RUiXU SUNON12 12kW 48V Off-Grid Inverter, 120/240V Split-Phase
SKUSUNON12
The RUiXU SUNON12 is a 12 kW, 120/240 V all-in-one off-grid inverter for 48 V battery systems. One indoor unit combines a pure sine wave inverter, an MPPT solar charge controller and a grid/generator battery charger. It lets a cabin, shop or...
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Product Overview
The RUiXU SUNON12 is a 12 kW, 120/240 V all-in-one off-grid inverter for 48 V battery systems. One indoor unit combines a pure sine wave inverter, an MPPT solar charge controller and a grid/generator battery charger. It lets a cabin, shop or home run from solar, batteries and a generator or grid supply.
RUiXU lists 120/240 VAC output, single-phase or split-phase, from one unit, with separate grid and generator inputs and a smart-load output. Up to six units can be connected in parallel (72 kW total, per RUiXU).
It is an off-grid (stand-alone) inverter. Grid or generator power can charge the batteries and pass through to the loads. RUiXU's documents do not describe it as a grid-tie inverter that exports power to the utility.
Best For
- Larger off-grid homes that need 240 V: 12,000 W rated, 18,000 VA maximum, 120/240 V split-phase.
- Large arrays on two MPPTs: 12,000 W + 12,000 W maximum solar input and up to 250 A of solar charging.
- Systems with a generator: A dedicated generator input, separate from the grid input.
- RUiXU Lithi2-16 battery systems: RUiXU's Lithi2-16 manual (V2.1) lists the SUNON12 as a compatible inverter.
Key Features & Specifications
| Specification | Details |
|---|---|
| Product type | 48 V all-in-one off-grid inverter/charger with MPPT solar charger (stand-alone) |
| Model | SUNON12 |
| AC output | 12,000 W rated; 18,000 VA maximum; 120/240 VAC single-phase or split-phase |
| Motor load capacity | 6 HP |
| Bypass overload current | 125 A load; 60 A smart load |
| Solar input | 2 MPPTs; 12,000 W + 12,000 W maximum input power; 32 A + 32 A maximum input current; 500 VDC maximum open-circuit voltage; 90–450 VDC MPPT range |
| Charging current | 250 A maximum solar; 160 A maximum grid/generator; 250 A maximum combined |
| Grid and generator inputs | 120 V (L1/N, L2/N) / 240 V (L1/L2); 85–140 VAC per phase ±2%; 50/60 Hz |
| Efficiency | MPPT tracking 99.9%; maximum 93% |
| Parallel | 1–6 units |
| Integrated circuit breakers | Inverter input, generator, load, smart load, battery |
| Dimensions; weight | 785 × 485 × 160.8 mm (30.91 × 19.09 × 6.33 in); 38.5 kg (84.88 lb) |
| Battery | 48 V nominal (40–60 V); lithium-ion, lead-acid or user-defined |
| Output waveform; frequency | Pure sine wave; 50/60 Hz |
| Switching time | 10 ms typical |
| Communication | RS485, CAN, USB, dry contact; Wi-Fi dongle included (RUiXU's store lists it in the box; the spec sheet calls it an external module) |
| Enclosure | IP20, indoor only |
| Temperature | −10°C to 55°C; derates above 45°C |
| Certificates (per RUiXU) | FCC Part 15 Class B; UL 1741 |
| Warranty (per RUiXU) | 5 years |
| Source | RUiXU SUNON12 datasheet (file "260817 SUNON12", PDF dated Aug. 2026, ruixubattery.com); RUiXU dealer product page; RUiXU store product page (ruixubattery.com); RUiXU Lithi2-16 operating manual V2.1 |
What You May Also Need
Usually required
- A 48 V battery bank: The inverter takes a 48 V-class battery (40–60 V). RUiXU's Lithi2-16 battery manual (V2.1) lists the SUNON12 as compatible, with the battery set to RUiXU and the inverter set to battery type LFP16, CAN-BMS and Pylon-CAN protocol. See the RUiXU Lithi2-16 16 kWh battery.
- Battery cables and DC overcurrent protection: Size them for the inverter's maximum charge and discharge current, following RUiXU's manual and the battery maker's instructions.
- Solar panels wired in strings: String voltage must stay within the 90–450 VDC MPPT range and below the 500 VDC maximum open-circuit voltage at your site's coldest temperature.
May be required
- Disconnects and breakers: The SUNON12 has integrated breakers for several circuits, but local code may still require external DC and AC disconnects.
- Generator: A generator can charge the batteries and run the loads through the AC input.
- PV cables: Extension cables carry power from the array to the inverter. Check connector types.
Optional upgrades
- Additional SUNON12 units: RUiXU lists 1–6 units in parallel.
Check current manufacturer documentation before combining components, especially batteries, inverters, communications equipment and system-control hardware.
Important Considerations
- Indoor only. RUiXU rates the enclosure IP20 for indoor use. Install it in a dry, ventilated space, and expect output to derate above 45°C.
- Off-grid, not grid-tie. RUiXU describes the SUNON series as off-grid inverters. Do not plan on exporting solar power to the utility with it.
- Generator overload rating. RUiXU's datasheet and dealer page give different generator-input overload currents, so confirm the generator input limit in RUiXU's manual before sizing a generator.
- Split-phase setup. Wire and configure 120/240 V output as RUiXU's manual describes, and check that the input voltage range suits your generator or grid supply.
- Battery settings. With closed-loop communication, set the battery type and protocol in both the battery and the inverter as the battery maker's manual describes. With lead-acid or user-defined batteries, set the charge voltages from the battery maker's data.
- Professional installation. Battery-based systems involve high DC currents. Have a qualified installer design and install the system under local electrical codes.