Off-Grid Solar Kit · 12,000W · 30.72kWh · 9,440W PV
12kW Off-Grid Solar System with 30.72kWh of CoreX 5 Pro Storage
A whole-home off-grid kit built around the FR12K-B 12kW split-phase inverter, six CoreX 5 Pro server-rack batteries (30.72kWh) and sixteen 590W bifacial N-type panels (9,440W) – with rapid shutdown, breakers and bus bar included.
FR-12K30CP Overview
The FR-12K30CP pairs Sungold Power’s FR12K-B inverter with a full day and a half of battery storage, making it a strong fit for off-grid homes and cabins that run 240V loads – well pumps, mini-splits, dryers, ranges – and want to keep running through a cloudy stretch. The inverter supplies 12,000W continuous and 24,000W peak on 120/240V split-phase, with a generator input for backup charging.
Six CoreX 5 Pro 5.12kWh batteries stack in a standard 19-inch rack (brackets included) for 30.72kWh at 51.2V. Each module has a 100A smart BMS, EVE Grade A LiFePO4 cells rated for 6,000+ cycles, and CAN/RS485 closed-loop communication with the inverter plus Bluetooth/Wi-Fi monitoring. Sixteen SGN-590-BDG1 bifacial N-type panels deliver 9,440W of PV – about 38kWh a day at four sun hours – across the inverter’s two 6,600W MPPT inputs.
Installation is simplified by the inverter’s built-in PV rapid shutdown and circuit breakers; the kit adds two 50 ft 10 AWG PV extension cables, a 4/0 AWG battery cable, two 25A PV breakers and a 400A bus bar set. A CoreX 5 Elite wall-mounted version (FR-12K30CE) is also available.
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FR-12K30CP Key Features
12kW / 24kW peak inverter
FR12K-B all-in-one: 120/240V split-phase, dual 22A MPPTs (13.2kW PV), 200A charger, 10ms transfer, parallel to 72kW.
30.72kWh rack battery bank
Six CoreX 5 Pro modules with EVE Grade A cells, 100A BMS each, 6,000+ cycles, expandable to 15 units (76.8kWh).
9,440W of bifacial N-type solar
Sixteen 590W dual-glass panels at 22.8% efficiency with 12/30-year warranties.
Rapid shutdown built in
Integrated RSD initiator and breakers help meet NEC 2017/2020 requirements without add-on boxes.
Smart load management
Generator port doubles as a smart-load output to shed non-critical circuits automatically.
Wi-Fi monitoring
Watch solar production, battery state of charge and loads from the SunGoldPower app.
What’s in the Kit
- 1×FR12K-B 12,000W 48V 120/240V all-in-one off-grid inverter
- 6×CoreX 5 Pro 100Ah 51.2V 5.12kWh server-rack LiFePO4 batteries
- 16×SGN-590-BDG1 590W bifacial N-type monocrystalline solar panels
- 6×Battery brackets
- 2×50 ft 10 AWG solar extension cables (inverter PV input)
- 1×4/0 AWG battery cable
- 2×25A PV breakers
- 1×400A bus bar set
What 30.72kWh of storage can run
Estimates assume 85% usable energy and typical load ratings; actual runtime depends on your appliances, weather and settings.
FR-12K30CP Common Questions
What is the difference between FR-12K30CP and FR-12K30CE?
CP uses six CoreX 5 Pro server-rack batteries (brackets included); CE uses six CoreX 5 Elite wall-mounted batteries. Capacity is 30.72kWh either way.
Can I add more panels later?
Yes – the FR12K-B accepts up to 13,200W of PV (6,600W per MPPT), so there is room for about 3.7kW more.
Does it work with a generator?
Yes. The AC input takes generator power at 90-140Vac and charges the batteries at up to 120A, with auto generator start support.
Does the kit ship free?
Yes – free shipping within the contiguous USA (freight delivery for kits), $0 sales tax in most states.
FR-12K30CP Specifications
FR12K-B 12kW All-in-One Off-Grid Inverter
| Inverter Output | |
| Rated output power | 12,000W |
| Peak power | 24,000W |
| Output voltage | 120/240Vac single-phase / split-phase |
| Load motor capacity | 6HP |
| Frequency | 50/60Hz |
| Output waveform | Pure sine wave |
| Switching time | 10ms (typical) |
| Parallel units | Up to 6 (72kW) |
| Battery | |
| Battery type | Lithium-ion / lead-acid / user-defined |
| Rated battery voltage | 48Vdc |
| Voltage range | 40-60Vdc |
| Max PV charging current | 200A |
| Max grid/generator charging current | 120A |
| Max hybrid charging current | 200A |
| PV Input | |
| MPPT trackers | 2 |
| Max PV input power | 6,600W + 6,600W (13,200W) |
| Max input current | 22A / 22A |
| Max open-circuit voltage | 500Vdc |
| MPPT operating range | 125-425Vdc |
| MPPT tracking efficiency | 99.9% |
| Battery-to-AC efficiency | 92% |
| Grid / Generator Input | |
| Input voltage range | 90-140Vac |
| Input frequency | 50/60Hz |
| Bypass overload current | 63A |
| General | |
| Dimensions | 28.48 x 17.64 x 5.91 in (723 x 448 x 150 mm) |
| Weight | 61.73 lb (28 kg) |
| Protection | IP20, indoor use |
| Ambient temperature | 14-131°F (derated above 113°F) |
| Noise | <60dB |
| Cooling | Intelligent fan |
| Communication | RS485 / CAN / USB / dry contact; Wi-Fi / GPRS optional |
| Safety | IEC62109-1, IEC62109-2, UL1741 |
| EMC | EN61000-6-1, EN61000-6-3, FCC 15 Class B |
| Warranty | 2 years |
CoreX 5 Pro 5.12kWh Server Rack LiFePO4 Battery
| Battery | |
| Nominal voltage | 51.2V |
| Nominal capacity | 100Ah |
| Energy | 5.12kWh |
| Cell type | EVE Grade A LiFePO4 |
| Voltage range | 43.2-56.8V |
| Charging current limit | 50A |
| Max continuous charge current | 95A |
| Max discharge current | 100A (100A smart BMS) |
| Cycle life | 6,000+ cycles |
| Communication | CAN / RS485; Bluetooth and Wi-Fi monitoring |
| Parallel | Up to 15 units (76.8kWh) |
| General | |
| Recommended operating temperature | 50-113°F |
| Dimensions | 20.80 x 17.64 x 5.91 in (3U rack) |
| Weight | 94.8 lb |
| Warranty | 10 years |
SGN-590-BDG1 590W Bifacial N-Type Solar Panel
| Electrical | |
| Peak power | 590W (power tolerance 0/+5W) |
| Cell type | N-type monocrystalline, 144 cells (2 x 72) |
| Module efficiency | 22.8% |
| Bifaciality | 80% ±10% |
| Max power voltage (Vmp) | 44.40V |
| Max power current (Imp) | 13.29A |
| Open-circuit voltage (Voc) | 52.35V |
| Short-circuit current (Isc) | 13.90A |
| Mechanical | |
| Dimensions | 89.69 x 44.65 x 1.38 in |
| Weight | 69.45 lb |
| Construction | Bifacial dual-glass |
| Operating temperature | -40 to 185°F |
| Certifications | UL61730, CEC listed |
| Warranty | 12 years materials and workmanship, 30 years performance |
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