Recently I had to go abroad for a few days, and given a new access path I just added to my HouseMon setup, it let me track things while away from home. Is that good? Eh, sort of…
The nice thing is that I can now check the solar production in the evening while away from home. And obviously I can then also check on the energy consumption – here’s what I saw:
Very odd. Something was turning on and off all the time! Here’s a close-up:
As you can see, I did figure it out in the end – but only after this had been going on for two days, on the phone with Liesbeth to try and identify the source of this behaviour.
It was a bit worrying – that’s a 300..400 watt power draw, every 45 seconds. Going on for days. This is enough energy to cause serious heat problems and my worry was that it was some sort of serious malfunction, with a thermal safety constantly kicking in.
Yikes. Especially when you’re away, knowing there is no one at home during the day…
The answer to this riddle isn’t 100% conclusive, because I did find a way to stop the pulsing, but turning power on again did not cause the pulsing to resume:
This is crazy. The only explanation I found, was the laser printer: I had printed a few pages before going away (and as far as I can remember, I did turn the printer off after use). The printer was behaving erratically, and I had to turn it on and off a few times.
So my conclusion is: the laser printer (which has a toner heater built-in that can indeed easily draw a few hundred watts) got stuck in some weird mode. And kept me worried for a few days – all just because of me being a geek and checking my graphs!
I don’t know what lesson to take home from all this: stop monitoring? stop checking? stop traveling? – or perhaps just stop worrying when there’s nothing you can do about it ;)