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Sol-Ark 18K-2P-N Specifications
| Model | 18K-2P-N (Limitless 18K-2P-LV) |
| Continuous Power Output | 18,000W (18kW) |
| Surge Power (10s) | 36,000W (36kVA) |
| MPPT Channels | 3 independent MPPTs / 6 inputs |
| Max Supported PV Power | 32,400W DC (40kW+ with AC coupling) |
| Max Input Current per MPPT | 36A (54A short circuit) |
| Output Voltage | 120/240V; 208V split-phase |
| Max Grid Pass-Through Current | 200A |
| Battery Nominal Voltage | 48V (41-63V operating range) |
| Battery Charge/Discharge Current | 350A continuous |
| Ingress Protection | IP65 / NEMA 3R |
| Dimensions | 33.98 × 18.27 × 11.10 inches |
| Weight | 137 lb (62.14 kg) |
| Warranty | 10 Years Standard |
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Sol-Ark 18K-2P-N 18kW Hybrid Inverter
SKU SOL-ARK-18K-2P-N-HYB-INV
The Sol-Ark 18K-2P-N 18kW Hybrid Inverter
The Sol-Ark 18K-2P-N hybrid inverter delivers 18kW of continuous power from battery storage with 36kVA surge capacity for 10 seconds, engineered specifically for demanding off-grid installations and critical backup applications. This residential hybrid inverter features three independent MPPT channels supporting up to 32.4kW of DC solar input, with additional capacity for over 40kW total PV when utilizing AC coupling functionality. The unit incorporates a 350A battery charge/discharge controller with dual 48V battery ports, 200A grid pass-through capability, and automatic 5ms transfer time for seamless grid-to-battery transitions.
Advanced power management capabilities include multi-season time-of-day programming, dedicated generator input port with auto-start functionality, and Virtual Power Plant (VPP) ready communication protocols. The 18K-2P-N operates across an MPPT voltage range of 150-425V with 36A maximum current per MPPT channel, achieving 97.6% peak efficiency.
18K-2P-N 18kW Hybrid Inverter Features
- Maximum Backup Power Delivery: 18kW continuous power output directly from battery storage ensures operation of multiple high-draw appliances simultaneously, including central HVAC, electric ranges, and power tools during grid outages
- High Surge Capacity: 36kVA surge power for 10 seconds provides locked rotor amp capability to start air conditioning compressors, well pumps, and other motor loads without supplemental soft-start equipment
- Unmatched Solar Input Capacity: Support for over 40kW of total photovoltaic input maximizes energy harvest in off-grid applications and accelerates battery recharge during partial sun conditions
- 200A Whole-Home Pass-Through: Full-rated grid pass-through capability with automatic transfer eliminates the need for separate transfer switches and supports complete home electrical panels
- Scalable Power Architecture: Stackable design supports up to 12 units for installations requiring 200kW+ capacity, ideal for large homes, multi-family units, or light commercial applications
Sol-Ark 18K-2P-N Hybrid Inverter Certifications
The Sol-Ark 18K-2P-N meets comprehensive North American grid interconnection and safety standards for residential and commercial deployment.
- UL1741 Supplement B & CRD-PCS
- IEEE 1547-2018
- IEEE 2030.5
- UL1699B
- UL1998
- CSA C22.2 No. 107
- NEC 690.5 Ground Fault Detection
Sol-Ark 18K-2P-N Technical Analysis and Review
The Sol-Ark 18K-2P-N addresses the growing demand for high-power residential energy storage systems capable of supporting fully electrified homes without grid dependency. With 18kW continuous output and 36kVA surge capacity, this inverter handles simultaneous operation of central air conditioning, electric cooking appliances, well pumps, and Level 2 EV charging without load shedding or generator support. The three independent MPPT channels with 36A current capacity per string accommodate modern high-current solar panels while maintaining voltage flexibility across the 150-425V operating range. Support for over 40kW of total PV input through combined DC and AC coupling ensures rapid battery recharge even during winter months or partial shading conditions.
Battery integration capabilities distinguish this inverter in the residential market. The 350A charge/discharge current rating supports large lithium battery banks in the 30-50kWh range, providing multi-day autonomy for off-grid installations or extended backup duration for grid-tied systems. Dual 48V battery ports with CANBus and RS485 MODBUS communication support major lithium battery manufacturers while maintaining compatibility with lead-acid banks for budget-conscious installations. The IP65/NEMA 3R enclosure rating enables outdoor mounting adjacent to battery enclosures, reducing indoor space requirements and improving thermal management.
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