34 minutes ago, Septain21 said:

Hello

For my case, the inverter connected to utility in battery power consumes 50W/h to operate when the panels no longer provide the charge.

I had to install an automatic circuit breaker that turns off the power supply to the inverter when the batteries reach 52v and engages it at 50v.

you can use the dry contact of the inverter and a contactor. it will do it automatically

45 minutes ago, Septain21 said:

Hello

For my case, the inverter connected to utility in battery power consumes 50W/h to operate when the panels no longer provide the charge.

I had to install an automatic circuit breaker that turns off the power supply to the inverter when the batteries reach 52v and engages it at 50v.

I put a 100W consumer (Halogen bulb) on the grid when the sun is shining with a day/night relay

FW 272.66 + Help board supply solar connector remove.

Its fine perfect work. Last test day cloudy weather ⛅

 

 

(14:30) Modification day cloud and rain today:

 

 

No modification sunny day yesterdsay:

Edited November 3, 20232 yr by Tomeek

I have such an inverter. Will these updates match mine?

13 hours ago, Darek said:

Will these updates match mine?

Probably. Unfortunately, the ratings sticker doesn't tell us enough information: DSP chipset, twin or not, E or II. Without this information, we can't say which variant of patched firmware is right for your model.

What is your main (U1) firmware version?

On 2023/11/03 at 12:39 PM, Coulomb said:

My understanding, from when I last looked into this, is that feeding to the grid should only happen in SUB mode, not USB mode. Though maybe it's only SBU mode where you can't get grid feed-in.

You may be stuck with having to use SBU output source priority. As you can see, the feed into the grid is fairly small (about 200 W max most of the time), and the higher power feed-in is only for a short period of time as the control system adapts to a sudden increase in available solar power. It seems to be a limitation of the fairly poor control systems that Voltronic use. I suspect that Voltronic considers the amount of energy pushed back into the grid to be negligible. Unfortunately, your utility doesn't seem to agree.

It's unfortunate, of course, as you'll use more battery energy with SBU.

Is it not possible to modify 272.66 so that the grid power does not go below about 50W? (SUB/USB)
5kW white/blue PowMr works similarly

Edited November 7, 20232 yr by Tomeek

U1 72 07 . U2 12 21. 

Can I install it on my inverter?

Edited November 7, 20232 yr by Darek

11 hours ago, Tomeek said:

Is it not possible to modify 272.66 so that the grid power does not go below about 50W? (SUB/USB)

Perhaps one day. The code that controls the blending of power is too complex for me to understand at present.

Sorry.

11 hours ago, Darek said:

U1 72 07 . U2 12 21. 

Can I install it on my inverter?

You can install any of the patched firmware that is for the Axpert E 8 kW and the '28066 processor; at present, that's 92.06, 292.04, 392.04, and 272.66.

272.66 is based on the most recent factory firmware, but it only changes the two current compare statements. Present "best practice" seems to be to make a few more changes. So you may be better off with 92.06, unless you have a particularly high PV voltage, where 392.04 may be better (300 V minimum MPPT).

Just search for the appropriate numbers in this forum. I suggest that you start with 272.66.

good morning @Coulomb, i see that you're a guru for this can u help me or have any idea if is possibile to solve

 i've got 1 x Axpert Max 7.2 kW with U1 45.13 (sell at 45.06) and U2 12.21.

I've got a big problem that i don't know how to solve; i hope someone can help me.

i set manually the hour and the time but the inverter don't stay with the correct time.

For example if i set 16:00 after 1 hour inverter can say that the time is 16:60, at 17:00 can say that are 17:05. I dont know because use random minutes and it's unstable. I've got this problem with firmware 45.06, hope that update can solve it but nothing.

It's a big problem for me because i need to change at 23:00 my setting of the inverter because i have night fare free from 23:00 to 7:00 and i use for charge my battery. But with the inverter that change time randomly is impossible to me use it manually every day. Thank you

For Axpert Max 8 kw cu firmwareU1 46.05 ,U2 112.14 it’s posible new firmware?

5 hours ago, floorian said:

Pentru Axpert Max 8 kw cu firmwareU1 46.05 ,U2 112.14 este posibil firmware nou?( problem90v)

Procesor TMS 320F 2809

Edited November 8, 20232 yr by floorian

5 hours ago, niki100 said:

inverter can say that the time is 16:60

Does it literally show 16:60? Usually that would be shown as 17:00.

