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48V Off-Grid ESS · 1× Inverter / 3× Battery · Standard
This configuration pairs one EG4 12000XP V2 hybrid inverter with three EG4 280Ah All-Weather batteries into a single closed-loop off-grid system — 42.9kWh of storage and up to 12kW of continuous output. It's the most battery capacity a single inverter on this platform supports, giving a full-size home extended autonomy without stepping up to a second inverter.
Two components, pre-matched and sold as one system.
Qty 1
12,000W continuous output and 24,000W max PV input, with dual MPPT solar tracking built in.
Qty 3
14.3kWh of LiFePO₄ storage per module, IP65-rated with integrated self-heating and internal fire suppression.
Three 14.3kWh LiFePO₄ modules combine into a single closed-loop bank — the most storage a single inverter on this platform supports.
One EG4 12000XP V2 inverter handles the full load on its own, with 18,000W of surge headroom (5 sec) for motor starts.
Rated for direct outdoor installation, with a sealed enclosure built to handle rain, dust, and temperature swings without a dedicated equipment room.
Internal heating elements keep the batteries within operating range through cold snaps, so performance doesn't fall off in winter.
Two independent MPPT trackers pull up to 24,000W max, adjusting continuously as sunlight shifts through the day.
Batteries and inverter share live data over RS485/CANBus, coordinating charge and discharge automatically instead of running on fixed assumptions.
Each battery module includes built-in fire suppression on top of active cell balancing and standard BMS protections.
One inverter means one set of breakers and one point of communication with the battery bank — no paralleling multiple units to configure.
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 three 280Ah All-Weather battery modules bank 42.9kWh of usable storage, the maximum a single inverter on this platform supports, enough for a full-size home to run through extended cloudy stretches 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.
Per-unit values below; this configuration uses 1 inverter and 3 batteries.
Inverter — EG4 12000XP V2 (×1)
| 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) |
| 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% |
| 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) |
| 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 (×3)
| 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 |
| 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% |
| Protection rating | IP65 (all-weather) |
| Charging temp range | 32–122°F |
| Discharging temp range | -4–131°F |
| Storage temp range | 32–113°F |
| Weight (each) | 308.6 lbs |
| Dimensions | 36.1 × 22.3 × 9.1 in |
| Communications | RS485, CANBus |
| Warranty | 10 years |
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 |
One EG4 12000XP V2 hybrid inverter and three EG4 280Ah All-Weather battery modules, pre-matched to run as a single closed-loop system — 42.9kWh of storage and up to 12kW of continuous output.
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.
Yes — three 280Ah All-Weather batteries (42.9kWh) is the maximum this platform supports on one EG4 12000XP V2 inverter. Going beyond that means stepping up to their "Large" tier, which pairs a second inverter with additional batteries.
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.
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.
Yes. The inverter accepts grid and generator input in addition to solar, with a recommended generator size of 6,000–15,000W.
Given the voltages and currents involved, installation should be handled by a qualified, licensed electrician or solar installer familiar with your local code requirements.
Battery — EG4 280Ah All-Weather
Inverter — EG4 12000XP V2
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You have 30 days from the delivery date to initiate a return (35 days for orders placed Nov 25-30 and Dec 25-31). Items must be unused, in original packaging with tags attached, and returns require prior authorization from our team.
To start a return: +1 (307) 317-7213, hello@ecosolarkits.com, or live chat. Read the full return and refund policy
