Background on fixed solar costs

Continuing the discussion from Clean energy for Poland:

This needs its own topic.

Good find. 200 kilowatt hour installed by Tesla for a commercial unit is a big deal.

100 kilowatt hour installed with the round trip efficiencies reported makes this a no brainer. At 200 per kilowatt hour, California at 36 cents a kilowatt hour and peaking at twice that is a done deal.

This is an important article with important numbers .

“” There are still some information gaps here that would help provide a more thorough comparison of these energy storage systems, but here are some core conclusions:

  • The Tesla Megapack now comes at a cost of <$200/kWh, or ~$300/kWh with power electronics and servicing included, per Elon Musk’s comments to me today.
  • That’s well below what recently seemed to be a new low price of $539/kWh for the Tesla Powerpack.
  • A Tesla Powerwall now costs $518.52/kWh, up from $481.48/kWh earlier this year, but that does not include the cost of the Tesla Gateway or installation.”

I calculated years ago, the cost for electricity was about 10 cents a kilowatt hour with peaking running to maybe 35 cents on average. This was a time of low natrual gas prices and it was the mid west.

I just read here, rhat California is seeing 36 cent a kilowatt hour with peaking running to 76 cents. At these prices when you remove the capital costs for back up
generators and get the ability to either time shift electricity or eliminate the grid completely, California is a makes the cut for a 5 year return on investment. ,

Considering that only about 6 countries in the world have a larger GDP than California and California makes up almost 20 percent of this country’s GDP, that is a really big market.



Nice find!

Others here may be confused by their electric bills. I pay 12 cents per kWh. But that does not included the delivery charge which is the larger part of the bill. My 12 cents is locked in for the year till Jan 2024. With the elections happening we have not got the news on how high our costs will go. I suspect 15 cents…plus delivery…

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Where are you?

I just looked at my bill here in North West Florida, but I am guessing it is about 15 to 17 cents a kilowatt hour all up including the fuel surcharge, connection fees and taxes. Stripped down to just the electricity, it is about 14.5 cents a kilowatt hour.

We do not have peaking charges and we are on no type of peaking plan like they have inTexas and I assume that they have in California. Of course commercial bills are significantly different. This difference that I do not have a window into is what I am thinking will make battery plus solar a big deal in high cost, high peaking charge areas.

I have heard rumors over the years, but I suspect that the tariffs have changed a lot over the last 20 years so I am simply do not know what the commercial system looks like.


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I am in CT. Our main supplier is Eversource. The workers are heavily unionized. The management pays itself a lot. We have trees on the lines everywhere.

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Just looked at our bill. We are on a fully-renewable plan and live north of Austin, Texas. Our base power costs 4.45c per kWh. Delivery is 2.84c, a “pass through” charge of 1.69, and a “temporary” storm surcharge of .7c. Add a constant service availability charge and a constant city franchise fee on top of that. It’s cheap, but it’s not the reliability I want.

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