1 hour ago, esmail-kassir said:

Could you attach the version you tested?

I attached the file. This file is from this thread, date june,13.

 

1 hour ago, esmail-kassir said:

How did you manage to obtain the temperature values?

My node-red program sends cyclic the "QPIGS" command to the inverter, and the answer contains also the heat sink temperature.

 

If the fans run faster under load, the temperature drops, and start to rising under heavy load but reaches never 50°C.

I don't log the temperature but i will tomorrow use 2000 W for some time out of my batterys to show you the graph from the node red -UI.

 

 

VM TWIN_Ver60.95.7z

2 hours ago, esmail-kassir said:

I saw this behavior in all versions I have tested. I’m not sure if there’s a firmware version that behaves differently. That’s why people tend to use the programmed timed charging source priority feature

I've never experienced this with any previous firmware, they all charge from both solar and grid together when program 16 is set to SNU and program 1 to USB. I used to use the schedule of charging source priority for day and night, but with 60.10 it always behaved as "solar first".

The user manual explains the charging options, but it is different from what I'm facing in fact.

Edited November 10, 20241 yr by AMalakani

20 minutes ago, pintopf said:

My node-red program sends cyclic the "QPIGS" command to the inverter, and the answer contains also the heat sink temperature.

Could yoy provide me with the command in hex with crc because I get NAKD every time i try it 

1 hour ago, esmail-kassir said:

Could yoy provide me with the command in hex with crc because I get NAKD every time i try it 

Here is it :

 

\x51\x50\x49\x47\x53\xB7\xA9\x0D

 

 

On 2024/11/06 at 7:58 PM, Jamil Tulimat said:

1- The only thing similar to this that i noticed is when i put the inverter mode on UPS it repeatedly draws about 1Amps AC on and off and on the battery end at the same time it cycles between drawing 1.5A at 25v which is the normal no-load draw to 0.4A and then again to 1.5 and so on.... 

I changed it back to APL and it stopped doing those weird draw patterns.

 

2- A question for fellow 4kw VM-III owners : Do you guys notice  flickering on neon or incandescent lamps 

because some times the flickering becomes noticeable to an annoying level !

and by the way i tried with no-load , high-load and it's the same.

 

Ad.1 I use APL too because keeps 0A charging battery from grid at bypass in SBU and "Solar only".

At UPS it is drawing  2.7A from grid(135W). It's stable 2.7A not cycled. It is 6kW model.

Inverter LCD panel do not show charging battery but BMS and clamp meter yes.

More... inverters grid usage do not measure it so it is big gap between load+battery charging and grid usage if inverter is in bypass at UPS+SBU+Solaronly combo.

Ad2 Yes but is very little noticable for me (noticed it after 2 month of use inverter) so do not bother me at all .I think is noticable more at low SoC of battery.

Edited November 10, 20241 yr by bratpit

Regarding the voltage readings of my axpert vm III 4k twin compared to a multimeter 

I've took multiple readings at different times and scenarios

SC 1. Ac: on batt: full chg current: 0 inv: 27.6 multimeter: 27.7 

SC 2. Ac: on batt: chg in float current: 4a in 27.5 multimitere 27.7

SC 3. Ac: off batt: inv 24.7 multimeter 24.8 load: 176 va

SC 5. Ac: off batt: inv 24.0/24.1 multimeter 24.1 load: 132 va

SC 6. Ac: off batt: inv 24.5 multimeter 24.5 load: 250 va

SC 7. Ac: on batt chg bulk current: 32a inv: 28.8 multimeter: 28.9

So it's not a constant difference. It ranges between 0 and -0.2 v from the multimeter. 

Also, I noticed today that when having 2.5 kva load 1.5 kva of them going to a cooker. When turning the cooker off. The voltage shoots from 28.8 to 29.5 for a second or 2 then goes back to normal

Is this behavior normal? This is the first time I notice this so I'm not sure if it happened before or if it's new. I have tubular lead acid batteries. I don't think it matters with/harms lead acid batteries. But what about gel lead acid batteries or lithium batteries? 

On 11/11/2024 at 1:10 AM, bratpit said:

Ad.1 I use APL too because keeps 0A charging battery from grid at bypass in SBU and "Solar only".

At UPS it is drawing  2.7A from grid(135W). It's stable 2.7A not cycled. It is 6kW model.

Inverter LCD panel do not show charging battery but BMS and clamp meter yes.

I found another thing today 

that after changing full the battery, even when grid is available, the inverter consume a little bit from the battery. In UPS mode it fluctuates from 0 to 2 amp , in APL it is continuous 2 amp from battery till it is 99% then it changes again 

@Coulomb

On 11/11/2024 at 5:51 PM, Eddie1 said:

Is this behavior normal? This is the first time I notice this so I'm not sure if it happened before or if it's new. I have tubular lead acid batteries. I don't think it matters with/harms lead acid batteries. But what about gel lead acid batteries or lithium batteries? 

