Windy, Bred, DR-Guy,
About 90 volts AC is the cut off for reasonable operations, so at 70 + AC the invertors should have cut in. Ours did not and we had brown out for a few miniues. We cut street power and the invertor kicked it. Many generators locally did not cut in and we saw others trying to start their genrators only for it to cut out with the Edenorte voltage being about 70 VAC +
Fisrt time I have seen this type of problem on the north coast as usually it is all or nothing.
Olly and the Team