Solar export limiting is where your local electricity provider sets a limit on the amount of energy your solar system can export into the grid.
Typically, this is around 5KW. You have a set limit on how much energy you can export (‘sell back’) to the grid.
A lot of Australian homes are not allowed to ‘sell back’ more than 5KW of their energy to the grid. So if you are looking for a system that is bigger than 5KW, then you may get hardware installed that limits your solar inverter from over exporting to the grid.
The reason why solar export limiting is in place is due to so many homeowners being able to produce their own energy. This means on a very sunny day lots of homes are producing a surplus of excess energy which will get sent to the grid and electricity lines. Most of these lines are old and were built years ago.
When too much energy gets sent at one time it results in power surges and issues. There is also a drop in the quality of the electricity as well.