Stop trying to reinvent the wheel. You have no need for a B2B if you have solar and a matching charge controller. Of course, the gadget guys would disagree but that’s to be expected🙀
I (and many others) use a WYCO panel that has multi stage charging from alternator or shore plus fused circuits for AC and DC. This makes a B2B redundant. I've read that high end lithium systems benefit from a B2B. If you start with a B2B you'll have to add your own fused circuits. A B2B would allow for future mods & eliminate a solar charge controller if you add panels later. The value of solar (200 watts) for me is maintaining my batteries (230ah) when the van sits. I don't see a reason to doubt or question your plan. It is different than many & may have an insignificantly higher initial cost. Others say you don't need it, it costs too much, etc, but none said it wouldn't work. Start from there & see where it goes. I experimented as I built, learned a lot, and would do it differently next time; however, no regrets.No, I think I want one. It seems simple to me and wanted to know if I'm missing anything. But I honestly haven't gotten any real answers. Just that I'm reinventing the wheel and it's overcomplicated gadgetry. I'm certainly not agonizing.
And I wouldn't be surprised if they're just busting my chops.
Rob 👍I bought a panel earlier this summer, prices have dropped hugely this fall.
Had a plan, bought some pieces. Now with new products, reevaluating the whole thing.
Point is Your dime, Your ride and Your time. Make it whatever you want to satisfy your self. Be Proud Man!