Solar

Let’s say you have a rooftop solar system. It generates 10 units (kWh) of electricity during the day, but you only consume 8 units for powering your various devices/appliances. You are left with 2 excess units. What do you do with them?  You can either let them go waste, store them for future use [...]

The first conventional photovoltaic cells were produced in the late 1950s, and throughout the 1960s were principally used to provide electrical power for earth-orbiting satellites. In the 1970s, improvements in manufacturing, performance and quality of PV modules helped to reduce costs and opened up a number of opportunities for powering remote terrestrial applications, including battery [...]