Plug-in solar
Plug-In Solar Cost and Savings 2026: Balcony Kit Payback in the US
What a plug-in solar kit costs in the US as of November 2026, how much it produces by region, what that saves at your rate, and the payback in years.
This guide is still being verified. Some details may change.
Key facts
- As of November 2026, an 800 to 1,200 W plug-in kit without a battery costs roughly $400 to $900; with a battery, $1,200 to $2,500.
- Yield runs from about 1.2 kWh per watt of panel per year in the cloudiest regions to 1.8 in the desert Southwest; a vertical railing mount loses a quarter to a third of that.
- At retail rates of 15 to 35 cents per kWh, a well-placed 800 W kit saves roughly $120 to $280 a year.
- Payback is typically two to seven years without a battery; a battery adds cost faster than it adds savings.
- The federal residential clean energy credit (Section 25D) ended for systems placed in service after 2025, so no federal credit applies to a 2026 purchase.
As of November 2026, a plug-in solar kit (balcony solar) with 800 to 1,200 W of panels costs roughly $400 to $900 in the United States without a battery and $1,200 to $2,500 with one. A tilted, south-facing 800 W kit produces 950 to 1,450 kWh a year depending on the region, a vertical railing mount a quarter to a third less, and every kilowatt-hour you use yourself saves the retail rate, 15 to 35 cents in most of the country. That puts payback at two to seven years without a battery, and there is no federal tax credit in 2026 to shorten it.
What a kit costs as of November 2026
The prices below are market observations from US retailers in November 2026, not a survey. They move with tariffs on imported panels and with the number of certified kits on the market, so treat them as a range to check against, not a quote.
| Kit | What you get | Typical price, November 2026 |
|---|---|---|
| 800 W, two panels | Two panels, one or two microinverters, cord, railing or ground mount | $400 to $700 |
| 1,200 W, three panels | Three panels, microinverters, cord, mounting | $600 to $900 |
| 800 to 1,200 W with battery | Panels plus a 1 to 2 kWh battery unit with its own inverter | $1,200 to $2,500 |
Kits listed as a complete system by a nationally recognized testing laboratory sit at the upper end of each range, uncertified imports at the bottom. In the states with a plug-in solar law, the listing is a legal requirement, not an option, so the cheaper kit is often not a choice at all. Add sales tax where your state charges it on solar equipment, freight for panels too large for parcel services, and roughly $100 to $300 if you want an electrician to add a dedicated outdoor outlet.
How much a kit produces by region
Yield is a function of sunlight, orientation and tilt. The figures below are rounded from NREL’s PVWatts calculator, which you can run for your own address; they assume a south orientation, a tilt near your latitude and no shade. Expressed per watt of panel capacity, the United States runs from about 1.2 kWh a year in the Pacific Northwest to about 1.8 in the desert Southwest.
| Region (example cities) | Yield per watt of panel, tilted | 800 W kit, tilted | 800 W kit, vertical south railing |
|---|---|---|---|
| Pacific Northwest (Seattle, Portland) | about 1.2 kWh | about 950 kWh | about 650 kWh |
| Northeast and Great Lakes (New York, Chicago) | about 1.3 to 1.4 kWh | about 1,050 to 1,100 kWh | about 750 kWh |
| Southeast (Atlanta, Miami) | about 1.4 to 1.5 kWh | about 1,150 kWh | about 800 kWh |
| Mountain West (Denver, Salt Lake City) | about 1.6 kWh | about 1,300 kWh | about 900 kWh |
| Desert Southwest (Phoenix, Las Vegas) | about 1.8 kWh | about 1,450 kWh | about 1,000 kWh |
A panel hung flat against a vertical railing, which is what most balconies allow, loses roughly a quarter to a third of the tilted yield when it faces south and roughly half when it faces east or west. A balcony that is in the shadow of the balcony above for half the day loses half again. PVWatts accepts a 90 degree tilt and any azimuth, so it answers the question for your railing in a minute.
What that saves at your rate
Only the electricity used in the home at the moment it is produced counts, because nobody pays you for the surplus. An apartment’s base load of roughly 100 to 200 W absorbs most of a 400 W kit; an 800 W kit peaks above that at midday, so 60 to 80 percent of its output is typically used directly, less in an empty apartment, more when someone works from home or the air conditioning runs. A battery raises the share to 90 percent or more. The HTW Berlin simulator, built for the German market, models this share for different household patterns and is the best public tool we know for the question.
The value of each kilowatt-hour is your full retail rate including delivery charges, because that is what a kilowatt-hour you do not buy costs. The average US residential rate was roughly 17 cents per kWh in 2025 according to EIA data. Washington and Idaho sit near 11 to 13 cents, California and much of the Northeast above 25, and some utilities above 35. Read the rate on your own bill; the national average is irrelevant to your payback.
