I've noticed there are some extra options on the app but it seems you can't use these if the firmware doesn't allow for it (I tried to enable "MPPT Multi-Point Scanning" in the app but this is not visible on the inverter screen). Does anyone know what the "PV1 Selfcheck" and "PV2 Selfcheck" options do on the Advanced Settings section on the app?

12 kW three phase updated today due to issues

SW Ver.： M 2006-1172 / S  18-07 / C 1001-E04F

Recent SunSynk 16KW Inverter firmware update

M 9.0.2.8 / S 1.7.2.6 / C E.4.4.0

Now also have "PV1 Selfcheck", "PV2 Selfcheck" and "PV3 Selfcheck". I enabled them but have no idea what they do 😁

Hi Everyone.

Whilst I like to keep my 5KW updated with the latest firmware, I am hesitant to do it the 3rd time.

The first update, the inverter was incorrectly confirgued and warning sounds came from it. It turns out it wanted to recognize my battery as an 200A.

The second time and current version COMM:E43D - MCU:3387-0513 caused the up arrow to "stick" Its not that I have to press the up button at all. If I press on a setting it ramps up. I had to make all my changes via the Solarman App and avoid the touch screen at all costs.

I have to come clean though. This happend last year and since I am now on holiday for 2 weeks. It seems the best time to try and sort this out. Though I have no other issues at all.

Any suggestions? Though I tink upgrade most likely will fix it.

Edited July 7, 2025Jul 7 by Robert1981
spelling

My Sunsynk 8kW ecco hybrid inverter (SYNK-8K-SG05KP1) has firmware: M 5.3.8.6 / S  1.5.1.5 / C E.4.3.8

Is that the latest and greatest, please?

On 2025/07/07 at 6:39 PM, Robert1981 said:

Hi Everyone.

Whilst I like to keep my 5KW updated with the latest firmware, I am hesitant to do it the 3rd time.

The first update, the inverter was incorrectly confirgued and warning sounds came from it. It turns out it wanted to recognize my battery as an 200A.

The second time and current version COMM:E43D - MCU:3387-0513 caused the up arrow to "stick" Its not that I have to press the up button at all. If I press on a setting it ramps up. I had to make all my changes via the Solarman App and avoid the touch screen at all costs.

I have to come clean though. This happend last year and since I am now on holiday for 2 weeks. It seems the best time to try and sort this out. Though I have no other issues at all.

Any suggestions? Though I tink upgrade most likely will fix it.

Just an update on this. Tried to google my issue via the Gemini AI app. It suggested an reboot since it can happen that firmware updates don't usualy go according to plan. So I tried and it actually worked. Now I can press any arrow and make changes directly on the inverter without any issues.

Upgraded my 8 kW Sunsynk inverter firmware yesterday. Latest version is M 6.0.2.7 / S 0.7.1.7 / C E.4.3.D

On 2025/07/25 at 9:54 AM, Gambit said:

Upgraded my 8 kW Sunsynk inverter firmware yesterday. Latest version is M 6.0.2.7 / S 0.7.1.7 / C E.4.3.D

How do I upgrade the inverter?

3 hours ago, Morne van der Merwe said:

How do I upgrade the inverter?

I used the method discribed in the support pdf here https://support.sunsynk.com/support/solutions/articles/103000295813-how-to-request-a-firmware-upgrade-customers- . My inverter was upgraded about an hour afterwards.

10kw 3-phase inverter updated last night to:

M 2005-1172

S 18-07

C 1001-E050

This was to try and resolve battery voltage overshooting BMS request when solar export is limited. No help unfortunately and Sunsynk state it's the latest firmware available 😔

Here are the latest versions and details for global Sunsynk rollout, left out a couple which have very little deployment like 20kw, all Single Phase and 50kW 3Phase - As of 2025-12-13

If you need anything specific let me know.

