48V Off-Grid ESS · 1× Inverter / 2× Battery · Standard
28.6kWh of Off-Grid Power From One Matched Inverter and Battery Pair
This configuration pairs one EG4 12000XP V2 hybrid inverter with two EG4 280Ah All-Weather batteries into a single closed-loop off-grid system — 28.6kWh of storage and up to 12kW of continuous output. It’s real capacity for a full-size home or cabin, without the wiring complexity of paralleling multiple inverters together.
What’s In This Configuration
Two components, pre-matched and sold as one system.
Qty 1
EG4 12000XP V2 Hybrid Inverter
12,000W continuous output and 24,000W max PV input, with dual MPPT solar tracking built in.
Qty 2
EG4 280Ah All-Weather Battery
14.3kWh of LiFePO₄ storage per module, IP65-rated with integrated self-heating and internal fire suppression.
What Makes This Configuration Different
28.6kWh Total Capacity
Two 14.3kWh LiFePO₄ modules combine into a single closed-loop bank with enough stored energy to carry a full-size home overnight.
12kW Continuous, 18kW Surge
One EG4 12000XP V2 inverter handles the full load on its own, with 18,000W of surge headroom (5 sec) for motor starts.
All-Weather, IP65 Batteries
Rated for direct outdoor installation, with a sealed enclosure built to handle rain, dust, and temperature swings without a dedicated equipment room.
Integrated Self-Heating
Internal heating elements keep the batteries within operating range through cold snaps, so performance doesn’t fall off in winter.
Dual MPPT Solar Charging
Two independent MPPT trackers pull up to 24,000W max, adjusting continuously as sunlight shifts through the day.
Closed-Loop Communication
Batteries and inverter share live data over RS485/CANBus, coordinating charge and discharge automatically instead of running on fixed assumptions.
Internal Fire Suppression
Each battery module includes built-in fire suppression on top of active cell balancing and standard BMS protections.
Single-Inverter Simplicity
One inverter means one set of breakers and one point of communication with the battery bank — no paralleling multiple units to configure.
Real Capacity, Simpler Wiring
A single battery module covers a cabin or a light backup role; this configuration is built for something more substantial. One EG4 12000XP V2 inverter delivers 12,000W of continuous output — 18,000W surge — while two 280Ah All-Weather battery modules bank 28.6kWh of usable storage, enough for a full-size home to get through an evening or a cloudy stretch without rationing power.
The All-Weather battery line is IP65-rated with integrated self-heating and internal fire suppression, so it doesn’t need a climate-controlled room the way an indoor-only battery would. Because this configuration runs on a single inverter rather than multiple units in parallel, the system stays simpler too — one communication link between inverter and battery bank, one set of breakers, one unit to monitor. The inverter itself remains IP20 (indoor/enclosed installation only) — it’s the battery bank that’s built for the elements here.
Full Specifications
Per-unit values below; this configuration uses 1 inverter and 2 batteries.
Inverter — EG4 12000XP V2 (×1)
Output
| Nominal output power | 12,000 W @ 240V |
| Surge capacity | 18,000 W (5 sec) |
| AC voltage | 120/240V, 120/208V |
| Max continuous output current | 50A @ 240V |
| Power factor | 0.99 |
| Switching time | <10 ms (single) |
Solar & Charging
| MPPT channels | 2 per unit |
| Max PV input | 24,000 W (12,000W/MPPT) |
| MPPT voltage range | 120–385 Vdc |
| Max charge/discharge current | 250 A |
| Battery voltage range | 46.4–60 Vdc |
| Efficiency (PV to loads) | 93.5% |
AC Input
| Max AC input power | 24,000 W |
| AC bypass (grid / gen) | 100A / 90A |
| Rec. generator size | 6,000–15,000 W |
| Frequency | 60 Hz (50 Hz configurable) |
Physical & Other
| Weight (each) | 104.7 lbs |
| Dimensions | 34.25 × 20.9 × 5.9 in |
| Protection rating | IP20 (indoor only) |
| Operating temp (full load) | 32–113°F |
| Max parallel units | 6 |
| Warranty | 5 years |
Battery — EG4 280Ah All-Weather (×2)
Capacity
| Nominal voltage | 51.2 V |
| Chemistry | LiFePO₄ |
| kWh capacity (each) | 14.3 kWh |
| Ah capacity (each) | 280 Ah |
| Max continuous discharge rate | 10,240 W |
Charging
| Max continuous charge current | 140 A |
| Max continuous discharge current | 140A (200A / 30 min) |
| Rec. charge/discharge current | 60–140 A |
| Rec. SoC cutoff | 20% |
Environmental
| Protection rating | IP65 (all-weather) |
| Charging temp range | 32–122°F |
| Discharging temp range | -4–131°F |
| Storage temp range | 32–113°F |
Physical & Other
| Weight (each) | 308.6 lbs |
| Dimensions | 36.1 × 22.3 × 9.1 in |
| Communications | RS485, CANBus |
| Warranty | 10 years |
Other Configurations Available
This same battery and inverter platform is sold in several sizes. The row below highlighted in your brand color is the configuration this page describes — everything else is shown for reference if a customer needs a different scale.
| Tier | Inverters | Batteries | Capacity | Max Output |
|---|---|---|---|---|
| Standard | 1× | 1× | 14.3 kWh | 12 kW |
| Standard | 1× | 2× | 28.6 kWh | 12 kW |
| Standard | 1× | 3× | 42.9 kWh | 12 kW |
| Large | 2× | 2, 4, or 6× | 28.6–85.8 kWh | 24 kW |
| 3-Phase | 3× | 6× | 85.8 kWh | 36 kW |
Common Questions
What exactly is included in this configuration?
One EG4 12000XP V2 hybrid inverter and two EG4 280Ah All-Weather battery modules, pre-matched to run as a single closed-loop system — 28.6kWh of storage and up to 12kW of continuous output.
Will this run my entire house?
It depends on your total connected load. At 12,000W continuous (18,000W surge) it comfortably covers most full-size homes running efficient appliances, but a full load calculation is worth doing before sizing your system — particularly with well pumps, electric heat, or large HVAC compressors.
Can I add a third battery to this same inverter later?
Yes — a single EG4 12000XP V2 supports up to three 280Ah All-Weather batteries (42.9kWh total) before a second inverter is needed. It’s worth confirming compatibility with your existing setup before ordering additional hardware.
Can the batteries really be installed outdoors?
Yes — the EG4 All-Weather battery is IP65-rated with integrated self-heating, built specifically for direct outdoor or unconditioned-space installation. The inverter is IP20 and still needs a covered, indoor-equivalent location such as a garage, utility room, or power shed.
What’s the warranty on this system?
The batteries carry a 10-year manufacturer’s warranty and the inverter carries a 5-year manufacturer’s warranty — two separate coverage periods for the two components.
Can it run on solar, grid, and a generator?
Yes. The inverter accepts grid and generator input in addition to solar, with a recommended generator size of 6,000–15,000W.
Do I need a licensed electrician to install it?
Given the voltages and currents involved, installation should be handled by a qualified, licensed electrician or solar installer familiar with your local code requirements.
Documents & Downloads
Battery — EG4 280Ah All-Weather
Inverter — EG4 12000XP V2
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