OK, another month has gone by since I last looked at correlation between Sense AC detections and Ecobee cooling runtimes. And guess what ? I now have one additional Sense device to look at, AC4, that made its appearance in July in my export data, but wasn’t visible until Sep. via Sense.
Let’s start with the downstairs system, where Ecobee runtime is a variable called “CoolDown”
Starting in Sep’17, the Sense ACDown device is well-correlated with CoolDown (the first column of graphs is really the only one that matters), running at about 4.5kW. AC3 and AC4 devices won’t appear for a number of months so they show up as zeroed out lines.
Moving to Oct., ACDown continues to be correlated with CoolDown, but the number of AC runs have fallen off sharply. The number of AC days drops to near zero after Oct. and there won’t be enough points to chart again until May’18.
By May, AC3 has appeared and seems to be the main device associated with CoolDown. The AC3/CoolDown relationship seems to get further cemented in Jun-Jul’18, though AC4 starts to make its presence known in Jul.
Surprisingly, in Aug and Sep’18, correlation vs. AC3 and AC4, yields to a renewed association with ACDown, plus a new attachment to ACSpike. ACDown now appears to be a 3kW device with ACSpike coming in around 200-300W.
