Electric water heating

To change to 240V would be a lot of work as most if not all RV electric panels do not have 240 available. You would have to change to a house panel and then upgrade the wire from the breaker to the water heater

Hi,

I'd rather go down from the 1400 watt. Recovery time is, for me, a non issue. I've used the propane side twice since 2009. I have a ten gallon unit.

From ambient to first cycle takes about 90 minutes. If no water is drawn it appears to cycle every 4 hours and takes 15 minutes of "on" time.

OK to run on propane at the same time for fastest recovery. (assuming you have propane)
Also there is an RV tankless W/H available for continuous hot water.
I have not replaced the element.

Atwood uses a 1400W element......use to use a 1500W but went to 1400W to lower the amp draw
Suburban uses a 1440W element

RV Water Heater electric elements are fed by a 15A CB
As you stated ....Wiring & CB changes would be necessary

So NO....
Doubt anyone has done that as it is not that much of an improvement (cost/benefit)

1400/1440W element have a recovery time of roughly 6.2 gal/hr (based on initial 70*F water temp) ---even shorter time for reheat cycle (from 100*/110*F water temp)
Want faster recovery time.turn electric & propane on at same time (16.2 gal/hr ---70*F water)

Want hot all the time.....leave electric ON