Hi,

I think it is normal. My thinking is that when you turn off the 1.5 kVA consumption there is some residual unconsumed energy that is returned to the grid, and if it has nowhere to go it is sent to the only possible place which is the batteries. And for that reason the voltage goes up for a second or two. If this is the reason, you should notice the voltage going up every time you turn off the cooker, even if there is not another 1000 VA (of 2.5 kVA) extra.

If you only notice it when there is extra power, it could be a simple momentary voltage adjustment, just like the voltage goes down when the battery is discharged depending on its state of charge, returns for a second or two to its resting voltage (higher) and then adjusts back to the discharge voltage (lower) for the remaining consumption.

I don't know if there could be another reason, and it is just a consideration of what seems normal to me. I could be wrong, but consider it in case it seems like a feasible reason.

 

Edited November 13, 20241 yr by monsam

4 hours ago, esmail-kassir said:

that after changing full the battery, even when grid is available, the inverter consume a little bit from the battery. In UPS mode it fluctuates from 0 to 2 amp , in APL it is continuous 2 amp from battery till it is 99% then it changes again

I have noticed this behaviour when observing through the Watchpower app that when the battery charge status reaches 100% the panels lower their production a bit, and the app shows that the battery is discharging, although imperceptibly, as it shows 0W. When the charge status reaches 99%, the app shows that the battery is charging, but also imperceptibly, showing a charge of 0W. And it maintains this behaviour constantly when the battery reaches 100% charge. What you say would fit with what I observe in the Watchpower app.

Edited November 13, 20241 yr by monsam

On 2024/11/10 at 6:23 PM, esmail-kassir said:

Could you test the temperature under load and provide us with a graph over the day?

See the attachement. The graph shows an 1 hour intervall. Firmware: 60.95

21 minutes ago, pintopf said:

See the attachement. The graph shows an 1 hour intervall. Firmware: 60.95

Interesting graphs! I wish I had managed to apply the command correctly during the summer so I could compare the temperature under load between the two firmware versions. This would help me determine if there’s any potential harm from using the lower fan logic. I tried to do this during the summer, but it seems I used a 1-byte CRC when I should have used a 2-byte one. You helped me figure this out—thanks!

 

5 hours ago, monsam said:

I have noticed this behaviour

I don’t feel it is normal to discharge form the battery then stop then do it again when grid is available, and still don’t understand why the inverter consume from the battery when solar is available. 
maybe @Coulomb knows about this 

My inverter sends energy back to the grid, if the batterys are full charged or the charging current is over the maximum. ( if "Solar Feed To Grid" is enabled.)

Interestingly i don't see it at the inverter-display or the app. I see it only at my shelly.

Edited November 13, 20241 yr by pintopf

55 minutes ago, pintopf said:

My inverter sends energy back to the grid, if the batterys are full charged or the charging current is over the maximum. ( if "Solar Feed To Grid" is enabled.)

Interestigly i don't see it at the inverter-display or the app. I see it only at my shelly.

I have this option here 

but I haven’t enabled it ever 

and I am not sure this option should be available as my inverter us VM III and it shouldn’t able to feedback to grid 

I have an AXPERT VM VI 4KW inverter with the following versions
U1: 72.00
U2: 19.16
Can I update it to the following versions
U1: 60.95
U2: 25.12

On 2024/11/17 at 6:33 AM, ahmad almawal said:

I have an AXPERT VM VI 4KW inverter

Are you sure it's a VM VI (six! I've not seen even V (five) yet!)

It seems more like a new style VM III. Or maybe an MKS IV (not the same as a VM IV), which has twice the flash space, and is parallelable.

Unfortunately, the 72.xx numbering is the most conflicted of all.

Please post photos, or manufacturer or reseller's link, or tell us what type of display is has, and how many buttons, and if touch or ordinary buttons.

So far, those firmwares don't look remotely compatible.

Edited November 18, 20241 yr by Coulomb

On 11/13/2024 at 1:10 PM, esmail-kassir said:

I don’t feel it is normal to discharge form the battery then stop then do it again when grid is available, and still don’t understand why the inverter consume from the battery when solar is available. 
maybe @Coulomb knows about this 

@Coulomb we still need you to check the last 7 or 8 posts up there when you get to have time please 

I am sure you have an explanation regarding those issues ❤️ 

19 hours ago, esmail-kassir said:

we still need you to check the last 7 or 8 posts up there when you get to have time please 

I am sure you have an explanation regarding those issues

Sorry, the "policy" parts of the firmware are still opaque to me. I've had a few goes at it on the Axpert King in particular, but can't seem to make a breakthrough.

