Basically it is a solar power system that is off the grid thus the term off grid.
On grid and off grid solar system difference.
Off grid power system does not have any connection with the grid.
However there are disadvantages because off grid systems require you to purchase back up battery which can be expensive bulky and not very environmentally friendly which defeats the purpose of going solar save money and live greener.
The only difference is the battery backup.
The benefit of this system is to generate a side income which would be very beneficial for consumers and provide incentives to switch to solar power.
An off grid system can also be called a stand alone solar power system.
The entire electrical load will be powered by solar alone.
This system will create its own solar microgrid.
Off grid solar systems require specialised off grid inverters and battery systems large enough to store energy for 2 or more days.
Rv solar kits are a grid example of off grid solar.
It works independently from the any utility power grid.
The working of the on grid system and off grid system is the same.
This drawback is converted into an advantage in the off grid solar system.
Hybrid grid connected systems use lower cost hybrid battery inverters and only require a battery large enough to supply energy for 5 to 10 hours overnight depending on the application.
An off grid solar energy system is not connected to the utility grid whereas an on grid aka grid tied solar energy system is connected to the utility grid.