This is unpatched main (U1) firmware for Axpert Max 7.2kW. dsp.hex is dated 2022/Sep/11. Like all factory firmwares for Axpert Max so far, it has the premature float bug and the stuck at 90 V MPPT bug. Provided here as a failsafe/backup.
Use at your own risk. Do not use with other Max models, clones, etc. Compatible genuine models include the Kodak OG-MAX 7.2, PIP-7248MAX, and many more.
Edit: Do not confuse with patched firmware version also called 90.19 (not mine), based on this factory firmware.
Edited by Coulomb