Quote:
Originally Posted by ohmman
I don't know where you're getting these numbers. Do you care to share the source? Are you also assuming peak shavers would be lead acid? Is that where your lead numbers come from?
Tesla already uses battery banks at some Superchargers to peak shave. It's a cost effective solution, and it's not required as an alternative to the grid. It's supplemental. They're lithium-ion NMC packs, of course.
If the grid is firing up peaker plants to generate more energy to meet demand, that energy is, by nature, more expensive. It's also dirty. So using batteries made of mostly recyclable materials is quite arguably not "dumb."
Maybe I'm misreading what you're saying.
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I am the source. I work with high power electronics like this almost every day.
The lead acid specs are from Trojan battery and the inverters i talk about would be using existing inverter technology with industry standard voltages.
They would use lead acid because there is simply not enough lithium to make batteries to do all this. Sure tesla can build a few demo models. But scale it up to global size and build all the electric cars using lithium batteries. I don't think so.
For example when the Toyota prius sales first took off they were building so many NiMH batteries there was a global shortage and Ni prices shot up to record high of $30 per pound.
At least the lead acid batteries get recycled. The lithium batteries are chucked into a land fill when they're no good.
I have actual real world experience with inverters that handle 350kw loads. I work on 500hp electric motors that use pretty close to 350kw.
Where I work we have 9 of 500hp and bigger motors and we have our own 250kv line and our own substation, which cost around 10 million dollars just for the substation. The local farm and dairy cartel spent untold millions of dollars when they bought our 250kv line in 12 miles for us. A smaller sub station could be used for a car charging station but would still cost a few million dollars.
Each 350kw inverter charger should cost under $100,000.
The 500hp inverter drivevariable frequently drives cost around $70,000, a lot of the same stuff would go into both a VFD and battery charger. So we should assume cost would be close to the same.
Each inverter power source would be the size of very large refrigerator and require climate control.
That's why I find the cute little solar roof top charing station a joke. They are not showing the sub substation supplying power the inverters, they are not showing the inverter control room with hvac sitting on top or next to it.
It looks like false or misleading advertising at best.