Battery now or retrofit later — the honest storage timing
Decisions built from Battery now and Retrofit later — editorial analysis, no sales stake; each figure sourced or labeled in review.
A battery bought with the system simplifies the wiring and the chip; a retrofit later keeps the deposit small. Which one wins depends on your outage tolerance and state rules — not on sales urgency.
At a glance: Battery now vs Retrofit later
| Battery now | Retrofit later | |
|---|---|---|
| Deposit | Larger today | Small, second later |
| Wiring | One visit, matched gear | Second visit, extra labor |
| Inverter fit | Designed for storage | May size change (in review) |
| Incentive timing | Locks today's rules | Rules may move (in review) |
When Battery now wins
- Outage tolerance is low (medical, freezers, well pump)
- Your state's rules make the battery attractive now and credit stacks into the same project
When Retrofit later wins
- Budget is the wall — panels first keeps payback short
- You want quotes from scratch in 2-3 years, when battery prices may have moved
The honest verdict
Batteries belong in the project when outages hurt you or export rules favor them. For pure payback, panels first with a written retrofit quote is the honest middle path — the state page's export rules are what turn the verdict either way.
Where these figures come from
Federal credit rules from the IRS (accessed 2026-08-08); market prices from EnergySage 2026; export rates per state records cited on each state page (CPUC NEM 3 for California); typical-home usage EIA 2023. Anything verified carries its date; the rest says "in review" until confirmed.