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OwenPower

Axpert Inverter switching to battery power at midday.

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A question on a solar system in Zimbabwe using an Axpert 5kva inverter. On some days and not others, around midday, the inverter switches from supplying  solar power to using battery power. Come evening the pylon batteries are down to 3 lights. Zimbabwe at present only really receive grid power from around 10pm at night to about 5am the next morning. We have been through the settings on the inverter and made a few adjustments but have not sorted out the issue. Any advice would be much appreciated.

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42 minutes ago, OwenPower said:

Any advice would be much appreciated.

Hi Owen Welcome here on the forum. 

Please supply us with some more info so that we can try and assist you. 

  1. How many panels do you have and their Wattage, If you can maybe tell us how they are connected it will also help. For example  3 in series and 2 strings in parallel or something in that line.  
  2. How many batteries and their Amp Hour Rating   I see its Pylontech's, Ho many do you have and is it the US2000 or the US3000 Model. (Just to get a better picture of your system - I don't think they play a role)
  3. What is the load like when the inverter does this. 
  4. And then Lastly, the guys who really know the Axperts would like to know  the settings of your inverter, So it would be great if you can list them so long. 

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Here are the answers to your questions:

1. 9 panels of 335w each, connected in 3 arrays of 3 connected in series  to give 9 x 335w potential output

2. 2 x US2000 pylon batteries.

3.  Load at time of switch is either very low  or not much above 700 to 800 watts.

4. The guys in Zimbabwe  have changed settings a few times so I'm not sure of their current settings . Will come back to you as soon as I have these. May take a few days. Apologies.

 

Many thanks

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Hi Owen,

 

I am going to take a chance and guess the symptoms you are experiencing, and you can tell me if I am correct ;).

 

Your PV starts fine in the morning, and then charges the batteries until around midday, where it suddenly stops, the PV literally switches off, and then starts draining the batteries.  This scenario will then continue until the next morning, where the PV will start to charge the batteries again and the cycle will repeat itself..

Is this what you are experiencing?  If yes, please let me know, as I might have a couple of suggestions for you to try in that case..

Have a good one chat shortly!

 

Johan

 

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12 hours ago, Centurionsolar said:

Hi Owen,

 

I am going to take a chance and guess the symptoms you are experiencing, and you can tell me if I am correct ;).

 

Your PV starts fine in the morning, and then charges the batteries until around midday, where it suddenly stops, the PV literally switches off, and then starts draining the batteries.  This scenario will then continue until the next morning, where the PV will start to charge the batteries again and the cycle will repeat itself..

Is this what you are experiencing?  If yes, please let me know, as I might have a couple of suggestions for you to try in that case..

Have a good one chat shortly!

 

Johan

 

Hi Johan,  @Centurionsolar  i also have same problem as described above - could you please share

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Hi All, 

I have just joined the forum and trying to follow up on this conversation as I am experiencing the same issues with my Axpert inverter

was there any solution suggested?

Regards 

Elangeni

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Hi all,

I'm Dangreen. Experiencing almost same problem on my 5kva Axpert inverter. If I draw say 2 kW in afternoon, inverter stops charging from the panels. I have to switch off everything, reboot  and then it starts charging again. Could it be a setting?

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On 2019/10/08 at 3:46 PM, Dangreen said:

Hi all,

I'm Dangreen. Experiencing almost same problem on my 5kva Axpert inverter. If I draw say 2 kW in afternoon, inverter stops charging from the panels. I have to switch off everything, reboot  and then it starts charging again. Could it be a setting?

 

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On 2019/10/08 at 11:46 PM, Dangreen said:

Could it be a setting?

I don't believe so. This seems to be a new firmware bug.

If you users can pin down exactly when it happens, reliably, then it's possible we might be able to patch it.

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This happens when I use my borehole pump which draws 2000W, for an hour. Or when my wife uses the iron for about two hours (1270W). Then I have to reboot inverter before it charges from the panels again.

 

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HI Guys,

Ok, we see A LOT of systems posting to our www.centurionsolar.co.za cloud portal, and have thus far been able to collect the following information about this "event".

1.  It mostly happens with the high voltage mppt version, but we have also seen the 145VOC axpert do it.

2. Most of them are systems that are in parallel, but again we have also seen a few that weren't.

3.  Almost ALL of of them has the Solar power balance feature enabled, together with the "all inverters must see pv before pv ok".

From a fixing perspective, we have heard that plugging in watchpower and doing a factory reset on each inverter and after that setting the minimum settings (charger source priority, output source priority, battery type together with corresponding charge and discharge voltages) gets things going again.

There's also a new firmware patch out that people claim fixes it on the mksII (450VOC) version, here is the link (use daily for the password to unzip):

https://www.dropbox.com/sh/ct96idrzsroc48a/AAA3LJ4Q8Ddex7xCIqwsqbu5a?dl=0

That's about what I have so far, I hope it can help someone ;)

 

Kind Regards

 

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1 hour ago, Centurionsolar said:

HI Guys,

Ok, we see A LOT of systems posting to our www.centurionsolar.co.za cloud portal, and have thus far been able to collect the following information about this "event".

