Sam Spade wrote:
The ON duration might need to be adjusted a little if, for instance, the charger is low capacity and the battery is LARGE.
p.s. I have no idea why you think it will make any significant difference at what time of day, or temperature, the run time is set for.
In the first instance, that's why I said 'an hour or two', you tweak it based on charger output and battery size.
As for the latter part, around here, on a cold night, the temperature drops to -40 deg. F.
Even a healthy battery is challenged at those temps.