On 2022/04/28 at 6:34 PM, Creatura said:

when i try to flash my EASUN 5kw MK II hibrid inveter i get an error "Can not open serial port" .

I assume you're read posts like this, selecting the correct comms port, etc. [ Edit: also, you can't use the USB port, so you have to have a suitable USB to RS-232 adapter. It's all in the linked post. ]

EaSuns are likely clones; if so, there is no guarantee that you can steal Voltronics firmware and have it work. Some clones simply can't be updated at all.

I actually thought that the EaSuns would be updatable. I'm not even 100% sure that they are clones; they do look convincing, though this site says that they definitely are clones.

For other readers looking to avoid clones, any recently manufactured Axpert VM II like machine is likely to be a clone. There has been a spate of them recently, and my understanding is that Voltronic (the manufacturer of all the genuine brands, that have brands like Mecer, MPPSolar, and many many others) haven't made a VM II in years (the VM III basically supersedes it). The VM III has the removable display, the VM II has the older display with the four buttons. There are still genuine models with the older display, but these are now mostly the MKS models, with the 145 V max PV voltage, or the KS models with even lower maximum PV voltage (and PWM Solar Charge Controllers). Of course, the resellers are free to name the models what they like, so it's probably worth looking at the Voltronics web site to see if the one you're considering buying looks very similar to one that's on that site.

Edited April 29, 20224 yr by Coulomb

Well i am using the original cable that they gave me. 

From there i use this https://www.emag.ro/cablu-aten-usb-to-rs-232-adapter-35cm-uc232a/pd/D47K07BBM/ adapter. Using this adapter i can read data from EaSun inverter.

The problem is that i have EaSun iGrid SV II 5kw not MK II :-S 

And yes, i have changed the COM from COM1 to COM9.. all of them..

 

On 2022/04/30 at 2:53 AM, Creatura said:

The problem is that i have EaSun iGrid SV II 5kw not MK II :-S 

It could well be. But it could also be that the USB to RS-232 adapter you have uses a chip other than the PL2303 chip which is known to work. More here.

Hi . Can someone please help me with a U1 71 80 MK11 5K . I have a 90 error code and cannot find software upgrade 

On 2020/08/12 at 6:41 PM, Jaco P Bloem said:

..one thing I do not have is good monitoring software! Are you using ICC on the Raspberry Pi?

My first installation (2019) is 12 x 330W Canadian Solars, the array is two parallel strings of 6 in serie each.

I have now added the second inverter with 8 x 360W Panel array all in serie to the second inverter - running in parallel with the first Axpert.

Hats of to the mppt chargers referencing different input voltages (223V DC on the one and 317V on the other), and still maintaining equal power drawn. When the load exceeds the capability of one of the PV arrays, then only will the first array ( my old set) supply more than the other - to a point where both give max for the time of day.. 

Just by watching the Displays and WatchPower I do not see major fluctuations (227 to 233 Vac which is 1.3%) but I will have to record the Voltages to see if I have a similar drop - that you and others have noticed.

It's difficult to comment on your graphs as one must compare them with the Voltages and also I am sure you have Battery usage and charging as well (?). 

Thanks for sharing! 

((PS: I see a 10% PV power increase in my old array each time I wash the panels - it's dusty in Bloem! 😅))

Jaco P

Hi @Jaco P Bloem are you maybe available to assist a Newby with the update in Bloemfontein.

 

I have the same inverter as you but can't seem to find the cables. 

Any assistance would be greatly appreciated. 

 

Hi, yes I will gladly assist..

I have an old laptop I use with a series port and the Axpert cable. We just need to be very careful to use the correct Firmware file, if you can source the latest file for your inverter (always best to ask your supplier or the specialist in this Forum if you do not have the new firmware).  You can email me privately so we can discuss 🙂

Kind Regards 

Jaco 

On 2020/08/12 at 6:41 PM, Jaco P Bloem said:

..one thing I do not have is good monitoring software! Are you using ICC on the Raspberry Pi?

