Sol-Ark 12K-2P 48V Hybrid Inverter, 120/240V Split-Phase
SKU12K-2P
The Sol-Ark 12K-2P is a 48 V hybrid inverter for homes. One outdoor-rated unit combines solar charging (two MPPTs), a battery inverter/charger, grid connection, backup transfer and a generator input. Sol-Ark's datasheet rates it at 9,000 W continuous AC output plus up...
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Product Overview
The Sol-Ark 12K-2P is a 48 V hybrid inverter for homes. One outdoor-rated unit combines solar charging (two MPPTs), a battery inverter/charger, grid connection, backup transfer and a generator input. Sol-Ark's datasheet rates it at 9,000 W continuous AC output plus up to 3,000 W of extra solar charging into the battery, which Sol-Ark counts as 12 kW of total PV use.
Sol-Ark describes these as 48 V low-voltage hybrid inverters: the battery bank is a 48 V-class system, not a high-voltage battery. Sol-Ark describes them for grid-tied, backup and off-grid use, with automatic generator start.
Sol-Ark lists 120/240 V split-phase, 120/208 V and 220 V grid voltages for this model. Its backup transfer time is listed at 4 ms, so connected loads switch to battery power almost instantly when the grid drops.
Best For
- Homes on 120/240 V split-phase service that want solar, a 48 V battery and backup in one unit: Sol-Ark rates it at 9,000 W continuous AC.
- Mid-size arrays: Sol-Ark lists 12,000 W of maximum usable PV power across two MPPTs, plus up to 9,600 W of AC-coupled solar.
- Off-grid or generator-backed homes: Off-grid operation and automatic generator start are built in.
Key Features & Specifications
| Specification | Details |
|---|---|
| Product type | 48 V low-voltage hybrid inverter (grid-tied, backup and off-grid operation); outdoor-rated |
| Model | 12K-2P (Sol-Ark datasheet SK150-0003 Rev 3 lists this SKU) |
| AC output | 9,000 W continuous; 37.5 A maximum output current |
| Peak apparent power (off-grid) | 16,000 VA for 10 s; 25,000 VA for 100 ms (at 240 V) |
| Grid voltage | 120/240 V, 120/208 V or 220 V |
| Backup transfer time | 4 ms |
| PV input | 2 MPPTs, 2 strings each; maximum usable PV power 12,000 W; maximum allowed PV power 13,000 W |
| MPPT range; start-up voltage; maximum DC input | 150–500 V (rated 175–425 V); 125 V; 500 V |
| Maximum input current per MPPT | 20 A |
| Maximum AC-coupled input | 9,600 W |
| Battery | 48 V nominal (43–63 V); 185 A maximum charge/discharge current; CANBus and RS485 communication; battery temperature sensor included |
| Efficiency | CEC 96.5%; maximum 97.5% |
| Parallel | Up to 9 units |
| Built-in protection | PV DC disconnect, ground fault detection, PV arc fault detection, rapid shutdown control, 250 A battery breaker |
| Generator | Automatic generator start (2-wire), integrated |
| Monitoring | Wi-Fi and LAN hardware included |
| Enclosure; temperature | IP65 / NEMA 3R; −25°C to 55°C |
| Dimensions; weight | 750 × 450 × 254 mm (29.5 × 17.7 × 10 in); 35.4 kg (78 lb) |
| Certifications (per Sol-Ark) | UL 1741 SB, UL 1741 SA11, UL 1741 CRD-PCS, IEEE 1547.1-2020, UL 1699B, UL 1998, CSA C22.2 107.1-16 |
| Warranty (per Sol-Ark) | 10 years standard |
| Source | Sol-Ark datasheet SK150-0003 Rev 3 ("Limitless 12K-LV, SKU: 12K-2P"); Sol-Ark's Low Voltage Battery Integration Guide (TB-00012 Rev. 7, effective March 24, 2026) |
What You May Also Need
Usually required
- A 48 V battery bank with closed-loop communication: The battery must fit the inverter's 48 V battery range. Sol-Ark's Low Voltage Battery Integration Guide (TB-00012 Rev. 7, effective March 24, 2026) lists the batteries Sol-Ark has certified, and covers the 18K, 15K and 12K outdoor inverters. One battery on that list is the Briggs & Stratton SimpliPHI 6.6, which connects through a 6.6/Sol-Ark crossover cable to the inverter's CAN port. The guide also connects the battery controller's RS485 port to an EnergyTrak gateway; with more than one stack, the stacks are daisy-chained and the last one connects to the gateway. Sol-Ark says its warranty does not cover damage caused by a battery that is not listed in the guide.
- Battery cables and DC overcurrent protection: Size the cables and fusing for the battery current in the table above, following Sol-Ark's and the battery maker's manuals.
- Solar panels wired in strings: String voltage must stay within the MPPT range and below the maximum DC input voltage at your site's coldest temperature.
May be required
- Disconnects and breakers: Your installation may need additional AC disconnects or breakers depending on whether you back up the whole home or selected loads.
- Module-level rapid shutdown devices: Rooftop arrays generally must meet NEC 690.12. The inverter provides rapid shutdown control; choose module-level devices that Sol-Ark lists as compatible in its current documents.
- A backup loads panel: Needed when you back up selected circuits rather than the whole home.
Optional upgrades
- Generator: Connects to the inverter's generator (GEN) input; Sol-Ark lists automatic generator start for this model.
- Additional 12K-2P units: Sol-Ark lists up to 9 units in parallel for larger systems.
Check current manufacturer documentation before combining components, especially batteries, inverters, communications equipment and system-control hardware.
Important Considerations
- Battery chemistry. Sol-Ark's current 12K-2P datasheet (Rev 3) lists lithium battery technology only. Check Sol-Ark's manual before planning a lead-acid bank.
- Grid passthrough rating. Sol-Ark's datasheet and product page give different grid passthrough figures for this model, so confirm the passthrough current in Sol-Ark's installation manual before sizing a whole-home backup design.
- Check string voltage in cold weather. Keep each string's cold-weather Voc below 500 V and its current within 20 A per MPPT.
- Battery firmware and settings. For reliable CANbus communication, Sol-Ark's battery integration guide (TB-00012 Rev. 7) says to update the inverter to firmware version C 1.4.5.2 or greater, and to program the inverter with the battery's charge and discharge settings.
- Professional installation. These inverters connect to the utility grid, batteries and the home's main panel. They should be installed by qualified installers under local electrical codes, with utility interconnection approval for grid-tied operation.