12KW Complete Offgrid Solar Kit + EG4 FlexBOSS21 + 2x 14.3KW 48V EG4 Lithium Indoor Wall Battery + 13.2KW Solar with Ground Mount and Wiring

The 12KW Complete Offgrid Solar Kit + EG4 FlexBOSS21 + 2x 14.3KW 48V EG4 Lithium Indoor Wall Battery + 13.2KW Solar with Ground Mount and Wiring is engineered for homeowners seeking reliable, expandable off-grid power. This system includes the versatile EG4 FlexBOSS21 hybrid inverter/charger, a powerful 28,600W lithium battery bank, and a 13.2KW bifacial solar array capable of generating approximately 59,400 watts per day based on 4.5 sun hours. Designed for mid-sized homes using about 1700kWh/month, this kit provides long-term flexibility for future panel or battery expansion.

Specifications

• Solar Panels: 24× 550W Bifacial Double-Glass Panels (13,200W Array)

• Inverter: 1× EG4 FlexBOSS21 — 48V Split-Phase Hybrid Inverter/Charger

• Batteries: 2× 14.3KW 48V EG4 Indoor Wall-Mounted Lithium Batteries (28.6KW Total)

• Mounting Hardware: Complete Iron Ridge Ground Mount Rails, Top Caps, Connectors, Fasteners & Bolts

• Electrical Components: Solar Combiner Box, Gutter Box, 500' PV Direct Burial Wire

• Cabling: Anderson Plug Battery Cable Set, 100' AC Input/Output Cabling (6 AWG)

• Tools & Guides: MC4 Crimp Kit, Installation Manual

• Ground Mount System: Built for 3" SCH40 pipe (customer-supplied)

Features

• FlexBOSS21 Hybrid Inverter: Split-phase 120/240V output with hybrid charging capabilities

• Bifacial Solar Output: Up to 25% more rear-side energy gain

• Weather Resilience: 5400 PA Snow Load & 2400 PA Wind Load

• Expandability: Add more panels or batteries anytime

• Durability: Double-glass panel construction with 30-year warranty

• Complete Ground Mount Kit: All rails, hardware, and connectors included

Maintenance

• DIY Friendly: Installable by homeowners with basic wiring skills

• Weekly: Inspect wiring runs, mounting points, and inverter readouts

• Annually: Check all ground mount hardware and clean panel surfaces

System Guidance

• Suitable For: Small cabins, RVs, garages, pole barns, and full off-grid homes

• Can Power: Wells, washers, fans, TVs, lights, refrigerators, freezers, electronics, small AC systems

• Average US Power Use: 877kWh/month — this kit is expandable to match energy needs

• Solar Production: Calculated using ~4.5 peak sun hours (Midwest average)

Warranty

• Solar Panels: 30-Year Power Warranty

• Batteries: EG4 Lithium Manufacturer Warranty

• Inverter: EG4 FlexBOSS21 Warranty