An inverter is an electronic device that converts direct current (DC) into alternating current (AC). It is necessary when you want to power any electronic equipment.
An inverter/charger is an inverter that can also recharge a battery bank using a generator or the grid.
A hybrid inverter is an inverter that can feed energy back into the utility grid and draw power from a battery bank.
The power of an inverter is a testament to the amount of direct current it can transform into alternating current. So the more powerful an inverter, the more electricity it can convert during operation.
It is important to properly size the inverter in a solar power system so that it can meet all of your energy needs.