Different question on wfco

You are telling me you put a solid continuous 73 amps into two GC2 batteries for a full hour and never exceeded 13.6 volts? Seems odd. And this is the Boondocker right?

I am thinking that 73 amps was the initial current and voltage quickly went to 14.6 and immediately dropped to 13.6 for the next reading.

Generally I cannot recommend the Boondocker for fast charging on generator as it has no timer to hold absorption voltage. Going higher in amps even makes it worse as the voltage will spike earlier in the charge cycle. You would have been better with 35 amps. PD or IOTA as said above is far better and about 60 amps is plenty with just two batteries.

Randy has lost his touch IMO :(

You will only have to replace the converter/charger unit. Most likely can keep the WFCO Power Distion Panel where all the circuit breakers and DC fuses are located. The PD series will fit in the same compartment where the WFCO converter is located. If it doesnt then you can mount the PD UNIT almost anywhere. All it needs to operate is a 120VC standard wall plug. Then of course have the three DC CABLES connected to proper termianl lugs on the 12VDC FUSE PANEL board.

When I finally decided to replace my WFCO COnverter I got the PD9260C unit and mounted it right before my BATTERY SWITCHES which is about five feet away from the battery bank. Then I used the existing DC cables coming the WFCO panel to tie into the PD9260C dual DC lugs. I used 4AWG cable to feed the battery switches I have installed for my battery bank of four each 12VDC 85AH batteries switched in parallel. I also left the WFCO COnverter unit in place as I didn't have the heart to throw away a almost brand new unit. It serves well as a back up converter/charger unit now. I can select which WFCO or PD converter to use by flipping the corresponding 120VAC circuit breaker.

Your batteries will love you for this mod big time...

When you search back on the WFCO products you will find almost all of the posts all say the same thing about the WFCO not charging your batteries properly...

I have never really figured out why the WFCO units don't work. It seems that almost every new RV units comes out with one of these converters installed.

Roy Ken

Thanks, I guess I need to do more checking. Does 10 % increase in 1 hour charging seem ok?

The Boondocker 75 amper would normally go to "boost" (doing 75 amps steady) for the first 15 minutes after you turn it on. That would bring batteries that started at 12.2 volts say to 13.6 or so on the initial "spike" you get when turning on a charger.

If the battery voltage did not reach 14.6 in that 15 minutes, the charger would continue to charge at 75 amps till the voltage did get to 14.6, at which time the charger will automatically drop to 13.6 volts and stay there till the batteries are charged up.

When that drop to 13.6v happens, you will see your 75 amps drop immediately to about half that and then start to taper.

If the batteries reach 14.6 in that first 15 minutes, then the voltage will drop to 13.6 and stay there while amps taper.

The Original Post was a little vague on exactly what happened. If you did not see the action as described above, call Randy again.

The WhiffCo makes a great static power supply. Are the PD9260, or DLS-55 made in China or with Chinese parts?

If Randy said that's normal I would go with his answer. He has never told me wrong. JMO

Idea 1. Get a PD 9260

Idea 2. Get an Iota DLS-55

Either will solve your problem. That problem being that a WFCO doesn't charge at 14.4 to 14.7V bulk charge mode, hardly ever. So you replace it with a unit that does, like the two items I mentioned.