I am planning on adding a few 12 Volt accessories (like a small fridge) to my car and wanted to mount a Victron 75/15 MPPT directly to the starter battery as I do not have an auxiliary battery and do not plan on getting one. My intention with this is to allow my 90 AH starter battery to power a few 12 volt electronics when the engine is not working. Is it safe to set up the MPPT with the starter battery? Will my starter battery charge through the alternator (when the engine is running) like it normally would?