@derek049, so it's possibly fixed in firmware version 20.14, recently posted on this forum. I haven't had a chance to check as yet. I have no idea why some models have 20.xx and some 36.xx. I'm really busy at present, so I can't put in the hours of analysis that would be needed.

You may care to approach your supplier, and ask for the latest firmware as you are sure that you have an issue that makes it not fit for purpose (I assume that's true).

Thanks Coulomb, I appreciate you taking the time to respond.  I've read so much about inverters turning to bricks I wouldn't try go from version 31.06 to 20.14. I'm brand new at this, I'd even have to first ask how you actually update the firmware.  I have asked the supplier but no answer yet. I won't be surprised if they don't answer at all, but let's see.

2 hours ago, Coulomb said:

Ah. So is this fixed (for Kings at least) in firmware version 72.00 or later?

Oh yes its fixed, it was sorted after 71.94 for me. (That is for the 5x 5kw Kings with the low voltage mppt, between me and my friends)

If I recall correctly it was the 71.92 firmware my inverters came with that had that solar freeze

9 hours ago, PhillipMarx said:

Oh yes its fixed, it was sorted after 71.94 for me.

The difference seems to be in a small function that checks whether the Solar Charge Controller (SCC) should be enabled. In 71.93 and at least 71.92, there were various BMS checks, with the faulty logic "oh, the battery is full and the BMS has disabled charging, therefore disable the SCC". Of course, the SCC is also there to power loads! A dip or freeze would result when the battery filled. If the battery discharged enough (probably to under 95% SOC), then the SCC would presumably be enabled again. Hence the intermittent nature of the bug. The  fix in 71.94 was simply to remove those particular BMS checks.

Sadly, this only seems to apply to inverters with a 145 V max PV and a removable display. The Axpert King 1 is the only machine I know of in that category (ignoring for now some Infinisolar V models). So as far as I can tell, this fix can't be ported to other firmwares.

Updated my Axpert King to 71.94 last night, hoping the freeze would disappear. Sadly, today at 13h45 it reappeared for no apparent reason!!!   😞

I REALLY do not know what else to do with this irritating issue

 

1 hour ago, KobusC said:

Sadly, today at 13h45 it reappeared for no apparent reason!!!

Presumably, because your battery was then full. Of course, that's not a good reason to stop PV production!

1 hour ago, KobusC said:

Updated my Axpert King to 71.94

So you've verified that the main U1 firmware version is now 71.94?

That graph looks a bit like mine today. Where are you?  For me I believe it was the cloud cover moving in

13 hours ago, derek049 said:

That graph looks a bit like mine today. Where are you?  For me I believe it was the cloud cover moving in

i am at Kranspoort, Mpumalanga. No cloud cover for the day  😞

I did verify that the firmware is now 71.94

19 hours ago, Coulomb said:

Presumably, because your battery was then full. Of course, that's not a good reason to stop PV production!

So you've verified that the main U1 firmware version is now 71.94?

Verified. Will flash to 72.00 tonight.....   😞

Hi Kobus

Very strange your 5kw King keeps on doing it.

Mine stopped doing it after 71.94.

 

Does your 5kw King have the High or low voltage charger controller?

On 2023/03/10 at 7:53 PM, PhillipMarx said:

Oh yes its fixed, it was sorted after 71.94 for me. (That is for the 5x 5kw Kings with the low voltage mppt, between me and my friends)

If I recall correctly it was the 71.92 firmware my inverters came with that had that solar freeze

Phillip

Assume the low voltage, max volt is 145v.

Can you please sent me your settings on Bulk Charging, Float charging, back to Charge, Back to Discharge and Bat cut-off voltage. Maybe it is something there that is not correct

Yes yours is low voltage.

Just remember it is 145Voc, but 115V max under load. How is your panels configured? What is your Mppt volts operating at?

I have 2x 5kw King (Low voltage) inverters running Parralel

Here are screenshots below:

18 hours ago, PhillipMarx said:

Yes yours is low voltage.

Just remember it is 145Voc, but 115V max under load. How is your panels configured? What is your Mppt volts operating at?

I have 2x 5kw King (Low voltage) inverters running Parralel

Here are screenshots below:

Thanks for all the settings info Phillip.

The old ICC still rocks over SMH !!

I did update to ver 72 last night.

My 12x340w panels are set up in clusters of 3. My voltage does frequently go to above 115v and up to 120v, even under low load as per attached screenshot just taken.

