On 2026/04/10 at 1:58 PM, vankosolar said:

Hello, does anyone have firmware version 78.11 or 78.12 available?

MAXE11K_TWIN_DSP_78.11(1).7z

On 25‏/2‏/2026 at 16:39, Coulomb said:

هذا إصدار مُعدّل من البرامج الثابتة x78.10، مبني على إصدار البرامج الثابتة الأصلي 78.10 لجهاز Axpert Max E 11kW '28066 Twin. لا يُستخدم مع أي طراز آخر. تاريخ ملف hex الأصلي هو 26 يونيو 2025.

يعمل هذا البرنامج الثابت على حل مشكلة "التوقف عند 90 فولت" عن طريق تغيير عتبة التيار من 0.50 أمبير إلى 0.10 أمبير. كما أنه يُصلح خطأ "القيمة العائمة" المبكر، ويُغير رقم الإصدار المُبلغ عنه إلى x78.10. ستستمر الشاشة القابلة للإزالة في عرض الإصدار U1 78 10.

يُتيح هذا البرنامج الثابت أيضًا تغيير جهد الألواح الشمسية الذي يُحدَّد عنده تيار الشحن بـ 100 أمبير، من 360 فولت إلى 450 فولت. في كلتا الحالتين، يكون الرقم الأول في النسخة التي تتضمن هذا التغيير أعلى، بينما يكون الرقم الأول في النسخة التي لا تتضمنه أقل.

استخدمه على مسؤوليتك الخاصة؛ لا يمكنني اختبار هذا البرنامج الثابت لعدم امتلاكي جهاز Axpert Max. تم التحقق من سلامته من خلال تفكيك البرنامج الثابت والتأكد من وجود التغييرات المطلوبة.

تعليمات تحميل البرامج الثابتة: https://forums.aeva.asn.au/viewtopic.php?p=87767#p87767

اختر الحد الأدنى لجهد MPPT الذي يكون أعلى من جهد لوحة التشغيل حتى في ظروف الإضاءة الضعيفة.

dsp_978.10_patched.inv: الحد الأدنى لجهد MPPT هو 90 فولت. لجهد لوحة منخفض جدًا. يوجد تصحيح حد الشحن 100 أمبير.

dsp_878.10_patched.inv: الحد الأدنى لجهد MPPT هو 90 فولت. لجهد لوحة منخفض جدًا. لا يوجد تصحيح حد الشحن 100 أمبير.

dsp_578.10_patched.inv: الحد الأدنى لجهد MPPT هو 150 فولت. تم وضع رقعة تحديد الشحن 100 أمبير.

dsp_178.10_patched.inv: الحد الأدنى لجهد MPPT هو 150 فولت. لا يوجد تصحيح حد الشحن 100 أمبير.

dsp_378.10_patched.inv: الحد الأدنى لجهد MPPT هو 200 فولت. تم وضع رقعة تحديد الشحن 100 أمبير.

dsp_278.10_patched.inv: الحد الأدنى لجهد MPPT هو 200 فولت. لا يوجد تصحيح حد الشحن 100 أمبير.

<font dir="auto" style="vertical-align: inherit;"><font dir="auto" style="vertical-align: inherit;">dsp x78.10 Max E 11kW '28066 Twin patched.zip</font></font>

MAXE11K_TWIN_DSP_78.11(1).7z

This is patched firmware version x78.11, based on factory firmware version 78.11 for the Axpert Max E 11kW '28066 Twin. Do not use with any other model. The original hex file is dated 23/Sep/2025.

This firmware works around the "stuck at 90 V" problem by changing the current threshold from 0.50 A to 0.10 A. It also fixes the premature float bug, and changes the reported version number to x78.11. The removable display will continue to show version U1 78 11.

This firmware also optionally changes the PV voltage at which the charge current is limited to 100 A from 360 V to 450 V. In each case, the version with this change has the higher first digit. The version without this change has the lower first digit.

Use at your own risk; I cannot test this firmware as I do not own an Axpert Max. It has been "sanity checked" by disassembling the firmware and confirming that the intended changes are present.

Firmware upload instructions: https://forums.aeva.asn.au/viewtopic.php?p=87767#p87767

Choose the minimum MPPT voltage that is higher than your working panel voltage even in poor light.

dsp_978.11_patched.inv: Minimum MPPT voltage 90V. For very low panel voltage. The 100A charge limit patch IS present.

dsp_878.11_patched.inv: Minimum MPPT voltage 90V. For very low panel voltage. The 100A charge limit patch is NOT present.

dsp_578.11_patched.inv: Minimum MPPT voltage 150V. The 100A charge limit patch IS present.

dsp_178.11_patched.inv: Minimum MPPT voltage 150V. The 100A charge limit patch is NOT present.

dsp_378.11_patched.inv: Minimum MPPT voltage 200V. The 100A charge limit patch IS present.

dsp_278.11_patched.inv: Minimum MPPT voltage 200V. The 100A charge limit patch is NOT present.

dsp x78.11_patched Max E 11kW Twin.zip

On 2026/02/25 at 2:39 PM, Coulomb said:

This is patched firmware version x78.10, based on factory firmware version 78.10 for the Axpert Max E 11kW '28066 Twin. Do not use with any other model. The original hex file is dated 26/Jun/2025.

