Solar panels turn sunlight into electricity you can use at home. The concept is simple, and understanding it helps you make a smarter buying decision. Here is the plain-English version.
The Basics, Step by Step
- Panels capture sunlight. Solar cells (usually silicon) absorb sunlight and generate direct-current (DC) electricity.
- An inverter converts it. Your home uses alternating current (AC), so an inverter converts the DC into usable AC power.
- Your home uses it first. The electricity powers your home in real time, reducing what you pull from the grid.
- Extra power goes to the grid (or a battery). What you do not use is sent to the grid for credits (net metering) or stored in a home battery for later.
- You stay connected to the grid. At night or on cloudy days, you draw from the grid or your battery, so you always have power.
What a Full System Includes
- Solar panels on your roof (or ground).
- An inverter (string inverter or microinverters) to convert the power.
- Mounting and wiring.
- A meter for net metering.
- Optional: a battery for backup power and storing your own solar.
Do Solar Panels Work on Cloudy Days?
Yes, just less. Panels still produce power in cloudy or overcast weather, though at reduced output. Your system is sized around your yearly usage, so seasonal dips are expected and accounted for.
How Long Do They Last?
Most panels are warrantied for 25 years and keep producing well beyond that, with only a gradual decline in output. See maintenance and lifespan.
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FAQ
Do solar panels work at night?
No. At night you draw from the grid or a home battery. Panels only produce while the sun is up.
What is the inverter for?
It converts the DC electricity from the panels into the AC electricity your home and appliances use.
Related
General 2026 guidance.