Inverters with these features enabled
Your utility needs to allow it though and many are behind the times. When I worked for the POCO 10 years ago I tried to implement policies to accommodate SA functions coming down the pike. Its just starting to get pushed in our area by the local ISO.
I do still point to the first comment though, this is a good reason to keep your V drops low - though the solution for pollution is dilution, its better to keep it clean on install and react to anomalies vs diluting the issue with pf correction. We also shoot for 1%, not 2%, which is usually obtained by simply using all the same size conductor (but varying # of parallel runs) for larger chunks of the system when practicable to do so - i.e. don't spec out 4 different sizes of conductors, it'll be cheaper to slighting upsize some runs for the installer to buy a larger reel that covers the whole site, and ends in less change of error when interpreting your wiring schedule.
You aren’t charged for PF on your meter anyway.
That isn't necessarily true, plenty of my customers are; however, providing leading VARs would usually help your bill if anything because you are usually penalized for lagging PF from inductive (motor) loads. Also, its not at no loss, nothing is free; however, I have noticed the next version of inverters I have seen come out this year have a higher kVA than kW output @ unity, allowing additional capacity when providing VARs to the system. For instance the new SMA is 62.5kW at unity and 66kVA when providing volt/var support.