Using RV generator as a backup generator for the house?

Before you spend any $ on transformers etc. why not look at buying a real backup generator. If you already have the transfer switch you probably already have propane or nat. gas also. They have gotten very affordable.

3600 watts is barely going to kick on your well pump if it is more than 1/2 hp.
I tried doing the same thing with a 4400 watt 240V and it does not work well except for short duration.

Just a thought. Good Luck