Solar Energy Systems: How They Work. The sun is already generating huge amounts of energy, which is exactly why you should put it to use in your home. With the Lennox® SunSource® Energy System we offer at Nisair Air Conditioning in Stuart, you can cut down on your dependence on oil and gas and reduce 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 composed of photovoltaic (PV) cells, to gather energy from the sun and convert it to electricity. This electricity is used to power light, appliances and electrical devices in your home. Grid-tied PV systems Grid-tied PV systems are the most common and least expensive for residential solar systems. The SunSource Energy System we offer is grid-tied, and that means it’s connected to your utility company’s power grid or power stations. Grid-tied allows you to use your solar energy system to power your home. When the system isn’t creating electricity, your home will be able to use power through the utility grid. And, 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 SunSource System’s electricity is going 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 another option for those in remote areas without utility service, however they’re much more expensive. A stand-alone system is not tied to a utility grid and provide for a home’s entire energy consumption. Ready to go solar? Call Nisair Air Conditioning at 772-318-4252 or schedule a consultation online. We’re ready to help with all your Stuart area solar energy system needs.