Engine Battery question
I'm not sure this is the best place to post this question, so forgive me if I'm in the wrong place.
My 1989 Ford B-700 (7.8l Diesel, Wayne body) has a battery compartment with 3 large batteries used to start the engine. My question is, is that really necessary? I grew up on a farm and we had a couple of pretty large tractors that only used one large battery. Given they had almost no electronics, but I couldn't help but wonder about it. If I could step it down to one battery I could use the space to store batteries to run my solar set up there, eventually. Does anyone have any recommendations on how to proceed?