Solar Energy Systems: How They Work. The sun is already expelling huge amounts of energy, so why not put it to use? With the Lennox® SunSource® Energy System we have available at KDM Service Corporation in Tuscaloosa, you can limit your dependence on oil and gas and lower your utility bills. But how exactly does this happen? The easiest way to explain a solar energy system is that the system uses solar modules, which are composed of photovoltaic (PV) cells, to gather energy from the sun and convert it to electricity. This electricity powers light, appliances and electrical devices in your home. Grid-tied PV systems Grid-tied PV systems are very common and the most affordable for residential applications. The SunSource Energy System we have available is grid-tied, meaning it’s connected to your utility company’s power grid or power stations. Grid-tied enables you to use your solar energy system to power your home. On occasions when the system isn’t generating electricity, your home will be able to use power through the utility grid. In addition, when your system produces an excess amount of electricity, it will be fed back into the grid through a process called net-metering. With net-metering, your meter spins forward if you’re using electricity from the grid and backward when you’re feeding electricity from your SunSource System back into the grid. *Note: Most rebates and incentives that make a solar energy system less costly are only available when your system is grid-tied. Stand-alone PV systems are an alternative for those in remote areas without utility service, but they cost a lot more. A stand-alone system is not tied to a utility grid and provide for a home’s entire energy consumption. Ready to go solar? Call KDM Service Corporation at 205-758-2703 or schedule an appointment online. We’re ready to help with all your Tuscaloosa area solar energy system needs.