Author Topic: 6 12 volt batteries connected in series/parallel to make 48 volts.  (Read 72 times)

sirmoiu

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Hi,
    my battery bank is 48 volts, 4, 12 volts batteries connected in series, i  want to add 2 more to increase my amp/hr
    i would like to know if it is possible to connect the 6 batteries in series/parallel to make 48 volts. My system consists of 10, 150 watts  panels connected in series /parallel, 2- 2kw  inverters, 4, 200 amp/hr, 12 volts batteries. the other 2 batteries are 12 volts 200 amp/hr and the midnite solar controller 150.
 Thanks.
« Last Edit: July 10, 2019, 04:21:15 PM by sirmoiu »

bee88man

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Re: 6 12 volt batteries connected in series/parallel to make 48 volts.
« Reply #1 on: July 10, 2019, 06:36:39 AM »
If it took 4 batteries the first time to even get the 48 volts, then that's what it will take to do it over again...

Doug

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Re: 6 12 volt batteries connected in series/parallel to make 48 volts.
« Reply #2 on: July 10, 2019, 09:54:28 AM »
Hi,

If you have parallel strings of batteries each string must be the same voltage. So, 8 batteries minimum for series parallel.
Also, it is not good to mix old and new batteries.

Doug

boB

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Re: 6 12 volt batteries connected in series/parallel to make 48 volts.
« Reply #3 on: July 10, 2019, 01:21:25 PM »

Yeah, You won't want to add Amp-Hours to only 2 out of the 4 series 12V batteries.

They will become out of balance quickly and ruined.

Use 8 like Doug mentioned and you should be good.
K7IQ

sirmoiu

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Re: 6 12 volt batteries connected in series/parallel to make 48 volts.
« Reply #4 on: July 10, 2019, 04:23:10 PM »
ok thanks guys for the help.