Solar Energy Systems: How They Work. If you want a more environmentally responsible home, a “green” step is to purchase a solar energy system. After all, the sun’s energy has been provided to us in Tuscaloosa for millions of years. KDM Service Corporation offers the Lennox® SunSource® Energy System to help you create a home that relies more on natural energy and less on oil and gas. So how does this system work? Put simply, the system uses solar modules, made up of photovoltaic (PV) cells, to collect energy from the sun and convert it to electricity. Afterwards, the electricity will power appliances, lights and other electrical devices in your home – from your HVAC systems to your computer. Grid-tied PV systems If you live in Tuscaloosa, you will want a grid-tied PV system. These are the most affordable solar energy systems, and they’re linked to your utility company’s power grid – hence the name grid-tied. This enables you to use solar energy from your system when the PVs are collecting energy and use electricity from the grid at night, or when the system isn’t gathering energy. Additionally, grid-tied systems allow your system to feed surplus energy back into the grid, which will make your meter spin backwards. This is the process of net-metering. The backward spin allows you to save on utility expenses that are determined by how far forward your meter has spun. It’s important to note that most solar rebates and incentives are only available if your system is grid-tied. The other option is a stand-alone PV system, which is more costly. Stand-alone systems are not tied to the utility grid and are good options when your home is in a remote location, or too far a distance from a utility service or power lines. KDM Service Corporation in Tuscaloosa is eager to help with your solar energy system questions. Give us a call at 205-758-2703 or schedule an appointment online.