Just got my (mostly) December utility bill: $350 for 1971kwh. That will probably be the biggest bill of the year, it's been a very cold December. We're on a 'net metering' plan though, so our electricity is only billed annually - prior to that it's just costs and credits. Our bill in July was -$400, so the summer credits balance out the winter costs. I don't expect we'll owe anything at true-up time.

I should also mention that we have a 1BR apartment downstairs that we rent out, so this is usage for 2 households, each with electric kitchens, heat pumps, laundry, etc. Our usage would be lower without a tenant downstairs.

As for total costs, it's hard to say because so much of it was part of other major renovations to the house. We redid all the electrical in the house as part of that, which would normally not be necessary just to upgrade a couple of appliances. Things that might be necessary is upgrading your main electric panel to a higher capacity (going from 100a to 200a for example, which would cost around $8-10k). Cost of the appliances themselves are a big variable. Our main heat pump was $15k, but a lower model would have been more like $10k. The water heater was $2k (again, you could get a cheaper one).

Solar panels were installed in two systems a few years apart.

In 2017 my 6kw system cost $24,000 before any incentives (by SolarCity).

In 2020 my 7.8kw system cost $15,000 before any incentives (by Tesla).

After tax credits those two probably cost net <$30k.

The Tesla Powerwalls are being paid for entirely by the state of California SGIP program (which depending on your situation will cover about 30% or the full cost). Without that program they would have been in the $20k range.