Yeah I respect this approach a lot, it is a learning curve for me as well (even with all the planning I thought I knew how to do, some things still went sideways to a certain degree and I'm not even deployed fully yet). I decided to plan with using the 48v DC in my initial solar setup, but my RV already uses a 12v 6-battery setup (with a Magnum inverter, and a few tiny solar panels on the roof with a pmw charger), and also has an Onan 6.5 kW propane generator I wish could be good for charging the 48v or something. Then my Toyota Prius has a 207.2v DC hybrid lithium traction battery setup where I added in an APC rackmount 240v/120v 3.5kW / 5.2 kW surge UPS/inverter connected to it (for backup generator function), however, I have not found an easy way to interface all these system voltages together, other than use a 240v AC output on the Prius APC/UPS to potentially run a generator input on an a Sol-Ark all-in-one or something. Or one guy used a midnight classic MPPT solar charge controller to convert his Prius Hybrid battery 207.2v DC directly, to charge his solar 48v battery bank. For the most part my 48v system should be pretty scaleable by itself, but I wish I could tie some of these systems together to the RV and the Prius, so I could move DC power around in the most efficient way. Then there's all the EMP resistance planning as well (thanks to Steve_S for all that info as well), I plan as much as possible, but as I learn more things evolve and change in my plan. So far not too bad though. Will try to run as many things off raw 48v as possible, and if I get a Sol-Ark later, it will only be a luxury item really, to use AC sparingly, like for power tools, air compressors, and such where DC doesn't make sense. My particular off-grid location has no electricity for 45 miles, so have to build a solid system. If I add in more solar panels later, I would use the MPPT chargers in the Sol-Ark I'd plan to get, to scale out and add those in. For now though I wish I had a way to get more solar to the RV 12v system, might need to buy more panels, since it isn't easy to move power around.