EG4 LL-S Lithium Battery
A 5.12kWh LiFePO4 battery in a standard server-rack box. 100Ah at 51.2V, a touchscreen on the front so you can read state of charge without a laptop, and RS-485 and CAN ports that talk to most major inverters. Stack one to start, add more as the loads grow.
- Comms
- RS485, CAN, ethernet
- Voltage
- 48V (nominal)
- Capacity
- 5.12 kWh
- Warranty
- 10-year limited
- Amp hours
- 100 Ah
- Chemistry
- LiFePO4 with active cell balancing
5.12kWh of storage that bolts into a rack.
The EG4 LL-S is a 48V lithium iron phosphate battery in the standard server-rack format. Each unit holds 5.12kWh, runs 100Ah at 51.2V, and clears 7,000-plus cycles at 80% depth of discharge. A touchscreen on the front shows voltage, charge, and cycle count, so you can check the bank without plugging anything in. It is built for residential storage, backup, and off-grid systems that need room to grow.
5.12kWh per battery
100Ah at 51.2V of LiFePO4 storage in one rack slot. Add slots and the bank grows with the house.
Built-in touchscreen
Read state of charge, voltage, and cycle count right off the front panel. No laptop, no extra monitor.
Talks to most inverters
RS-485 and CAN ports for closed-loop comms with EG4, Sol-Ark, Victron, Schneider, Growatt, Luxpower, and Deye.
Parallel to 64 units
Start with one and stack out to 64 in parallel, up to 327.6kWh on a single bank.
Safety built in
E-Stop rapid shutdown and dual fire arrestors on board, so the battery shuts down clean when it needs to.
UL listed
UL 1973 recognized, UL 9540A tested, and UL 9540 listed, the ratings inspectors and utilities look for.
The LL-S is a solid pick for whole-home backup, daily storage, and off-grid builds that start small and expand later. Drop it in an EG4 battery cabinet, wire it to a FlexBOSS18 or another supported inverter, and add units over time. If you want a newer cell pack in the same footprint, look at the LifePower4 V2.
More Batteries
EG4 Battery Cabinet 6 Slot
The EG4 6-Slot Battery Cabinet is the wall-mounted enclosure for stacking up to six EG4 rackmount batteries into a single bank. Each slot holds one 48V LiFePO4 server-rack-style battery, and the cabinet handles the cable runs, mounting points, and the side panels that keep the install looking clean. Six 100Ah batteries inside this cabinet builds out to roughly 30kWh of usable storage at 48V, which covers most whole-home backup or off-grid scenarios without needing a second cabinet. The arrangement keeps the comms and DC cabling inside the enclosure, with the inverter run out the top or bottom. Sold as the cabinet only. Batteries are sold separately. Pairs with EG4 rackmount lithium batteries like the LL-S and Lifepower4. Bolts to a wall stud and accepts batteries from the front.
$789
EG4 Battery Rack (3 Slot)
The EG4 3-Slot Battery Rack is the smaller sibling of the 6-slot cabinet. It holds up to three EG4 rackmount batteries in a server-rack format and works as a free-standing rack or wall-mounted bank for smaller off-grid and backup builds. Three 100Ah batteries inside this rack lands at roughly 15kWh of usable storage at 48V, which covers a critical-load backup or a starter off-grid bank. Step up to the 6-slot cabinet if you're sizing for whole-home backup or a longer off-grid runtime. Sold as the rack only. Pairs with EG4 rackmount lithium batteries like the LL-S and Lifepower4. Cable management runs inside the rack, with the inverter connection out the back or top.
$500