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In modeling whether this makes sense, I looked at my annual electricity bill, which comes in at about $1,800/year. That's not enough savings opportunity to just
by 11thEarlOfMar 9y ago
In modeling whether this makes sense, I looked at my annual electricity bill, which comes in at about $1,800/year. That's not enough savings opportunity to justify a ~$70,000 roof+batteries.
However, when I add 2 electric cars, the savings nearly triple [0]. Instead of buying gasoline, I'll be paying for electricity.
At $5,400/year, spending $70,000 starts to make some sense.
On the other hand, if I put up ugly panels and still use the Tesla batteries, aren't I going to save a lot more?
[0] 24,000 miles/year, 225 miles @ $10 per charge, vs. 25 mpg @$3/gal
EDIT: Corrected KWh charge... $10 is cost for one charge.
- ch4ch4 9y agoIn your calculation, $10/kWh is a bit high... the national average is $0.12/kWh
- 11thEarlOfMar 9y agoCorrected (thanks for being kind...)
- deegles 9y agoWhat's your goal though? If it's just to save money then it makes more sense to drive a beater gasoline car. If the goal is to help the environment, it's probably still better to buy a beater gas car and buy carbon credits with the difference. Also there are tons of other things you can do like downsizing, eating less meat, biking to work, etc.
- RodericDay 9y agoTesla's entire offering is trickle-down environmentalism.
- thatwebdude 9y agoKeep in mind, a battery array isn't something patented by Tesla, you could easily (safety in mind!) create a "powerwall" yourself; or use someone else's.