On-grid solar systems are by far the most common and widely used by homes and businesses. These systems do not need batteries and use common solar inverters and are connected to the public electricity grid. Any excess solar power that you generate is exported to the electricity grid and you usually get paid a feed-in-tariff or credits for the energy you export.
Unlike hybrid systems, on-grid solar systems are not able to function or generate electricity during a blackout due to safety reasons. Since blackouts usually occur when the electricity grid is damaged; If the solar inverter was still feeding electricity into a damaged grid it would risk the safety of the people repairing the fault/s in the network. Most hybrid solar systems with battery storage are able to automatically isolate from the grid (known as islanding) and continue to supply some power during a blackout.
Batteries are able to be added to on-grid systems at a later stage if required. The popular Tesla Powerwall 2 is an AC battery which can be added to an existing solar system.
- Reduction in electricity costs and usage.
- The electrical grid will supply electricity whenever needed.
- Discount their current electricity rates, and reduce their environmental impact.
- Generate revenue from Solar Renewable Energy Credits (SRECs). In this case, the utility company will pay you for the electricity your home generates.
- The household or commercial property that benefits from the system is credited for the electricity generated by the solar panels.