Solar Energy Systems: How They Work. If you want a more environmentally friendly home, a “green” step is to purchase a solar energy system. After all, the sun’s energy has been cleanly shining down on us in Los Angeles County for millions of years. Temp Air System Inc offers the Lennox® SunSource® Energy System to help you create a greener, less oil- and gas-dependent home. But how does this system work? In a sentence: the system uses solar modules, made up of photovoltaic (PV) cells, to take in energy from the sun and convert it to electricity. Afterwards, the electricity can be used to power appliances, lights and other electrical devices in your home – from your HVAC systems to your TV. Grid-tied PV systems If you live in La Puente, you will 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 lets you 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. In addition, grid-tied systems enable your system to feed extra energy back into the grid, causing your meter to spin backwards. We call this process net-metering. The backward spin allows you to save on utility expenses that are decided based on 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. Another option is a stand-alone PV system, which is more costly. Stand-alone systems are not linked to the utility grid and are good options when your home is in a remote location, not near a utility service or power lines. Temp Air System Inc in La Puente is eager to help with your solar energy system questions. Give us a shout at 626-587-4559 or schedule an appointment online.