Solar Energy Systems: How They Work. If you want a more environmentally responsible home, a natural step is to purchase a solar energy system. After all, the sun’s energy has been provided to us in Central Texas for thousands of years. Bell Air Conditioning Inc. sells the Lennox® SunSource® Energy System to help you create a home that relies more on natural energy and less on oil and gas. But 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. Then, the electricity can 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 Belton, you’ll probably want a grid-tied PV system. These are the most affordable solar energy systems, and they’re tied to your utility company’s power grid – hence the name grid-tied. This allows you to use solar energy from your system when the PVs are collecting energy and use electricity from the grid when the system isn’t gathering energy. Additionally, grid-tied systems enable your system to feed additional energy back into the grid, at which time your meter will spin backwards. We call this process net-metering. The backward spin allows you to save on utility expenses that are determined by how far forward your meter has spun. Please note that most solar rebates and incentives are only available if your system is grid-tied. Another option is a stand-alone PV system, which is more expensive. Stand-alone systems are not linked to the utility grid and are fine options when your home is in a remote location, not near a utility service or power lines. Bell Air Conditioning Inc. in Belton is happy to help with your solar energy system questions. Give us a call at 254-307-9572 or set up an appointment online.