EG4 WallMount Indoor 280Ah 48V Heated LiFePO4 Wall Battery
A 14.3 kWh, 51.2 V indoor wall battery with built-in heating, CAN and RS485 closed-loop ports, a front touchscreen and 600 A busbars.
$2,700
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Usability
5.7 out of 10It suits a buyer who wants 14.3 kWh with built-in heating in a garage or utility room, and who will not need more than 140 A continuous from one unit or wireless monitoring from the battery itself.
Strengths
- 14,336 Wh in one 51.2 V unit
- 224 W self-heater switches on at 0°C
- CAN and RS485 closed-loop ports
- Built-in 600 A busbars4+ and 4- terminals
- More than 8,000 cycles at 80 percent DoD
Drawbacks
- 140 A continuous is 0.5C on 280 Ah
- No Bluetooth or Wi-Fi in the battery
- IP20 caseindoor only
- Parallel only: EG4 says never in series
- Full replacement prorated 1/10 a year after year one
Specs
- Capacity6,000 Wh or more
- AC OutputNot applicable
- System Voltage48 V
- Panel PowerNot applicable
- Charge CurrentNot applicable
- Safety ListingUL 1973 listed
- Cell TypeNot applicable
- Low-Temp ChargingSelf-heating
- Warranty10 Years
- MonitoringWired display or port only
- Weight286.6 lb
At a glance
- 34.1 x 18.1 x 10.4 in
- Front LCD touchscreen
- Dual fire arrestors
- Six concrete bolts in box
EG4 is the brand of EG4 Electronics LLC of Sulphur Springs, Texas, part of Energy Access Innovations with its sister company Signature Solar.
It sells with a cart through Signature Solar at signaturesolar.com and through approved distributors and dealers such as Current Connected, Shop Solar and BigBattery, while eg4electronics.com has no cart.
The EG4 WallMount Indoor 280Ah (model WM-48-280-1-IN-LL-00 on its Intertek UL 1973 certificate) is a 51.2 V, 280 Ah LiFePO4 battery storing 14.3 kWh (14,336 Wh), with a BMS rated at 140 A maximum continuous charge and discharge, 200 A discharge for 30 minutes and a short-circuit cut-off above 600 A, a 56.2 V recommended bulk charge and a 54 V float. It charges at 0 to 50°C and discharges at −20 to 55°C, and a 224 W internal heater switches on at 0°C and off at 5°C. It has an LCD touchscreen and run and alarm LEDs on the front, RS485 and CAN ports for closed-loop communication with EG4 and other makers' inverters, battery-comm ports for paralleling, built-in 600 A busbars with four positive and four negative terminals, 120 mA passive cell balancing, dual fire arrestors and an emergency-stop function for rapid shutdown with compatible inverters. EG4 says WallMount batteries must not be connected in series. The IP20 case is for indoor use; it hangs on a wall bracket with its weight on pre-installed feet, measures 34.1 x 18.1 x 10.4 in (865 x 460 x 264 mm) and weighs 286.6 lb (130 kg). The box holds the battery, the mounting bracket, two red and two black 2/0 AWG power cables of 39.4 in, a battery-to-inverter communication cable and six concrete expansion bolts. The All Weather version (SKU 1511075), with an IP65 case, weather-rated quick-connect cables and its own touchscreen, is $3,124.99 on its own Signature Solar page. EG4 sells through its sister company Signature Solar; its warranty covers only units bought from an EG4 approved vendor and registered within the first year or backed by proof of purchase from an authorized distributor.
