KeepKnow Lithium Battery Built for RV Life provides consistent, efficient power specifically for RVs. Lightweight and durable, it keeps your appliances, lights, and gadgets running reliably on every journey.
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Free standard shipping on all orders
Estimated to be delivered within 2 - 7 business days
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
KeepKnow Lithium Battery Built for RV Life provides consistent, efficient power specifically for RVs. Lightweight and durable, it keeps your appliances, lights, and gadgets running reliably on every journey.

Expandable battery with BMS low-temperature protection, delivering up to 51.2kW load power, combining high performance, durability, and scalability for demanding RV or energy applications.

BMS protection safeguards the battery from potential risks, ensuring stable, reliable, and long-lasting power performance for all your energy needs, giving peace of mind and consistent efficiency in every use.

Features a built-in LCD screen for real-time monitoring and Bluetooth app control, enabling intelligent system management, easy operation, and enhanced safety for your RV or off-grid power setup.

Designed for the serious DIY enthusiast. Our battery ensures hassle-free communication with top-tier components like Victron Energy and other major brands. Unlock massive energy potential with flexible series and parallel topology (up to 4P4S), allowing you to customize a system that perfectly matches your energy demands.


Maximize your space with this high-density battery, saving 31% more room than conventional LFP batteries, while maintaining lightweight design and versatile, compact power for any application.

High-performance lithium battery for camping, off-grid, marine, and home power needs.

Compatible with multiple RV types, delivering reliable, long-lasting power for Class A, van-type, truck, and travel trailers on every adventure.

A flexible RV charging solution ensures reliable power anytime, anywhere, adapting seamlessly to your energy needs on the road.

| Nominal Voltage | 12.8V |
| Nominal Capacity | 320Ah |
| Nominal Energy | 4.09kWh |
| Com Mode | CAN |
| Life Cycles | 8000 Cycles(80%DOD),at 25°C |
| Charge Voltage | 14.6V |
| Discharge Cut-off Voltage | 10.4V |
| Max. Current Charge / Discharge | 250A |
| Peak Discharging Current | 300A 30s |
| Operating Temperature Charge | 0°C ~ 55°C |
| Operating Temperature Discharge | -20°C ~ 60°C |
| Storage Temperature | -10°C ~ 45°C |
| Max. Num of Connect | 4 Pcs in Series or 4 Pcs in Parallel (In communication only 2 Pcs in Series) |
| Dimensions | 360*310*160mm (14.17*12.20*6.29inch) |
| Weight | 31.8kg (70.1lb) |
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