Hymotion Plugin modification for gen 2 Prius testing

Was able to get some mpg stats in the last couple days.
Afternoon run yesterday for 10km, mostly in EV mode 3.3l/100km(71mpg) I think it took 1.8Kwatt to recharge
Today mostly EV run 75% highway at 90KM/h (55mph) 3.9l/100km(60mpg) for first 50km(31miles)
total run today blended result 4.4l/100km(53.5mpg) for 121km(75 miles) run
My regular commute is 4km each way, so I hope to get great mpg, when its warmer, today we had frost on the windows.

Not sure how far off the new pack this is, but initially I am impressed.
I will need to log more miles to get a better picture.

 

the hymotion sure helps with fuel economy.
But I am getting worried about it and have removed the orange High voltage plug.
When I turn the car on and when I turn it off, I get a load noise from inside the box.
I suspected intially it was a relay.
It has been louder and yesterday, it clicked and kindof made a hissing noise.
Guess I will need to remove it and open it up to see if maybe the relay contacts are shot and I am getting arking or something.
It seems to make a louder noise if the pack is fully charged too.
The fan has a bit of a noise too, so will probably replace the fan while I am in there too.
I hope its just a relay.