Quote:
Originally Posted by Stormer
For those who keep saying telling us that batteries are the solution to the renewable energy intermittency, just look at the metrics of this project. I don't think we are close yet. Assuming the batteries are drawn down and charged twice each day and the batteries last 10 years, the extra cost of the electricity released from the batteries would be over 23 cents per KWH. This of course does not include the actual cost of generating the electricity and does not include any operating costs, which should be fairly low.
I do not know if my assumptions are correct, but this seems like more a demonstration project than a real business model.
https://regina.ctvnews.ca/saskpower-...gina-1.6951450
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Your looking at it from the perspective that this is a regular source of power. This is something that should rarely be used when other lower cost sources or power are not available.
For example, any grid has a number of peeking stations that most of the time are off and only come online when other sources are not available. Obviously the per-kwh cost of a power station that rarely ever runs is going to be much higher than one that is always running at full capacity.
I would suspect SaskPower would charge these batteries when they have a surplus from their base load + renewables. They would draw from the batteries when they are short and the cost of bringing power in from neighboring grids is high.
When the batteries start to run low they would power up a peeking station. For example, Aspen Power 370 MW station they are building near Lanigan is such a station. You would expect it most of the time to be off.
Here in BC, we have the same thing with Hydro electric. There are a couple of smaller older hydro electric stations in the province that will run a few hours a day during peek load. Most of the time there is no flow through them.