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Solar panels aren’t required at all.
by mikeash 7y ago
Solar panels aren’t required at all.
- amluto 7y agoNot only are they not required, they aren’t present at any station I’ve seen. Some supercharger stations do have an interesting thing: a big battery bank with a four-quadrant utility meter. I assume Tesla has come up with some clever billing arrangement that combines peak shaving, demand response, TOU arbitrage, and selling reactive power to minimize the cost of operating the station. Otherwise it makes little sense to me to collocate battery banks with superchargers. The part I don’t understand is that Tesla’s stations seem to operate at 480V input. Utility rates are a bit lower if you buy power at “primary” voltage. Maybe Tesla doesn’t want to deal with the fact that primary voltage is different in different places?
- mikeash 7y agoYeah, I’ve visited a couple dozen Supercharger locations and never seen solar either. I think the main purpose of the batteries is just to cut down on demand charges. Even a smallish older Supercharger can pull 500kW if a bunch of cars arrive at once, and that gets pricey. I wouldn’t be surprised if they got fancier as you describe, though. If the capability is there, might as well use it.