@Crissa @luciedigitalni @randahl if you want to the biggest saving, a heat pump for your hot water is the cheapest way to do it! They are even cost effective in sub zero temperatures.
When talking gas prices, the Australian experience is that there is this standing or connection charge in the bill that you pay regardless of the gas used. It means the best saving is when you convert all the gas appliances to electric.
@Lats @luciedigitalni @randahl
Connection fees aren't high in California but I'm on delivery so it doesn't matter - I'd have to get enough battery for four days in freezing weather which only happens once in a decade (but three times the last) so...
But yeah, I really want a heat pump water heater. Ours is a gas on-demand that has an extra port for recirculating so it could be augmented with another heat source!