How to Charge Two 12V Batteries Wired in Series with NOCO Genius Mini # 329-GENM2

Updated 12/29/2025 | Published 11/04/2019

Question:

how to connect the noco gen mini 2 2 bank charger in 2 deep cycle batteries converted to 24 volts or connected in series so that the charger is always connected

asked by: Miguel

Expert Reply:

The NOCO Genius Mini On-Board Battery Charger # 329-GENM2 that you referenced is a great option for charging your two 12V batteries that are wired in series so that they have a 24V output. In order to hook up the charger so that you can leave everything connected you will simply connect the leads from each of the charger's two banks as if you were charging two separate batteries.

The red wire from bank 1 will go to the positive terminal of your first battery and the black wire will go to the negative terminal. You will do the same thing on the second battery with the second bank. I verified all of this with my contact at NOCO.

I have attached a short video review that you can check out as well.

expert reply by: Chris R