5 hours ago, niki100 said:

the inverter don't stay with the correct time.

That implies to me that either the crystal is defective (so the processor's ~100 MHz clock speed is way off and variable), or the firmware is written in such a way that the task that keeps track of time doesn't always get to run when needed. The former is a simple hardware fault, but the latter is a thorny software issue. Maybe they could just turn on optimisation. For whatever reason, the '2809 firmwares never seem to use optimisation; the '28066 firmwares always seem to.

I guess one workaround might be to somehow obtain a compatible '28066 control board. Maybe I could take a '28066 firmware and just take out the calibration call, but I'm not certain that it's as easy as that. I attempted something like that once, but I don't recall getting feedback on how well it worked.

So: nothing obvious and easy (that I know of) I'm afraid.

5 hours ago, floorian said:

U1 46.05 ,U2 112.14 it’s possible new firmware?

Main (U1) firmware version 46.71 is available; see this post.

I believe that display firmware version 12.21 can be run on either type of display chipset (the ST or GigaDevice chips). Available here.

thank you coulomb i mean 16 50 not 60 my error.

yes i think too it is a big problem.

thank tou

On 2023/11/09 at 3:08 AM, niki100 said:

i mean 16 50 not 60 my error.

Ah. So it's sometimes running slow, sometimes fast. I would expect if it's just the timing task not getting cycles because the firmware is too busy doing other things, then it would always run slow, never fast.

So it's starting to sound more like a hardware fault, with the CPU's high frequency clock unstable. Perhaps see if components near the DSP's crystal on the control board are sensitive to heat and cold.

Edit: I believe that this was fixed with a firmware update.

Edited December 8, 20232 yr by Coulomb

On 2023/11/02 at 8:50 PM, Tomeek said:

SUB and USB mode
Unfortunately, feeding into the grid

Funny answer from Easun:

 

I'm sorry for the trouble caused. This is the first time we have heard your feedback about the off grid inverter having this function. Perhaps there is a weak current. It is recommended to install a current limiter to prevent backflow from the mains input to avoid it. At the same time, I have forwarded this email to our engineer for analysis of the cause. thanks

 

Edited December 8, 20232 yr by Tomeek

On 2022/10/12 at 5:03 PM, Georg594 said:

First Release for Axpert max 8KW  (with removable Display )

(Based on stable 90.06).

This Firmware is testet on original Axpert max 8KW from Solarpower24 and works great.

If you have a clone be careful (Error F90 is active in this release)

 

 

MPPT minimum Voltage is now 200V (if someone need this limit lower >>> let me know)

(if someone need individual MPPT minimum Limits for PV1 or PV2 inputs eg. 150V &250V  >>>let me know)

 

Hi Georg, I thank you for your commitment made available to our community, I am testing your firmware 90.09 limit at 175V because my system has 2 strings of 6 panels each of 410W - 31.3 Vmp and 37.4 Voc. In your opinion, is this limit OK or should I go down to 150V? I attach the tension graph of my 2 strings. Thank you for your answer.

With zero practical experience, my guess is that you need to go down to the 150V patch, possibly even 120V. If the firmware demands 175V minimum PV voltage and your panels happen to be at 174V, you will get zero production. I see plenty of times when one of your strings is below 175V.

Thanks Coulomb for your reply.  Is it possible to have a 150v version of the firmware 90.06 that I can test?

19 hours ago, LIviano said:

Is it possible to have a 150v version of the firmware 90.06 that I can test?

It's possible, but there aren't any at present.

Have you tried the 175 V or the 100 V versions?

3 hours ago, Coulomb said:

It's possible, but there aren't any at present.

Have you tried the 175 V or the 100 V versions?

I'm testing the 175 volt version.  But I noticed that he works to the limit. I thought a 150x version might be fine, but I'll try the 100V version anyway, thanks.

2 hours ago, LIviano said:

But I noticed that he works to the limit.

Can you elaborate, please?

I noticed that one of the two strings works at the voltage limit of 175V as you had also predicted, and therefore loses a bit of power. I will compare it with the limit set at 100V to see if it works better.