ABE WALTERS GETS CHOKED UP the more he talks about it. Standing in his backyard, Walters described the tedious, eight-month process for securing a $100,000 loan from the Massachusetts Community Climate Bank to add solar panels and battery storage to his Bellingham home, which now includes two electric vehicles and a newly installed heat pump. The ordeal was like a full-time job, said Walters, who works as a peer liaison with patients suffering f…