Solar Energy Systems: How They Work. The sun is already expelling massive amounts of energy, so why not put it to use? With the Lennox® SunSource® Energy System we carry at Air Houston Mechanical LLC in Humble, you can cut down on your dependence on oil and gas and lower your utility bills. But how does it change from sunlight to energy? The easiest way to explain a solar energy system is that the system uses solar modules, which are made up 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 carry is grid-tied, which means 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. When the system isn’t creating electricity, the utility grid will supply power to your home. Additionally, when your system produces more electricity than you will use, 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 more affordable are only available when your system is grid-tied. Stand-alone PV systems are also available for those in remote areas without utility service, however they’re much more expensive. A stand-alone system is not connected to a utility grid and provide for a home’s entire energy consumption. Ready to go solar? Call Air Houston Mechanical LLC at 832-777-1521 or create a consultation online. We’re able to help with all your Humble area solar energy system needs.