Solar panels are devices, which come in a variety of rectangular shapes, designed to absorb sunlight as a source of energy and convert it to electricity or heat. These usually come with a photovoltaic module that generates and supplies solar electricity in commercial and residential applications.

Based on the simplest explanation on how these devices work, a solar panel uses photons (light particles) to knock electrons free from atoms, generating a flow of electricity. Solar panels are composed of smaller units called photovoltaic (the ability to convert sunlight into electricity) cells, which are basically made up of two slices of semi-conducting material, usually silicon.

To sum it up, solar panels are essential because they provide pollution-free power sources, reduce air pollution from coal power plants, conserve resources, preserve habitats affected by mining, reduce the need for nuclear power, lessen financial costs of electricity and generate energy independence.

One of the few things to consider when buying solar panels is charging power or power ratings. So, check carefully the list of compatible devices, how fast the charging time is or if it is charging from the reserve battery or directly, how much power it can provide in a day or how many devices it can charge simultaneously.