Fitted a Victron Orion-Tr Smart 30A DC-DC charger to my Transit-based van build about six months ago and it's been brilliant for keeping the leisure bank topped up on the move.
@ROW_OffGrid 180Ah from a 200Ah at 4°C is honestly not too bad — you're probably losing another chunk to the BMV's state of charge calibration as well, so the real-world chemistry loss might be...
Been scratching my head over this one for a few weeks now. I've got a Victron SmartSolar MPPT 100/30 feeding a 200Ah lithium (a Fogstar Drift 12V) in my Transit-based van build.
WattTony | Posts: 1,203 | Location: Norfolk
Worth adding to what @StormyRigger and @Davo83 have touched on — the real headache with your specific combo is that 175W Victron sitting in parallel...
Good points all round. Worth adding that a simple DC-DC charger (like the Victron Orion-Tr Smart) between your LFP bank and the LA starter battery is probably your cleanest solution here.
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