Strange Power Drain from Starter Battery – Victron Cyrix-CT & MPPT Solar Setup
Hi everyone,
I’m hoping someone can help me troubleshoot an issue with my campervan’s charging setup.
I have a Victron Energy Cyrix-CT 12/24V 120A Intelligent Battery Combiner that manages charging between my starter battery and leisure battery. It’s been working flawlessly for the past couple of years. When driving, my alternator charges the starter battery first, then the Cyrix-CT directs charge to the leisure battery once the starter is full.
I also have a 100W solar panel connected to a BlueSolar MPPT 75|10 charge controller, which charges the leisure battery. When the leisure battery is full, excess charge is directed to the starter battery.
Recently, I noticed something odd: While running my fridge off the leisure battery, a step-pattern power draw appeared on my starter battery (circled in red, each blip is the fridge compressor running, when you unplug the fridge it stop) it appears the starter battery is supplying power instead. Does the same with the inverter turned on that’s also connected to the leisure battery nothing else has changed in my system, so I’m puzzled as to why this is happening and have not seen it in the past.
Has anyone experienced something similar or have ideas on what might be causing this? Or has it just given up the ghost?
Thanks in advance for any help!