Is your $0.30-0.40/kwh rate based on your Solar cost?
The non-solar rates[1] in Bay Area right now range starting from $0.42/kwh on tiered plan which you will blow through if you elect heat-pump heating and going all the way to higher than 50 cents per KWh if you are on one of the Time of US plan.
As much as i love the efficiencies offered by heat pumps, unless i splurge $10-$20k on a solar system with a battery backup, heat pumps are too expensive to operate with CA electrical rates.
My gas(which i use for heating) during same period cost $2.54 per therm, although i dont know how to compare it to kwh for heating purposes.
Update: I just checked my electrical bill for January.
My total cost for generation and delivery of 478 kwh which is what my household used in 32 days, cost me $209 after fees and taxes which makes my rates around 44 cents per kwh on average.
> Is your $0.30-0.40/kwh rate based on your Solar cost?
It's just out of date from the math I did two years ago, I should have mentioned that.
> heat pumps are too expensive to operate with CA electrical rates.
It depends on your furnace. Typically it's going to be 80AFUE. $2.54/therm is $0.087/KWh-gas. If you pay $0.42/KWh-electricty, a heat pump with a COP >= 3.7 saves you money. Heat pumps with COPs above that at bay area temperatures are widely available.
If you have a 96AFUE furnace, the necessary COP is 4.6. That's a lot harder to find: I'm no expert on the heat pump market, but it seems like the standard units are mostly 3.5-4.0. I can find mini splits up to 4.5 (like [1]), but they're more expensive.
The non-solar rates[1] in Bay Area right now range starting from $0.42/kwh on tiered plan which you will blow through if you elect heat-pump heating and going all the way to higher than 50 cents per KWh if you are on one of the Time of US plan.
[1]https://www.pge.com/assets/pge/docs/account/rate-plans/resid...
As much as i love the efficiencies offered by heat pumps, unless i splurge $10-$20k on a solar system with a battery backup, heat pumps are too expensive to operate with CA electrical rates.
My gas(which i use for heating) during same period cost $2.54 per therm, although i dont know how to compare it to kwh for heating purposes. Update: I just checked my electrical bill for January.
My total cost for generation and delivery of 478 kwh which is what my household used in 32 days, cost me $209 after fees and taxes which makes my rates around 44 cents per kwh on average.