	2nd Latest Version	Latest Version	Most Common	Number of Inverters
3.6kW	3.1.6.2	3.3.6.3	2.3.8.1	11296
5kW	3.3.8.7	3.3.8.8	3.3.8.2	51505
6kW	4.3.8.5	4.3.8.8	4.0.1.4	143
8kW	6.0.2.7	6.0.2.8	6.0.2.2	53379
10kW	B.0.2.7	B.0.2.8	B.0.2.4	747
12kW	A.0.2.8	B.0.2.6	A.0.2.4	554
16kW	9.0.2.7	9.0.2.8	9.0.2.2	7371
50kW	3103-F081	3103-F097	3102-1061	3366

19 minutes ago, Morelz said:

Here are the latest versions and details for global Sunsynk rollout, left out a couple which have very little deployment like 20kw, all Single Phase and 50kW 3Phase - As of 2025-12-13

If you need anything specific let me know.

	2nd Latest Version	Latest Version	Most Common	Number of Inverters
3.6kW	3.1.6.2	3.3.6.3	2.3.8.1	11296
5kW	3.3.8.7	3.3.8.8	3.3.8.2	51505
6kW	4.3.8.5	4.3.8.8	4.0.1.4	143
8kW	6.0.2.7	6.0.2.8	6.0.2.2	53379
10kW	B.0.2.7	B.0.2.8	B.0.2.4	747
12kW	A.0.2.8	B.0.2.6	A.0.2.4	554
16kW	9.0.2.7	9.0.2.8	9.0.2.2	7371
50kW	3103-F081	3103-F097	3102-1061	3366

Brilliant! How on earth did you find this out? Do you work at Sunsynk or Deye?

22 minutes ago, Morelz said:

Here are the latest versions and details for global Sunsynk rollout, left out a couple which have very little deployment like 20kw, all Single Phase and 50kW 3Phase - As of 2025-12-13

If you need anything specific let me know.

	2nd Latest Version	Latest Version	Most Common	Number of Inverters
3.6kW	3.1.6.2	3.3.6.3	2.3.8.1	11296
5kW	3.3.8.7	3.3.8.8	3.3.8.2	51505
6kW	4.3.8.5	4.3.8.8	4.0.1.4	143
8kW	6.0.2.7	6.0.2.8	6.0.2.2	53379
10kW	B.0.2.7	B.0.2.8	B.0.2.4	747
12kW	A.0.2.8	B.0.2.6	A.0.2.4	554
16kW	9.0.2.7	9.0.2.8	9.0.2.2	7371
50kW	3103-F081	3103-F097	3102-1061	3366

Just checked my 12kW:

SW Ver.：M 2005-1172 / S  18-07 / C 1001-E04F

How does this correlate with the version scheme in your table?

16 minutes ago, Planck said:

Just checked my 12kW:

SW Ver.：M 2005-1172 / S  18-07 / C 1001-E04F

How does this correlate with the version scheme in your table?

The above is as mentioned all for single phase inverters and only the master versions, can publish the HMI and slave versions as well if you want(You get a 12kW SP as well), and the 50kW 3Phase. Working on the 3Phase data , as due to Sunsynk standards they don't have proper naming like all the other inverters. Already have the 12kw 3P, latest master version is 2005-1175, will publish full list once its complete

26 minutes ago, Planck said:

Brilliant! How on earth did you find this out? Do you work at Sunsynk or Deye?

Lol have to keep the sources anonymous :) And no, don't work for them. Have both the Synsynk and Solark info.

On 2025/12/13 at 11:40 AM, Morelz said:

The above is as mentioned all for single phase inverters and only the master versions, can publish the HMI and slave versions as well if you want(You get a 12kW SP as well), and the 50kW 3Phase. Working on the 3Phase data , as due to Sunsynk standards they don't have proper naming like all the other inverters. Already have the 12kw 3P, latest master version is 2005-1175, will publish full list once its complete

Please do post publish the HMI and slave versions, it will be most helpful.

Also, does your source actually have the firmware? Multiple calls to Sunsynk, and each time they tell me different versions are latest and greatest for my 16 kW, but your list seems newer. My pant reports M 9.0.2.7 / S 1.7.2.6 / C E.4.3.D

(which come from MCU1-SG-Ver0000-E43D-CK.bin and MCU2_9027US_NC_NR16K59V.bin)

Halo everybody. Can a sunsink/deye clone be upgraded with any of the sunsynk/ deye software?

