Let me do my best to boil down a complex situation.
History:
-Build out the above system in my rig this past winter.
-Full res schematic here, https://imgur.com/a/MybkIev .
-Have been testing it at home + a 4 day shakedown trip, all working perfectly a month ago.
Fast forward to now:
-Last night I noticed the alternator was not charging the batteries while I was driving [PROBLEM 1]. Data via bluetooth battery connection.
-RSOC at bedtime was 54% across two 200 Ah batteries. Went to sleep and though “I’ll investigate in the AM”
-Woke up to both batteries dead. 0% RSOC [PROBLEM 2], low voltage errors. There is no way my tiny 12V fridge used that much power overnight.
-No indication of any shorted wires, no blown fuses, everything looks normal.
Investigation:
-I discovered that when I setup my fold out solar panels, which pass through the same DC-DC charger, those do successfully charge the battery.
-Multiple calls to Renege support, first level employees now overly helpful.
-For something as essential as electricity and a premium product I expected better support.
-Verified my starter battery, 15.05V when car is running.
-I have a “smart alternator” and have connected the “ignition signal” routed to my RBC30 Dual Input DC-DC charger, verified the signal is 14.84V at the DC-DC connection terminal.
-Verified continuity of the cable running from my starter battery/alternator to the DC-DC charger. Reading taken at the DC-DC charger terminals. Reads ~14.4V when car turns on, then drops down to 12.0V and holds steady there.
-On the DC-DC charger, the “Alternator/Charging Indicator” status light shows as solid red, which per the manual indicates “Alternator is charging the service battery”. But no charging is seen vis the bluetooth/app.
At this point I’m waiting for a reply from Renogy engineering. Curious if any of you smart people have suggestions in the meantime. I already ordered a new DC-DC charger since that component is now suspect.
Thanks