Plug-in solar for US homes

What plug-in solar does

Plug-in solar generates electricity from photovoltaic panels and feeds it into a building's electrical system through a compatible receptacle. It's sometimes called balcony solar because the panels may be meant for smaller spaces rather than a permanent rooftop installation. Its basic job is to offset the electricity you use onsite while utility power is available.

That makes it different from a conventional portable power station. A plug-in solar device supplies electricity to the building through an approved connection, while a power station stores energy in a battery so compatible appliances can use it later. The difference decides which one fits your goal: lower everyday use, or power during an outage.

How plug-in solar differs from battery backup

"Solar generator" usually means a portable power station paired with compatible solar panels. Those panels recharge the battery; they don't make the setup a receptacle-connected plug-in solar system, so the two terms aren't interchangeable. If your main concern is keeping appliances running during a blackout, start with our portable power station guide.

Why certified isolation matters

Any device that generates electricity into a building has to work safely with that building's electrical system, and the key question is what happens when utility power fails. California's portable solar law makes this a condition: a qualifying device needs a certified isolation feature that separates it from the building's electrical system to prevent grid backfeeding, and it must also meet the law's other certification conditions. Colorado, Vermont and Virginia require a feature that stops the device from energizing the grid or the building, or exporting power, during an outage, and Maine requires inverters set to shut off 0.2 seconds after power is disrupted.

Never use a plug-in solar device that lacks certified outage isolation. Don't assume an ordinary solar panel, portable inverter or power station can safely supply electricity through a household receptacle. Use only equipment specifically designed and certified for the connection you intend.

Plug-in solar is not an outage backup plan

A plug-in solar device that isolates during an outage can't be counted on for household electricity while the grid is down. A charged power station is different: it runs compatible appliances directly through its own outlets. If your household needs power for refrigeration, communications, lighting or medical equipment during an outage, plan a separate backup system.

A portable battery's capacity and output decide what it can support. Our power station finder lets you pick the essential appliances and how long they need to run, then estimates the stored energy required. Don't connect a portable battery to household wiring without listed transfer equipment installed by a licensed electrician with any required permit.

Where plug-in solar has a state law

There is no national plug-in solar rule. As of October 19, 2026, we confirmed enacted laws in the six states below by reading each bill or chapter on the state legislature's own website. Each state sets its own size cap and certification rule, so one state's conditions don't carry over to another.

Some conditions don't fit in a table:

• Maine allows up to 420W per service address without an electrician. Between 420W and 1,200W, each system needs a licensed electrician and a dedicated circuit with a single outlet, and the customer must notify the utility within 30 days.
• Maryland requires notifying the electric company before installation and giving it a certification of the system's safety features and maximum generating capacity.
• Vermont allows plug-in devices only on systems that use smart meters.
• California's utility exemption ends January 1, 2030. Our California plug-in solar guide covers the six conditions and the dates.

New York's legislature passed a plug-in solar bill (A9111C, same as S8512C) on May 28, 2026, but on October 19, 2026 the New York Senate's site didn't show it as signed. News outlets report laws in other states, including Utah, Connecticut, New Hampshire and New Jersey, that we haven't yet confirmed on those legislatures' own sites, so they aren't in the table. If your state isn't listed, check its legislature and your utility before buying.

In a state without a plug-in solar law, a device that feeds a building's wiring generally falls under the utility's interconnection rules, so read those rules before you buy anything.

What renters should check

Plug-in solar appeals to renters because they don't own the building or control permanent electrical installations. Before choosing equipment, check:

• Whether your state permits the intended system
• Whether the equipment has the required certification
• Whether your lease allows the proposed arrangement
• Whether landlord permission is required
• Whether building or HOA rules apply
• Whether the intended location is suitable under the manufacturer's instructions
• Whether any utility notice is required

A utility interconnection exemption doesn't, by itself, settle lease terms, property permissions or building requirements. A product marketed as renter-friendly isn't automatically approved for every rental property.

Before buying plug-in solar

Start with what you want the equipment to do. To offset electricity while the grid is up, look at the plug-in solar requirements in your state. To have electricity during an outage, compare compatible battery backup systems instead. For a plug-in device, verify its intended electrical connection, certification, outage isolation and manufacturer instructions, and never use uncertified equipment or improvise a connection to household wiring.

This guide provides general information, not legal or electrical advice. Check current state and local requirements and consult a qualified professional where needed.