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Three-Phase Off-Grid Inverter · 18,000W · 48V
An 18kW 120/208V three-phase all-in-one solar charge inverter for farms, workshops and light commercial sites - 28.8kW of PV input, dual AC outputs and parallel expansion to 108kW.
The Sungold Power PowerCore 18K-48 is a commercial-grade three-phase off-grid inverter that combines an 18kW pure sine wave inverter, dual MPPT solar charge controllers and a 360A battery charger in one wall-mounted unit. It is built for 120/208V loads that a split-phase inverter cannot serve: commercial kitchens, cold storage and refrigeration, CNC and workshop machinery, irrigation pumps, HVAC and greenhouse equipment.
Two independent MPPT trackers accept up to 14.4kW of solar each (28.8kW total, 600Vdc max), and the 48V battery bus works with SunGoldPower LiFePO4 batteries or lead-acid banks. A 100A continuous grid pass-through and generator input keep the site running through long stretches of poor weather, while the programmable GEN/smart-load port can be set up as either a generator input or a second, non-critical load output.
Need more than 18kW? Up to six PowerCore 18K-48 units run in parallel for 108kW of three-phase output. Four output-priority modes (UTI, SBU, SOL, SUB) and time-of-use scheduling let you decide when solar, battery or grid carries the load.
Browse all Sungold Power products, Sungold solar kits, inverters and batteries.
Rated 18,000W continuous with 2x surge for 10 seconds, pure sine wave, 50/60Hz, on L1+L2+L3+N+PE - the right format for three-phase motors, compressors and commercial equipment.
Two MPPT trackers, 36A each, 120-550Vdc operating window and 600Vdc maximum let you build large strings and harvest up to 14.4kW per tracker.
Charges from PV, grid or generator at up to 360A on a 48V bus, with 3-stage/equalization curves for lead-acid and BMS self-adaption for lithium packs.
A main output for critical loads plus a programmable GEN/smart-load port that separates non-essential circuits or accepts a generator.
Stack up to six units for larger farms, workshops and small commercial facilities without changing the system architecture.
LCD display, RS485/CAN/USB/dry-contact ports, optional Wi-Fi/GPRS/4G module, independent AC and DC breakers and a full protection suite.
No. It outputs 120/208V three-phase (L1+L2+L3+N). For 120/240V split-phase homes, see the Sungold Power FR12K-B or SGS-12K18MAX instead.
Up to 28.8kW across two MPPT inputs (14.4kW each), with a 600Vdc maximum open-circuit voltage and 120-550Vdc MPPT range.
Yes. The AC input accepts grid or generator power (100A continuous pass-through) and charges the battery at up to 360A.
48V lithium batteries with CAN/RS485 communication (SunGoldPower PowerMax, CoreX 5 series) or lead-acid banks using the built-in charge profiles.
PowerCore 18K-48 18kW Three-Phase Solar Charge Inverter
| Inverter Output | |
| Rated output power | 18,000W (19,800VA) |
| Peak power | 2 x rated, 10s |
| Rated AC output current | 50A |
| Output frequency | 50/60Hz |
| Rated output voltage | 120/208Vac (L1+L2+L3+N+PE) |
| Output voltage range | 120/208Vac ±5% |
| Parallel capacity | 1-6 units (up to 108kW) |
| Battery | |
| Battery type | Lithium-ion / lead-acid / user-defined |
| Rated battery voltage | 48Vdc |
| Battery voltage range | 40-60Vdc |
| Max PV charging current | 360A |
| Max grid/generator charging current | 360A |
| Max charge/discharge current | 360A |
| Charging curve | 3 stages / equalization; self-adaption to BMS for lithium |
| PV Input | |
| MPPT trackers | 2 |
| Max PV array power | 14.4kW + 14.4kW (28.8kW) |
| Max input current | 36A + 36A |
| Min PV / start-up voltage | 100Vdc |
| Max PV input voltage | 600Vdc |
| MPPT operating range | 120-550Vdc |
| Grid / Generator Input | |
| Frequency range | 50/60Hz |
| Input voltage | 120/208Vac (L1+L2+L3+N+PE) |
| AC voltage range | Phase 90-140Vac; line 156-242Vac |
| Continuous grid pass-through | 100A |
| General | |
| Dimensions | 23.36 x 33.40 x 8.47 in |
| Weight | 118 lb |
| Protection | IP20, indoor use |
| Operating temperature | 14-131°F (derated above 113°F) |
| Noise | <60dB |
| Cooling | Intelligent air cooling |
| Communication | RS485 / CAN / USB / dry contact; Wi-Fi / GPRS / 4G stick optional |
| Safety | IEC62109-1, IEC62109-2 |
| EMC | EN61000-6-1, EN61000-6-3, FCC 15 Class B |
| Warranty | 2 years |
Free shipping on all orders within the mainland US (Hawaii, Alaska and overseas territories excluded - a freight forwarder is required). Orders ship directly from our brand partners' warehouses across the U.S. Order confirmation is emailed immediately; if an item is unexpectedly backordered we notify you before your card is charged. In-stock items are processed within 1-4 business days (cut-off 4:00 PM EST), transit is 3-6 business days, and tracking is emailed within 24 hours of shipment. Typical delivery is 4-10 business days from purchase. Minimum order value is $69.
You have 30 days from the delivery date to initiate a return (35 days for orders placed Nov 25-30 and Dec 25-31). Items must be unused, in original packaging with tags attached, and returns require prior authorization from our team.
To start a return: +1 (307) 317-7213, hello@ecosolarkits.com, or live chat. Read the full return and refund policy
