Quote:
Originally Posted by rickst29
You don't need that battery isolator relay at all, you DO need a DC->DC charger.
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So, you need a device ("DC->DC battery charger" to pull low voltage (from the engine compartment), only while the engine is actually running, and "boost it up" higher near the LFP batteries when those batteries aren't full. The basic Renogy 20A DC->DC battery charger https://www.renogy.com/12v-20a-dc-to...ttery-charger/is cheap and usually adequate, the best one (Victron Orion "Smart" 30A) https://battlebornbatteries.com/prod...dc-dc-charger/ costs more than 2x as much, but I recommend the Orion.
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I'm toying with the idea of putting in a DC to DC charger like the non isolated Orion one that Rick suggested. But is there any possible way to put this charger on the TM side using the existing 12 volt input from the 7 pin connector as the input in to the charger? That seems tricky due to the need to supply 12 volts to the break away line. Has anyone succeeded in putting their DC to DC charger on the TM side rather than the tow vehicle?
Thanks in advance..