Hybrid (Grid interactive) photovoltaic (PV) solar power system.
A grid-interactive photovoltaic (PV) solar power system is a hybrid of the other two systems. It consists of the same general configuration as the off-grid solar power system, but it has the added benefit of drawing from the municipal supply if the battery storage or the photovoltaic (PV) solar power is insufficient. This system is the most common, because it allows home owners the benefit of having traditional grid electrical power available as a backup resource when the solar power system temporarily provides insufficient solar energy due to weather conditions.
An added benefit is that when the electrical power consumption is temporarily increased as a result of perhaps parties or extra visitors, and the circuits you have dedicated to the photovoltaic (PV) solar power system are temporarily depleted, the hybrid (grid interactive) photovoltaic (PV) solar power system will supply those circuits with the remaining electrical power required until the sun can replenish the supply again. The grid-interaction photovoltaic (PV) solar power system will work out approximately 20% more costly than the off-grid photovoltaic (PV) solar power system because the inverter required is more expensive.