My first installation (2019) is 12 x 330W Canadian Solars, the array is two parallel strings of 6 in serie each.

I have now added the second inverter with 8 x 360W Panel array all in serie to the second inverter - running in parallel with the first Axpert.

Hats of to the mppt chargers referencing different input voltages (223V DC on the one and 317V on the other), and still maintaining equal power drawn. When the load exceeds the capability of one of the PV arrays, then only will the first array ( my old set) supply more than the other - to a point where both give max for the time of day.. 

Just by watching the Displays and WatchPower I do not see major fluctuations (227 to 233 Vac which is 1.3%) but I will have to record the Voltages to see if I have a similar drop - that you and others have noticed.

It's difficult to comment on your graphs as one must compare them with the Voltages and also I am sure you have Battery usage and charging as well (?). 

Thanks for sharing! 

((PS: I see a 10% PV power increase in my old array each time I wash the panels - it's dusty in Bloem! 😅))

Jaco P

Hi @Jaco P Bloem are you maybe available to assist a Newby with the update in Bloemfontein.

 

I have the same inverter as you but can't seem to find the cables. 

Any assistance would be greatly appreciated. 

 

19 hours ago, Jaco P Bloem said:

We just need to be very careful to use the correct Firmware file,

Indeed. I note that the photo is of an Axpert MKS of some sort (because of the 145 V max solar voltage), not the MKS II that is in the title of this thread. These will need completely different firmware.

@Coulomb Thank you for the reply, is there any software for this type of inverter maybe?

I have it running with a Dyness 4.8kw/h battery and don't want to damage this battery seeing that it's quite expensive 😅

Thank-you @Coulomb we will carefully check if this inverter from @KwaadbaarD is not a clone.

From the model number, should your post on the firmware for the 48V model not be applicable?

https://forums.aeva.asn.au/viewtopic.php?p=77943#p77943

Regards!

My current firmware is U1 74.40

8 hours ago, KwaadbaarD said:

My current firmware is U1 74.40

From this and the photo of your label, then yes patched firmware version 74.40e will work with your model. There is an LFP flavour available, if you're running an LFP battery, and an LC flavour for other chemistries (lead acid, but also a few battery modules with BMS that use NMC cells, e.g. Hubble).

I was confused because you have posted in an Axpert MKS II thread, and your model is not an Axpert MKS II (It's an Axpert MKS PF1 without the 64 V "feature"). You will have to find your RJ45 to RS-232 cable that came with the inverter, or make your own. It's unlikely that you can buy one off the shelf that has the right wiring. Edit: Or perhaps Jaco can provide his for the update.

Edited May 11, 20233 yr by Coulomb

Great, thanks! Yes I will assist with the cable, laptop and software with instructions (from the Topic feed given earlier)..

Thanks @Jaco P Bloem @Coulomb for the awesome support and assistance 

On 2020/08/18 at 10:49 AM, Jaco P Bloem said:

Thank-you, I was wondering yes!

The update to 71.82 went well - all seem normal and stable this morning.. Although now it is snowing (possibly just  'ice rain') in the Free State - go figure!

But the PV is doing well, still charging (slower) and supply load through the clouds - no experience with other panels but the Canadian Solar performs well during overcast conditions. Will monitor..

I agree with the ICC issue, I monitor my batteries manually now and use WatchPower, at least to identify faults..

Kind Regards!

@Jaco P Bloem, did your SW upgrade solve the over voltage issue?

Hi Chris 

Yes. My system is stable after the previous update to 71.82 and I also did update a few months ago to 71.92.

All really functioning well, so just make sure about the correct firmware for your specific model then you should be good to go!

Kind Regards 

Jaco 

Thanks Jaco!  This is good news.
I have 2 SOL-I-AX-5NB inverters in parallel and will be upgrading to 71.82 soon then.

