Well now it just might be that the WFCO is thermalling out and shuts down the charge, cools off and starts charging again....
PROBLEM: Converter keeps shutting down.
SOLUTION: Ensure proper ventilation and check for obstructions regarding the cooling fan. WFCO converters are over temperature protected and will shut down.
FACT: Voltage will be present on both sides of the DC fuse terminals due to the LED circuit.
https://wfcoelectronics.com/common-power-products-misconceptions-issues/I have had my 9260 PD... for over 10 years and it has had lots of use... I installed it into my Magnetic converter cabinet years ago. I only ran two FWC batteries and switched to 1 100ah Lifeline AGM a long time ago.
Jim
