The Sol-Ark Premium 18K-2P is Sol-Ark's most powerful 48V residential hybrid inverter, delivering a full 18,000W continuously from battery storage. It's built for large homes, shops, farms and off-grid properties with demanding loads, with 36kVA of surge to start central HVAC systems and motors during a grid outage.
Like every Sol-Ark hybrid, it combines the solar inverter, MPPT charge controllers, 48V battery inverter/charger and automatic transfer switch in one outdoor-rated enclosure. It runs on-grid, off-grid or as backup, and Sol-Ark notes it uses American-engineered firmware with data kept in the U.S.
Highlights
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18,000W continuous output from batteries at 120/240V (75A)
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36,000W surge for 10 seconds for HVAC, well pumps and motors
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28,800W of usable solar on 3 full-size 36A MPPTs with 6 DC solar ports, and over 40kW of PV with AC coupling
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200A grid pass-through for whole-home backup
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350A battery charger with two 48V battery ports
- 5ms automatic transfer
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Stackable: up to 12 units in parallel
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IP65 / NEMA 3R outdoor enclosure rated -40°F to 140°F, 10-year standard warranty
Backup Power & Grid Connection
- 200A grid pass-through for whole-home backup installations
- 120/240V split phase or 208V, 60Hz (55–65Hz range), 0.88–1.1 Un voltage window
- Listed to UL 1741 3rd Ed. SB and IEEE 1547-2018 with IEEE 2030.5 interoperability for grid-interactive systems
Solar Input
- Up to 28,800W of usable PV across 3 MPPT trackers, 2 strings per tracker (6 DC solar ports)
- MPPT range 150–425V, 125V start-up, 500V max input
- 36A operating / 54A short-circuit current per MPPT
- Up to 19,200W of AC-coupled input for more than 40kW of total solar
- UL 1699B PV DC arc-fault protection; rapid-shutdown compatible with an external RSD initiator
Battery Compatibility
- 48V nominal (40–60V operating range), 50–9,900Ah bank capacity
- 350A continuous battery current with 2 × 200A battery disconnects
- Closed-loop CANBus and RS485 Modbus BMS communication
- 3-stage charging with equalization; easy to swap in a newer 48V battery later, since batteries typically wear out before the inverter
Sol-Ark lists Briggs & Stratton Energy Solutions, Discover Energy Systems, Pytes USA and Renon Power as certified battery partners, and offers UL 9540 battery upgrade options.
Generator Integration
- Dedicated generator (GEN) input with integrated 2-wire automatic generator start
- Supports a generator or AC-coupled solar input
Monitoring & Smart Energy Control
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Wi-Fi and LAN hardware included for remote monitoring through the MySolArk app and installer platform, hosted on US-based servers
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On-inverter LCD touchscreen for programming without a laptop
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Built-in Time-of-Use (TOU) control with multi-season, day-of-week and time-of-day schedules to store solar and avoid peak-rate grid power
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Virtual Power Plant (VPP) ready for utility demand-response programs
Full Specifications
| PV Input |
|---|
| Max usable PV power |
28,800W |
| MPPT voltage range |
150–425V |
| Start-up voltage |
125V |
| Max DC input voltage |
500V |
| Max operating current per MPPT |
36A |
| Max short-circuit current per MPPT |
54A |
| MPP trackers / strings |
3 trackers, 2 strings each |
| Max AC-coupled input |
19,200W |
| AC Output |
|---|
| Nominal voltage |
120/240V, 208V |
| Voltage range |
0.88–1.1 Un |
| Frequency |
60Hz (55–65Hz) |
| Continuous power |
18,000W |
| Continuous output current |
75A |
| Surge power |
36,000W for 10s |
| Max grid pass-through |
200A |
| Backup transfer time |
5ms |
| Parallel |
Up to 12 units |
| Battery (DC) |
|---|
| Nominal voltage |
48V (40–60V range) |
| Capacity |
50–9,900Ah |
| Continuous battery current |
350A |
| Battery disconnect |
200A per pole, ×2 |
| Charging |
3-stage with equalization |
| Generator auto-start |
2-wire, integrated |
| BMS communication |
CANBus & RS485 Modbus |
| Efficiency |
|---|
| Max efficiency |
97.6% |
| General |
|---|
| Dimensions (H×W×D) |
33.98 × 18.27 × 11.10 in (863 × 464 × 282 mm) |
| Weight |
137 lb (62.4 kg) |
| Enclosure |
IP65 / NEMA 3R |
| Operating temperature |
-40°F to 140°F (-40°C to 60°C), derating above 113°F |
| Max altitude |
9,843 ft (3,000 m) |
| Noise |
<50 dB |
| Communication |
Wi-Fi & LAN hardware included |
| Warranty |
10 years standard |
| Certifications |
|---|
| Listings |
UL 1741 3rd Ed. SB, UL 1741 CRD-PCS, IEEE 1547-2018 (IEEE 2030.5 interoperability), Hawaiian Electric SRD V2.0, UL 1699B PV DC AFCI, UL 1998, CSA C22.2 No. 107 |
Downloads
files/Product-Listings-Featured-Products-1.jpg
files/15K-whole-home.webp
