Alternator charging light staying on. Renogy DCC50S

[fred_jb]

I think it is the inconsistency that is the issue here, if it worked as it should then we would all be happy but it doesn’t and that’s what Renogy should acknowledge.

Yes, I get the feeling that the firmware in these boxes is not very robust and is liable to get confused in situations not adequately anticipated by the software writers.

 

[fred_jb]

Just noticed a another weirdness with my setup, and wondered if anyone else has seen the same.

I was running the engine while parked tonight while monitoring the app. As expected after a short delay the Renogy DC-DC output rapidly ramped up to 50A. However it then repeatedly dropped down to zero before ramping up again. After a while I noticed a noise everytime this happened, which I think might have been the engine cooling fan briefly cutting in. I wonder if this momentarily put such a load on the system that the voltage dipped enough to make the DC-DC stop operations? I am surprised if it would be that sensitive as it is supposedly able to handle a wide range of input voltages. Last time I worked on this the weather was very cold so maybe the engine fan did not operate during the short time I was running the engine. I tried removing the relay and diodes I had in line with the battery supply to the DC-DC, but this made no difference to this unexpected behaviour.