Certainly when the battery is full and goes to float, it's normal for the battery to discharge slightly (about 0.5% SoC with an LFP battery). But there seems to be much more going on here.

23 hours ago, Coulomb said:

Are you sure it's a VM VI (six! I've not seen even V (five) yet!)

It seems more like a new style VM III. Or maybe an MKS IV (not the same as a VM IV), which has twice the flash space, and is parallelable.

Unfortunately, the 72.xx numbering is the most conflicted of all.

Please post photos, or manufacturer or reseller's link, or tell us what type of display is has, and how many buttons, and if touch or ordinary buttons.

So far, those firmwares don't look remotely compatible.

هذه صورة للعاكس والشاشة.

Hmmm. That QR code seems to decode to "You successfully scan QR code".

The label doesn't look quite right. The first 4 digits of the serial number (9632) aren't a pattern that I've seen, but I haven't been seeking them out lately.

I get the feeling that this is a clone, and the firmware is a copy of some unknown Voltronic firmware.

It's obviously not a copy of a VM IV (no round display), and the display is at the very left like a VM III, and the MPPT range is 60-450 V like a VM III. So my guess is that it's a VM III clone. Probably a non-twin, since I'd expect a Twin model to say so on the label (but that's just what I'd expect, not definite at all). Also, 19.xx is a Voltronic non-Twin display firmware for the new style VM IIIs. But you can tell if it has two AC output terminals; if so, it's a Twin, if not, it's a non-Twin.

Since the VM models all use the same processor chip ('28062), it's possible that this inverter is compatible with Voltronic 55.xx firmware. The only one of these in my collection us 55.06, and it's from October 2022. I see from your serial number that your inverter is from early 2023, so whatever that 72.00 firmware is, it's probably more recent than that.

You could possibly update to Voltronic display firmware version 19.18, but there doesn't seem much point, and plenty of risk.

7 hours ago, Coulomb said:

Hmmm. That QR code seems to decode to "You successfully scan QR code".

The label doesn't look quite right. The first 4 digits of the serial number (9632) aren't a pattern that I've seen, but I haven't been seeking them out lately.

I get the feeling that this is a clone, and the firmware is a copy of some unknown Voltronic firmware.

It's obviously not a copy of a VM IV (no round display), and the display is at the very left like a VM III, and the MPPT range is 60-450 V like a VM III. So my guess is that it's a VM III clone. Probably a non-twin, since I'd expect a Twin model to say so on the label (but that's just what I'd expect, not definite at all). Also, 19.xx is a Voltronic non-Twin display firmware for the new style VM IIIs. But you can tell if it has two AC output terminals; if so, it's a Twin, if not, it's a non-Twin.

Since the VM models all use the same processor chip ('28062), it's possible that this inverter is compatible with Voltronic 55.xx firmware. The only one of these in my collection us 55.06, and it's from October 2022. I see from your serial number that your inverter is from early 2023, so whatever that 72.00 firmware is, it's probably more recent than that.

You could possibly update to Voltronic display firmware version 19.18, but there doesn't seem much point, and plenty of risk.

Thank you very much for this information

On 2024/11/19 at 10:28 PM, ahmad almawal said:

Thank you very much for this informatio

 

On 2024/11/19 at 2:41 PM, Coulomb said:

Hmmm. That QR code seems to decode to "You successfully scan QR code".

The label doesn't look quite right. The first 4 digits of the serial number (9632) aren't a pattern that I've seen, but I haven't been seeking them out lately.

I get the feeling that this is a clone, and the firmware is a copy of some unknown Voltronic firmware.

It's obviously not a copy of a VM IV (no round display), and the display is at the very left like a VM III, and the MPPT range is 60-450 V like a VM III. So my guess is that it's a VM III clone. Probably a non-twin, since I'd expect a Twin model to say so on the label (but that's just what I'd expect, not definite at all). Also, 19.xx is a Voltronic non-Twin display firmware for the new style VM IIIs. But you can tell if it has two AC output terminals; if so, it's a Twin, if not, it's a non-Twin.

Since the VM models all use the same processor chip ('28062), it's possible that this inverter is compatible with Voltronic 55.xx firmware. The only one of these in my collection us 55.06, and it's from October 2022. I see from your serial number that your inverter is from early 2023, so whatever that 72.00 firmware is, it's probably more recent than that.

You could possibly update to Voltronic display firmware version 19.18, but there doesn't seem much point, and plenty of risk.

Is there firmware 19.18?

Dears

@Coulomb @AMalakani @Tarek Yag

 

my inverter (axpert vm iii 4kw) 

When connected to electricity, it keeps disconnecting and connecting the panels and electricity all the time. 

i have 4 panel 

electricity volt 220 and 49 hz 

Main v 60.89

second v 25.12

Edited November 22, 20241 yr by mhd_murad

What software is there for this inverter?