24v 2P8S 360Ah
- Thread starter MezzBatt
- Start date
200amp
Agreed. That's what I did. Two 4s batteries, each with a 120 amp Overkill Solar BMS.
if you put the 2 sets of 12V 120 amp BMS in series to get 24V with this solution you are limited to 120 A ?
I still don't know if the only solution for 300+ amps is a small BMS that drive a contactor/relay, I was hoping to find a relay that has an initial load to be activated and then some mechanical advantage (spring or something) that keep the contact close but not a stupid magnet field that has to be always energized killing my battery 
I think that's correct. Like any series connection, volts are additive, amps remain the same.
This makes a lot of sense to me as an electrician I've seen what breaking high current ccts does to contact faces. Also it allows all cells to be monitored via BMS. Problem is I'm in the UK and doubt he is shipping this way..???
i was thinking you want to go 24 V , so you have to go in series with the 2 sets and that solution is not good for you
This will never work, the 'device' rating is still only 12v/120amp. You cannot double up 12v loads/devices/resistances to work in 24v mode it's only DC power sources (Batteries) that you can 'series' up..... Ohms law anyone....????
correct, that why I said "that solution is not good for you" because you can not do it :D , my point from the beginning was using overkill BMS is out of the question if you need 200A and 24V . Sure you can go with 2 overkill in parallel and have 200A at 12V but i think was not the first post was asking.
I had a similar problem, and after chasing a 250+BMS at the end I decide to go with electrodacus , I will let it do all the BMS and solar handling, plus I will have a more complete monitoring system, temperature sensor, diversion of extra solar production, will be way cheaper and reliable with more longevity then MPPT system, and also physically less space, I am still on the design phase but if you want to take a look at the design so far and give your opinion you are welcome.
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