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System is 12v, 4 Panel 100W, 18v-21.6v, 5.5A-6.11A. 2 Series, 2 Parallel. Apparently rule of thumb is to size it to be 2/3 max output. 400W / 14.4 Volts = 27.8A. If it's sized at 2/3, that would require a 41A output. I think 40 would be close enough. However, Victron's calculator says to use...

This is somewhat of a continuation of https://diysolarforum.com/threads/emergency-starting.9618/#post-104557 Understanding that the Solenoid automatically connects the house battery to the alternator upon startup, it would seem that in order to facilitate charging the house battery with the...

I posted this in the DIY LiFePO4 Forum, but thought it might be better here. This is somewhat of a continuation of https://diysolarforum.com/threads/emergency-starting.9618/#post-104557 Understanding that the Solenoid automatically connects the house battery to the alternator upon startup, it...

Hello, DIY Sleuths and Experts! I have a 2021 Jayco Alante that has Solar Ready Wiring from the roof to the battery bay. There is nothing in the literature that came with my RV that explains this wiring. There was a junction box mounted to the inside of the bay marked "SOLAR PREP" that has six...

I'm building an 8 cell (3.2v 100ah) 12v pack as a "drop-in" replacement for my current lead acid setup. My intention is to make 2 sets of 4, then run them in parallel. Based on mobile-solarpower.com, i'm looking at this BMS: https://overkillsolar.com/product/bms-120a-4s-lifepo4/ It's designed...