Hmmm
Only had shore power once, it was 100 degrees and our single stage converter tried its best to cook my poor battery. It did ok for a season using the generator but it was easy to see the difference in the resting voltage the next day between a fully charged battery and one that has had a two hour run of the generator every day. Now that we are on solar the resting voltage is even higher the next morning because the needs were being covered, not draining the battery from the time the generator stopped running. The converter went off line a few years ago and the generator runs the roof top air much easier because of it. ( the solar charge controller is 3 stage of course)