Sol-Ark 18K Hybrid All-in-One Inverter (18K-2P-N)

Product Overview

The Sol-Ark 18K-2P-N (Limitless 18K) is an 18 kW continuous hybrid all-in-one inverter for large residential grid-tied, backup, and off-grid systems. It delivers high continuous and surge power from a 48 V battery bank while accepting substantial DC and AC-coupled PV.

Relative to the 12K and 15K Sol-Ark models, the 18K increases continuous AC to 18,000 W, surge to 36,000 W (10 s), battery current to 350 A, and usable PV to 28.8 kW (32.4 kW supported STC) with three high-current MPPTs.

Best For

• High-demand homes needing 18 kW continuous backup / hybrid output
• Large PV arrays and 200 A grid passthrough whole-home designs
• 48 V lithium (or lead-acid where supported) banks with CANBus / RS485 BMS

Key Features

• 18,000 W continuous; 36,000 W surge for 10 s
• 3 MPPTs / 2 inputs; 36 A operating / 54 A Isc per MPPT
• 350 A continuous battery charge/discharge
• 200 A grid passthrough; GEN port for generator or AC-coupled PV
• Integrated PV DC disconnect, GFP, AFCI, RSD control, 200 A AC breaker
• Stackable up to 12 units; Wi-Fi / LAN monitoring
• IP65 / NEMA 3R enclosure; 10-year standard warranty

Key Specifications

• SKU / model: 18K-2P-N (Limitless 18K-2P-LV)
• AC: 18,000 W continuous; 75 A max output; 120/240 and 120/208 V
• PV: max supported 32,400 W; usable 28,800 W; MPPT 150–425 V rated; max DC 500 V
• AC-coupled / GEN port capability: up to 28,800 W class inputs per current Sol-Ark datasheets (verify revision for your unit)
• Battery: 48 V nominal; ~40–60 V operating (see latest datasheet); 350 A charge/discharge
• Max efficiency 97.6%; CEC ~97.0%
• Dimensions ~34 × 18.2 × 11.1 in; weight ~137 lb
• Certifications include UL 1741 SB / CRD-PCS, IEEE 1547-2018, UL 1699B, CSA C22.2 No. 107

Compatibility / Important Considerations

• Confirm the exact firmware/datasheet revision for AC-coupled and battery voltage limits on the unit you receive.
• Use batteries and RSD devices on Sol-Ark’s current compatibility lists.
• Professional installation required. This is a heavy, high-current appliance — plan mounting, conductors, and disconnects accordingly.