Propane of Electric to heat H2O whilst Full-Time

Hi,

Here is a cost comparative calculator:

http://www.maxmcarter.com/fuels/fuelscalc.html

I turn mine on electric in the morning. By breakfast time there is enough warm water to do the dishes. After 90 minutes I shut it down. That provide enough warm water for dishes for the rest of the day, and hand washing.

Because I don't like the idea of burning up my propane 24/7, I only turn my water heater on when I'm about to use it. I would likely let it run if I was on electric.

We do not have the option, propane only.
If I had the option, I would use 120 volt option if I were not paying for power.

Electric when plugged in (rare) and propane otherwise. Propane seems faster and it’s cheaper than paying for an electric site.