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48V Off-Grid ESS · 3× Inverter / 6× Battery · 3-Phase
This configuration pairs three EG4 12000XP V2 hybrid inverters with six EG4 280Ah All-Weather batteries into one pre-matched, closed-loop off-grid system — 85.8kWh of storage and up to 36kW of combined continuous output across a genuine 3-phase connection. Built for large homes, workshops, and off-grid properties that need serious capacity and multi-day autonomy, not just backup power.
Two components, pre-matched and sold as one system.
Qty 3
12,000W continuous output and 24,000W max PV input per unit, with dual MPPT solar tracking on each inverter.
Qty 6
14.3kWh of LiFePO₄ storage per module, IP65-rated with integrated self-heating and internal fire suppression.
Six 14.3kWh LiFePO₄ modules combine into a single closed-loop bank with a full day-plus of stored energy for most homes.
Three inverters working together deliver up to 36kW combined across a genuine 3-phase connection, not three single-phase units side by side.
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.
Six independent MPPT channels across the system track solar production in real time for up to 72kW of combined PV input.
Batteries and inverters 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.
The same system configures from a single inverter and battery up to this full 3-phase, 6-battery build, matching capacity to the property.
A single inverter and battery pair covers a cabin or small home; this configuration is built for something bigger. Three EG4 12000XP V2 inverters combine into a 3-phase system capable of 36kW continuous output, while six 280Ah All-Weather battery modules bank 85.8kWh of usable storage — enough to carry a large home, workshop, or off-grid estate 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. Closed-loop communication between every battery and inverter keeps charge and discharge coordinated automatically across the whole bank, rather than treating each unit as an independent guess. The inverters themselves remain IP20 (indoor/enclosed installation only) — it's the battery bank that's built for the elements here, not the power electronics.
Per-unit values below; this configuration uses 3 inverters and 6 batteries.
Inverter — EG4 12000XP V2 (×3)
| 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 (×6)
| 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× | 1–3× | 14.3–42.9 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 |
Three EG4 12000XP V2 hybrid inverters and six EG4 280Ah All-Weather battery modules, pre-matched to run as a single closed-loop system — 85.8kWh of storage and up to 36kW of combined 3-phase output.
Three-phase power is what most commercial buildings, larger workshops, and some well pumps or HVAC equipment require to run efficiently. If a property or its equipment is wired for single-phase 120/240V only, a smaller 1× or 2× inverter configuration is usually a better and less expensive fit.
Yes — the EG4 All-Weather battery is IP65-rated with integrated self-heating, built specifically for direct outdoor or unconditioned-space installation. The inverters are IP20 and still need a covered, indoor-equivalent location such as a garage, utility room, or power shed.
The platform scales from a single inverter and battery up to this 3-phase, 6-battery build, so it's possible to start smaller and add units later — though matching an existing installation's firmware and configuration is worth confirming before ordering additional hardware.
The batteries carry a 10-year manufacturer's warranty and the inverters carry a 5-year manufacturer's warranty — two separate coverage periods for the two components.
Yes. Each inverter accepts grid and generator input in addition to solar, with a recommended generator size of 6,000–15,000W per inverter on this platform.
Given the voltages, currents, and 3-phase wiring 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
