25KW Complete Offgrid Solar Kit + EG4 FlexBOSS21 + 2x 14.3KW 48V EG4 Lithium Indoor Wall Battery + 26.4KW Solar with Roof Mounting Rails and Wiring

The 25KW Complete Offgrid Solar Kit + EG4 FlexBOSS21 + 2x 14.3KW 48V EG4 Lithium Indoor Wall Battery + 26.4KW Solar with Roof Mounting Rails and Wiring is engineered for full home off-grid power. Featuring (2×) EG4 FlexBOSS21 hybrid inverters, a 28,600W usable lithium battery bank, and a high-output 26.4KW bifacial solar array, this system provides approximately 118,800 watts of daily production under 4.5 sun-hours. Ideal for large homes using around 3,500 kWh/month, this kit includes everything needed for installation and is fully expandable for future panel or battery upgrades.

Specifications

• Solar Array: 48 × 550W bifacial mono panels (26,400W total)

• Inverters: 2 × EG4 FlexBOSS21 48V split-phase hybrid inverter/chargers

• Battery Bank: 2 × 14.3KW EG4 Lithium Indoor Wall Batteries (28,600W usable)

• Roof Mount System: Iron Ridge rails, splices, legs, fasteners & mounting hardware

• Balance of System: 2 × combiner boxes, 2 × gutter boxes, Anderson plug battery cables, 500' PV wire, 100' 6 AWG AC cable, 20' 2/0 main line, 2 × AC combiner kits, MC4 crimp kit, installation manual

Features

• Bifacial Double-Glass Panels: Up to 25% rear-side gain; excellent low-light performance (hazy, cloudy, or morning conditions)

• EG4 FlexBOSS21: Flexible split-phase hybrid inverter with MPPT, generator support, AC/DC coupling, and smart controls

• EG4 Lithium Batteries: Reliable indoor wall-mounted batteries engineered for off-grid cycling

• Durability Ratings: 5400 PA snow load / 2400 PA wind load

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

• Expandable System: Add more batteries or panels at any time to scale capacity

Maintenance

• Daily: Check inverter readings and ensure panels are unobstructed

• Weekly: Inspect roof mounts, wiring paths, and battery communication status

• Annually: Clean panels, tighten mounting hardware, inspect wiring, and update firmware

Warranty

• Solar Panels: 30-year performance warranty

• Inverters & Batteries: Manufacturer warranties included