More then one charger on single bank?

[AZJoe]

I'm setting up a new bank of 6 new 6v golf cart batteries and I was wondering if I can use 2 deep cycle 7 stage 20amp chargers on the same bank at the same time. Problem is that a single charger is only rated to charge up 500 amps of batteries and I'm going to be at 705 (235ah each at 6v). Everything I have is set up for 12v and I do not want to move to a higher voltage system.
As a second question, I am going to have them mounted inside a Popup trailer. How much ventilation to the outside do I need?

[NEOH]

1) Multiple charge controllers - why not?

2) cm^2 vent ( top & bottom ) minimum = 0.006 x #Cells x ChargeAmps

4 cm^2 (approx) minimum = 0.006 x 18 cells x 40 amps


3 parallel strings of 2 batteries in series requires special connection.

[AZJoe]

No, two plug in 7 stage VMAXTANKS 20amp chargers. I'm running a Midnite Solar Classic 150 with plenty of room

[AZJoe]

HerEskue the battery bank.

[AZJoe]

So after pairing up each set of batteries and charging them up together, I wired them all together in series parallel at 12v. I connected one charger on either end of the outside sets and turned the chargers on (both VMAXTANKS 7 stage 20 amp smart chargers) and theyour slowly started to get in sync with each other (both on same stage and then the lights flashing at the exact same time). The entire bank from one end to the other is reading 14.02 volts. I'm going to see if they both go into float at the same time.

[AZJoe]

Finally decided to contact VMAXTANKS and they confirmed that both chargers can be used at the same time on the same bank of batteries as long as they were run thru a busbar. Both chargers run cooler then the single charger I had running the 6 12 volt SLA bank.