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Photovoltaic efficiency is the ability of a solar cell to convert sunlight into electrical energy. Higher efficiency means that more sunlight is converted into usable energy, which can reduce your electricity bill and the carbon footprint of your installation. There are several ways to improve the efficiency of your solar cells, such as using high quality solar cells, optimising the orientation and tilt of your PV system, and using inverters and monitoring tools to maximise the output of your system.