How Much Do Solar Panels Actually Save? 2026 Math

Key Takeaways

• The savings formula is one line: offset kilowatt-hours × your rate − export haircut. Everything else is inputs.
• At the May 2026 national average of 18.44¢/kWh, each 100 kWh you offset monthly is worth about $18.44; in a 33¢ state it's $33, in a 12¢ state, $12.
• Bills rarely hit zero: fixed charges, nighttime use, and below-retail export credits keep a floor under most statements.
• The federal credit's death didn't touch monthly savings — it stretched payback, which makes accurate savings math more important, not less.

The one-line formula

Solar saves you the electricity you stop buying. Written out:

Annual savings = (kWh consumed from your panels × retail rate) + (kWh exported × export rate)

When your utility credits exports at full retail — classic net metering — the two terms merge and savings are simply production × rate. When exports earn less than retail — net billing — the second term shrinks, and when you use power starts to matter as much as how much you produce. That single distinction explains most of the gap between neighborly anecdotes and your own results.

What the numbers look like at 2026 rates

Using EIA-derived rates (May 2026) and a typical home system offsetting 800 kWh a month — assumption labeled, adjust to yours:

Illustrative: 800 kWh fully offset at retail; net-billing exports would reduce these. Rates per EIA data via Choose Energy, May 2026.

Note what the table quietly says: the identical hardware saves a Californian nearly three times what it saves a North Dakotan. Solar savings are a rate story wearing a technology costume.

Why your bill won't be zero

Four leaks stand between "solar" and "$0.00":

1. Fixed charges — the connection fee on every bill survives any amount of generation.
2. Temporal mismatch — panels peak at noon; households peak in the evening. The mismatch either exports (at whatever rate) or draws from the grid.
3. Seasonal mismatch — December production may be half of June's while usage rises; annual credits smooth this only where banking rules are generous.
4. Export haircuts — under net billing, every exported kWh re-imported later costs you the spread.

None of these breaks the case; they set realistic expectations. Deep cuts — commonly well past half the bill for a properly sized system — are the honest promise; zero is a marketing one.

Compute yours in ten minutes

1. Pull twelve months of bills; note annual kWh and your true per-kWh rate (divide total charges by total kWh — this captures fees the rate card hides).
2. Run your address through NREL's PVWatts for a production estimate at a plausible system size.
3. Estimate self-consumption share (30–50% is common without a battery; higher with an EV charging by day or a battery shifting evenings).
4. Apply the formula with your utility's export rate for the remainder.
5. Multiply the annual figure by 25 years — degrade output ~0.5%/yr if you want precision — and set it against a real quote.

That last line is the whole worth-it decision, post-credit: lifetime savings versus sticker price, no federal thumb on the scale.

Two accelerants worth knowing

Rising rates. National average rates climbed roughly 7% over the past year. Savings computed at today's rate understate a 25-year asset's return if the climb continues — you needn't assume it, but every increase is a raise your panels collect automatically.

Flexible loads. The formula's weak spot — self-consumption share — is movable. Charging an EV by day, scheduling the dryer at noon, pre-cooling the house: each shifts kWh from the discounted export column to the full-rate offset column. Households that treat solar as a habit, not just hardware, routinely beat their installer's projections.

Keep reading: whether solar is worth it · solar and home value · the best time to install.