Meat Plow wrote:

I don't think you understand the principals of demand or load well
enough.

blink Where did you get that from?

A normal 1000VA unit would not usually have sufficient storage to
provide anything approaching 1000VA for an hour. So unless it's a
specially high capacity unit, the fact that it can supply its actual
load for an hour suggests that that load is nothing like 1000VA.

Sylvia.