What mide for clouded out days

Coyyote

Newby question. My AC coupled system has been running on mini grid and with my 315 aH batteries have not drawn from the grid. So now we have cloudy rainy weather and it will require at least a couple of bulk grid charges per day to continue to run via mini grid

My question is should I just carry on, or switch modes to something that prioritizes the grid and sane cycling my batteries?  If changing modes is advisable, which mode is recommended and is all that is needed is to change setting from minigrid to the new mode. Or are other setting changes necessary in Mate3s.

Thanks in advance for help!