Short answers with links to the full guides.
Basics
What is plug-in solar?
A small solar system, usually one to four panels with a microinverter, that plugs into a normal outlet and powers your home’s circuits. Beginner’s guide.
How much power does it make?
An 800 W kit produces roughly 450-1,350 kWh a year depending on location and mounting. Production table.
Does it work on cloudy days and in winter?
Yes, at reduced output. Details.
Can I run my appliances directly from it?
You don’t need to. It feeds your circuit, and whatever is running uses it first. How it works.
Legal
Is it legal where I live?
In Germany and much of Europe, yes. In Great Britain since 27 August 2026. In nine US states with laws. Elsewhere it depends. Law tracker.
Do I need to tell my utility?
Depends: Virginia and Maryland require notification; New Jersey and Utah do not; Germany requires MaStR registration. What the laws share.
Can my landlord say no?
In most places yes, but some states limit this. Landlord guide.
Money
How much will I save?
Typically $80-300 a year for an 800 W kit, depending mostly on your electricity price. By state or use the calculator.
How long is the payback?
Roughly 3-10 years. Payback explained.
Will I get paid for power I export?
Usually not. Meters and exports.
Are there tax credits?
The US federal credit expired at the end of 2025. Incentives in 2026.
Safety and installation
Is it safe?
Certified kits used correctly are designed to be. The risks come from shortcuts. Safety guide.
Can I use an extension cord?
No. Here’s why.
Do I need an electrician?
Usually not for the kit itself, but yes for a new outlet, old wiring, or where the law requires it. When to call one.
Which way should the panels face?
South is best (north in the southern hemisphere); east and west work too. East vs west.
Batteries and backup
Do I need a battery?
Most people don’t. How to decide.
Will it keep my lights on in a blackout?
Not a standard kit. Backup options.
Buying
Which kit should I buy?
Start with one that is certified for your region and fits your space. Buyer’s guide and UK kits.
Can I take it with me when I move?
Yes. How to move it.
More questions
How long do panels last?
Good panels last 25-30 years, losing roughly 0.3-0.5% of output a year. Microinverters are usually warrantied for 10-15 years.
Do I need to clean the panels?
Vertical panels stay fairly clean; tilted ones need occasional rinsing. Cleaning guide.
Can I install it on a rented balcony without drilling?
Yes, with clamp or strap systems. No-drill mounts.
Will it work with my smart home?
Many inverters have apps and local interfaces. Home Assistant setup.
What if it produces less than expected?
Work through our low-output checklist.
Do I need to tell my insurer?
Yes, it’s quick and avoids disputes later. Insurance tips.