Plug-In Solar Cost and Savings in the US

The market is still too new for a reliable national average.

Current US plug-in-solar offerings run from around a hundred dollars into the low thousands, but the products differ considerably in panel capacity, inverter output, mounting, installation and certification status, so a single price says little on its own.

That makes a single national price range potentially misleading.

For now, compare the price of the exact qualifying product available under the rules where you live.

Also check what that price actually includes. A kit price may not include property-specific mounting, electrical work or professional help where those are needed.

The main financial benefit does not require selling electricity.

It comes from using solar electricity in the home while it is being generated.

Suppose your home is using:

Conceptually, 350 W comes from solar and 550 W still comes from the grid.

The solar has reduced the amount of electricity you need to purchase at that moment.

DOE describes household solar as behind-the-meter generation. Electricity generated and used on the customer's side of the meter reduces the electricity that needs to be supplied by the utility.

That is bill saving through direct solar use.

It is separate from whatever happens to surplus electricity.

Reducing imported kWh does not necessarily reduce fixed, minimum or other non-volumetric charges on your utility bill.

The latest EIA data available when this page was checked put the average US residential electricity price at 18.34 cents per kWh in June 2026.

That is useful national context, not a savings rate to use for every household.

Your own tariff can differ from the state average too.

The practical rule is:

The value of a directly used kWh of solar depends on what that imported electricity would otherwise have cost you.

If you are on a time-varying or tiered tariff, the answer can depend on when the avoided purchase occurs as well.

Because solar and household electricity demand need to overlap for direct use.

Imagine two homes with identical solar systems.

Both generate the same amount of electricity.

One home regularly has computers, cooking, appliances or other electricity demand during solar-producing hours.

The other has very little daytime demand.

The first home may use more of its solar directly.

The second may produce more surplus.

The term for the share of solar generation used directly by the household is self-consumption.

That is different from solar coverage, which is the share of the household's total electricity demand supplied by solar.

High self-consumption does not necessarily mean solar covers a large share of total household electricity use.

Yes.

Available solar resource changes across the United States, and panel direction, tilt and shade matter too.

The National Laboratory of the Rockies' PVWatts model estimates photovoltaic generation using location and system characteristics rather than applying one national production figure.

That is also how the site's generation calculator, in development, is designed to work.

That difference is surplus solar.

Depending on the system and local arrangements, electricity may flow outward to the grid.

Do not assume that it does.

Several of the new state plug-in-solar laws create a simpler route for these small systems while keeping them outside conventional net-metering programs.

Utah's law says qualifying portable solar devices are not subject to its net-metering program requirements.

Vermont's enacted Act 149 is even more explicit: qualifying plug-in photovoltaic devices are not eligible for net metering, and generation they export to the grid is not compensated by the electric distribution company.

So:

"My state allows plug-in solar"

does not mean:

"My plug-in solar automatically gets net metering."

Maryland's § 7-321 provides a particularly clear example.

A qualifying portable solar system is outside the state's ordinary net-metering and interconnection provisions under §§ 7-306 and 7-306.1. It also cannot generate renewable-energy credits under this route.

Yet surplus electricity can still physically flow back toward the grid.

Maryland's Public Service Commission warns that what happens at the meter can depend on the meter type.

In some circumstances excess generation may be treated as zero consumption. With a meter that cannot correctly track power flowing back to the grid, it may even be erroneously added to measured consumption.

The PSC tells customers to ask their electric company how their meter treats excess power.

The broader lesson applies nationally:

Before putting a dollar value on surplus, establish how your utility treats export from that exact type of system.

No.

Directly used solar can reduce purchased electricity even where surplus earns nothing.

This makes daytime self-consumption particularly important.

Consider 1 kWh of solar generation.

If you use that 1 kWh directly, you can avoid purchasing approximately that amount of electricity.

If instead the 1 kWh becomes surplus and your applicable plug-in-solar arrangement provides no export credit, its financial value to you may be very different.

That is why annual solar generation and annual bill saving are not interchangeable numbers.

It is more useful to think of plug-in solar first as a bill-reduction product, not an income product.

Its main financial value can come from electricity you generate and use instead of buying from the utility.

Some solar arrangements may also provide financial value for export, but that has to be established under the applicable state, utility and program rules.

Keep three concepts separate:

Saving $100 is not the same as receiving $100 of export revenue.

And neither automatically means the system has made a profit.

There is not enough mature national data to give a responsible US plug-in-solar payback period.

A simple payback calculation is conceptually:

No for a new residential system installed in 2026.

This is an important change.

The federal Residential Clean Energy Credit under Internal Revenue Code § 25D previously provided a 30% credit for qualifying residential clean-energy expenditures.

Public Law 119-21 accelerated its termination.

The IRS now says the Residential Clean Energy Credit is not available for expenditures made after December 31, 2025.

It also explains that paying for property before the deadline does not preserve the credit if the original installation is completed after December 31, 2025.

So if you are buying and installing plug-in solar in 2026:

do not assume that 30% of the purchase price will come back as the former federal Residential Clean Energy Credit.

This is general tax information, not individual tax advice.

Possibly.

State, local and utility solar incentives vary around the country.

DOE points consumers to DSIRE as a resource for finding renewable-energy incentives and policies by location.

But plug-in solar creates an extra question:

Does this particular program include this type of system?

An incentive labeled "residential solar" may have requirements involving:

that a plug-in device does not necessarily meet.

Check the current program rules with the authority running the incentive before including it in your savings calculation.

No nationwide residential purchase incentive specifically for plug-in solar was identified when this page was checked.

If you pay the electricity bill and qualifying plug-in solar reduces electricity purchased on that account, the direct-use saving can still matter.

But that does not answer whether you can place or mount the equipment at the property.

Property permission and state rules are separate questions.

The upfront purchase can be much smaller because plug-in solar is a much smaller system.

But sticker price alone is not a useful economic comparison.

A conventional rooftop array can also generate far more electricity.

The better comparison is: