Plug-in solar — frequently asked questions
What is plug-in (balcony) solar?
A small solar system — usually one to four panels with a micro-inverter — that plugs into a regular 120V wall outlet and offsets your home’s consumption. No roof work, no electrician, no traditional interconnection paperwork in states that have legalized it.
Is it safe to plug solar panels into a wall outlet?
Certified systems are designed for exactly this: UL-listed micro-inverters shut off instantly when unplugged or when the grid goes down (anti-islanding). The state laws passed so far all require UL certification. Uncertified imports are where the risk lives — avoid them.
Which states have legalized plug-in solar?
Utah was first (HB 340, effective May 2025, 1,200W). Virginia, Maine, Maryland and Colorado (1,920W) followed in 2026, and California’s SB 868 passed the Senate in May 2026. Over 30 states considered bills in 2025–2026 — see the live table on our States page.
How much does a kit cost and save?
Typical 800W kits run $500–$1,200 (about 80–97% cheaper than an installed rooftop system per project). Savings depend on your state’s sun and rates: roughly $100–$320 per year for 800W, with payback commonly in 3–7 years. Battery-based kits cost more but capture more of the production.
Do I get paid for extra power I export?
Almost never. Plug-in solar laws are self-consumption laws, not net-metering programs. Power you don’t use flows to the grid without compensation — so size the system to your baseline daytime load, or add a small battery.
Can I use plug-in solar in a state without a law?
It’s a gray zone: nothing specifically permits it, and utility interconnection tariffs written for rooftop systems technically apply. Portable power stations that don’t backfeed the home circuit are the clean workaround. When your state passes a law, our state page will reflect it.
Do renters need landlord permission?
For plugging into an outlet — generally no. For drilling or hanging mounting hardware on a balcony railing — yes, get it in writing. Freestanding ground or patio mounts avoid the issue entirely.
Does the 30% federal tax credit apply?
The federal residential clean energy credit has historically applied to solar equipment including batteries; how it applies to small plug-in kits depends on current IRS guidance — consult a tax professional for your situation.