Solar panels are not designed to work alone during a power outage. In the case of blackouts, a standard grid-connected solar system is programmed to switch-off to prevent the extra energy from being sent to the power line.
This is a safety mechanism to ensure no power from your panels can affect anyone working on the power lines.
But the beauty of being with Plico is that you also have a battery! During a grid outage, you will be able to use any stored energy available from your battery.