Payback in years
The table combines a price at the middle of the observed range, a yield from the region table and a self-consumption share of 60 to 75 percent without a battery and 90 percent with one. Savings are rounded.
| Setup | Price, November 2026 | Solar used in the home per year | Yearly savings at 15 / 25 / 35 cents | Payback at 15 / 25 / 35 cents |
|---|---|---|---|---|
| 800 W, vertical railing, cloudy region | $500 | 500 kWh | $75 / $125 / $175 | 6.7 / 4.0 / 2.9 years |
| 800 W, tilted, average sun | $600 | 800 kWh | $120 / $200 / $280 | 5.0 / 3.0 / 2.1 years |
| 1,200 W, tilted, sunny region | $900 | 1,300 kWh | $195 / $325 / $455 | 4.6 / 2.8 / 2.0 years |
| 800 W with battery, tilted, average sun | $1,800 | 1,050 kWh | $158 / $263 / $368 | 11.4 / 6.8 / 4.9 years |
A kit that pays back in four years and lasts fifteen returns three to four times its price. Panels are typically warranted for 25 years; microinverters for 10 to 25 years depending on the maker, and they are the part most likely to need replacing. A kit is also portable: if you move within the payback period, it moves with you, which no rooftop system offers.
The battery question
A battery raises the share of solar you use yourself, but in the table it adds roughly 250 kWh of used electricity, worth $40 to $90 a year, against roughly $1,200 of extra cost. On savings alone it does not pay. It makes sense for two other reasons: running a few devices plugged into the battery unit during an outage, and households where nobody is home during the day and the surplus would otherwise be given away. If neither applies, buy the panels now and decide about the battery after a year of real data from the inverter’s app.
Tax credits and rebates in 2026
The federal residential clean energy credit under Section 25D of the Internal Revenue Code, which paid 30 percent of the cost of home solar, ended for systems placed in service after December 31, 2025, under the tax law enacted in July 2025. As far as we can tell from the IRS guidance, a kit bought and installed in 2026 gets no federal credit, and whether a plug-in kit qualified at all was never settled while the credit existed. Check with a tax professional before you count on anything, because the rules changed recently and many older articles still show the 30 percent.
State and utility rebates vary and mostly do not apply. Most programs were written for permitted rooftop systems with an interconnection agreement and require an installer’s paperwork that a plug-in kit never generates. A few states exempt solar equipment from sales tax, and whether a plug-in kit counts depends on the state’s definition. The DSIRE database lists every state and utility program; search it for your state and read the eligibility rules before assuming a kit qualifies.
When a kit does not pay
A north-facing or heavily shaded balcony halves the yield and doubles the payback; below 1 kWh per watt per year and 12 cents per kWh, payback stretches past ten years, and the money is better spent on a more efficient refrigerator. An uncertified kit in a state that requires certification saves nothing if the utility or the landlord makes you remove it. And a kit on a circuit that already runs a space heater or a window air conditioner is a wiring question before it is a savings question; the breaker does not see the solar current, which is why the laws cap the inverter at 1,200 W and why a dedicated outlet matters.
Next steps
Frequently asked questions
How much does a plug-in solar kit cost?
As of November 2026, roughly $400 to $900 for an 800 to 1,200 W kit without a battery and $1,200 to $2,500 with one. Kits listed as a complete system by a recognized testing laboratory sit at the upper end of each range.
How long does a plug-in solar kit take to pay for itself?
Two to seven years for a kit without a battery, depending on your electricity rate, your region and the mounting. A battery kit takes five to twelve years. Panels last 25 years or more, so most kits return several times their price.
Is there a federal tax credit for plug-in solar in 2026?
As far as we can tell, no. The residential clean energy credit under Section 25D ended for systems placed in service after December 31, 2025. Whether a plug-in kit qualified at all was never settled. Check with a tax professional before counting on any credit.
Is a battery worth it with plug-in solar?
Rarely on savings alone. A battery raises the share of solar you use yourself from roughly 70 to 90 percent, worth $40 to $90 a year at typical rates, while adding $800 or more to the price. It makes sense if you want to run a few devices during an outage or if nobody is home during the day.
How much can I save with balcony solar in an apartment?
An 800 W kit on a tilted, south-facing mount in an average region supplies about 800 kWh a year that you use yourself, which is $120 at 15 cents per kWh and $280 at 35 cents. A vertical railing mount in a cloudy region supplies about 500 kWh, worth $75 to $175.
Sources
This guide is general information, not legal, tax or electrical advice. Your utility, state and local code have the final say.