low power garmin rally rs200

What was measuring the power prior to using the RS200.

Favero assioma duo

"the right/left balance is 61/49% LR." it is typo i assume. 

can you give a (public) strava link to these 2 activities? 

Guarda la mia attività su Strava: https://strava.app.link/ZD6EmMonlyb

Guarda la mia attività su Strava: https://strava.app.link/D6C6MKenlyb

here are the two strava activities.

The 61 left / 39right balance refers to the garmin rally, with the axiom faveros always 52 left / 48 right.

ah so 61-39 and not 61/49 (which was written but that is 110% :) ). if You can share the original FIT file of the Rally's activity that would be good for raw analysis (that is it radio signal issue or just a bad offset in one of the pedals, could be the left is too high or the right is too low)

i checked your both activities, the Assioma was very close to the math (with 67+10) on the hill, but with the Rally it is very low , 40watts lower (232w instead of 272w) . so probably the right pedal is low (or there are lots of signal drops with 0 right values, from the FIT file we will be able to see, pls share it in ZIP format, the FIT extension is not allowed on the forum somewhy and You get error message). did You try to remove the batteries, put them back, new angle setup (if it needed, i dont have Rally luckily), and do a manual zero calibration?

here is the .fit file of the activity as requested10718395993.zip

10737877008.zip10737875577.zip

yes, the first thing i did was replace the batteries with new ones, reset installation and calibration angles. today I did an indoor workout and compared the values ​​of the garmin rallies connecteHuggingto the 1030 with those of the trainer connected to the fenix pro....
the values ​​were almost the same, only as the power increased the trainer underestimated by about 10/15 watts.
I insert the twoHuggingfit files of the indoor session.
one reason I could give for the underestimation of the rally pedals could be that I went on a trip with the bike in the car and did not calibrate it before the race could this be the reason for this underestimation of watts? thank you so much for your help

what kind of Elite indoor trainer do You have? from Direto family or something else? (i cant guess it from the firmware number :)  )