Full specifications

Brand	SolarMax
Inverter Specifications
Model	SM-ONYX-UL-20KW
Inverter type	Hybrid
Grid type	Three Phase
IP class	IP65
PV Input Data
Max DC input power	40000 W
PV input voltage	1000 V
MPPT voltage range	160-980 V
Max. PV input current	20 A
No. of MPPT	3
No. of strings per MPPT	1
Startup voltage	120 V
AC Output Data
Rated AC output	20000 W
Rated AC output current	30.3 A
Rated voltage	400 V
Smart load / generator input	Yes
Parallel operation	Yes
Power factor	> 0.99 @ rated power (adjustable 0.8 leading to 0.8 lagging)
Battery Data
Battery type	Lithium & Lead-Acid
Battery voltage range	40-60 V
Max. charging current	380 A
Max. discharging current	380 A
BMS	RS485 / CAN / DRM / USB / Bluetooth / WiFi (LAN optional)
Protections
PV reverse polarity detection	Yes
Insulation resistance detection	Yes
Leakage current detection	Yes
AC overcurrent protection	Yes
Output short circuit protection	Yes
Surge protection	Yes
Over voltage protection	Yes
General Specifications
Weight	50 kg
Operating temperature	-25°C ~ +60°C
Max. efficiency	97.6%
Size (W×H×D)	460 × 742 × 266 mm

Note: Grid export is documented on the datasheet, so this model can be net-metered. The largest hybrid in this catalogue. 40,000 W of array access with 30,000 W usable, across three MPPTs at 20 A each (30 A short-circuit), one string per tracker, over a 160-980 V window on a 1000 V ceiling. Two battery inputs on a 48 V bank (40-60 V) giving 380 A charge and 380 A discharge at 20,000 W each way - matched both directions, unlike the 12 kW and 15 kW which taper on discharge. Output 20,000 W nominal, 22,000 VA maximum, with 150% peak for 10 s and a maximum 8,500 W on any single phase for unbalanced loads. Grid pass-through is rated 45 A. Generator input accepts 30,000 W. Transfer under 10 ms typical. Same chassis as the 12 kW and 15 kW at 460 × 742 × 266 mm and 50 kg, IP65 and smart-cooled, rated to 4000 m with derating above 2000 m. Stacks to 9 units.