In 2025, a 7 kW solar panel system costs around $18,060 before incentives, based on real installation data from across the country. But your actual price will depend on factors like your roof's complexity, local labor costs, the equipment you choose, and what incentives are. . A 7 kW solar panel system is enough to power a small home—but it'll cost you about $18,060. Why trust EnergySage? As subject matter experts, we provide only objective information. We design every article to provide you with deeply-researched, factual, useful information so that you can make. . This high-power, low cost solar energy system generates 7,150 watts (7 kW) of grid-tied electricity with (13) 550 watt Axitec XXL bi-facial model AC-550MBT/144V, SMA Sunny Boy Smart Energy inverter, Sunny Portal 24/7 monitoring, disconnect box, rooftop. 2kW solar kit Canadian 450 TOPcon black. . At A1 SolarStore you can order a complete solar system where all the parts fit together well. It should be able to cover up to 100% of your energy needs, especially in a sunny place. The modules occupy 414 square feet of space, but they. . A 7kW solar array can produce 21 to 49 kWh of power in one day, so it can deliver what's needed to most homes, even those with higher-than-average electricity consumption. But how much does such a system cost? Is the initial investment worth the savings you will make on your utility bills? At first. .