Regards

Chris

On 2020/08/17 at 7:36 PM, Jaco P Bloem said:

During the day with PV available and there is a low load while the batteries show 100%, the Inverter display battery Voltage (and WatchPower) will jump to over 60V!? I have seen a few ' battery Voltage high' faults recorded and that explains my infrequent early afternoon trips + resets. I am confident this is a measuring issue and not the battery BMS. 

This is exactly what I've experienced - The inverter will, at random times, push charge voltages as high as 65V to the point where the BMS disconnect the batteries and resets the system.  I have now upgraded to 71.82 and I really hope this issue is now something of the past.

5 hours ago, Jaco P Bloem said:

My system is stable after the previous update to 71.82 and I also did update a few months ago to 71.92.

What is the delta between 71.82 and 71.92?  Where can I download this firmware?

Hi Chris 

Yes. My system is stable after the previous update to 71.82 and I also did update a few months ago to 71.92.

All really functioning well, so just make sure about the correct firmware for your specific model then you should be good to go!

 

PS : I have posted the FW link to you in your mail box.

Not sure what the major difference is to 71.92, although always go for the latest as long as it is stable (mine is).

There are two additional settings in 71.92 :

14)Lbd/E and 15)Nbd/E

But I will be honest, not sure if they function. Thought it might be the coupling of the Neutral - but my Neutral is connected to earth at the inverter.

Kind Regards 

Jaco 

Edited July 15, 20241 yr by Jaco P Bloem

On 2024/07/16 at 12:54 AM, Jaco P Bloem said:

My system is stable after the previous update to 71.82 and I also did update a few months ago to 71.92.

The MKS II is an older model. I'm not aware of any firmware later than 71.86. The 71.xx firmware version number range overlaps with several others, including Axpert King 1 and Axpert MKS III, although the latter are possibly compatible (same main hardware, different display).

Please check firmware carefully before updating. Fortunately, Axpert King firmware has a different reflash command than other firmwares, so the chances of bricking are low. But the chances of confusion are high.

@Jaco P Bloem, did you mean 71.86 instead of 71.92?

Hi @Coulomb, I'm glad you have picked up on the conversation.

My Inverters (2 in parallel of the 5kW Axpert MKII) are both on 71.92. Fortunately it runs stable since the update about 5 months ago.

I found the firmware from a link my supplier send years ago. I'm not sure of the rules to post the link, I will rather send this on your inbox, so you can check?

There is an additional setting 14 and 15 as mentioned.. 

Keep well!

Jaco 

44 minutes ago, Jaco P Bloem said:

I found the firmware from a link my supplier send years ago. I'm not sure of the rules to post the link, I will rather send this on your inbox, so you can check?

Ah, thanks.

I'd rather not publish where that firmware originally came from, instead I'll upload it here as I have uploaded many other firmwares.

This is factory firmware version 71.92 for the Axpert MKS II 5K-48 PF1 '2809. The hex file is dated 21/Dec/2021. Do not use with any other model. Not to be confused with the Axpert King 1 firmware with the exact same firmware version number. Use at your own risk.

Firmware upload instructions for models with no removable or round colour display.

AxpertMKSII71.92.rar

Edited June 12, 2025Jun 12 by Coulomb

Much appreciated, thanks - yes I am normally hesitant and nervous to update (good thing) and do read up well before doing so. I am just glad the Overvoltage / sporadic trips have been solved..

On 2024/07/15 at 4:31 PM, Chrisbad said:

This is exactly what I've experienced - The inverter will, at random times, push charge voltages as high as 65V to the point where the BMS disconnect the batteries and resets the system.  I have now upgraded to 71.82 and I really hope this issue is now something of the past.

Just some feedback on this topic.  Five months after upgrading to 71.82, I again experienced the high charge voltage issue.  Have now upgraded to 71.92.  Touch wood........