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Comment Re:Not always feasible Re:Skip the battery (Score 1) 108

I'm going off the article summary:

> The batteries charge in the afternoon when solar power is cheap and release energy in the evenings when Californians get home and crank up their air conditioners.

I pickup from this text that people are waiting to turn on their AC until they get home, after the batteries stopped charging. That seems backwards.

Comment Re:Not always feasible Re:Skip the battery (Score 2) 108

It will take a couple hours to bring the temp down. Do that during the afternoon while the solar is working at its peak, then by the time the solar loses efficacy, the temp is down and can be kept down using a battery. There's no reason to wait until early evening to start, when the whole process would have to be off a battery.

I pre-cool my apartment to 65 until 10AM or so, when energy is cheap, then let it slowly rise until the evening. It's comfortable almost the entire day and saves me from peak pricing during the afternoon. In other words, this isn't a fantacy I cooked up, I've been doing this for years and it works well.

Comment Re:Not always feasible Re:Skip the battery (Score 2) 108

The article implies the AC is off during the day, when there's sun, and then people turn it on when they get home, after the sun has started setting. The article also implies these batteries are part of the public service. If they have surplus during the day to charge batteries, they should instead use at least part of that surplus to run AC systems to bring the temp down ahead of when people need it, and avoid the inefficiency of converting to chemical then back to electrical.

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