28.7 kWh LiFePO4 Home Battery
The EcoPowerWall 28.7 kWh battery is our most powerful home storage solution — delivering genuine energy independence. With over twice the capacity of a Tesla Powerwall 3, it can power your entire home for 18–24 hours without any solar input. Paired with solar panels, you can go days without drawing from the grid.
Why It's Our Best Seller
28.7 kWh covers everything — HVAC, EV charging, kitchen appliances, lighting, entertainment, and more. Whether you're preparing for extended outages, going off-grid, or maximizing solar self-consumption, this is the system that delivers.
Key Specifications
- Usable capacity: 28.7 kWh
- Chemistry: LiFePO4 (Lithium Iron Phosphate)
- Nominal voltage: 48V
- Depth of discharge: 95%
- Cycle life: 6,000+ cycles at 80% capacity retention
- Round-trip efficiency: 96%
- Operating temperature: -20°C to +55°C
- Warranty: 10 years
- Compare: 2.1× capacity of Tesla Powerwall 3 (13.5 kWh)
Backup Duration
A typical 3-bedroom home uses 1.2–1.5 kWh/hr on essential loads. At this rate, 28.7 kWh provides 18–24 hours of full-home backup — or several days of essential-load-only backup. With a matched solar array recharging during the day, outages can be weathered indefinitely.
LiFePO4 Safety & Longevity
LiFePO4 chemistry is inherently non-flammable and thermally stable — safe for garage, basement, or utility room installation without the fire risk of NMC batteries. At 6,000 cycles with 80% capacity retention, this battery lasts 16+ years of daily use.
Perfect For
- Homes 2,000–5,000 sq ft with full appliance loads including HVAC
- EV owners who want to charge from solar overnight
- Off-grid and remote properties
- Homeowners in high-outage areas or with critical load requirements
- Maximum solar self-consumption and utility bill elimination