Off-Grid System

An off-grid system carries the whole load on its own. There is no grid to fall back on, so the battery and the panel array both have to be sized for the worst week of the year, not the average one.

That makes it the most expensive way to buy solar per unit generated, and it is the right answer only when there genuinely is no connection — a farm pump, a borewell, a site office, a house where the line has never reached.

If you have a connection and it is simply unreliable, you want the hybrid system, not this one.