Most homeowners spend between $12,600 and $33,376 to install a complete residential solar system in 2026, with the national average at $19,873 before incentives. Check each product page for other buying options. Need help? Discover the powerful and affordable off-grid power solution you've been searching for with our complete off-grid solar kits. These all-in-one plug-and-play solar kits have the ability to hook up to solar panels, fuel/backup generator and/or utility power - So whether you're looking to run your RV. Sigenergy SigenStor is an advanced all-in-one residential energy management system that unifies the solar inverter, EMS, battery modules, and optional EV DC charger into one seamless solution. Anything you can do to lower the cost goes a long way to making it easier to take the leap and start paying your utility company less money each month. Your actual cost depends on your home's energy needs, roof characteristics, location and other factors, all of which we'll break down in.