Compare price and performance of the Top Brands to find the best 250 kW solar system. For business or utility, save 30% with a solar tax credit. . This high-power, low cost solar energy system generates 250,160 watts (250 kW) of grid-tied electricity with (424) 590 watt Axitec XXL bi-facial model PS590M8GF-24/TNH, SMA Sunny High-power three-phase inverter (s), DC string combiners, 24/7 monitoring,. Shop. . Off-grid solar systems typically cost between $45,000-$65,000 for a complete home setup, significantly more than grid-tied systems that average $15,000-$20,000. Each of our solar panel kits is built to support a complete off-grid solar system, making it. . To make our picks for this article, we looked at our top solar energy companies and highlighted five that are best suited to handle off-grid installations (we also added a company that offers do-it-yourself solar kits).
