You most likely have a bad module in the hv battery. The charger keeps trying to balance the modules after theyre fully charged. When one module wont reach full capacity where the others are the charger keeps trying. When a battery is unbalanced, the charger may run for days. Its not doing much currentwise nor is it harming the battery, it just continues to try to top off the module thats not fully charged. A scan tool will reveal the culprit. Id get it over to Harleyguy.