How to Connect Batteries in Series with Power Inverter or UPS [Wiring Diagrams]



Connecting batteries in series is required if power inverter, solar hybrid inverter or UPS requires a multiply of battery voltage to work. For example, an inverter designed for 24V batteries require you to connect two 12V similar capacity batteries in series (2x12V = 24V). You may also connect lower voltage Maintenance free, VRLA, Flooded lead acid or Lithium batteries for example with 24V inverter you can connect twelve 2V similar capacity batteries in series (12x2V = 24V) or four 6V similar capacity batteries in series with it (4x6V=24V). Commercially connecting smaller batteries in series is also economical as then you can just replace single faulty battery in pack without changing the whole battery pack which would cost you much more money on maintenance.

Before connecting batteries with inverter or UPS, check its specifications to make sure what battery voltage and battery type it can accept. Never connect more batteries in series than acceptable voltage. For example, connecting three 12V batteries in series with 24V inverter will damage it. Similarly you can not connect single 12V battery to a 24V inverter. It won’t work.

We have published diagrams for connecting two, four, six, eight, ten or twelve batteries in series with inverter, solar inverter or UPS. Make sure to connect correct batteries with your power backup devices.



Connect 2 Batteries in Series with Power Inverter or UPS


 
 

Connect 4 Batteries in Series with Power Inverter or UPS


 
 

Connect 6 Batteries in Series with Power Inverter or UPS


 
 

Connect 8 Batteries in Series with Power Inverter or UPS


 
 

Connect 10 Batteries in Series with Power Inverter or UPS


 
 

Connect 12 Batteries in Series with Power Inverter or UPS


 
 
Important:
– Do not connect different voltage batteries in series. Make a series pack of similar voltage batteries only.

– Do not connect different capacity batteries in series. Connecting different capacity batteries in series will result in incomplete charging and premature failure of batteries.

– Do not connect multiple batteries in series that will result in higher voltage than what inverter or UPS can accept.




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