Solar panels are becoming more and more common across the UK, appearing on homes, businesses and even large-scale solar farms. But how do solar panels actually work, and how do they turn sunlight into usable electricity?
In this guide, we break it down in simple terms so you can understand exactly how solar energy powers your home.
What Is the Photovoltaic Effect?
At the heart of solar panel technology is something called the photovoltaic effect.
The word comes from:
- “Photo” meaning light
- “Voltaic” meaning electricity
When certain materials are exposed to sunlight, they generate an electric current. This is how solar panels produce electricity.
Most solar panels are made from silicon, a semiconductor material that reacts when exposed to sunlight.
How Do Solar Panels Generate Electricity?
Solar panels are made up of individual units called solar cells.
Each solar cell has two layers:
- A negatively charged layer
- A positively charged layer
When sunlight hits the panel, it energises electrons within the silicon. These electrons begin to move, creating a flow of electricity.
This movement of electrons is what generates power.
DC vs AC: How Solar Power Becomes Usable
The electricity produced by solar panels is known as Direct Current (DC).
However, homes in the UK use Alternating Current (AC).
To make solar energy usable in your home, an inverter is installed. This converts DC electricity into AC electricity so it can power your appliances.
What Happens to the Electricity You Don’t Use?
One of the most common questions we get is:
“What happens if I generate more electricity than I use?”
There are two main options:
- Export it to the grid (you may receive payments through a SEG tariff)
- Store it in a battery to use later in the evening
Many homeowners now add battery storage systems so they can use more of their solar energy rather than buying electricity from the grid later on.
Are Solar Panels Worth It in the UK?
Solar panels can significantly reduce your electricity bills, especially if you use energy during the day or combine your system with a battery.
With energy prices continuing to fluctuate, solar gives homeowners more control over their energy costs and reduces reliance on the grid.
Thinking About Installing Solar Panels?
At Solar Voltaics, we design and install high-performance solar systems across Hampshire and the South Coast.
If you’re considering solar for your home, we’re happy to provide a free consultation and show you how much you could save.
👉 Get in touch today to find out more.
