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Gas?
I guess you missed my point that gas or propane are carbon emitters. Electricity tied to grid tie solar is not for the most part except when you aren't generating and even then your excess power generation that you sell creates an offset because others get to use it.
Energy is energy and heating water takes a fixed amount of it all other things being equal. Unfortunately electrical resistance water heating is not a great idea because heating water takes a lot of energy and it could use up a great deal of PV capacity unless you are using excess capacity for that purpose explicitly.
This is what is making the heat pump water heating process so lucrative from my point of view. Using 3.5 times less electrical energy to heat the same amount of water with the saved power being used to charge an efficient EV seems like a win win to me unless I am missing something.
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