More fun with Renogy MPPT and LFP
Toying with a new to me 12V compressor car fridge. Cheap Chinese box, LG compressor, 50L volume split ~28L fridge, 22L freezer. The goal was to see whether my added insulation made any difference: Ref...
Forum Discussion
pianotuna wrote:
The load terminals on my Blue Sky are used as a "sun sensor" switch. Perhaps yours are too?
Load terminals are in "Manual" mode, switched On and Off manually. It was On. Other modes are Automatic aka sun sensor - switching On when sun comes up, and Automatic+Timer.
Load terminals didn't disconnect, fridge was cycling until the battery dropped to 11V - it was supposed to do LVD 12.6V AND give low-voltage warning at 12.7V. The app says "Alarm", the manual - "Warning", so could've been just a blinking light, no alarm. Lost in translation from Mandarin.
I think the fridge disconnected at 11V, not the Load terminals. Other users complained that this fridge does LVD at 11 no matter whether you set it to 9 or 12.
Battery BMS has 10V LVD, so it didn't come to this.
StirCrazy - yes, I got the Bluetooth dongle and app. Paid CAD 20 or so on Aliexpress, Renogy wanted CAD 49. Without dongle you can only switch between pre-program settings for AGM, FLA, Li and User-defined. All modes have Discharge Limit 10.6V and LVD 11V. Maybe somebody could explain what Discharge Limit is and how it can discharge to 10.6 after Load was disconnected at 11.
In User mode you can change these values. In the app there is no LVD (!) but there is Discharge Limit and Over Discharge - the latter must be LVD. It is possible that I set LVD below 12 - called misleadingly "Over Discharge" in the app, and what happened to mysterious Discharge Limit set to 12.6 I don't know, since LVD aka Over Discharge had kicked in at 11. They could've used same terminology in the Manual and the app. After I'm done with the fridge, I'll experiment more with Discharge Limit and Over Discharge.
