Indeed if you look at @samwooly1’s Device Library postings of the Keurig K425 standby heater the math doesn’t exactly match. So doing some rough math:
I get about 230W for 400 seconds/hr = 25Whr for your signature breakout.
Quoting the K425 standby above of 245W “for 4s every minute” ==> 245W for 240s/hr or 16Whr your device is a little over 1.5 times that energy.
In “keeping things hot terms” it seems quite close. A moderate variation in water volume?
So thinking:
- Double-check the off-ness of the Keurig (what model is it?)
- Sniff around for 3-cup warmers? Bed warmers? Cold out?
- “230W” = potential attic fan load. The regular timing could also be a hint of a timed fan. There are some indications in the signature of a slight motor-induced spike at the start of some of the cycles at least.
You may want to get methodical and narrow things down. Try here: