@SeaDawg, I still have the Navion 24V. I chose the Multiplus over the Multiplus II. The Multiplus was a couple of hundred dollars less money. The Multiplus II is capable of handling Grid applications or functions. I saw no merit to the Grid capabilities. Victron sells either the MultiPlus or the MultiPlusII in various VA. The Victron solution has worked flawlessly for several years. I also employed the Victron and Battleborn system in my sailboat. Albeit, the sailbot was for racing and has a spartan interior, ie no Hot water, HVAC or Solar. I was concerned with powering running lights, autopilot and instruments. The battleborn afforded all the power I ever required as long as I monitored the battery temperature and kept it about 80 degrees F or less. I delivered sailboats to the Caribbean, Fllorida and two trips to England after I retired in 2000. The vast majority had a Victron system. As John Davies pointed out proper installation, temperatures and SOC, the Victron System is almost Bullet Proof.
Respectfully, George Bergh