Say for instance I have an 8kw Deye Clone and I want to pair it with an 8kw sunsynk inverter can I upgrade both inverters using the same software/firmware to wotk in parralel?

On 2026/01/06 at 8:46 AM, Gunther said:

Please do post publish the HMI and slave versions, it will be most helpful.

Also, does your source actually have the firmware? Multiple calls to Sunsynk, and each time they tell me different versions are latest and greatest for my 16 kW, but your list seems newer. My pant reports M 9.0.2.7 / S 1.7.2.6 / C E.4.3.D

(which come from MCU1-SG-Ver0000-E43D-CK.bin and MCU2_9027US_NC_NR16K59V.bin)

I'll share the full list , however for your 1Phase 16KW, the latest versions are as follows

Master 9.0.2.8

HMI : E.4.4.3

Software 1.7.2.6

There are around 400 Inverters running with the latest 9.0.2.8 Software across the world

Nope, for firmware upgrades you have to contact sunsynk or via your installer, sunsynk makes this more difficult than it needs to be

My SunSynk 5kw inverter had a firmware update yesterday, so new firmware is MCU 3388 and E440, since this update the earth neutral bond is permanently on now (in the outputdB), this used to only come on when the grid failed and then would go off after 30 to 60 seconds once the grid was back. Any body else have this issue before any suggestions, have done a complete power off waited 5 min and turned back on same issue.

Hi All, we have added the Sunsynk version tracker to our free portion of our PVBiz Web App. You can check the top 10 latest versions per inverter rated power as well as the 3 most used versions. - It gets updated weekly

This covers all 1Phase Low Voltage and 3Phase High Voltage. Low Voltage 3Phase are combined for now and work in progress

https://app.pvbiz.co.za/sunsynk-fleet-versions

Let me know if you have any questions or feedback :)

On 2026/03/24 at 8:07 AM, Greglsh said:

My SunSynk 5kw inverter had a firmware update yesterday, so new firmware is MCU 3388 and E440, since this update the earth neutral bond is permanently on now (in the outputdB), this used to only come on when the grid failed and then would go off after 30 to 60 seconds once the grid was back. Any body else have this issue before any suggestions, have done a complete power off waited 5 min and turned back on same issue.

I have a 5kw Sunsynk inverter with the following firmware, MCU:3382 and COMM: E426 which according to the list above from Morelz it is not the latest firmware update available.

The latest firmware for a Sunsynk 5kw single phase inverter evidently being MCU:3388 and E440.

After reading several posts including the post above I would like to know if it is at all necessary let alone wise to update the firmware of my inverter given the fact that there is nothing really that I am aware of that suggests I need to update the firmware.

I most certainly do not want to experience any faults or issues that do not currently exist after having updated my current firmware with the latest firmware, however I am not opposed to the latest technological upgrades and fixes normally associated with updates of any kind provided they add positive value.

Your thoughts please?

On 2026/04/07 at 12:16 PM, Gooney Bird said:

I have a 5kw Sunsynk inverter with the following firmware, MCU:3382 and COMM: E426 which according to the list above from Morelz it is not the latest firmware update available.

The latest firmware for a Sunsynk 5kw single phase inverter evidently being MCU:3388 and E440.

After reading several posts including the post above I would like to know if it is at all necessary let alone wise to update the firmware of my inverter given the fact that there is nothing really that I am aware of that suggests I need to update the firmware.

I most certainly do not want to experience any faults or issues that do not currently exist after having updated my current firmware with the latest firmware, however I am not opposed to the latest technological upgrades and fixes normally associated with updates of any kind provided they add positive value.

Your thoughts please?

Update your firmware if you having issues, no issues, don't update. I should have just stayed on the firmware I was on. I did sort out the earth bond, by shutting everything down, turning off incoming power etc. The problem I have now is my screen on the inverter is a purple colour. I have tried the holding the key in to reset the screen but it stays that purple colour???

Im running M 3.3.8.2 / S 1.5.1.5 / C E.4.2.6 on my 5KW Single phase LV Hybrid

Age old question different in each industry.
Do i upgrade the firmware to the latest?
Where can i see change logs?