Files

Main firmware for the Axpert MKS series 1-3 kVA, six models:
Rating W/VA/Bat V
800/1000/24
1000/1000/48
1600/2000/24
1600/2000/48
2400/3000/24
2400/3000/48
This firmware is for the Freescale HCS08 processor (8 bit). Ver0254.s19 (like a hex file) dated 29/Mar/2016,
Use at your own risk.

As the title suggests

This is patched firmware version 156.05, 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 the current at which it switches behaviour from 0.50 A to 0.05 A. The same change is replicated now in MPPT2.
This seems to work; if it turns out that it doesn't, I'll do a full patch set. See this post and those following it for test results of patched firmware version 256.05 (which had only MPPT1 patched).
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. 

This is patched firmware version 192.04, based on main firmware version 92.04 for the Axpert Max 1 8 kW, with the removable display.
This firmware is for the TMS320F28066 processor, which is the one with the single voltage regulators (see this post). Do not use with other inverter models. 
Original VP5K.inv (hex) is dated 2022/Sep/22. 
The patches change the version number (will still display as 92.04 on the display), fixes the premature float bug, and implements Georg's patch set for the "stuck at 90V" bug. The minimum MPPT voltage is set at 175 V. For a 200 V version, see patched firmware version 92.06. The MPPT voltage and firmware version are the only differences between this and 92.06.
Use at your own risk. 

This is Axpert MAX II 10kW main DSP firmware version 90.01, using the TMS320F2809 processor.
DO NOT USE with a machine that uses the newer TMS320F28066 processor, though the reflash tool should prevent bricking by not attempting a reflash.
Use at your own risk.

Troubleshooting Guide for Growatt Off Grid High Frequency Inverters (Ver1.1) 2021-12-21
This document is applicable for Off Grid High Frequency inverters, including SPF 5000TL HVM WPV, SPF 3500ES, SPF 5000ES

Felicity Solar Lithium battery pairing instructions for the Deye & Sunsynk Inverters. 

EXTREME CAUTION! Displays have been bricked!
This is Axpert Max 1 (NOT Axpert Max II with the fixed colour display) firmware version 112.19 (displays as U2 12 19 on the front panel). The leading "1" seems to be very significant. I suspect that it means that the display uses a GigaData MCU chip as opposed to a ST Microsystems MCU, but this is not yet confirmed.
ONLY CONSIDER USING THIS FIRMWARE IF YOUR EXISTING FIRMWARE IS 112.xx.

As always, use at your own risk. As of mid November 2022, this should probably only be used to attempt to rescue a bricked display.
This firmware should be usable (with the above caveats) on all Max models (7.2, 8, or 11 kW), but NOT other models, unless existing firmware is 112.xx.
I don't know what features or bug fixes this firmware contains, sorry.

The manual is for the 16S, 100Ah version of the battery with CAN and RS485 comms

The manual is for the 15S and 16S, 100Ah versions of this battery with RS232 and RS485 comms

Reading live data from Goodwe ES Power Inverters from Local Area Network for Windows XP, 7, 8.1 and 10. Shows data sent by UDP packets. Installation instructions inside the .zip file. Please comment on any errors found. Any suggestion is welcome.
Version 1.0: November 7, 2020
Version 2.0: January 22, 2021
Version 3.0: May 16, 2021
Version 4.02 Oct 25, 2022
Youtube short video In Operation: Version 4.0 beta
https://youtu.be/n1VqTTDbcQ8
 
 

MPS-V-5000-48 IEC test report. Contains component details also. For clone device..

Manual for luxpowertec 5kw hybrid inverter.

Main (DSP) firmware for the 5kW Axpert King 1 (NOT Axpert King II) with 145 V max PV, version 72.00. The main difference from previous firmware version 71.97 is that several chunks of code were moved around in an important, time critical interrupt routine. So the effects of this change are hard to gauge.
dsp.hex is dated September 2022, but from the dates on other files, I suspect that this firmware was compiled in August 2021.
As always, use at your own risk, and don't use this firmware for any other model. But be aware that the Axpert King 1 5kW is called other names by various resellers, e.g. "PIP-5048MK" or "Kodak OG+ 5.48". Often the word "King" is in the model name, but of course no "II" (Roman numeral 2) after the "King".
Firmware Upload Instructions for Models with a Removable Display.
 

