A photovoltaic (PV) module
A photovoltaic (PV) module consists of PV cells wired and mounted together, which produce a designed voltage and current when exposed to sunlight.
An electrical load
An electrical load is a device such as a computer, diswasher, or refrigerator that uses either ac or dc electricity to operate.
A PV direct system
A PV direct system is the simplest type of PV system, consisting of only a PV module and a dc load.
A battery
is a chemical energy storage device for dc electricity.