Long charge time

rjxj wrote:
First I want to thank Roy, Mex, Piano and others for posting good electrical info on here.
I have now installed a PD4655 converter, 4 new 6 volts, 6 gauge wire from converter to batteries and battery wiring is balanced.

Over the weekend I ran the batteries down to 12.1 and put it on charge at about 6:00 pm. It went into boost mode and I was reading 14.2 at the converter. I was reading 13.3 at the battery bank. I checked the converter as directed by PD tech and it has the ability to put out 14.42. I placed a temporary 4 gauge cable straight from the battery to the converter and it reduced the voltage drop from .9 to .5
When I checked it at the converter last night at 11:00 pm it was 14.25. When I got up it was in normal mode with a fast flash and 13.6

Before starting the charge the SG was 1.230 and it is now almost 1.250 So I have moved the SG less than 1/2 way and its been 16 hours. I know it wont put the SG at 1.275 in 4 hours but something is wrong. The only thing I can think is that the charger needs to be VERY close to the batteries or I need 2 chargers?

It also has good shore power with full voltage. I plan on running a generator this winter so I need to get the fast charge time.
Thanks for any ideas.

How far is it from battery to converter? 6AWG isn't very fat for anything over two feet.

Your SG looks like the 6s have been sitting below full for a while. You can't get the SG up doing 50-90s. After a 50-90 the SG will still be low. It will take more time at 14.4 to get the SG up--use the manual boost to keep the voltage up till it gets done.

55amps on a 440 AH bank, to do a 50-90, will take about 5 hours. Then the 90-100 will take ? another 10? hours