From: Harold Hallikainen <harold@mai.hallikainen.org>
To: "piclist@mit.edu" <piclist@mit.edu>
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Date: Fri, 13 Aug 2021 12:07:49 -0700
Subject: Re: [OT]:: Australian example of real world cost of replacing coal
	power stations with Wind Power + Pumped hydro storage.
Thread-Topic: [OT]:: Australian example of real world cost of replacing coal
	power stations with Wind Power + Pumped hydro storage.
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As I read the article, it dealt just with wind and pumped hydro storage.
It talks about "wind droughts." I wonder how solar works out. It is true
that solar only generates during the day, but that is also when the peak
load is. Perhaps wind and pumped storage only has to cover overnight
demand. Also, I wonder how solar and wind production smooth out over a
large area. Can transmission from high output areas cover low output
areas?

As others have pointed out, although this is going to cost, it appears to
be a necessary cost.

We just moved from Colorado to Arizona. Our new house came with a 3.3 kW
PV system. I have been tracking its output, energy pulled from the grid,
energy returned to the grid, overall consumption, etc. I'm calculating the
percentage of the consumption that is produced by our PV system and
graphing this against average temperature. The scatter chart is truly
scattered, but there is a trend of more produced from solar as average
temperature drops. It will be interesting to see how this turns out as we
move into cooler months.

The data is at
https://docs.google.com/spreadsheets/d/19giqOPOe9ndTAUYnzJ5buOJ73fufFAcnHDl=
5cWR-Zws/edit?usp=3Dsharing.

Harold




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