Is a solar battery worth it?

What a battery actually does

• Backup power: when the grid goes down, a battery keeps essential circuits running. Most solar systems without a battery shut off in an outage for safety, so this is often the real reason people buy one.
• Self-use after dark: it stores the solar you make midday and lets you use it in the evening, instead of exporting it to the grid and buying it back.
• Bill management: where the utility charges more at peak hours, a battery can shift your usage off the expensive window.

What it costs in 2026

A typical single home battery runs roughly $9,000 to $18,000 installed, which works out to about $800 to $1,200 per usable kilowatt-hour of storage. A battery adds on the order of half again to the cost of a panel-only project. The big change this year: the 30% Residential Clean Energy Credit that applied to battery storage expired at the end of 2025, so a 2026 buyer carries the full price. Some state and utility programs still offer storage incentives, so it is worth checking before you assume there is no help.

When a battery is worth it

• Frequent or costly outages: if your area loses power often, or an outage is expensive or dangerous for you, backup is a real benefit that a payback calculation alone misses.
• Weak export credit: where your utility has cut net metering and pays little for exported solar, storing and using your own power beats selling it cheap.
• Time-of-use rates: if you pay much more for electricity at peak hours, shifting that usage with a battery saves more.

When to skip it, for now

If your grid is reliable, your utility still offers strong net metering, and your goal is the shortest payback, panels alone usually make more financial sense than panels plus a battery. Batteries can also be added later, so a common approach is to size the wiring for storage now and add the battery when prices fall, an outage scare changes your mind, or your utility changes its export rules.