What are the payment and delivery terms?
For regular orders, we accept T/T (Telegraphic Transfer) and L/C (Letter of Credit) as payment methods. Sample orders are typically delivered within 2-3 weeks after the order is confirmed. For bulk orders, the delivery time ranges from 4 to 6 weeks, depending on the specific quantity and configuration. We recommend placing orders at least 8 weeks in advance for large quantities or custom configurations to ensure timely delivery. Our logistics team will provide a detailed timeline and tracking information once the order is processed.
How is after-sales service provided?
Our after-sales service encompasses a wide range of support, including detailed installation guidance with step-by-step manuals and video tutorials. We provide 24/7 remote technical assistance, ensuring that any issues are addressed promptly. Our team can diagnose and resolve faults within an average of 48 hours, with a 95% first-time fix rate. For our OEM partners, we assign dedicated support teams, each with over 5 years of industry experience, to ensure seamless integration and ongoing support. Regular maintenance checks and software updates are also part of our comprehensive service package.
Are you a LiFePO4 battery manufacturer or factory?
Yes. PowerKeep is a battery manufacturer and factory established in 1994, with 30 years of experience in batteries and energy storage. We produce LiFePO4 cells, battery packs and complete storage systems on our own production lines, and we are a certified lithium battery factory supplying portable power stations, home battery storage, commercial cabinets and utility BESS. As a LiFePO4 battery manufacturer we offer direct factory pricing, custom OEM/ODM battery packs and private-label production for distributors and brands worldwide.
What is the minimum order quantity (MOQ) for wholesale orders?
Our standard MOQ is 10 units for existing models, which supports small trial orders for new distributors. For wholesale and battery wholesale pricing, we offer tiered discounts based on order volume, and container orders receive the most favorable factory pricing. OEM/ODM custom orders have a separate MOQ depending on the level of customization — contact our sales team with your target quantity and we will confirm the MOQ and pricing within 24 hours.
Do you work with distributors, agents and importers?
Yes. PowerKeep actively partners with distributors, agents, importers and system integrators worldwide. We provide exclusive-distributor options, flexible wholesale pricing, marketing support, private-label branding and after-sales training to help partners grow local markets. Send us your market and target product lines, and our international sales team will propose a partnership plan, including pricing, lead times and after-sales support.
Energy Storage FAQ Knowledge Base
PowerKeep answers common questions about energy storage products from selection to delivery: how to choose the right home battery storage capacity, charging options for portable power stations, LiFePO4 battery cycle life and safety features, installation and maintenance, international certifications, OEM/ODM custom battery pack services, and lithium battery international shipping regulations.
Whether you are a homeowner, distributor or project buyer, our technical and service team is ready to answer questions about product parameters, solution configuration, ordering process and logistics. Contact us for one-on-one support.
For wholesalers and project buyers, PowerKeep offers factory-direct battery wholesale pricing, flexible MOQs for bulk orders, and transparent LiFePO4 battery price quotes tailored to capacity, voltage and configuration.