How many BMS do I need for 10 DIY 12V 100Ah batteries?
- Thread starter peallen
- Start date
Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
You'd save a pile of cash with 200AH cells (5 packs) or better yet 280's (4 packs).
peallen
New Member
- Joined
- Apr 12, 2020
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- 70
cept i already bought 10, also i really like those fortune cells. 4600+700
What voltage will you be running the bank at? What are the plans for the batteries?
If 12V, and you pair them together, 10 BMS protects the cells the best.
If you link the cells in parallel, you should be able to cut that in half... if you link all 10 packs, so the cells are in parallel, a single BMS could do it, but you would sacrifice cell protection.
if you use a BMS that actually tells you the voltage of each cell in the series you could get away with 1 BMS but It probably would not be the most efficient. I would make at least 2 3p4s batteries and 1 4p4s battery which would require 3 BMS. The problem with having cells taht are too large is there is a lot of energy to move around if a cell needs balancing. Even a 2Amps of active charging will take days to balance if something goes wrong. The thing about a BMS that tells you each cells voltage is you can see if something is getting odd and investigate. A "dumb" BMS one that gives no data could get you having a bad cell without knowing.
A better option would be to build a 24V battery if you can use it in your system. that would cut whatever BMS are necessary in half.
A better option would be to build a 24V battery if you can use it in your system. that would cut whatever BMS are necessary in half.
Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
This person will have to decide IF they want 12V / 24V or 48V FIRST and then actually maybe formulate a PLAN as to what they "need" and then figure out what they "want" above and beyond need before any answers of value can be provided.
Other outstanding questions by this user.
diysolarforum.com
diysolarforum.com
Other outstanding questions by this user.
can you charge a 48v system with a 12v alternator? Other questions?
charging with this Blue Sea ACR ? Will this ultimately fry the alternator? Will I need to upgrade alternator? Possible dual alternator? Will I need a Balmer Voltage Regulator or Victron ? (if so which is better?) Anything else I should know? Goal is to charge 1000AH to 1200AH I'd like the best...
diysolarforum.com
1000 AH van build DIY Batteries, looking at 24V, What alternator do I need?
I think I can do a beginner build if I went with these all in ones but i'm not sure I want one now. So I'll need someone who knows what they are doing from this point. Least I got a bit of understanding on these systems. does anyone know descent installer in Portland Oregon?
diysolarforum.com
mapguy525
Solar Enthusiast
This person will have to decide IF they want 12V / 24V or 48V FIRST and then actually maybe formulate a PLAN as to what they "need" and then figure out what they "want" above and beyond need before any answers of value can be provided.
Other outstanding questions by this user.
can you charge a 48v system with a 12v alternator? Other questions?
charging with this Blue Sea ACR ? Will this ultimately fry the alternator? Will I need to upgrade alternator? Possible dual alternator? Will I need a Balmer Voltage Regulator or Victron ? (if so which is better?) Anything else I should know? Goal is to charge 1000AH to 1200AH I'd like the best...1000 AH van build DIY Batteries, looking at 24V, What alternator do I need?
I think I can do a beginner build if I went with these all in ones but i'm not sure I want one now. So I'll need someone who knows what they are doing from this point. Least I got a bit of understanding on these systems. does anyone know descent installer in Portland Oregon?
Agree, the other questions floating out there by the OP are detail issues of a system build. Many details need to be resolved regarding system requirements like operating voltage before resolving alternator charging issues.
I strongly suggest the OP visit the links put up in this post in regards to overall system design;
https://diysolarforum.com/threads/alternator-charging.6465/
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