Quote:
Originally Posted by oil pan 4
To buy enough battery capacity to charge let's say help charge 1 vehicle at 350kw would want a 700v system because this is a common inverter voltage. The bank would have to be made up of at least 97 12v batteries rated for 225 amp hours.
That many batteries could supply around 70kw of charging power. So you may want more like 2 or 3 of these banks per vehicle.
Each battery would weigh around 130lb, cost $400 each.
Each battery bank would cost around $40,000, contain around 10,000 pounds of lead and would need to be replaced around every 5 years. Just to charge 1 or 2 cars at 1 location. The battery houses would have to be climate controlled because that much charge and discharge would make a lot of heat.
So it's a bad idea and dumb idea.
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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.