1.  It mostly happens with the high voltage mppt version, but we have also seen the 145VOC axpert do it.

2. Most of them are systems that are in parallel, but again we have also seen a few that weren't.

3.  Almost ALL of of them has the Solar power balance feature enabled, together with the "all inverters must see pv before pv ok".

From a fixing perspective, we have heard that plugging in watchpower and doing a factory reset on each inverter and after that setting the minimum settings (charger source priority, output source priority, battery type together with corresponding charge and discharge voltages) gets things going again.

There's also a new firmware patch out that people claim fixes it on the mksII (450VOC) version, here is the link (use daily for the password to unzip):

https://www.dropbox.com/sh/ct96idrzsroc48a/AAA3LJ4Q8Ddex7xCIqwsqbu5a?dl=0

That's about what I have so far, I hope it can help someone ;)

 

Kind Regards

 

Hi,

Do you maybe have the latest firmware for the Axpert King?  I'm currently on 71.50

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55 minutes ago, Kawaman said:

Hi Bloubul7,

I have on my Mecer SOL-I-AX-5M with versionMKS5K74.40P should I bother with your version. I have no issues as of yet.

Regards

Also running 74 40 no problems .

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3 hours ago, Kawaman said:

I have on my Mecer SOL-I-AX-5M with versionMKS5K74.40P should I bother with your version.

No. The Mecer SOL-I-AX-5M is NOT an Axpert MKS II; it has a 145 V max MPPT (please correct me if I'm wrong).

Frustratingly, there are exceptions, but generally firmware with a major version number of 74 (i.e. 74.XX) is not compatible with a firmware with any other major firmware version number (such as 71.71, which has a major version number of 71).

So it would not work any way. My preliminary analysis is that the firmware will NOT prevent you from trying this, so attempting to flash with an Axpert II firmware in an Axpert MKS machine (such as the Mecer SOL-I-AX-5M) won't work and could well result in a bricked machine.

Before updating firmware, please check my Can I update my firmware, and if so to what? post. It's slanted a bit towards patched firmware, and it's heavily slanted against 450 V SCC models, but still has a lot of information about what firmware revisions go with what machines.

Edited by Coulomb
Added slant against 450 V SCC models.

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8 hours ago, Centurionsolar said:

Ok, we see A LOT of systems posting to our www.centurionsolar.co.za cloud portal, and have thus far been able to collect the following information about this "event".

Wow!

This is really valuable data. Not to mention a firmware (you called it a patch, but it's a complete re-compile) that supposedly has the fix.

It's possible that I can find out what they've done, and patch other firmware for other models. But it seems to me that if there is a fix for this model, there should soon be a fix from the manufacturer for the other models as well.

I just checked, and the main premature float bug is still present in the this latest factory firmware, version 71.71. Sigh. But we can deal with that.

Thanks for whatever part you had in making this happen.

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On 2019/10/17 at 12:18 PM, Chris Louw said:

Also running 74 40 no problems .

Hi all,

I also experience this issue with the Axpert MKS 5K with BYD batteries and BMS.  I'm currently on version 74 20.  Would like to try out version 74 40 as mentioned by Chris Louw.

Can someone maybe direct me to a link where I can download it?

Thanks

Graham

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On 2019/11/06 at 9:54 PM, gbubb said:

Would like to try out version 74 40... Can someone maybe direct me to a link where I can download it?

The link is in a post by CenturionSolar 8 posts back in this topic.  Oops, that's 71.71 for 450 V models, with 64 V I believe.

Edit: It's in the attachment to this post by Kawaman.

Edit2: "non 64 V I believe" → "with 64 V I believe"

Edited by Coulomb

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This is good news, thanks @Centurionsolar

I've got the MPPSolar 5048MG (@71.40) so I guess can flash this Axpert MKS II 71.71 firmware, correct?

@Coulomb: I would really appreciate (and with me some others I know with a 5048MG) if you could patch this firmware! 😎

(also birdibird on AEVA)

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@birdibird The best is what I did and contact the official Agents of Mecer "Axpert" Inverters https://mustek.co.za/support/ 

If you are in Cape Town surrounds you can ask for a Mr. Craig Jacobs the Solar Expert at Mustek Cape town, have your Model Name ready, he will in-turn email you the correct firmware for you to flash.

Mustek are all over S.A choose your area in the link provided.

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On 2019/09/26 at 2:41 PM, OwenPower said:

A question on a solar system in Zimbabwe using an Axpert 5kva inverter. On some days and not others, around midday, the inverter switches from supplying  solar power to using battery power. Come evening the pylon batteries are down to 3 lights. Zimbabwe at present only really receive grid power from around 10pm at night to about 5am the next morning. We have been through the settings on the inverter and made a few adjustments but have not sorted out the issue. Any advice would be much appreciated.

Hi there I had the same problem with basically the same system but I realised it only happens when I monitor the system through Bluetooth if I do it through the PC I have no problems

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