25KW Complete Offgrid Solar Kit - 15K Sol-Ark Inverter + 20.48KW OMO Stack Lithium Battery +26.4KW Solar with Mounting Rails and Wiring

The 25KW Complete Offgrid Solar Kit - 15K Sol-Ark Inverter + 20.48KW OMO Stack Lithium Battery +26.4KW Solar with Mounting Rails and Wiring is engineered for complete home energy independence. This high-capacity package includes a powerful 15K Sol-Ark split-phase inverter, a 20.48 kWh heated lithium battery bank, and a 26.4 kW bifacial solar array designed for reliable, long-term production. Generating approximately 118,800 watts per day based on 4.5 hours of peak sunlight, this system is ideal for larger homes consuming around 3,500 kWh per month. Fully expandable, it allows seamless additions of panels or batteries for future growth.

Specifications

• Solar Array: 48 × 550W Bifacial Mono Solar Panels (26,400W total)

• Inverters: 2 × Sol-Ark 15K-2P-N Split-Phase Inverters (Grid-tie or Generator Compatible)

• Battery Bank: 4 × OMO 51.2V 5.12 kWh Heated Stackable Lithium Batteries with Bluetooth (20.48 kWh total)

• Combiner: OMO Stackable Combiner with LCD Readout

• Mounting System: Complete IronRidge Roof Mount Rails, Splices, L-Feet, Fasteners, Bolts

• Base Unit: 1 × OMO Wheeled Base Unit

• Combiner Boxes: 2 × Solar PV Combiner Boxes + AC Combiner Kit

• Cabling: 500’ 10 AWG MC4 Solar Cable, 100’ 6 AWG AC Cable, 20’ 2/0 AC Main Line

• Accessories: MC4 Crimper Tool Set, Wire Gutter Boxes, Installation Manual

Features

• Bifacial Double-Glass Solar Panels: Produce up to 25% extra energy from rear-side reflection; 5400 PA snow load and 2400 PA wind load; 30-year power warranty.

• Sol-Ark 15K Inverter Output: 120/240V split phase; 9kW continuous / 16kW surge (10 seconds).

• Battery Flexibility: Works with both flooded lead-acid and lithium options.

• MPPT Charging: Built-in charge controller with 3× MPPT inputs.

• Smart Interface: LCD touchscreen, WiFi connectivity, DC transformerless design, 97.5% efficiency.

• Durability: NEMA 3R outdoor-rated enclosure.

• Scalable Design: Parallel stacking of up to 8 units.

• Fast Transfer: 4ms switch time between grid and battery backup.

Suitable For

• Applications: Small homes, off-grid cabins, RVs, garages, pole barns.

• Appliances Supported: Well pumps, washing machines, fans, TVs, lights, refrigerators, freezers, computers, tablets, and small AC units.

Energy Production

• Daily Output: Approximately 118,800 watts/day based on 4.5 hours of peak sun.

• Monthly Compatibility: Ideal for homes using ~3,500 kWh/month.

• Regional Sunlight Variation: Less production in the Northeast; more in the Southwest.

Installation

• DIY Friendly: Installable by homeowners with basic wiring knowledge.

• Electrician Recommended: Required if you are not familiar with wiring.

• Most Labor-Intensive Step: Roof-mount racking installation.

Warranty

• Inverter: 10 years

• Solar Panels: 30-year power warranty