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Hybrid inverter

EG4 18kPV: specs and datasheet

  • UL 1741 SB
  • NEMA 4X
  • CEC
  • CSIP

The 18kPV is the hybrid inverter the maker calls its flagship: 12,000 W at 240 V (10,400 W at 208 V), three MPPTs and up to 21,000 W of recommended solar. Plan strings to its 550 V high-protection limit rather than the 600 V maximum. The datasheet recommends at least 300 Ah of battery per inverter and lists NEMA 4X, up to 10 units in parallel and a 10-year warranty.

Output
12 kW
Battery
48 VDC
Solar input
21,000 W
MPPTs
3
Warranty
10-year standard warranty

Datasheet checked Sep 30, 2026

About the 18kPV

The 18kPV is the hybrid inverter the maker calls its flagship: 12,000 W at 240 V (10,400 W at 208 V), three MPPTs and up to 21,000 W of recommended solar. Plan strings to its 550 V high-protection limit rather than the 600 V maximum. The datasheet recommends at least 300 Ah of battery per inverter and lists NEMA 4X, up to 10 units in parallel and a 10-year warranty.

In one line An inverter turns the DC power from solar panels and batteries into the AC power household appliances use.

Key features · as listed by the maker

  • Off-grid, grid-assist and grid-tied modes
  • EMP-hardened, per the maker
  • Built-in Wi-Fi for remote monitoring in the EG4 app
  • Up to 10 units in parallel

How power moves

Solararray 18kPVinverter Batterybank Houseloads Gridutility
  • Up to 21.0 kW of PV (recommended max)
  • 48 V battery bank
  • 12.0 kW continuous to your loads

Schematic only: it shows the direction of flow in each situation, not measured values. Wiring and code requirements are in the maker’s manual and your local code.

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Specifications

Model number
18KPV-12LV | IV-12000-HYB-AW-XX
Continuous output
12,000 W @ 240 V | 10,400 W @ 208 V
Surge
With PV: 14,700 W (10 min), 15,500 W (5 min). Without PV: 13,500 W (10 min)
Battery voltage (nominal)
48 VDC
Max battery charge/discharge current
250 A
PV input voltage range
100–600 VDC
MPPT voltage high protection (inverter faults here; plan strings below it)
550 VDC
MPPT operating voltage range
140–500 VDC
Number of MPPTs
3
Max usable PV input current
25 A (MPPT 1) | 15 A (MPPT 2) | 15 A (MPPT 3)
Recommended max solar input
21,000 W
Recommended battery capacity per inverter
≥300 Ah
Idle consumption (normal | standby)
~70 W | ~18 W
Efficiency, battery to grid (max)
94%
Max units in parallel
10
Warranty (as listed)
10-year standard warranty
Outdoor rating
NEMA 4X
Weight
121 lbs (55 kg)
Dimensions (H×W×D)
34.3×20.5×11.2 in (870×520×285 mm)

Each value is the datasheet line as printed (hover or long-press a value to see that line). A missing row means the datasheet does not list it. Specs change with new revisions: check the current datasheet (linked above) before you buy.

Documents and links

Not affiliated with Signature Solar LLC or EG4 Electronics. Trademarks belong to their owners.