This is main (DSP, U1) firmware version 90.14 for the Axpert Max I  8kW (with removable display, not the Axpert Max II with the fixed colour display). So not use with other inverter models or models with other rated power (e.g. 7.2 kW or 11 kW), but be aware that the Axpert Max 8kW is sold with various names by various resellers. dsp.hex has the date 18/July/2022. Use at your own risk.

If you attempted to reflash your 8 kW MAX I with firmware version 91.04, then unfortunately the software in this file will not work. In that specific case, use the 90.14 recovery download instead.

DO NOT USE FILE "Max 8K 91.04 old flasher.zip"!
If you have downloaded it, delete it! If you have attempted to use it, I'm so sorry, it is possible that you have bricked your machine. It seems that 91.04 main DSP firmware, which claimed to be an Axpert MAX I 8kW firmware, is actually for an Axpert MAX II Dual output 8kW, and uses a different command to initiate reflashing.
If this has happened (you attempted to load 91.04 and now you can't reflash the inverter with any other firmware), download the recovery zip file, and run the recovery reflash tool. This should replace the incompatible 91.04 firmware with the latest factory Axpert Max I firmware that I have, which is version 90.14 (note the unfortunate similarity in version numbers). Do not use this download for any other purpose. Sadly, I don't have an Axpert MAX, so I can't test this procedure. The recovery reflash tool is identical to the old reflash tool, except that the reflash start command has been overwritten with the one that the Max II dual output firmware will be expecting.
If there are further problems, please let me (Coulomb) know in the forums or by PM.
My sincere apologies for any owners that have been inconvenienced by this mistake.
================= Earlier comment: ===============================
Axpert MAX 8 kW main firmware version 91.04. Copied VP5K.INV from another archive as dsp.hex; that archive had a new reflash tool with a virus in it. This combination should work, but is untested. Use at your own risk. This version from about August 2022 is supposed to have fixed some long standing problems with PV charging, e.g. pulling the panels down to about 90V and very little current under some circumstances.
Do not use with any other model, but as usual an Axpert MAX 8 kW can be branded many different names.

Main firmware update file for Axpert King II (NOTE: NOT for the original Axpert King with 145 V max PV). This version is supposed to fix "Can't charge the battery in ECO mode".
This is the version with dsp.hex dated February 2022; there is another version also called 50.02 with dsp.hex dated November 2021.
Use at your own risk. Firmware update instructions here.

This is a removable display firmware update file for Axpert MAX models: 7.2/8/3.6/4 kW, 48V or 24V. NOTE: NOT for MAX II models with the fixed display with round LED effects. The mcu.hex fils is dated 2022/Aug/16. Use at your own risk. Must be updated via a Windows PC, compatible USB to serial cable, and original RJ-45 to RS-232 (D9) cable. Firmware update instructions here. 

This is the display (MCU) firmware update file for an Axpert King RACK MOUNTED (not the ordinary upright inverter case!!) inverter. This model has a small white on blue built-in display, similar to the older Axperts. Do not use with any other model. This display firmware came with main (DSP) firmware version 75.08.

This is the main (DSP) firmware update file for an Axpert King RACK MOUNTED (not the ordinary upright inverter case!!) inverter. This model has a small white on blue built-in display, similar to the older Axperts. Do not use this firmware with any other model. Came with display firmware version 15.05.

Everything you need to know about wiring both DC & AC...please use at your own risk. I am not the author, I am just sharing this with the community. 

Installing a Generator with a Sunsynk will be highly useful for those who need guidance on the subject.

Solar PV Green Card Installation guidelines. 

A very interesting perspective in Aus the state of Victoria on PV guidance to compliance. 
DOC-20220827-WA0004..pdf

Shared & picked up on the forum on the reasons why a AC DB box might be split & the SANS regs discussion on why it's important & the labelling thereof. 
I am not the author of this document, I am just sharing it for the greater community.