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Timing your home battery purchase can save you $2,000–$5,000 — or cost you the same amount if you get it wrong. Here's the optimal timing framework for 2026.
Buy now if you live in California
California's SGIP equity-tier expansion (announced April 2026) added 7 new high-fire-risk counties to the eligibility map. The program budget is allocated first-come, first-served, and demand typically exhausts the annual budget by Q3. If you're in an equity-tier zip code, apply for SGIP pre-approval NOW — even if you're not ready to install for 6 months. The reservation holds your rebate.
Buy in Q4 (October–December) if you want maximum installer discount
Solar installers slow down in Q4 as winter approaches (in most markets). Many will discount battery installs by 5–15% to hit year-end revenue targets. Combined with the 30% federal credit you can claim immediately on your tax return, Q4 is the cheapest time of year to install.
Wait until 2027 if you live in a state with weak incentives
In states with no state storage rebate (most of the Midwest, Plains, and Mountain West), the math doesn't justify buying today. Wait for either: (a) your state to add a rebate program, (b) battery prices to drop another 10–15% (expected by 2027), or (c) V2H to mature enough to substitute for a stationary battery.
Don't wait for solid-state batteries
Solid-state residential batteries won't reach price parity with LFP before 2030. The 30% federal credit you'd claim today is worth more than any 5–10% energy density improvement from waiting.
For full timing analysis, see our cost and incentives guide.
Posted in Buying Strategy