In some areas (currently in California), the meter measures both production and export, and the consumer is charged (or credited) for net electricity used over a month or year period. In some states, meters measure all solar electricity produced by your system, and therefore your electricity will run through your meter before reaching the switchboard and not after it. In this description I am assuming that the meter is only measuring the electricity being exported to the grid, as is the case in most of Australia. Metering systems work differently in many states and countries around the world. Excess solar energy runs through the meter, which calculates how much power you are either exporting or importing (purchasing). In an on-grid system, this is what happens after electricity reaches the switchboard: The Tesla Powerwall 2 is a popular AC battery system which can be added to an existing solar system.
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.īatteries are able to be added to on-grid systems at a later stage if required. 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. Unlike hybrid systems, on-grid solar systems are not able to function or generate electricity during a blackout due to safety reasons. Any excess solar power that you generate is exported to the electricity grid and you usually get paid a feed-in-tariff (FiT) or credits for the energy you export. These systems do not need batteries and use either solar inverters or micro-inverters and are connected to the public electricity grid. On-grid or grid-tie solar systems are by far the most common and widely used by homes and businesses.
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