U.S.-based expert support
Freight delivery, quoted after order
Top brands, best prices
Ships by freight. This item is too large for parcel delivery. After you order, we'll contact you within 1 business day with the freight cost and delivery options (liftgate, residential). Your order ships only after you approve the quote.
Need installation or sizing help? Call (888) 831-0450 or ask an expert.
Secure checkout
- 14.3kWh LFP storage at 51.2V
- Built-in 200A BMS, 600A busbars
- Over 8,000 cycles at 80% DOD
- LCD touchscreen BMS display
- Integrated self-heating, dual fire arrestors
- E-Stop with rapid shutdown
- UL 1973 / UL 9540A listed
- 10-year limited warranty
Ships by LTL freight. Too large for parcel delivery. Questions on freight? Call (888) 831-0450.
We accept
The EG4 WallMount Indoor 280Ah is a 48V LiFePO4 battery that stores 14.3kWh for indoor home backup and solar storage. Built-in 600A busbars make multi-battery banks simple. Integrated self-heating keeps it charging in cold rooms, and dual fire arrestors plus an emergency-stop function add safety for indoor installs. Its BMS communicates in closed loop with a wide range of inverter brands.
Highlights
- Built-in 600A busbars: 4 positive and 4 negative terminals for direct paralleling
- Integrated self-heating warms cells for reliable charge and discharge in the cold
- Dual fire arrestors add protection against thermal runaway
- Emergency stop: rapid shutdown with RSD-capable inverters or ESS disconnects
- Advanced BMS logs cell voltage, module current, voltage and temperature in real time
- Closed-loop communication with EG4, Sol-Ark, Victron, Growatt, Deye, Schneider, Luxpower and Megarevo inverters
Ideal for
Whole-home backup, essential-load support, solar self-consumption, and expandable multi-battery installs where a space-saving wall-mounted design matters.
Specifications
| Chemistry | LiFePO4 |
| Nominal voltage | 48V |
| Capacity | 280Ah / 14.3kWh |
| Cycle life | 8,000+ cycles @ 80% DoD |
| Installation | Indoor, wall-mounted |
| Heating | Integrated self-heating |
| Certifications | UL 1973, UL 9540A |
| Dimensions | 36.4 × 18.1 × 9.6 in |
| Weight | 282 lbs (128 kg) |
| Warranty | 10-year EG4 standard warranty |
| Manufacturer | EG4 Electronics |
|---|---|
| Model Number | WM-48-280-IN-LL-XX |
| Chemistry | LiFePO4 |
| Nominal Voltage | 51.2V |
| Capacity | 280Ah |
| Energy | 14.3kWh |
| Max Continuous Charge/Discharge | 140A / 140A |
| Peak Discharge | 200A (30 min) |
| Cycle Life | >8,000 cycles @ 0.5C, 80% DOD |
| Busbars | integrated 600A, 4 positive / 4 negative terminals |
| Communication | RS485/CAN, LCD touchscreen |
| Enclosure | IP20 (indoor) |
| Operating Temp | charge 32-122°F, discharge -4-131°F |
| Dimensions (HxWxD) | 34.1 x 18.1 x 10.4 in (865 x 460 x 264 mm) |
| Weight | 286.6 lb (130 kg) |
| Certifications | UL 1973, UL 9540A; UL 9540 with 18kPV/12kPV/FlexBOSS21 |
| Warranty | 10 years |
Specifications are from the manufacturer and may change. Questions? Call (888) 831-0450.
EG4 10-year limited, prorated warranty
| Coverage | full parts (incl. BMS) or full product replacement; full replacement prorated 1/10 per year after year 1 |
|---|---|
| Registration | register within first year, or keep proof of purchase from an EG4 authorized distributor |
| Transfer | original purchaser; transferable once if unit stays at original site |
| Residential vs commercial | no separate terms stated |
| How to claim | contact original place of purchase |
Download: EG4 WallMount Indoor 280Ah Lithium Battery Warranty Document (v1.1)
Manufacturer warranties are provided by the manufacturer. Keep your invoice as proof of purchase. Questions about a warranty claim? Call (888) 831-0450.