Solar Energy Systems: How They Work. If you want a more environmentally friendly home, a “green” step is to install a solar energy system. After all, the sun’s energy has been cleanly shining down on us in San Angelo for hundreds of years. Air-Dynamics Inc 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? In a sentence: the system uses solar modules, made up of photovoltaic (PV) cells, to harvest 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 San Angelo, you’re likely going to want a grid-tied PV system. These are the least costly solar energy systems, and they’re tied 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 when the system isn’t gathering energy. In addition, grid-tied systems let your system feed additional energy back into the grid, causing your meter to spin backwards. We call this process net-metering. The backward spin helps you 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 costly. Stand-alone systems are not connected to the utility grid and are good options when your home is in a remote location, far away from a utility service or power lines. Air-Dynamics Inc in San Angelo is happy to help with your solar energy system questions. Give us a buzz at 325-655-2515 or set up an appointment online.