15KW Complete Offgrid Solar Kit + EG4 18kPV + 2x 14.3KW 48V EG4 Lithium Indoor Wall Battery + 15.4KW Solar with Roof Mounting Rails and Wiring

The 15KW Complete Offgrid Solar Kit + EG4 18kPV + 2x 14.3KW 48V EG4 Lithium Indoor Wall Battery + 15.4KW Solar with Roof Mounting Rails and Wiring delivers everything needed for a robust off-grid home power system. This package includes a 15.4kW bifacial solar array, the EG4 18kPV split-phase hybrid inverter/charger, and 28.6kWh of usable lithium storage via two EG4 14.3kWh 48V wall batteries.

The solar array produces approximately 69,300 watts per day based on 4.5 peak sun hours and is ideal for mid-sized homes consuming around 2,000 kWh monthly. The system is fully expandable, allowing future additions of solar panels or batteries as needs grow.

Specifications

• Solar Array: 28 × 550W bifacial double-glass panels (15,400W total)

• Inverter/Charger: EG4 18kPV — 48V split-phase, hybrid inverter/charger

• Battery Storage: (2) × 14.3kWh EG4 Lithium Indoor Wall Batteries (28.6kWh usable)

• Roof Mount System: Complete IronRidge rail kit with splices, legs, fasteners, and bolts

• Balance of System: Solar combiner box, gutter box, 500' 10AWG PV wire, 100' 6AWG AC wiring, Anderson battery cable set, MC4 crimp kit, installation manual

Features

• Bifacial Solar Panels: Up to 25% additional backside energy harvest; improved low-light production (cloudy, hazy, early morning)

• High Durability: Rated for 5400Pa snow load & 2400Pa wind load with a 30-year power warranty

• Application Ready: Suitable for cabins, RVs, garages, pole barns, and full off-grid homes

• Appliance Support: Runs wells, washers, fans, TVs, lighting, refrigerators, freezers, electronics, and smaller AC systems

• Expandable System: Add more panels or batteries at any time; inverter and combiner support future growth

• DIY Friendly: Homeowners with basic wiring knowledge can install; roof-mount racking is typically the most labor-intensive step

Maintenance

• Daily: Monitor inverter & battery status; keep panels clear of debris

• Weekly: Inspect wiring, roof mounts, and verify power production aligns with expected sun hours

• Annually: Check mount hardware torque, clean panels thoroughly, and inspect electrical connections

Warranty

• Solar Panels: 30-year power warranty

• Inverter & Batteries: Covered under EG4 manufacturer warranty