I have a completely 100% off-grid home, and I needed to replace old batteries and control boxes for my solar power. I also had an under-floor hot water heating system, that was pretty much shot. I talked with several larger companies, and they did not want to do the work, and some of them never even bothered calling back. I guess that I was just small potatoes to them. So, I went online and I found Northeast Iowa Mechanical. Dean, the owner of the company, is a very intelligent person, and what he didn't know, he was able to find out through tech support. They replaced all the old lead-acid batteries with new lithium-phosphate batteries, and all the control boxes with new ones. They replaced solar panels, too. Dean took one look at the floor heating system, and he said, "Yes, I can take care of that!", and he did! The company was beyond super-professional, and they did an excellent job for me! I would recommend them to everyone!