Server Rack Batteries

Server Rack Batteries for Scalable Solar & Backup Storage

A server rack battery is a rack-mount LiFePO4 module that slides into a standard rack and links with matching units, so you can start with one battery and expand as your energy needs grow. It is the most practical way to build a clean, high-capacity bank for off-grid solar, home backup, and everyday energy storage.

48V LiFePO4 — the Modern Standard

Most systems today run on 48V (nominal 51.2V), where a single 100Ah module holds about 5.1 kWh. Higher system voltage moves the same power at lower current, which means thinner cabling, less heat, and less wiring loss than a 12V or 24V build. Lithium iron phosphate (LiFePO4) chemistry delivers thousands of cycles, stable thermal performance, and deep usable capacity.

Stack Modules to Grow Your Capacity

Because every module shares the same rack-mount form factor, expanding is simple: add another matched battery and connect it to the busbar, up to the manufacturer's parallel limit. Build from 5 kWh to 20 kWh, 30 kWh, and beyond as your storage needs change.

Pair with the Right Inverter

Match your battery's voltage and communication protocol (CAN or RS485) to your inverter for a coordinated, closed-loop setup. Explore our solar inverters, complete solar panel kits, and full range of solar batteries — or call our experts to confirm compatibility before you buy.

Learn More

New to rack storage? Read our Server Rack Battery Buyer's Guide, see how long server rack batteries last and what they cost, and compare 48V vs 24V vs 12V to choose the right voltage.