Your Sunnova solar or solar + battery system is grid-tied, which means it is connected to the electric grid. A solar-only system cannot operate independently of the electric grid and will shut down when the grid isn’t working. This means you won’t have power at all for your home during a grid outage.
This is to keep the line workers safe when doing repair work on the grid since there can’t be any live power flowing through the lines. To prevent any energy being exported to the grid, solar-only systems can’t produce any energy.
Unlike solar-only systems, a solar + battery system will continue producing and storing energy during a power outage, when the electric grid is down, so you can keep your most needed lights and appliances on1.
Interested in battery storage? If you're new to solar, visit our Sunnova SunSafe® page to learn more about our solar + battery technology. If you already have solar, with Sunnova +SunSafe®, we can add a battery to your existing solar system.
1. The amount of power available from the battery during a power outage is limited, depending on the loads connected, customer usage and battery configuration (i.e. batteries in certain areas may be set up to provide you with the best economic benefit, which may affect the amount of back-up power available). Solar systems and/or batteries may require repairs after weather events and such repairs may be delayed due to forces outside of our control. No assurances can be given that the solar system or the battery will always work. You should never rely upon either of these to power life support or other medical devices.