Do Solar Panels Reduce Electricity Bills?

Solar panels reliably reduce electricity bills for the large majority of homeowners — the real question isn’t whether, but by how much, which depends on system size relative to usage and your local rate structure. This guide explains the mechanics behind the savings, how to read your own bill to predict them, and why a small charge usually remains even when the panels cover everything you use.

Table of Contents

• How Solar Actually Reduces Your Bill
• Sizing for Your Desired Offset
• Offset Levels and Typical Savings
• Why You’ll Likely Still Have Some Bill
• Frequently Asked Questions

How Solar Actually Reduces Your Bill

Solar production directly offsets electricity you’d otherwise buy from the grid — every kWh your panels generate and you use is a kWh you don’t pay for. Excess production, where net metering exists, can also earn bill credits for later use, further reducing your net cost.

Two kinds of savings

The first kind is self-consumption. When the panels are producing and the house is using power, the meter simply turns more slowly. You avoid buying that electricity at the full retail rate. The second kind is export. When production exceeds what the house needs, the surplus flows to the grid and your utility credits you for it. The value of that credit depends on your utility’s rules, which is why two identical systems in different states can save different amounts.

What a kilowatt-hour is worth

The U.S. Energy Information Administration reports an average residential electricity price of 18.34 cents per kWh for June 2026, up from 17.47 cents a year earlier, in its Electric Power Monthly. Prices vary widely by state; some New England and West Coast customers pay far more, and some Southern and Midwestern customers pay less. The EIA explains what drives those differences in its page on electricity prices and the factors that affect them. The higher your rate, the more every solar kilowatt-hour saves.

Net metering versus net billing

Under full net metering, each exported kWh cancels one imported kWh at the retail rate. Under net billing, exports are credited at a lower rate, often near the utility’s avoided cost. Several states have moved from the first model to the second. If your utility uses net billing, using power while the sun shines becomes far more valuable than exporting it. Our net metering guide explains how to find out which rules apply to you.

Sizing for Your Desired Offset

A system sized to roughly match your annual usage typically achieves near-100% offset over a full year, though monthly bills still fluctuate with seasonal production and usage patterns. Smaller systems provide partial offset proportional to their size relative to your total usage.

Start with twelve months of bills

Add up the kWh from a full year of statements. That annual total is the target. A system that produces roughly the same number of kWh per year is sized for 100 percent offset. Production per installed kilowatt depends on your location, roof direction, tilt, and shading, so an installer’s production estimate matters more than panel count. The how many solar panels do I need guide walks through the arithmetic.

Seasonal swings

Production peaks in late spring and summer and drops in winter. Usage often does the opposite in cold climates, or peaks in summer where air conditioning dominates. A 100 percent annual offset can mean a large credit in May and a bill in December. Utilities that carry credits forward month to month smooth this out; those that reset credits each year do not. Check the rollover rule before deciding how large to go.

Sizing above 100 percent

Oversizing makes sense when you expect load to grow, for example with an electric vehicle or a heat pump, or when your utility pays a fair rate for exports. It makes less sense under net billing, where surplus is worth much less than the power you use directly. Many utilities also cap system size at a percentage of historical usage.

Offset Levels and Typical Savings

These ranges assume no battery. Adding storage lets you use evening power from daytime production, which pushes a net-billing customer toward the net-metering column. The time-of-use rates and solar guide covers how rate schedules interact with all of this.

Why You’ll Likely Still Have Some Bill

Most grid-tied homes retain a minimum monthly connection/service charge from the utility regardless of solar production — this covers grid maintenance and access, not energy consumption specifically. Even a well-sized system typically won’t eliminate your bill entirely to $0, though it can get remarkably close.

The charges that don’t go away

A fixed customer or service charge appears on nearly every bill. Some utilities add a minimum bill, a grid-access fee for solar customers, or demand charges based on your peak draw. Taxes and public-benefit surcharges are often calculated on the fixed portion too. Read one bill line by line before you buy so the remaining amount is not a surprise.

Ways to shrink the remainder

Shift flexible loads to daylight hours: run the dishwasher, laundry, and pool pump when the panels are producing. Charge an EV during the day if it is home. Cut waste first; a home energy audit often finds savings that let a smaller system reach the same offset. Consider a battery if your utility’s export rate is low and its evening rate is high.

A worked example

Suppose a home uses 10,000 kWh a year at 18 cents per kWh, or about 1,800 dollars. A system sized for 100 percent offset under full net metering would leave only the fixed charges, perhaps 10 to 25 dollars a month depending on the utility. Under net billing with 40 percent of production used on site and exports credited at 6 cents, the same system would save roughly 720 dollars on self-consumed power plus 360 dollars in export credits, or about 1,080 dollars. The hardware is identical; the rate rules make the difference.

Reading the first solar bill

Your first bill after interconnection will show new lines: kWh delivered to you, kWh received from you, and the net. Under net metering the net is what you pay for or bank. Under net billing you will see imports priced at retail and exports credited separately. Compare it with the same month last year rather than with the previous month, since seasons matter more than the calendar. For the long-run picture, the solar incentives and ROI hub collects the payback and incentive guides.

Frequently Asked Questions

Can solar panels eliminate my electricity bill completely?
Rarely to exactly $0 — most utilities charge a minimum connection fee regardless of production, but bills can drop dramatically.

How much will my bill actually go down?
Depends on system size relative to usage — a well-sized system can reduce bills 80-95%+ annually.

Does my bill stay reduced every single month?
It varies seasonally with production, though annual net savings remain consistent for a properly sized system.

What’s the minimum charge I’ll still pay?
Typically a utility connection/service fee, varying by provider, covering grid access regardless of your production.

Should I size my system for 100% offset or more conservatively?
Depends on your goals and available roof space — either approach can make financial sense depending on local rates and incentives.

Do solar panels save more money under net metering or net billing?
Net metering, because exports are credited at the retail rate. Under net billing, using power during the day matters far more than exporting it.

Calculate your specific expected savings with our solar payback period calculator. For net metering specifics affecting excess production value, see our net metering guide.

Our how long do solar panels take to pay off? guide covers this in more depth.

Cutting consumption first makes every later upgrade smaller, as shown in home energy audit.