How the calculator works
A home battery saves you money by storing your cheap daytime solar (or off-peak power) and using it through the expensive evening peak, instead of buying that energy back from the grid. The calculator estimates your yearly saving from four things: your power use, whether you have solar, the battery size, and your state's rebates.
What changes your real savings
- Your evening usage. The more power you use after dark, the more a battery shifts off the grid.
- Your feed-in tariff. The lower it is, the more you gain by storing solar instead of exporting it.
- Your rebates. The federal discount plus your state incentive set the after-rebate price, which drives payback.
- A VPP. Joining a Virtual Power Plant adds income on top of your bill savings.
For the full picture on pricing, see how much a solar battery costs, and for whether it stacks up for your home, read are solar batteries worth it?