The national average cost of an off-grid system is $55,000*, though your investment could range from $20,000 to $100,000 based on your system design and energy needs.
The average cost of solar panels for an on-grid, 5 kilowatt-hour (kWh) system is $15,000–$20,000. An off-grid system costs more than twice as much. Who Should Consider an Off-Grid Solar System? Off-grid systems have many perks, but they aren't suitable for everyone. We'll review some best-case scenarios for moving to an off-grid system.
What is the difference between grid-tied and off-grid solar panels?
Through interconnection, grid-tied solar panels allow you to use the sun's energy whenever possible but always have an electricity supply from your utility company when you need it. On the other hand, off-grid systems are not tied to the grid.
Off-grid solar energy systems are a great option for RVs and properties that are too far from the electric grid for a cost-effective tie-in. They're also helpful for small projects where it's nice to have electricity, but it may not be worthwhile to connect to the grid. Some examples include sheds, detached garages and other outbuildings.
What is an off-grid Solar System?
Off-grid solar systems are an excellent alternative to traditional grid-tied systems that provide complete energy independence. Consider your energy needs and build a system that meets or exceeds those requirements. We recommend including an alternate energy source to support your home during extended periods without direct sunlight.
Although not necessary in all off-grid systems, solar storage solutions are a requirement if you need access to electricity at all times of the day. Some off-grid systems use a charge controller to route the energy collected directly to a device for charging. Charge controllers prevent overcharging when the sunlight on your panels is abundant.
What is the best off-grid solar kit?
The Renogy off-grid solar kit is our favorite overall, and it's the one we feel most comfortable recommending. It includes four 100-watt solar panels for a total output of 400 watts. This means it's ideal for smaller applications, although it can be expanded with additional panels for more power.