Server Rack Batteries

48V Server Rack Lithium Batteries

The Epoch Batteries 48V 100Ah Server Rack Battery (SR48100H) is a self-heating, stackable, rack-mount LiFePO4 battery built for solar energy storage, home backup, and small commercial off-grid installations. At 5.12kWh per unit and fully compatible with standard 19-inch server racks, it's the go-to solution for DIY solar arrays and battery bank expansions.

Key Features

• 48V 100Ah / 5.12kWh usable capacity, LiFePO4 chemistry
• Self-heating allows safe charging below freezing (typical shutdown on unheated lithium = problem for cold climate installs)
• Stackable design — combine multiple units into 20kWh+ banks with parallel busbar connections
• Victron CANBUS integration — factory-level communication with Victron MultiPlus, MultiPlus-II, Quattro inverters and MPPT charge controllers
• 3U rack mount form factor fits standard 19-inch server racks and battery cabinets
• UL9540 pending — certification in progress for permitted residential installations
• Integrated BMS with cell balancing, over-charge/discharge protection, and short-circuit protection
• 11-year manufacturer warranty — longest in the server rack battery category

Inverter Compatibility

Verified compatible with:

• Victron MultiPlus-II, Quattro, and MPPT charge controllers (CANBUS)
• EG4 6000XP, 12000XP, 18000XP split-phase inverters
• Sol-Ark 8K/12K/15K hybrid inverters
• Growatt SPF / SPH series inverters
• Schneider Conext XW Pro

Use Cases

• Grid-tied solar with backup — pair with hybrid inverter + 5-15kW PV array
• Off-grid cabin and RV installations — 10-20kWh of usable storage in a compact footprint
• Small commercial backup — 4-8 units in parallel for critical-load UPS replacement
• EV charging battery buffer — pre-load solar into batteries, discharge to Level 2 EV chargers during peak demand

Shipping, Installation & Warranty

Ships free on orders over $299 (certain exclusions apply) via LTL freight in 5-10 business days. Requires standard 19-inch rack or battery cabinet. Backed by Epoch's 11-year manufacturer warranty with 100% US-based support at 1-888-501-1846 (Mon-Fri 9AM-4PM EDT). Urban Supply coordinates warranty claims directly with Epoch — no paperwork.

Looking for a place to start? Browse our Off-Grid Solar Battery Bank Sizing: How to Size Your LiFePO4 System.