I hate to be the bearer of bad news like your friend is, but my two PWs installed on 1/2/20 are still in the solid 13's with nominal_full_pack_energy: 26963I recently worked with a neighbor who had his 2 PW system installed about 6 months before mine in April 2019. I showed him how to access the system status. Both of his PW's were showing capacity in the 13's. My 2 PW's are in the 10's as of today. I agree with you that there is no way my PW's had 13.5 at the start if someone with the same climate conditions is seeing no degradation. Unfortunately, I have no way to prove it.