About This File
Deprecated! Use patched firmware version 156.05 instead, which patches MPPT2 as well as MPPT1. I will delete this download when 156.05 is tested.
This is temporary patched firmware version 256.05, based on main firmware version 56.05 for the Axpert Max II 10kW. it changes only two things (apart from the version number): it fixes the premature float bug, and changes FOR MPPT1 ONLY the current at which it switches behaviour from 0.50 A to 0.05 A. MPPT2 is not changed, so that some users with similar arrays connected to MPPT1 and MPPT2 can compare the effects.
If this works, I'll patch MPPT2 similarly. If if doesn't, I'll do the full set of "stuck at 90 V" patches.
This firmware is for the TMS320F2809 processor, which is the one with the two voltage regulators (see this post). Do not use with other inverter models.
Original dsp.hex is dated 2022/Mar/16. Hence factory firmware version 56.05 appears to supersede Axpert Max 10kW firmware version 90.01.
Use at your own risk.
Edited by Coulomb
Added link to 156.05; can't delete this one.