Does its job with aplomb.
For PWM85 Solar Charge Controller
Bought two of these a while ago as a key part of a solar powered wood-drying kiln project (never buy one of any hardware, am I right?).
It forms part of a circuit where another uController decides when to cut off the load when the 12v car battery is getting too low to survive the next fan cycle.
Essentially, if light levels are OK, and temperature is above a threshold, turn on 3 fans for x seconds. Stop y seconds, reassess readings. When temp is above 2nd or 3rd thresholds turn on fans for x+x seconds - and so on till its dark. No fans turn on if battery is dangerously low (set to 12.5v atm).
The surrounding air got to 75 C at one point two weeks ago, no bother.
This has been in situ and working for about two months, impeccable. My particular use-case actually needs to keep polling the battery to asses what to do next, so that'd be a nice addition, plus as I say the essential task of deciding if battery is too low. Cutting the load when battery is too low is not something I would want, the uController still needs to sip juice all night and check for light levels to re-emerge, see.
This unit manages the replenishment of a 12v battery from a solar panel and was easy to integrate into my final hack-ish solution. Plenty of burps and farts on the way, but never from this unit.
