The question behind every solar quote: how many years until it pays for itself? For a Bay Area home in 2026, a well-designed solar-plus-battery system typically pays back in roughly 7–12 years, then delivers free-and-clear savings for the 15+ years after that. Solar-only systems can pay back a bit faster on paper but save less over their life under NEM 3.0. Here's how the math actually works — and what makes it faster or slower.
Pacific Edge Electric and Solar is a licensed C-10 electrical contractor (CA #1143455) in Los Gatos. We model payback for Bay Area homeowners every week, so this is the real framework we use — not a rosy sales estimate.
How to calculate solar payback
Payback period is simple in concept: system cost ÷ annual savings = years to break even. The nuance is in the two numbers.
- System cost is the installed price after any incentives. Note the 30% federal residential tax credit expired after 2025, so 2026 homeowner systems use the full price.
- Annual savings is how much you stop paying PG&E each year — and under NEM 3.0 this depends heavily on how much of your own power you actually use on-site versus export.
Why NEM 3.0 changed the payback math
Under the old NEM 2.0, you got near-retail credit for power you exported to the grid, so solar-only systems paid back fast. Under NEM 3.0 (net billing, for solar customers since April 2023), exported power earns roughly 75% less. That means:
- Solar-only systems export a lot of midday power for little credit, so their savings — and payback — are weaker than they used to be.
- Solar + battery systems store midday production and use it during expensive evening hours instead of buying from PG&E, capturing far more value. They cost more up front but save more per year, and usually win on lifetime savings.
This is why a battery, which looks like it lengthens payback because it adds cost, often improves the long-run return.
A realistic Bay Area example
| Solar only | Solar + battery | |
|---|---|---|
| Installed cost | ~$28,000 | ~$42,000 |
| Estimated annual savings | ~$2,600 | ~$4,300 |
| Simple payback | ~11 years | ~10 years |
| 25-year lifetime savings | ~$37,000 | ~$70,000 |
These are illustrative — your roof, usage, and rate plan move them — but they show the pattern: the battery system pays back in a similar time yet saves roughly double over its life, because it dodges high evening grid prices.
What makes your payback faster
- A high PG&E bill. The more you're paying now, the more you save — homes with big bills pay back fastest.
- Right-sized system. Sizing to your usage (not oversizing) avoids paying for power you'll only export cheaply.
- A battery used well. Shifting self-consumption into peak hours is where NEM 3.0 savings live.
- Rate inflation. PG&E rates have historically risen faster than general inflation; every increase shortens your payback.
- Financing that beats your bill. With $0-down solar loans structured below your current bill, you're cash-flow positive long before the system is "paid off."
Getting your real number
Payback is genuinely home-specific — the only way to get a trustworthy figure is to model it against your last 12 months of PG&E usage and your rate plan. That's exactly what we do. Try our NEM 3.0 savings calculator for a first estimate, read the NEM 3.0 buyer's guide for the full context, or request a free quote and we'll build the payback model for your address.
Frequently asked questions
What is the solar payback period in the Bay Area?
For a well-designed 2026 system, expect roughly 7–12 years to break even, followed by 15+ years of savings over the system's life. Homes with high PG&E bills pay back on the faster end.
Does adding a battery make payback longer?
It adds up-front cost, but because a battery captures far more value under NEM 3.0 (using stored power in expensive evening hours), the payback period is often similar to solar-only while lifetime savings are substantially higher.
Is the payback worse now that the tax credit ended?
Somewhat — without the 30% federal residential credit, 2026 payback is a few years longer than in 2025. But high, rising PG&E rates keep the case strong, especially for homeowners staying in the home long-term.
Example figures are illustrative for planning only; actual payback depends on your usage, rate plan, roof, and financing, and is modeled individually before purchase. Written by Adam Aksoy, licensed C-10 electrical contractor (CA #1143455), Pacific Edge Electric and Solar.