Factory Solar Question
My factory 80W solar has never kept the battery charged when the camper sits for a couple of weeks. Not an issue now as I store it inside a hangar plugged in, but when I first got it and stored it in ...
Forum Discussion
pianotuna wrote:
The problem with the calculation is the 80 watts is at the rated voltage of the panel. Unless it is an MPPT controller you won't "see" all of that. A rough approximation would be that around 60 watts may go into the battery bank.
That works out to about 300 watt-hours per day, or approximately 25 amp-hours.
But that is based on perfect conditions and tracking. So a real life number may be only 16 or 17 amp-hours per day for a fixed flat install.
I was always told of big differences in MPPT and PWM. Things like MPPT converts volts to amps" etc.
Here is an interesting video testing a bunch of solar chargers back to back with MPPT vs PWM. In some cases like good sun the PWM actually did marginally better.
Will is a little goofy but his test here looks pretty well controlled.
https://www.youtube.com/watch?v=kF_cVEYxj3E&t=1093s
