EG4 Electronics, all-in-one off-grid inverter

EG4 12000XP V2 Off-Grid Inverter

Also written as EG4 12000XP, 12kXP, EG4 12kW

A 12 kW split-phase off-grid inverter with 24 kW of solar input, the step up from the 6000XP for a whole house, shop or farm.

Not yet available

Best for

A full-time off-grid house or farm with an electric range, dryer, well pump or EV charger.

Photo pending: we only show images we own or are licensed to use.

Strengths

12,000 W continuous at 240 V from battery; 18,000 W surge for 5 s (EG4 dealers).
Two MPPT inputs, 12,000 W each, 24,000 W total, 500 V max (EG4 dealers).
Up to 16 units in parallel (Signature Solar).
UL 1741; 5-year warranty (EG4 dealers).

Limitations

104.7 lb and 34 x 21 in on the wall (Signature Solar).
Idles under 70 W, about 1.7 kWh a day before any load (dealer figure; the daily total is our arithmetic).
EG4 recommends over 400 Ah of 48 V battery per inverter: about four 100 Ah server-rack modules.

What it does not do

Put out 15 kW from battery alone: 15 kW needs solar running and the IV-15000-XP-IN-01 model (Signature Solar).
Export to the grid: it is an off-grid inverter.
Carry UL 9540 as a system unless paired with the EG4 WallMount 280Ah Indoor Battery (dealer).

Specifications

From the cited source on 2026-11-10. "Not verified" means no source we checked published it.

Continuous output	12,000 W at 240 V from battery; 15,000 W with PV (15 kW model only)^[1]
Surge	18,000 W for 5 s^[4]
Solar input	24,000 W used (12,000 W per MPPT); 28,000 W recommended max^[3]
Panel voltage	500 V max; MPPT range 120 to 385 V^[4]
Battery	48 V; 250 A max charge and discharge^[3]
Recommended battery	Over 400 Ah per inverter^[1]
Idle consumption	Under 70 W^[3]
Parallel units	Up to 16 (192 kW)^[1]
Operating temperature	32 to 113 F at full load^[2]
Size / weight	34.25 x 20.87 x 5.91 in / 104.7 lb^[1]
Listing	UL 1741; UL 9540 only with the EG4 WallMount 280Ah^[5]
Warranty	5 years^[5]

Before you buy

A 240 V whole-house system needs a licensed electrician and, in most counties, a permit and inspection.

Sources

EG4 12000XP Off-Grid Inverter V2 (USA Built), Signature Solar (EG4 parent retailer) (retailer), read 2026-11-10. Nominal output 15,000 W with PV, 12,000 W without, at 240 V; parallel up to 16 units (192 kW); 2 MPPTs, 12,000 W each, up to 24,000 W of PV; recommended battery over 400 Ah per inverter; closed-loop with EG4 48 V batteries; 34.25 x 20.87 x 5.91 in; 104.7 lb.
EG4 12000XP Off-Grid Inverter V2, Signature Solar (EG4 parent retailer) (retailer), read 2026-11-10. Model note: 15 kW output is available only on model number IV-15000-XP-IN-01. Operating temperature 32 to 113 F (0 to 45 C) at full load. Price shown $1,899.99 on the non-FEOC listing (not printed on our site).
EG4 12000XP V2 off-grid inverter (dealer listing), Off Grid Source (EG4 dealer) (retailer), read 2026-11-10. 120/240 V; max continuous 15,000 W L1-L2 (7,500 W per leg) with PV; max PV input voltage 500 VDC; nominal MPPT voltage 320 VDC; max utilized solar 24,000 W, recommended max 28,000 W; idle under 70 W; max charge/discharge 250 A, 12,000 W; 48 VDC.
EG4 12000XP V2 off-grid inverter (dealer listing), BigBattery (EG4 dealer) (retailer), read 2026-11-10. Surge 18,000 W for 5 s, 15,000 W for 10 s; MPPT operating range 120 to 385 VDC; min start-up 100 VDC; 5-year EG4 warranty; UL 1741 certificate listed.
EG4 12000XP 12kW hybrid inverter/charger (dealer listing), A1 SolarStore (EG4 dealer) (retailer), read 2026-11-10. UL 1741 for the inverter; UL 9540 for the complete system only when paired with the EG4 WallMount 280Ah Indoor Battery; up to 16 units in parallel; 5-year warranty with registration in the first year or proof of purchase from an authorized distributor.

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