Plug-In Solar: The Complete Guide for Renters and Homeowners
Plug-in solar is the simplest way to make your own electricity. A small kit of one to four panels, with a microinverter, plugs into an ordinary outdoor or balcony outlet and feeds power straight into your home’s circuits. There is no roof work, no installer and, in a growing number of states, no utility paperwork. This guide explains how it works, what it can realistically save, where it is allowed and how to choose a kit.
Quick answer: an 800-watt plug-in kit facing south with little shade typically produces around 800 to 1,100 kWh a year in much of the U.S. At around 17 cents per kWh, that is roughly $130 to $190 a year off your bill, so a kit costing $600 to $1,200 can pay for itself in about 4 to 9 years. Panels facing east or west, mounted upright on a railing, or shaded for part of the day will produce less.
What plug-in solar is
A plug-in solar system (often called balcony solar) has three parts:
- Solar panels, usually 400 to 1,200 watts in total, mounted on a railing, wall, patio or in the yard.
- A microinverter that turns the panels’ DC power into the same AC power your outlets use, and matches it to the grid.
- A cable and plug that connects the inverter to a standard outlet.
The power flows into the circuit the kit is plugged into. Anything running in your home at the same time, such as the fridge, router, freezer or air conditioner, uses that solar power first, so your meter spins more slowly.
How it is different from rooftop solar
| Plug-in solar | Rooftop solar | |
|---|---|---|
| Typical size | 400 to 1,200 watts | 5,000 to 10,000 watts |
| Cost | About $400 to $1,500 | About $15,000 to $30,000 before incentives |
| Installation | You set it up in an afternoon | Licensed installer, permits and inspection |
| Works for renters | Yes, with landlord agreement | Rarely |
| Covers the whole bill | No, it trims the baseline load | Often most of it |
Plug-in solar is not a replacement for a rooftop system. It is a low-cost way to cover your home’s always-on load: the refrigerator, freezer, internet equipment, standby devices and anything else that runs all day.
How much can it save?
Output depends on three things: the size of the kit, the sunshine where you live and the way the panels face. A useful rule of thumb is:
Yearly kWh = kit watts x peak sun hours x 365 x 0.75 (the 0.75 covers inverter losses, heat, dirt and angle). Then divide by 1,000 to turn watt-hours into kilowatt-hours.
| Kit size | 3.5 sun hours (cloudier states) | 4.5 sun hours (sunnier states) | 5.5 sun hours (Southwest) |
|---|---|---|---|
| 400 W | about 380 kWh | about 490 kWh | about 600 kWh |
| 800 W | about 770 kWh | about 990 kWh | about 1,200 kWh |
| 1,200 W | about 1,150 kWh | about 1,480 kWh | about 1,810 kWh |
Multiply the yearly kWh by your electricity price (it is on your bill, usually 12 to 30 cents per kWh) to get your yearly savings. Panels mounted upright on a balcony railing can produce noticeably less than this, and partial shade from trees, walls or the balcony above cuts output further. Our electricity bills and rates guides explain how to find your real price per kWh.
Use it, do not export it
Most plug-in systems do not get paid for power sent back to the grid. Savings come from power you use at the moment it is produced. Size the kit to your daytime baseline load (often 150 to 400 watts for an average home) and nearly every watt is used. A larger kit only pays off if something else is running during the day, or if you add a battery.
Is plug-in solar legal where I live?
Owning a plug-in kit is legal everywhere. The question is whether you can connect it without the utility interconnection process used for rooftop systems. Utah was the first state to pass a plug-in solar law in 2025. By October 2026, nine more had followed: Maine, Virginia, Colorado, Maryland, Connecticut, New Hampshire, Vermont, New Jersey and California, whose law takes effect on January 1, 2027. Many others have bills in progress, and some laws take effect months after they are signed. These laws typically:
- Allow systems up to a set size, often 1,200 watts per home (Colorado allows more, and Maine lets you install up to 420 watts yourself, with an electrician needed above that).
- Require certified equipment, such as a listed microinverter that switches off automatically if the grid goes down.
- Remove or simplify utility approval for small systems.
Rules change fast, so check our plug-in solar laws section for your state, and check your lease or HOA rules if you rent or live in a managed building.
Safety basics
- Buy kits whose microinverter is certified for grid connection in the U.S. (look for a UL 1741 listing) and has automatic shut-off when the grid goes down, so no power flows into utility lines during an outage.
- Plug the inverter directly into a grounded outdoor or GFCI-protected outlet. Do not use extension cords or power strips unless the manufacturer specifically allows them.
- Stay within the size your state law and the manufacturer allow. Ideally use an outlet on a circuit that is not already heavily loaded.
- Secure panels against wind. Railing and wall mounts must be rated for the panel weight and your local weather.
- If you are unsure about your wiring, ask a licensed electrician to check the circuit.
Will it keep my power on in an outage?
Not on its own. A grid-connected microinverter is designed to switch off when the grid goes down. To keep things running in an outage you need a battery system with its own backup outlets. Our plug-in battery storage and home backup planning guides cover how to pair storage with plug-in solar.
How to choose a kit
- Size: match it to your baseline load and your state’s limit. For most homes, 400 to 800 watts is the sweet spot.
- Panels: rigid monocrystalline panels last longest. Bifacial panels can add a little output when mounted upright above a light-colored surface. Flexible panels are lighter but usually wear out sooner.
- Microinverter: check the certification, the maximum output, the warranty (10 years or more is a good sign) and whether an app shows your real production.
- Mounting: make sure the kit includes mounts for your railing, wall or ground, or budget for them. See mounting and setup.
- Battery option: if you are away during the day, a kit with a battery lets you use the power in the evening.
Compare current models in our balcony solar kit guides.
Getting more from every watt
Solar is only half of the picture. Running the dishwasher, laundry and EV charging in the middle of the day uses your solar power directly, and cutting waste lowers the load you need to cover. Start with a plug-in energy monitor to see what your home uses, then work through our energy savings guides.
Frequently asked questions
Can renters use plug-in solar?
Yes. It needs no permanent installation, so it suits apartments and rented homes. Check your lease and ask your landlord before mounting anything on railings or walls.
Do I have to tell my utility?
It depends on your state. Some plug-in solar laws remove the approval requirement for small systems, while others ask you to notify the utility. Check our state guides before you connect.
Will my meter run backwards?
Usually not. Most plug-in systems are sized so the power is used in the home. Some meters do record exported power, which is another reason to size the kit to your daytime load.
How long do the panels last?
Quality panels usually carry 25-year performance warranties. Microinverters typically carry 10 to 15 years, and batteries 10 years or a set number of charge cycles.