Solar lamps operate based on the conversion of sunlight into electrical energy, which is then utilized for illumination. The entire system is environmentally friendly. PV systems can also be installed in grid-connec ed or off-grid (stand-alone) configurati gh a process called the photovoltaic effect. Solar panels harness sunlight, 2. The fundamental operation begins with solar. A solar lamp (or solar light) is a lighting device that uses solar energy instead of grid electricity. At night, an electronic controller supplies this stored energy to a high-efficiency. The principle of solar energy-saving lamps revolves around three core components: 1.