Solar Energy Systems: How They Work. The sun is already giving off huge amounts of energy. Why not put it to work in your own home? With the Lennox® SunSource® Energy System we offer at Controlled Comfort HVAC Inc in Carpentersville, you can limit your dependence on oil and gas and see lower utility bills. So how exactly does it work? The most basic way to explain a solar energy system is that the system uses solar modules made of photovoltaic (PV) cells to take in 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 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. At times when the system isn’t generating 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 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 easier to afford 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 linked to a utility grid and provide for all of a home’s energy needs. Ready to go solar? Call Controlled Comfort HVAC Inc at 224-699-9229 or create a meeting online. We’re available to help with all your Carpentersville area solar energy system needs.