Meanwell PS creates a load?
Recently realized that my solar systems daily output had increased by ~50Wh per day when in storage with no shorepower. It was hard to believe that the parasitic loads or the battery self-discharge...
Forum Discussion
I just got around to clampmetering my Meanwell rsp-500-15 with it plugged into DC, No AC.
I have two Noctua fans attached to DC outputs, so IF I have it hooked to DC, the fans spin. I use 45 amp anderson powerpoles toconnect/ disconnect. I also have a GTpower wattmeter inline, and another brighter easier to read voltmeter which also illuminate when hooked to DC.
As far as I can tell, these are the only loads when I am plugged into DC with no AC.
The 60mm Noctua nf-a6x25-flx is listed at 0.12 amp draw
The 80mm NOctua Noctua NF-R8 is listed at 0.12 amp draw
My clampmeter over the wires to these two fans is reading 0.24 amps
The wattmeter draws 0.05 amps, not sure of the green voltmeter as its wire cannot be easily clamped, but I will assume it is somewhere between 0.04 and 0.001 amps
Total draw according my my clampmeter is 0.33 amps. I know these clampmeters are generally not really accurate down this low, but I have done side by side testing before with other ammeters hooked inline on the circuit and found it fairly close at a single t10 LED at 0.08 amps draw.
So as far as I can tell, the only loads when I plug in my meanwell rsp-500-15 to ~12vdcDC are my additional fans, wattmeter and voltmeter.
I have two Noctua fans attached to DC outputs, so IF I have it hooked to DC, the fans spin. I use 45 amp anderson powerpoles toconnect/ disconnect. I also have a GTpower wattmeter inline, and another brighter easier to read voltmeter which also illuminate when hooked to DC.
As far as I can tell, these are the only loads when I am plugged into DC with no AC.
The 60mm Noctua nf-a6x25-flx is listed at 0.12 amp draw
The 80mm NOctua Noctua NF-R8 is listed at 0.12 amp draw
My clampmeter over the wires to these two fans is reading 0.24 amps
The wattmeter draws 0.05 amps, not sure of the green voltmeter as its wire cannot be easily clamped, but I will assume it is somewhere between 0.04 and 0.001 amps
Total draw according my my clampmeter is 0.33 amps. I know these clampmeters are generally not really accurate down this low, but I have done side by side testing before with other ammeters hooked inline on the circuit and found it fairly close at a single t10 LED at 0.08 amps draw.
So as far as I can tell, the only loads when I plug in my meanwell rsp-500-15 to ~12vdcDC are my additional fans, wattmeter and voltmeter.
