Quick Answer
Yes, you can use solar power while connected to utility, through solar grid tie systems that automatically feed excess energy back into the grid and allow you to draw power from the grid when needed. This setup is ideal for households with variable energy demands. It also helps utilities manage energy distribution and reduces strain on the grid.
Understanding Solar Grid Tie Systems
Solar grid tie systems are designed to seamlessly integrate solar power with the utility grid. These systems use an inverter to convert DC power from solar panels into AC power that matches the frequency and voltage of the grid. This allows you to sell excess energy back to the utility and draw power from the grid when needed.
Benefits of Solar Grid Tie Systems
The benefits of solar grid tie systems include reduced energy bills, increased energy independence, and the ability to sell excess energy back to the utility. For example, if you have a 5 kW solar array and a 3 kW inverter, you can generate up to 5 kW of power, but you can only sell back to the utility the excess power that the inverter can handle, which is 2 kW. This excess power is typically sold back to the utility at a rate of $0.15 per kWh or more, depending on your location.
Installing a Solar Grid Tie System
Installing a solar grid tie system requires careful planning and consideration of your energy demands and available space. A typical system consists of solar panels, an inverter, a mounting system, and electrical connections. To ensure a smooth installation process, it’s recommended to hire a licensed electrician or a solar panel professional. A standard 5 kW solar grid tie system can be installed for around $15,000 to $20,000, depending on the location and equipment costs.
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