Adding a home battery to your solar system gives you backup power during outages and lets you store your own solar instead of selling it cheaply to the grid. But it adds cost. Here is when a battery is worth it in 2026, and when it is not.
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What a Battery Does
- Backup power during grid outages (the panels alone shut off in an outage for safety; a battery keeps your home running).
- Stores your own solar to use at night instead of buying from the grid.
- Maximizes savings in states where exported solar earns a low credit (like California's NEM 3.0).
What It Costs
A home battery typically adds $10,000 to $20,000 before incentives, depending on size. The good news: the 30% federal tax credit also applies to battery storage, which cuts the net cost significantly.
A Battery Is Worth It If...
- You live somewhere with frequent power outages and want backup.
- Your state credits exported solar at a low rate (a battery captures that value instead).
- You have time-of-use electricity rates and can shift battery power to expensive peak hours.
A Battery May Not Be Worth It If...
- Your state still offers full retail net metering (the grid already acts as your "battery").
- You rarely lose power and only care about bill savings.
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FAQ
Does the tax credit cover a battery?
Yes. The 30% federal credit applies to battery storage paired with solar, lowering the net cost.
Do I need a battery to go solar?
No. Many homeowners go solar without one. A battery is most valuable for backup power or in states with low export credits.
Related
General 2026 guidance, not financial advice.