higher amps from higher voltage. WFCO not designed to use higher voltage for normal charging.
http://wfcoelectronics.com/oem-bulletin-archives/
april 16 issue
"For those cases when the battery charge drops significantly due to prolonged disuse, poor maintenance, or significantly heavy system overloads, our 14.4 Volt Fast Charge (Bulk) Mode kicks in. Our Fast Charge delivers a maximum four-hour charge "
From their Their theroy of operation. "preset level"
http://wfcoelectronics.com/wp-content/uploads/2016/03/WFCO-Theory-of-Operation-v2.pdf
"When the microprocessor detects the preset voltage level, it will boost the converter voltage to 14.4 VDC. The increased voltage will help the battery charge faster, while still providing power to the DC appliances in the RV.
In Bulk Mode, it may not be possible to observe the 14.4 VDC output because of the voltage-current relationship. To measure the 14.4 VDC, reduce some DC loads while monitoring the voltage at the converter output. As the DC loads are removed, the voltage will begin to climb until 14.4 VDC (nominal) is shown on the meter.
As the battery continues to charge, the current drawn by the battery will gradually decrease. WFCO Converters are designed to drop out of Bulk Mode when the total amperage-draw from the converter reaches a preset point, indicating the battery is charged. If the amperage-draw stays above the preset point, the converter will stay in Bulk Mode for a maximum of four hours."
1. Wfco not designed to go into bulk for normal charging, only for abused and heavily discharged batts.
2. if it does go into bulk it does not stay there.
3. Wfco is clear their product is sub par as battery charger if getting to FULL and/or fast charging is a goal.
