- The US federal 30% residential clean energy credit expired on December 31, 2025.
- Few state or utility rebates target plug-in kits specifically; check local programs.
- Germany applies 0% VAT to small solar systems, and some cities offer subsidies.
- In the UK, plug-in kits currently fall outside MCS-based schemes.
In this article
United States
The federal Residential Clean Energy Credit (25D), which covered 30% of solar costs, expired at the end of 2025. For 2026 purchases, there is no federal tax credit for plug-in or rooftop solar owned by homeowners. Some points to check:
- State programs: a few states and cities run efficiency or clean-energy rebates that may cover “portable solar” or “energy-saving devices”. They change often; search your state energy office’s site.
- Utility programs: some utilities offer rebates on batteries or smart thermostats rather than panels.
- Nonprofit pricing: organizations such as Bright Saver offer member pricing that works like a discount.
United Kingdom
Plug-in kits are not MCS-certified installations, so they generally do not qualify for schemes tied to MCS, including the Smart Export Guarantee. The industry expects Ofgem to create a simplified export route. 0% VAT on energy-saving materials applies to installed systems; check with the retailer whether it applies to a kit bought off the shelf.
Germany
- 0% VAT on the purchase of systems up to the balcony limits (800 W inverter, 2,000 Wp panels).
- Municipal subsidies: many German cities have offered grants of €100-500 for balcony systems; programs open and close frequently.
How to find local incentives
- Search “[your city/state] balcony solar rebate” and “[your city] portable solar incentive”.
- Check the DSIRE database (US) for your state.
- Ask your utility’s energy efficiency team.
Even without incentives, a good site pays back. See is balcony solar worth it?
The best incentive is placement
A well-placed kit can produce 30-50% more than a poorly placed one, worth more than most rebates. Start with angle and shade.
A step-by-step way to search for local money
- DSIRE. Open the Database of State Incentives for Renewables & Efficiency and filter by your state. Look at “rebate” and “loan” programs; most target rooftop solar, but a few are technology-neutral.
- Your utility’s savings page. Many utilities run efficiency rebates on smart thermostats, heat pump water heaters or batteries. They rarely cover plug-in kits, but pairing a kit with a rebated efficiency upgrade can cut your bill more than the kit alone.
- City and county programs. Search your city’s sustainability office. Some pilot programs for renters appeared alongside the 2026 state laws.
- Nonprofit pricing. Bright Saver’s $29-a-year membership gives at-cost pricing on its kits, which works like a discount of up to about 40% on its small kits.
- Tax advice. Before assuming any tax treatment, check with a tax professional; the federal residential credit for solar that homeowners own ended for expenditures after December 31, 2025, according to the IRS.
What a rebate is worth in payback terms
A $100 rebate on a $900 kit that saves $130 a year shortens payback from about 6.9 to 6.2 years. Moving the same kit from a shaded to a sunny spot, or tilting it, can add $30-50 a year, which shortens payback by more. Placement is still the biggest “incentive” you control.
Outside the US
- Germany: the 0% VAT rate on small PV systems, confirmed in the Federal Ministry of Finance’s FAQ, applies to balcony kits. City grants come and go; many require you to apply before you buy.
- UK: the Smart Export Guarantee has historically been tied to MCS-certified installations. Check Ofgem’s SEG page and your supplier for any plug-in route before counting on export income.
Frequently asked questions
Can a renter claim any solar tax credit?
For 2026 purchases in the US, the residential federal credit is no longer available. Check state programs.
Are batteries subsidized?
Some utilities and states offer battery incentives, typically for larger home batteries with installation. Plug-in batteries rarely qualify.
Do German city subsidies still exist?
Programs open and close frequently and funds often run out quickly. Check your city’s website before buying, since many require an application before purchase.
Sources
- FAQs for modification of sections 25C, 25D and others under the One, Big, Beautiful Bill, Internal Revenue Service.
- Expiration and carryforward rules for the Residential Clean Energy Credit, Congressional Research Service.
- Database of State Incentives for Renewables & Efficiency, DSIRE, NC Clean Energy Technology Center.
- Smart Export Guarantee (SEG), Ofgem.
- FAQ: Umsatzsteuerliche Maßnahmen zur Förderung des Ausbaus von Photovoltaikanlagen, Bundesministerium der Finanzen.
- $29 membership, Bright Saver.
Sources checked in September 2026. Laws, prices and product details change; if you spot something out of date, tell us.