I bought new, 2 EG4 48 volt rack batts with separate BMS, 1 EG4 XP 6000 1 Victron 450/200, 20 400 watt panels, 1 Oupes 2400, and I have another 8000 watts worth of used Santans with some other new and used panels. What else should I get for SHTF safety for long term security? Thanks for the...