BFL13 wrote:
Some days you want a shorter Vabs time if the batts are bubbling too much, and other days you can't get enough with all the clouds. You have to pay attention every day what is going on with the batteries and how to play the solar settings.
...or you can get a controller that will do all this for you. Grape doesn't.
The situation when you can't get enough is best remedied by getting more solar (plus, a proper controller, there is no way around this) - controller would divert the excess energy to loads when they are bubbling too much.