Moretorque
New Member
Just wondering, you can wire them into 48 and they are much easier to ship but harder to setup........ Thanks...
Then, yes, in that scenario, I wouldn't argue with that strategy. You would have other issues you will need to plan for and monitor (balancing), but I wouldn't call them a deal breaker. Particularly if the manufacturer is ok with using the batteries in series (as most that I've seen are). And in that scenario, I would probably rotate in the spare as a matter of routine - say ever 6 months.The point was made to me if you have a problem with a 12 you can send it UPS where a 48 100 pounder you cannot so in that regard it is better they were claiming. You have a 12 laying around for standby and it one goes bad in your 48 4 12's wired up you can replace that section and easily ship the other out for warranty? Thanks for replying....
I know that, I steal all my ideas from other people. I should become a patent attorney I guess....I always do it that way.
The one aspect that you do need to be careful of is that not all 12 volt batteries are rated to be wired in 24 or 48 volt, especially the cheap ones.
Connecting 12v batteries in series, each with its own BMS, to create a higher voltage battery will eventually have balance issues. You can add battery ballancer hardware to help solve the issues, but its good engineering practice to have a 16 cell 48 volt battery with a single BMS .you can wire them into 48
I know that, I steal all my ideas from other people. I should become a patent attorney I guess....
Just wondering, you can wire them into 48 and they are much easier to ship but harder to setup........ Thanks...
I agree with your answer as I have witnessed it with a friends system who has 4 batts in series each with a seperste BMS and at 48 volts… , he has balancing problems . Incant offer him much help as I have never had a 48v system...Connecting 12v batteries in series, each with its own BMS, to create a higher voltage battery will eventually have balance issues. You can add battery ballancer hardware to help solve the issues, but its good engineering practice to have a 16 cell 48 volt battery with a single BMS .
Battery Hookup has a battery that consist of 4 12volt all tied together and it looks interesting is all. The 12 volt batteries are under 80 pounds so they can be shipped UPS.FEDX, regular mail?I don't know why so many continue to encourage fellow DIYers to buy costly, premade 12v packs and then link them all together in some way that is or isn't recommended by the manufacturer. Sidestep most of the issues discussed above by purchasing your own bms for whatever voltage you decide, along with much less expensive bare cells.
I didn't want to spend any more money or make things more complicated than they need to be. A bad cell will often be bad during the return window. I don't feel warranties are worth much, because I don't assume the company who sold them will be around in 4 or 8 years time.
Does anybody here think 12 volt is the way to go for flexibility?
Thanks, that is why I need help. I will just spend the money and be done with it.I found attaching busbars and bolts and nuts to be neither time consuming nor much of a PITA, which is how many bare cells are combined. It was way easier than the mental energy needed to design a system.
Someone who finds these things difficult would not typically want to diy a solar system in the first place, eh?
Building with bare cells saved me thousands of dollars and took my solar project from just an idea to reality. I can't say your advice would have been all that helpful early on in the process.
Choose your batteries and electronics wisely...