Charging 24 volt system with 12 volt charger

Properly connect one to each battery, matching the charger's polarity to that of the battery posts. THEN turn on the chargers.

T_Bone

My point was not to connect the actual chargers in series to get 24-Volts (in other words, not connecting the middle (+) and (-) charger leads together, without attaching the midpoint to the midpoint of the series-connected batteries.

If you read my other post I DO use two float chargers at the same time on a 24-Volt Deere 4020, but DO have the chargers connected to the midpoint of the series-connected batteries.

I don't think leaving the midpoint of the electronic chargers "float" would work very very well, and also someone might try to use two chargers of different capacity.

Your right as my mind was thinking the transformer based chargers and elimanated any consideration on the eletronic regulation using the newer charging alogrythms.

I would hate to see someone ruin a charger from of my series circuit suggestion. I have used one newer trickle chargers using a modified PWM regulator in my circuits without problems but there again it could have been just dumb luck as I didn't look into of how the regulator works.

T_Bone

Just use two 12v chargers in series. negitive charger#1 to negitive battery#1, positive charger#1 to negitive charger#2, positive charger#2 to positive battery#2 equals 24vdc charge.

I use this same circuit to charge my 36v golf cart with 3, 12v chargers, two unregulated and one regulated, but the regulator won't work in a series circuit. Takes about 10hrs to recharge my 6v battery's from dead to fully charged. That's using a 6a, 10a and 20a chargers. I put the 6a charger in the center conection but it really wouldn't matter where in the circuit it's located.

T_Bone

On any dual battery system its best if both are the same size n type n model n age n condition and state of charge n specific gravity etc etc cuz if one is weak it can suck down the good one.

John T

John T

HOWEVER, when working with this or ANY battery setup, wear the appropriate safety goggles!

Simply charge one 12-Volt battery at a time with the 12-Volt charger, or you can use two 12-Volt chargers at a time, one connected to each battery.

At each battery, put the charger's RED clip on the battery's (+) terminal and the BLACK clip on the (-) terminal, following the markings on the battery case.

I have done this with semi trucks, Deere 730's and an 830, and with a 24-Volt 4020 I still own.

Absolutely no problems.

To be extra safe, set the battery charger(s) on the ground, or an a table or stand away from the frame of the machine. (SOME older battery chargers had the (-) lead internally connected to the metal case of the charger, and the case of the charger COULD spark to the frame of the machine when connected to one of the batteries.)