Hybrid Solar Inverter · 12,000W · 48V
12kW Hybrid Inverter Built for 200A Whole-Home Backup
A UL1741 SB listed 12kW hybrid inverter with 18kW of solar input, 200A whole-home pass-through, IP65 enclosure and both 120/240V split-phase and 120/208V three-phase output – on-grid, off-grid or hybrid.
SGS-12K18MAX Overview
The Sungold Power SGS-12K18MAX brings solar, battery storage and the grid together in one 12kW all-in-one hybrid inverter. Its 200A continuous pass-through means it can sit between the meter and a 200A main panel and back up the entire house – not just a critical-loads sub-panel – and switch to battery in 10ms when the grid drops.
Two MPPT trackers accept 9,000W each (18kW total) with a 550Vdc maximum and 125-450Vdc operating range. The inverter is UL1741 SB, IEEE 1547-2018 and California Rule 21 certified, so it can export excess solar to the grid where net metering is available, and it also supports AC coupling with an existing grid-tied PV inverter. Paired with the PowerMax 51.2V 314Ah outdoor battery it forms a UL 9540 certified energy storage system, which simplifies permitting.
Choose 120/240V split-phase or 120/208V three-phase output, parallel up to six units for 72kW, and manage everything – hybrid grid modes, PV and battery energy management, peak shaving and time-of-use – from the LCD or the mobile app. The IP65 enclosure allows indoor or outdoor mounting.
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SGS-12K18MAX Key Features
200A whole-home backup
Continuous 200A grid pass-through powers the entire main panel during outages instead of a limited critical-loads panel.
18kW of solar input
Two MPPTs at 9,000W / 32A each, 550Vdc maximum and 99.9% tracking efficiency for large residential arrays.
Grid-interactive and certified
UL1741 SB, IEEE 1547-2018, Rule 21 and HECO listed for grid export; AC coupling supports existing grid-tied PV inverters.
UL 9540 system with PowerMax
Inverter and PowerMax 314 outdoor battery are certified together as one ESS, easing inspection and permit approval.
Split-phase or three-phase
Outputs 120/240V split-phase or 120/208V three-phase, and parallels up to six units for 72kW.
IP65, RSD, 10-year warranty
Weather-resistant enclosure for indoor or outdoor mounting, built-in rapid shutdown, AFCI protection and a 10-year manufacturer warranty.
What’s in the Box
- 1×SGS-12K18MAX 12kW hybrid solar inverter
- 1×User manual
SGS-12K18MAX Common Questions
Can the SGS-12K18MAX feed power back to the grid?
Yes. It is UL1741 SB / IEEE 1547-2018 certified and supports grid export, zero-export and self-consumption modes, subject to your utility interconnection agreement.
Does it back up my whole house?
Yes. The 200A continuous pass-through rating lets it be installed on a 200A main service and carry the entire panel, with up to 12kW from the battery during an outage.
What battery should I pair it with?
The PowerMax 16.07kWh 51.2V 314Ah outdoor battery is the certified UL 9540 match. CoreX 5 Pro / Elite and other 48V CAN/RS485 lithium batteries also work.
Can it be installed outdoors?
Yes. The IP65 enclosure is rated for indoor or outdoor mounting, with an operating range of -13°F to 140°F.
SGS-12K18MAX Specifications
SGS-12K18MAX 12kW Hybrid Solar Inverter
| Inverter Output | |
| Rated output power | 12,000W @ 240V / 10,400W @ 208V |
| Peak power | 1.5 x rated (10s) |
| Rated output voltage | 120/240Vac split-phase or 120/208Vac three-phase |
| Output current | 50A |
| Load motor capacity | 6HP |
| Frequency | 50/60Hz |
| Waveform | Pure sine wave |
| Parallel capacity | Up to 6 units (72kW) |
| Battery | |
| Battery type | Lithium-ion / lead-acid / user-defined |
| Rated battery voltage | 48Vdc |
| Voltage range | 40-60Vdc |
| Max grid charging current | 200A |
| Max generator charging current | 200A |
| Max hybrid charging current | 240A |
| PV Input | |
| MPPT trackers | 2 |
| Max PV array power | 9,000W + 9,000W (18kW) |
| Max input current | 32A / 32A |
| Short-circuit current | 40A / 40A |
| Max open-circuit voltage | 550Vdc |
| MPPT voltage range | 125-450Vdc |
| MPPT tracking efficiency | 99.9% |
| Grid / Generator Input | |
| Input voltage range | 90-140Vac |
| Frequency range | 50/60Hz |
| Continuous grid pass-through | 200A |
| General | |
| Dimensions | 33.07 x 17.32 x 10.24 in (840 x 440 x 260 mm) |
| Weight | 105.82 lb (48 kg) |
| Protection | IP65, indoor or outdoor |
| Operating temperature | -13°F to 140°F (derated above 113°F) |
| Noise | <60dB |
| Self-consumption | <100W |
| Cooling | Heat sink + intelligent fan |
| Communication | RS485 / CAN / USB / dry contact; Wi-Fi / GPRS optional |
| Protection functions | Reverse polarity, DC switch per MPPT, output over-voltage varistor, over-current, ground fault monitoring, grid monitoring, pole sensitive leakage current unit, AFCI, RSD |
| Certifications | UL1741 SB, DC Arc-Fault Circuit Protection, UL1699B:2018, CSA C22.2#107.1, California Rule 21, IEEE1547:2018, IEEE1547.1:2020, Hawaiian HECO SRD-IEEE-1547.1:2020 Ed.2.0, FCC 15 Class B |
| Warranty | 10 years |
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