Plug-In Balcony Solar: Which States Allow It and What It Saves

What plug-in solar is

A plug-in solar kit is one to a few panels with a small inverter that connects to an ordinary household outlet. The power it makes flows into your home's wiring and is used by whatever is running at the time — the fridge, the router, a computer — reducing what you buy from the utility. US state laws generally cap these systems at around 1,200 watts; most kits are 400 to 800 watts.

They're aimed at renters, apartment dwellers and anyone who can't put a full system on a roof: panels can go on a balcony railing, a patio, a fence or a garage wall. There's no installer, and in states that have legalized them, no utility interconnection application.

Which states allow it

As of early October 2026, ten states have enacted laws allowing plug-in solar without the usual utility approval process:

• Utah — the first, in 2025, for systems up to 1,200 watts.
• Virginia, Colorado, Maine and Maryland — enacted in spring 2026.
• Connecticut (effective October 1, 2026), New Hampshire and Vermont (effective July 1, 2026, up to 1,200 watts AC).
• New Jersey — signed September 2026, effective March 1, 2027.
• California — SB 868, signed September 30, 2026, effective January 1, 2027.

New York's bill passed the legislature in May 2026 and was awaiting the governor's signature. Similar bills were filed in about half the states. Elsewhere, connecting any generator to your home without utility approval may break your utility's rules, even if the kit is sold online.

The catch: certified products

The new laws generally require kits to meet UL 3700, a safety standard for plug-in systems published in December 2025. As of mid-2026, no complete kit had finished certification, and compliant products are expected in stores around 2027. Until then, be wary of kits that claim to be "legal everywhere."

The safety concerns are real but manageable with certified equipment: an inverter must shut off instantly when unplugged or when the grid goes down, so the plug never carries live power, and the circuit it's plugged into must not be overloaded. Use a dedicated outdoor-rated outlet where possible, and never plug a kit into an extension cord or power strip.

What it can save

An 800-watt kit facing south in a typical US location produces roughly 1,097 kWh a year — about $219 worth at 20¢ per kWh. That assumes all of it is used in your home as it's produced. Most homes draw a few hundred watts around the clock from fridges, routers and standby devices, so a small kit's output is usually absorbed; anything beyond that flows to the grid, typically uncredited.

A balcony mount facing east or west, partly shaded or hung vertically on a railing produces noticeably less — often 25% to 50% less than an ideal tilted, south-facing panel. To see your home's real baseline use, an outlet energy monitor or a whole-home energy monitor shows it before you buy.

With certified kits expected to cost several hundred to about a thousand dollars, a well-placed kit in a state with expensive electricity could pay for itself in a few years; in a cheap-power state with a shaded balcony, it may never.

Plug-in kit or rooftop system?

If you own your home and have a good roof, a rooftop system makes far more power and usually costs less per watt over its life — see what one would save on your city's page. Plug-in solar is the option for people who can't do that: renters, condo owners and small homes with limited roof space. Our guide to whether solar is worth it in 2026 covers the rooftop decision.