In reply to bobcook39...@hotmail.com's message of Mon, 5 Mar 2018 16:41:49 +0000: Hi Bob, >Jed > >My rooftop inverters do not work unless there is a signal from the grid of the >appropriate frequency and voltage. [snip] Thanks for explaining that. I had heard that rooftop solar was turned off during a power outage, but never really understood why.
Yet it would appear a simple enough matter to design inverters with a built in signal source that simply synchronizes with the grid frequency when it is present. Given the low cost of electronics nowadays, it should add very little to the cost of an inverter. Regards, Robin van Spaandonk local asymmetry = temporary success