First, I'm not an electrician. That said, I've spoken with several of them about this issue. One told me that if you are planning on running welders, hot tubs or powering up an RV sitting on the driveway, you need to have your service upgraded from 100 amp to 200 amp.

Also, I found this website for converters, looks like this may be a possibility for you.

https://www.110220volts.com/power/voltage-converters.html

Does anyone know if a 220v device pulls more amps than a 110v?