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- 18 kW continuous on-grid and backup output
- 36 kW 10 s surge for motor starts
- 32.4 kW max PV, 3 MPPTs
- 350A 48V battery charge/discharge
- 200A grid pass-through
- IP65 / NEMA 3R, -40 to 60 C operation
- 10-year limited warranty
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Sol-Ark's most powerful residential hybrid inverter. The Limitless 18K delivers 18kW continuous with a 36kW surge for high-demand homes, easily starting HVAC systems, well pumps and motors. It takes up to 32.4kW of PV across three MPPTs, supports DC and AC coupling, and has a 200A grid passthrough, Smart Load control and a 28.8kW GEN port. It's a whole-home PCS platform with no separate MID needed.
Highlights
- 18kW continuous, 36kW surge
- 32.4kW max PV (28.8kW usable)
- 350A battery charge/discharge
- 200A passthrough; 5ms transfer
- Parallel up to 12; VPP-ready energy management
PV input
| Max STC PV / usable MPPT power | 32,400W / 28,800W |
| MPPT operating range | 150–425V |
| Start-up / max input voltage | 125V / 500V |
| MPPTs × strings | 3 × 2; 36A per MPPT (54A Isc) |
AC
| Grid voltage | 120/240V, 120/208V; 50/60Hz |
| Grid real power | 18,000W (240V) |
| Backup continuous | 18,000W @ 240V / 15,600W @ 208V |
| Backup surge (10 s) | 36,000W / 31,200W |
| Grid passthrough | 200A |
| Transfer time | 5ms |
| GEN port | 28,800W, 120A |
| Efficiency | 97.0% CEC / 97.6% max |
Battery & general
| Battery | 48V lead-acid or lithium, 43–59V, 2 inputs, 350A charge/discharge |
| BMS communication | CANbus / RS485 / Modbus RTU |
| Dimensions (H × W × D) | 34 × 19.4 × 12 in |
| Weight | 137 lbs (62.1 kg) |
| Enclosure | IP65 / NEMA 3R; -40 to 140°F |
| Idle draw / noise | 110W / <50dB |
| Communication | 4G / Wi-Fi / LAN |
| Certifications | UL 1741 CRD-Multimode, UL 1741 3rd SB, UL 1741 CRD-PCS, UL 1699B, UL 1998, CSA C22.2 No. 107, IEEE 1547-2018, IEEE 2030.5, HECO SRD 2.0; CEC, SGIP |
| Warranty | 10 years |
| Manufacturer | Sol-Ark |
|---|---|
| Model Number | Limitless 18K-2P-LV |
| Continuous AC Power | 18,000 W grid-tied and backup (120/240V); 15,600 W (120/208V) |
| Peak Surge 10 s | 36,000 W (120/240V) |
| Max STC PV Power | 32,400 W (28,800 W usable) |
| MPPTs / Strings per MPPT | 3 / 2 |
| MPPT Operating Range | 150-425 V (500 V max input) |
| Battery | 48 V nominal, 43-59 V operating |
| Max Charge/Discharge Current | 350 A / 350 A |
| Max Grid Pass-Through | 200 A |
| Efficiency | 97.0% CEC, 97.6% max |
| Enclosure | IP65 / NEMA 3R |
| Operating Temp | -40 to 60 C (derated above 45 C) |
| Certifications | UL 1741 3rd Ed SB, UL 1741 CRD-PCS, UL 1699B, UL 1998, CSA C22.2 No. 107, IEEE 1547-2018 |
| Dimensions | 34 x 19.4 x 12 in (863 x 494 x 306 mm) |
| Weight | 137 lb (62.14 kg) |
| Warranty | 10 years |
Specifications are from the manufacturer and may change. Questions? Call (888) 831-0450.
Sol-Ark 10-Year Limited Warranty (LCD screen and fans 5 years)
| Coverage | defects in materials and workmanship, from later of purchase or receipt date |
|---|---|
| How to claim | support@sol-ark.com or +1-972-575-8875 ext. 2; RMA required |
Download: Sol-Ark 18K-2P Limited Warranty (PO-00020)
Manufacturer warranties are provided by the manufacturer. Keep your invoice as proof of purchase. Questions about a warranty claim? Call (888) 831-0450.