svetz
Works in theory! Practice? That's something else
I had been hoping Craig would bring this thread across as I'm in the same boat. Hopefully one of you all know...
For charging, both banks would be controlled by thier own BMS, so there shouldn't be any stranded power as you might have with an unbalanced cell in series, right?
Despite one bank working harder, both banks would still always be the same voltage. So it doesn't seem like there would be any extra wear and tear in terms of one bank backfeeding the other?
So, what do you think?
Bonus Question:
Do the BMSes have to be exactly matched for parallel operation or are all BMSes the same? If they're not all the same, how do you get matched ones?
As Craig said, adding a new parallel bank the following year means the two banks will have different internal resistances. Which means the new bank will supply more power and get more wear. But the old bank isn't working as hard, so it shouldn't be aging as fast. Similarly, the new bank isn't handling all of the power the first bank did the first year, so it won't age as fast as the first bank did. So, no net problem?So I have always figured that I could incrementally add storage to my system.
What I'm reading is that you shouldn't parallel batteries that do not have same IR and capacity. Seems to me that say 2 years down the road the original pack would be somewhat worn out and have say only 75% capacity.
So question is: how can I add new batteries later without prematurely aging the new ones? What is the procedure?
For charging, both banks would be controlled by thier own BMS, so there shouldn't be any stranded power as you might have with an unbalanced cell in series, right?
Despite one bank working harder, both banks would still always be the same voltage. So it doesn't seem like there would be any extra wear and tear in terms of one bank backfeeding the other?
So, what do you think?
Bonus Question:
Do the BMSes have to be exactly matched for parallel operation or are all BMSes the same? If they're not all the same, how do you get matched ones?