Apsystems DS3 starting to derate inverters

[Jefferx]

Hello, over the past couple months, our Apsystems DS3 have been derated twice, first to 400w per channel and now 384w per channel. Prior to May 2023 we were able to configure the max power using the link below.

http://192.168.1.12/index.php/configuration/maxpower

Currently running version: 5251

Anyone know how to roll the inverts back to an older version and prevent them from remotely updating them? Not worried about the warranty implications, they've been terrible to work with so I wouldn't count on them anyways.

Thanks!

[davidcheok]

What do you mean by derated? The max power setting for the DS3 should be 440w. The inverters automatically drops power output to 400+ when the gets close to 90C and 360-380+ when it hits 90C until it drops to about 80C where it goes back up.