Reality check · the $0-bill promise

Why your solar bill may not go to zero.

Updated May 16, 2026. Bill components and net-metering policies are utility-specific. Verify with your utility before treating these ranges as your numbers.

"Eliminate your electric bill."It's the headline. It's on billboards, in mailers, in opening lines of installer pitches. It's almost never what actually happens. Even a perfectly-sized residential solar install on a sunny roof in a permissive utility territory usually leaves the homeowner with a bill — sometimes a small one, sometimes large enough to matter to the payback math, sometimes both depending on the time of year.

Three things keep that bill alive. None of them are exotic. Each one is easy to verify before signing, and each one deserves a question to the installer or the utility.

Reason 1 — Fixed utility charges

Most U.S. residential electric bills carry a monthly customer charge, sometimes labeled basic service, connection fee, or distribution service charge. It's the price of being plugged in. Typical range: $5 to $25 per month, with some utilities running higher. The charge applies whether your home consumed 10 kWh or 1,000 kWh in the billing period.

Solar doesn't offset it. Solar offsets the per-kilowatt-hour energy charge on the bill, and sometimes offsets a separate per-kWh delivery charge, but the fixed line items keep collecting at the standard monthly cadence. For most homeowners, this floor is the largest single component of the "why isn't my bill zero?" surprise. A $15/month fixed charge × 12 months = $180/year that will show up regardless of how much solar your roof produces.

How to test:pull your most recent utility bill. Look for line items that don't list a quantity in kWh next to a price. Those are the fixed charges. Add them up. That's your minimum post-solar bill, before any energy charges or net-metering credits flow in.

Reason 2 — Seasonal mismatch

Solar production peaks in summer; residential consumption often peaks at a different time of year. The mismatch depends on climate. A home in Phoenix with heavy AC use peaks at summer consumption — solar production matches reasonably well. A home in Maine with electric heat peaks at winter consumption — solar production is at its lowest exactly when the bill is at its highest.

Even when annual production matches annual consumption, the monthly bills tell a different story. A 10,000 kWh/yr system on a roof that produces 60% of its output between May and September and 40% between October and April will create surplus credits for summer and a deficit in winter. Whether those summer credits carry over to offset the winter deficit depends entirely on your utility's compensation model (see net metering vs net billing).

Under traditional net metering with full annual credit rollover, the summer surplus can cover the winter deficit and the bill stays low across the seasons. Under net billing — where exports get paid at avoided cost instead of retail rate, and credits may not roll forward — the summer surplus is worth far less than the winter deficit. Same annual production, meaningfully different annual bill.

How to test:ask the installer for a month-by-month projected production curve vs your month-by-month consumption (the utility bill shows the latter, usually for the past 12 months). If summer production substantially exceeds summer consumption while winter consumption substantially exceeds winter production, you have a mismatch — and the size of the post-solar bill depends on whether your utility's policy bridges the gap.

Reason 3 — Net-metering / net-billing policy

Reason 3 ties the first two together. Even a system whose annual production matches annual consumption can produce a non-zero annual bill if the utility's compensation model devalues exported kilowatt-hours. Under net billing, midday surplus gets credited at maybe 25% of retail rate while evening imports get billed at full retail. The system produces enough energy on paper to cover the year; the financial accounting doesn't.

The Department of Energy's framing on this² is the right one: "Whether or not your solar system qualifies for net metering payments depends on policies and practices in your state and electric utility." Same utility territory, different tariffs, sometimes within a few blocks of each other if the utility boundary cuts through a neighborhood. Verifying which policy applies to you is a one-call task. Building a $30,000 financial decision around the wrong assumption is a five-figure mistake.

What "near-zero" actually looks like

For a well-designed residential solar system on a retail-rate net-metering tariff with annual credit rollover, the typical post-solar bill looks like:

• Fixed monthly customer charge: $10–$25/month
• Small variable charges in months where consumption pulled ahead of production after credits drew down
• A potential annual true-up settlement, where unused credits (if any) pay out at wholesale rate

Annual total: typically $200–$500 in a region with average sun and well-sized system. That's the "near-zero" most homeowners actually achieve under retail-rate net metering. Recent EIA data¹shows the average residential bill in the U.S. would otherwise run roughly $1,800–$2,200/year at current rates — so "near-zero" is still a 75–90% reduction. Real. Substantial. Just not zero.

Under net billing, the post-solar bill can run $600–$1,200/year even with the same system on the same roof — the difference is export-credit math, not solar economics.

When zero IS achievable

Three conditions, all of which need to be true:

1. Your utility has no fixed monthly customer charge, or has a waiver/reduction for solar-interconnected customers. Rare, but it exists in some municipal utilities and electric cooperatives.
2. Your utility runs retail-rate net metering with annual credit rollover at retail value, or rolls credits in a way that lets summer surplus fully offset winter deficit.
3. Your system is sized to produce slightly more than your annual consumption — enough that the summer surplus, even credited at full retail rate, covers your fixed charges alongside your winter consumption.

For most U.S. homeowners, condition #1 disqualifies the path entirely — the fixed charge is set in the utility's tariff and can't be solar'd away. The honest promise from a salesperson should be "a near-zero bill consisting of fixed charges only, in a typical year, under our retail-rate net-metering tariff" — and that promise should be in writing.

What to ask

Three questions, one for each reason:

1. To the utility: What fixed monthly charges apply to a residential customer with rooftop solar, and how do they appear on the bill?
2. To the installer: Provide a month-by-month projected production vs my actual 12-month consumption, and identify which months the projected bill is non-zero. Show me what the year looks like, not just the annual total.
3. To the utility (again): Under current tariff, are exported kilowatt-hours credited at retail or at avoided cost? And do credits roll forward across months and across the annual true-up?

The bottom line

A residential solar install on the right utility tariff in the right climate can deliver bill savings in the $1,300–$2,000/year range against pre-solar usage. That's a real outcome, a substantial one, and a 25-year financial decision worth making for it. But the headline "eliminate your bill" almost always survives only as "reduce your bill by 75–90% in a typical year while continuing to pay fixed utility charges." The latter is the honest promise. Confirm it before the signature page.

1. 1. EIA Electric Power Monthly, Table 5.6.A — Average Price of Electricity to Ultimate Customers by End-Use Sector. February 2026 residential average: 17.65 ¢/kWh, +7.4% year over year vs February 2025. 10-year residential rate trend: ~2–3% per year. Released April 23, 2026. Verified 2026-05-16. eia.gov/electricity/monthly ↩
2. 2. U.S. Department of Energy, "Homeowner's Guide to Going Solar." Lists four consumer-protection red flags: "Don't give in to pushy sales tactics," "Talk to certified installers," "Understand your financing options," and "Report bad actors." Recommends NABCEP-certified installers and points readers to FTC, CFPB, and state-utility complaint channels. Verified 2026-05-16. energy.gov/eere/solar/homeowners-guide-going-solar ↩

Next: Solar sales red flags — the pitches worth walking out on.