EG4 18kPV Off-Grid Elite Kit – Stackable Power with BigBattery ETHOS
The EG4 18kPV Off-Grid Elite Kit – Stackable Power with BigBattery ETHOS is a high-capacity, modular energy system built for full-home power, resilient backup, and total off-grid independence. Anchored by the powerful 12kW EG4 18kPV hybrid inverter and paired with BigBattery's scalable ETHOS LiFePO₄ battery modules, this kit is designed for serious power demands. With flexible solar add-on options and expandable storage up to 30.7kWh, this kit adapts to your lifestyle, your usage, and your future energy goals.
EG4 18kPV ETHOS Power Kit Features
12kW EG4 Hybrid Inverter
Delivers 12,000W continuous output and supports solar, grid, or generator input with built-in MPPT charge controllers and seamless source switching.
Modular ETHOS Battery System
Choose from 10.2kWh to 30.7kWh of stackable LiFePO₄ storage using BigBattery ETHOS 48V modules—built for scalability, safety, and long runtimes.
Optional High-Efficiency Solar Panels
Add 10, 20, or 32 SunGold Power 415W panels to scale your solar generation up to 13.28kW, ideal for full-time off-grid setups or grid-offset usage.
Simple Integration
Pre-configured hybrid inverter and modular battery units allow for streamlined setup and future expandability—perfect for new builds or system upgrades.
Intelligent Monitoring
LCD interface and mobile app deliver real-time performance data, fault alerts, and energy flow control at your fingertips.
EG4 18kPV ETHOS Power Kit Applications
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Off-grid homes – reliable whole-home power for rural or remote living
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Battery backup for grid-tied properties – seamless backup when the grid goes down
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Remote job sites – power for trailers, tools, and field operations
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Sustainable living setups – ideal for cabins, ranches, or solar-first builds
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Mobile power banks – deployable modular stack supports trailers and shelters
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Large-load solar arrays – expand solar from basic coverage to complete autonomy
What’s Included?
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Inverter
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Battery Options (choose one):
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2-Module BigBattery ETHOS – 10.2kWh
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3-Module BigBattery ETHOS – 15.3kWh
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4-Module BigBattery ETHOS – 20.4kWh
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6-Module BigBattery ETHOS – 30.7kWh
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Solar Panel Options (optional):
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10× SunGold Power 415W Mono Black PERC
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20× SunGold Power 415W Mono Black PERC
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32× SunGold Power 415W Mono Black PERC
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Mounting Options (optional):
EG4 18kPV-12LV All-In-One Hybrid Inverter Specification
| Specification |
Details |
| AC Output |
12kW Continuous |
| PV Input |
18kW |
| MPPTs |
3 (600VDC max input each) |
| Parallel Capability |
Up to 10 units (Total 120kW) |
| DC Input Voltage Range |
100–600 VDC |
| Dimensions (L×W×H) |
34.3 × 20.5 × 11.2 in (87 × 52 × 28.5 cm) |
| Weight |
121.25 lbs (55 kg) |
| Warranty |
10 Years |
| Proposition 65 Warning |
California Proposition 65 Compliant |
BigBattery ETHOS Control Box Specifications
| Category |
Specifications |
| SKU |
CNT060 |
| Operating Voltage Range: |
30 - 60V |
| Max Continuous Discharge Current: |
200A |
| Max Charge Current: |
200A |
| Charge Temperature Range: |
-4°F - 122°F (-20°C - 50°C) |
| Discharge Temperature Range: |
-4°F - 122°F (-20°C - 50°C) |
| Optimal Discharge Temperature Range: |
-4°F - 122°F (-20°C - 50°C) |
| Weight |
22 lb (10 kg) |
| Depth |
6.7 in (170 mm) |
| Width |
26.5 in (674 mm) |
| Height: |
26.5 in (674 mm) |
| Max Connections: |
Up to (16) parallel connections per control box |
| Communications |
CANBus / RS485 |
BigBattery 48V ETHOS 5.12kWh Stackable Battery Module Specifications
| Category |
Specifications |
| SKU |
FETHS-48051-G1 |
| UPC |
850061252067 |
| System Voltage: |
48V |
| Nominal Voltage: |
51.2V |
| Chemistry: |
LiFePO4 |
| kWh Capacity: |
5.12kWh |
| Ah Capacity: |
100Ah |
| Charging Voltage Range: |
55.6 - 57V |
| Max Charge Voltage: |
57V |
| Operating Voltage Range: |
48 – 57V |
| Suggested Low Voltage Cutoff: |
48 – 50.8V |
| Cell Configuration: |
16S |
| Max Continuous Discharge Current: |
100A |
| Max Continuous Power: |
5120W |
| Max Discharge Peak Current: |
150A (Max 5 seconds) |
| Max Charge Current: |
100A |
| Charge Temperature Range: |
32°F - 113°F (0°C - 45°C) |
| Discharge Temperature Range: |
-4°F - 140°F (-20°C - 60°C) |
| Optimal Discharge Temperature Range: |
59°F - 95°F (15°C - 35°C) |
| Storage Temperature Range: |
-4°F - 113°F (-20°C - 45°C) (Max 6 months) |
| Depth |
6.7 in (170 mm) |
| Width |
26.5 in (674 mm) |
| Height: |
16.5 in (419 mm) |
| Max Connections: |
Up to (16) parallel connections per control box |
| Protection Rating: |
IP65 |
| Communications: |
CANBus / RS485 |
| Certifications |
UL9540a, UL1973, & UN38.3 |
SunGold Power 415W Mono Black PERC Panel Specifications
| Category |
Specification |
| Peak Power (Pmax) |
415W |
| Production Tolerance |
±3% |
| Maximum Power Current (Imp) |
13.13 A |
| Maximum Power Voltage (Vmp) |
31.6V |
| Short Circuit Current (Isc) |
14.02A |
| Open Circuit Voltage (Voc) |
37.50V |
| Maximum System Voltage |
1500V |
| Wind Resistance |
2400Pa |
| Output Cables |
12 AWG (1 ft per cable) |
| Number of Cells |
108(6*18) |
| Cell Type |
Mono 182*91mm |
| Certifications |
UL 61730 CE TUV |
| Product Weight |
45.8lbs |
| Product Dimension |
67.8*44.6*1.4inch |
| Package Weight |
100.5lbs（2PCS） |
Frequently-Asked Questions
Is this kit suitable for full off-grid living?
Yes. With up to 30.7kWh of storage and 12kW inverter output, this system can power full homes off-grid with solar or generator support.
Can I expand the battery system later?
Yes. BigBattery ETHOS modules are stackable and designed for future expansion as your storage needs grow.
What’s the best solar configuration for daily self-sufficiency?
The 32-panel option (13.28kW) is recommended for large homes or consistent year-round generation. Smaller arrays work great for supplemental or seasonal loads.
Is the kit pre-wired?
Some components are plug-and-play, but professional installation is highly recommended to ensure code compliance and proper operation.
Manual
