MC3OZ
Active Member
Why split up an expensive resource between stalls, when it makes more sense to have one big high capacity (both in terms of discharge rate and buffering capacity) capable battery for the whole installation? That way you always maximize the utilization of the system. In fact, adding batteries to assist with reducing demand charges has been specifically mentioned by Elon/Tesla at some point for V3 installations (though I'm not sure if any existing ones have them yet)
It is a long shot, but I did put some thought into it...
Say be have a bank of Powerpacks - peak power output = P1
if we have N cars charging at anytime the average power each cars gets is P1/N.
So the question is if we size the Powerpacks for peak energy storage or peak charging..?.
If we have an auxiliary battery in each stall which can output P2..... (assuming it is fully charged, or charged enough)
The peak rate of charging may be P1/N + P2, or perhaps just P2 where P2 is > P1/N.
We know Maxwell cells can absorb power and discharge power at a higher rate than a normal battery....
In reality it is most unlikely to be true, the investor day may simply have been moved to promote solar..
Last edited: