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
Landyacht's post persuaded to get out there and try to measure the actual current.
My system has two built in ammeters but they're low resolution. The Rogue charger has a 0.1A display, and the 100A ammeter with a shunt off the neg battery post has 0.01 display at low currents, but I don't think it can resolve better than 50-100 mA. My clampon is bit better than those, with a 1 mA display at low currents, but tends to wander a lot in that range. Prolly 50ma is its max resolution.
Anyway, my two built in meters were reading stable currents before I plugged in the fuse for the Meanwell RSP-500-27. I plugged it in and removed it several times. It sparked each time I plugged it in. The built in ammeters showed no consistent change, but the clampon showed roughly 100mA change plus/minus 50mA each time. At 26.66V that works out to ~64Wh per day. Reasonably close to what the Rogue daily log was telling me when I had the Meanwell fuses in.
FWIW
My system has two built in ammeters but they're low resolution. The Rogue charger has a 0.1A display, and the 100A ammeter with a shunt off the neg battery post has 0.01 display at low currents, but I don't think it can resolve better than 50-100 mA. My clampon is bit better than those, with a 1 mA display at low currents, but tends to wander a lot in that range. Prolly 50ma is its max resolution.
Anyway, my two built in meters were reading stable currents before I plugged in the fuse for the Meanwell RSP-500-27. I plugged it in and removed it several times. It sparked each time I plugged it in. The built in ammeters showed no consistent change, but the clampon showed roughly 100mA change plus/minus 50mA each time. At 26.66V that works out to ~64Wh per day. Reasonably close to what the Rogue daily log was telling me when I had the Meanwell fuses in.
FWIW
