Full specifications

Brand	SolarMax
Inverter Specifications
Model	SM-ORION-ULTRA-8KW
Inverter type	Off-Grid
Grid type	Single Phase
PV Input Data
Max DC input power	10000 W
PV input voltage	500 V
MPPT voltage range	90-450 V
Max. PV input current	27 A
No. of MPPT	2
AC Output Data
Rated AC output	8000 W
Rated voltage	230 V
Smart load / generator input	Yes
Parallel operation	Yes
Battery Data
Battery type	Lithium & Lead-Acid
Battery voltage range	48 V
Max. charging current	150 A
Max. discharging current	150 A
BMS	USB / RS232 / RS485 / WiFi / Dry-contact / BTS
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	20 kg
Operating temperature	-10°C ~ +50°C
Size (W×H×D)	503.6 × 530.8 × 158.4 mm

Note: No grid export and no net metering - the datasheet has no grid-output or feed-in section. It runs the load from PV and battery and takes utility or generator as a backup charging source, which is not the same as being grid-interactive. 8000 VA rated with a 16,000 VA surge, and dual AC output rated at the full 8 kW. Two independent AC sources, utility and generator, switched automatically. PV comes in as 5000 W per channel, 27 A each and 40 A combined, over a 90-450 V window on a 500 V ceiling. 150 A solar charging but 120 A from utility, 150 A maximum combined, on a 48 V bank; overcharge cut-out is set at 66 V, higher than the 11 kW sibling's 63 V. Parallels to 6 units in single or three phase. Optional GFCI, rapid shutdown and AFCI detection; built-in current transformer sensor. Shares the 11 kW chassis and datasheet at 503.6 × 530.8 × 158.4 mm and 20 kg. The sheet prints no efficiency figure.