This firmware works around the "stuck at 90 V" problem by changing the current threshold from 0.50 A to 0.10 A. It also fixes the premature float bug, and changes the reported version number to x78.10. The removable display will continue to show version U1 78 10.

This firmware also optionally changes the PV voltage at which the charge current is limited to 100 A from 360 V to 450 V. In each case, the version with this change has the higher first digit. The version without this change has the lower first digit.

Use at your own risk; I cannot test this firmware as I do not own an Axpert Max. It has been "sanity checked" by disassembling the firmware and confirming that the intended changes are present.

Firmware upload instructions: https://forums.aeva.asn.au/viewtopic.php?p=87767#p87767

Choose the minimum MPPT voltage that is higher than your working panel voltage even in poor light.

dsp_978.10_patched.inv: Minimum MPPT voltage 90V. For very low panel voltage. The 100A charge limit patch IS present.

dsp_878.10_patched.inv: Minimum MPPT voltage 90V. For very low panel voltage. The 100A charge limit patch is NOT present.

dsp_578.10_patched.inv: Minimum MPPT voltage 150V. The 100A charge limit patch IS present.

dsp_178.10_patched.inv: Minimum MPPT voltage 150V. The 100A charge limit patch is NOT present.

dsp_378.10_patched.inv: Minimum MPPT voltage 200V. The 100A charge limit patch IS present.

dsp_278.10_patched.inv: Minimum MPPT voltage 200V. The 100A charge limit patch is NOT present.

dsp x78.10 Max E 11kW '28066 Twin patched.zip

Hello, greetings and many thanks for the efforts. I have easun swm 11kw twin with detachable display, I have flashed 978.10 from the above post over original 78.10 firmware, but I still have charging limited to 100A.

Any ideas?

Thanks, regards.

EDIT:

I think that could be because my grid voltage is extremely high (253-257v) and if I read correctly >250v is a derating condition while my inverter temperature is around 47-50*C.

If I turn off the grid, it goes to 115-120A for a short while, and then capped to 100A again.

Is 0v grid also a derating event?

Regards

Edited May 29May 29 by system64

On 2026/05/28 at 6:26 PM, system64 said:

If I turn off the grid, it goes to 115-120A for a short while, and then capped to 100A again.

That would seem to indicate that the patch is working.

On 2026/05/28 at 6:26 PM, system64 said:

Is 0v grid also a derating event?

I would not think so. At a quick glance, I don't see any derating related to line voltage.

Is it possible that you don't have more than about 5 kW of PV power (100 A at ≈50 V battery) available at this time of year?

Is the 115-120 A charging repeatable?

Hi,

sorry for silly question. I am newby here.

If i have Axpert iSolar SMW 11kW TWIN (U1 78.08 + U2 38.18) can i update with patched 78.11 (978.11)? No EEPROM mismatch issue?

Thanks in advance for advice.

Edited June 10Jun 10 by bruno1975

On 25.09.2023 at 22:08, Br999 said:

Всім привіт, у мене є Axpert Max 2 11k Twin з прошивками u1 75.00 та u2 39.04. Хтось бачив/знайшов ці прошивки?
Дякую!

Привіт .Я так розумію ти з України ? Чи знайшов прошивку ,можеш поділитися ?

Hi everyone,

I am facing the notorious MPPT stuck bug on my Voltronic Axpert Max II inverter and am looking for a firmware update or a patched version to fix it.

My current system specifications:

• Inverter: Axpert Max II

• Main CPU Firmware: 75.01

• Secondary CPU (HMI) Firmware: 39.06

• PV Array: 11 panels in a single series string (Vmp is around 37V per panel, total Vmp under load is approx. 407V).

The Problem:

Even though my total string voltage under load should ideally sit around 400V, the MPPT tracker regularly drops down and gets stuck at exactly 90V (the absolute minimum PV threshold). When this happens, PV production drops to almost zero (10-50W).

A manual PV disconnect/reconnect via the circuit breaker forces a rescan and brings the voltage back to normal, but it gets stuck at 90V again as soon as there is a passing cloud or a shift in solar irradiance.

Could anyone please share a newer factory firmware or a stable patched firmware for the 75.XX series that resolves this MPPT scanning/freezing issue?

Any help, links, or advice would be greatly appreciated. Thank you!