 

 

KobusC in my opinion, I will recommend to change your PV configuration to have lower PV Voltage. Running your Inverter's charger outside its parameters can cause damage.

This could be the reason for your inverter to have "solar freezes".

Does your SMH track the tempature of the inverter?

What is your tempature at the point of the "solar freeze"?

 

Below is the MPPT range of the 5kw King with low voltage MPPT.

5 hours ago, PhillipMarx said:

 

KobusC in my opinion, I will recommend to change your PV configuration to have lower PV Voltage. Running your Inverter's charger outside its parameters can cause damage.

This could be the reason for your inverter to have "solar freezes".

Does your SMH track the tempature of the inverter?

What is your tempature at the point of the "solar freeze"?

 

Below is the MPPT range of the 5kw King with low voltage MPPT.

Unfortunately SMH does not show my inverter temp. Nor do they show the PV Volts. I did ask them how to get it on the graph but their super intelligent support reply was that the PV Volts is the green section!!!

I have contacted Manie to revert back to ICC, as there I remember I could add the voltage, temp or any parameter to the graphs, which does not seem to be the case in SMH.

However, after changing my battery float, bulk charge etc voltages to the same as your setup 3 days ago I have not had one freeze yet. As you can see from the graph below (yesterday) it is quite stable. At this stage I am more than happy to keep it as it is until the problem surface again. It does however beg the question if the freeze is actually firmware related or setting related..................

Thanks for the help and info !!!

 

51 minutes ago, KobusC said:

Unfortunately SMH does not show my inverter temp. Nor do they show the PV Volts. I did ask them how to get it on the graph but their super intelligent support reply was that the PV Volts is the green section!!!

I have contacted Manie to revert back to ICC, as there I remember I could add the voltage, temp or any parameter to the graphs, which does not seem to be the case in SMH.

However, after changing my battery float, bulk charge etc voltages to the same as your setup 3 days ago I have not had one freeze yet. As you can see from the graph below (yesterday) it is quite stable. At this stage I am more than happy to keep it as it is until the problem surface again. It does however beg the question if the freeze is actually firmware related or setting related..................

Thanks for the help and info !!!

 

Dis n Plesier!

Just keep an eye on those Voltage and Tempature.

hi,  10 x 455W halfcell mono panels east facing, 5.0KVA synapse inverter and a fivestar 15kva lithium battery. I have read through a lot, thanks guys, I recently threw out my 24 No 12V100ah lead acids (3years old and still good) and put in a 48V300ah lifepo4 battery, I never had any PV issues. In goes lithium after a few days starts dropping the PV current in the afternoon. After a lot of head scratching I changed the bulk charging to lower than the float voltage 0.5V, now my PV stays on and feeds the loads until the sun goes down even with the loads being greater than the PV. It justs tops up from the batteries. My main concern is the battery cannot communicate with the inverter. I have tried can and RJ458 configuration, get err61. I have both battery and inverter pinouts.

 

 

Hi All, I discovered, with my inverter at least, that you can reset the problem of the inverter shutting down the solar power input (for no good reason) by switching off the mains to the inverter for about 20 seconds, then back on again (simulate short load shedding). Then it starts accepting input from the panels again

Morning all

Does anyone have firmware 72.02 available for the Axpert King 5Kw?

I need the dsp.hex file

 

Edited April 21, 20233 yr by KobusC

On 2023/04/21 at 5:43 PM, KobusC said:

Does anyone have firmware 72.02 available for the Axpert King 5Kw?

I have firmware version 73.02 for the Axpert King 5 kW. I believe it was posted on this forum. But I think it may be older than 72.00.

Edit: Yes, it's considerably older than 72.00.

Edited June 24, 20241 yr by Coulomb

I have purchased a new Axpert, but the firmware on it is apparently 72.02.

Can I downgrade it to the same ver 72.00 that I upgraded my current king to on 16/03/2023?

I want to parallel the 2 and need the verslons to be the same.

Would anyone know if there was major changes from 72.00 to 72.02?

40 minutes ago, KobusC said:

Would anyone know if there was major changes from 72.00 to 72.02?

I've not seen a firmware update file for 72.02, so I don't know what's in it. I would be very surprised if there were major changes in it. The Axpert King 1 is now a fairly mature product.

I also don't expect you to have the slightest problems paralleling 72.00 and 72.02. The firmwares don't have to be identical, they just have to interpret certain data the same.

You certainly could downgrade your new King to be the same software as the old King. That would certainly remove all doubt about whether the firmwares are totally compatible or not. But I don't see the need.

Thanks Coulomb!!