How to connect your batteries to make up a 24V or 48V system10 CommentsThursday, 4 August 2016 | Admin How to connect your batteries to make up a 24V or 48V system For larger systems with more than a couple of panels there are some advantages in running at a higher voltage:
Most batteries are rated at 2V, 6V or 12V so you will need to connect them in series in order to reach the voltage you require. Connecting batteries in series means connecting the (+) terminal of the first battery to the (-) terminal of the next battery. Each battery you connect in series increases the voltage of the battery bank. Here are a few examples: Two 12V batteries connected in series, the total voltage is 24V
Four 12V batteries connected in series, the total voltage is 48V
Four 6V batteries connected in series, the total voltage is 24V
What voltage should I run my system? The voltage of your panel must be higher than the voltage of your battery bank. This is because most charge controllers are only able to step down the voltage from the panels to match the battery, and they can’t step it up.
Advanced setup: connecting batteries in series and parallel Suppose you have four 12V batteries but you want to put together a 24V battery bank. You could connect a pair of batteries in series, and then another pair of batteries in parallel.
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Am have battery 12v two 6v two and 24v want to battery 48v
easiest 2 diagram iv seen to describe it but still im stuck when i need to add more batteries.
i have 21 x 12v 55Ah deep cycle batteries.
how would i configure them for a 24v using 6500AH or 48v system at 1625AH.
if u could solve these problems i have i will paypal you £20.
:)
Hi Percy,
Please can you email me your email address to info@newenergyco-op.co.uk and I hopefully be able to answer your question!
Best regards
Cliff
I have four 12v soler sels how much valtege battary i need
what will be th kva? and A/h of a 48v system if u built it with 24 2v 770a/h batteries
You would get a battery at 48Volts with 770AH but you would normally only run these at 50% depth of discharge if being discharged on a regular basis and if lead acid so this would be 335AH
You can discharge to a lower depth and the 2 volt cells are more resilient than 12 batteries. but this would shorted the life of the battery if done on a regular basis
The KVA figure would really depend on the inverter that you have driving the AC system as these are limited to the transformer size, however the 335AH is available whether you draw this in 5 minutes or 5 hours depending on the load.
Hi there.
I need an advice i have 6 12v 130AH batteries which is the best way to connect them to my 24v 2500w inverter? And what size of cable and fuse do i need.
Thanks
Uli
Hi Uli,
You would need to connect 2 in series and 2 in parallel – you will get a total storage of 260AH.
The Fuse would need to be 120A or possibly 130A depending on the load and the tolerance of the inverter.
Best regards
Hi there thanks with your advice the connections 2 in series and 2 in paralel make them 4 battery i have 6 in total so i just add them paralel and in series with the others?? And i have a 16mm rigid cable do you think is ok or its too small to connect the batteries and the inverter? And what size of fuse do i need to use between my 40A MPPT and the batteies?
Thanks again
Uli
How can I make connection of 24v from 9 v batteries