How a Solar Energy System Works. If you want a more environmentally responsible home, a natural step is to install a solar energy system. After all, the sun’s energy has been cleanly shining down on us in the Upper Rio Grande Valley for millions of years. Cytech Heating & Cooling carries 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 collect energy from the sun and convert it to electricity. Afterwards, the electricity can power appliances, lights and other electrical devices in your home – from your HVAC systems to your phone charger. Grid-tied PV systems If you’re located in or around the Upper Rio Grande Valley, you will want a grid-tied PV system. These are the least expensive solar energy systems, and they’re linked 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 at times 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 process is called net-metering. The backward spin lets you save on utility expenses that are determined by how far forward your meter has spun. You should note that most solar rebates and incentives are only available if your system is grid-tied. The second option is a stand-alone PV system, which costs more. Stand-alone systems are not linked to the utility grid and are nice options when your home is in a remote location, far away from a utility service or power lines. Cytech Heating & Cooling in the Upper Rio Grande Valley is happy to help with your solar energy system questions. Give us a call at 956-381-1162 or book an appointment online.