The new WFCO's any good ?

BFL13 wrote:

otrfun wrote:
The new trailer we purchased earlier this year came with a WFCO 9875. This unit is the 75 amp standalone version, completely encased, and uses a standard 120v household plug.

Discovered very quickly it would never go into 14.4v bulk mode. Charge voltage would never go higher than 13.6v regardless how discharged the batteries were. Max charge current at 13.6v was approx. 20-25 amps. Replaced the WFCO 9875 with a PD 9260 (60 amps) we removed from our previous trailer. The PD9260 goes into 14.4 bulk mode automatically with very little drama---easily producing 55-58 amps of charge current if need be.

With the lower rated PD9260 we can get a good charge on our batteries in more or less half the time as the higher rated WFCO 9875.

To understand this, we need the size in AH of the battery bank the WFCO 75 amper was on, where it would not kick into 14.4 no matter how low the batteries were. And how low was that?

Reason to know is to see if it had any chance to get that 13.2v trigger, which for a 75 amper would need a very big battery bank at a low sort of SOC.

No large battery bank at the time. I tested the WFCO 9875 with the original batteries that came with our rig, two SRM-24 Interstate batteries. Not sure what the exact AH rating were on these batteries, but I would assume they were the same as most 24-series RV batteries.

I purposely discharged the two SRM-24's to approx. 12.0 volts one time and the WFCO 9875 remained at 13.6v with 20 - 25 amps of charge current. I had the same issue with a WFCO 8955 we had in our previous trailer.