The on grid solar system is tied to your local utility’s grid. This is the most common system that is used in residential settings. In the case of load shedding, maintenance, and grid faults, their system will not be protecting the customer from power outages. Customers looking to protect themselves against these should consider a battery backed system. However, these systems are currently very expensive (1.5X of the price of a system without a battery) and require battery replacement every 5 years which make them unfeasible from a financial perspective.