I'm planning a new electrical system for my camper. We don't often camp at sites with hookups, but neither are we typically boondocking in the middle of nowhere. My foundation is a good 100ah sealed battery. It'll power some led lighting, a few USB ports for charging goodies, a modest stereo, and maybe a couple of small fans. I don't think I'm going to both with an inverter. I'll have some outlets and a charger/converter system for when I do have a hook-up at the site (and a 100w solar setup for when I don't), but otherwise I'm not going crazy... which brings me to my question. The industry standard for RV's seems to be a $200+ all-in-one converter/charger, but for what I need this seems excessive. Could I not accomplish the same thing with a decent battery charger and a 12v power supply? Would these two things work? https://www.amazon.com/dp/B07HVRQFX...olid=3K3IRWBYR0N32&psc=1&ref_=lv_ov_lig_dp_it https://www.amazon.com/dp/B00CBTRN2...olid=3K3IRWBYR0N32&psc=1&ref_=lv_ov_lig_dp_it Holes in my thinking? Better/cheaper suggestions?