SILA IV 6000MHT (TWIN)

[xamillion]

Hello everyone!

I use SILA IV 6000MHT (TWIN) inverter (https://e-solarpower.ru/solar/inverter/hybrid-inv/gibridnyy-solnechnyy-invertor-sila-iv-6000mht-twin/).

It looks similar to Axpert VM 4 TWIN 4KVA/6KVA (https://voltronicpower.com/en-US/Product/Detail/-Axpert-VM-4-TWIN-4KVA-6KVA).

From the factory, it came with the firmware:
Main Board MCU Ver. 56.09
Remote Panel Ver. 39.06

Then I updated the inverter with the following firmware from the seller:
Main Board MCU Ver. 60.07  
Remote Panel Ver. 39.17

I searched through the forum and found that there is firmware with intelligent fan control.
Could anyone advise what firmware should I use to be on the safe side (Main Board MCU and Remote Panel)?

Another question is regarding WatchPower app. For some reason inverter stopped sending data to the app installed on smartphone (it shows gray icon instead of green). Although WatchPower software installed on the PC and directly connected to the inverter with the cable works properly.
Is there any way to restart the inverter module without powering down the whole inverter?
 

[TaliaB]

56 minutes ago, xamillion said:

Another question is regarding WatchPower app. For some reason inverter stopped sending data to the app installed on smartphone (it shows gray icon instead of green). Although WatchPower software installed on the PC and directly connected to the inverter with the cable works properly.
Is there any way to restart the inverter module without powering down the whole inverter?

Maybe this would help concerning the Watchpower App.

https://diysolarforum.com/threads/mpp-watchpower-wifi-app-issue-solved.26436/

[Coulomb]

12 hours ago, xamillion said:

From the factory, it came with the firmware:
Main Board MCU Ver. 56.09
Remote Panel Ver. 39.06

Then I updated the inverter with the following firmware from the seller:
Main Board MCU Ver. 60.07  
Remote Panel Ver. 39.17

I still don't know the difference, if any, between 56.xx and 60.xx firmwares.

60.95 is the latest of the 60.xx that I'm aware of, and it's supposed to have the good fan control. Though I don't notice much difference between the fan logic for 60.06 and 60.95, at least without investigating in depth. I did see some differences here and there.

The latest VM IV display firmware is 39.26.

[xamillion]

On 2024/08/11 at 10:19 PM, TaliaB said:

Maybe this would help concerning the Watchpower App.

https://diysolarforum.com/threads/mpp-watchpower-wifi-app-issue-solved.26436/

Hi, thank you for your help. I see that the Wi-Fi Module successfully connected to Wi-Fi but I guess the problem is between Inveter and the Wi-Fi Module. Even the Wi-Fi icon is not visible on the invertor's display.

 

[xamillion]

On 2024/08/12 at 9:59 AM, Coulomb said:

I still don't know the difference, if any, between 56.xx and 60.xx firmwares.

60.95 is the latest of the 60.xx that I'm aware of, and it's supposed to have the good fan control. Though I don't notice much difference between the fan logic for 60.06 and 60.95, at least without investigating in depth. I did see some differences here and there.

The latest VM IV display firmware is 39.26.

Hi, thank you for your help. I will try to update the following way:
Main Board MCU Ver. 60.07  -> 60.95
Remote Panel Ver. 39.17 -> 39.26

[Coulomb]

23 hours ago, xamillion said:

I will try to update the following way:
Main Board MCU Ver. 60.07  -> 60.95

60.95 is from mid January 2024; I don't know what date 60.07 has. If the machine's sticker is February 2024 or later, 60.95 is probably not a later firmware. Sorry for not pointing that out earlier.

BTW, "MCU" usually refers to the display firmware, not the main (DSP) firmware.

Edited August 20 by Coulomb

[xamillion]

On 2024/08/20 at 10:07 AM, Coulomb said:

60.95 is from mid January 2024; I don't know what date 60.07 has. If the machine's sticker is February 2024 or later, 60.95 is probably not a later firmware. Sorry for not pointing that out earlier.

BTW, "MCU" usually refers to the display firmware, not the main (DSP) firmware.

I set the value of parameter 60 - Low DC cut off voltage or SOC percentage on second output (L2) to 45 volts, so that the second output would be switched off when the voltage drops below this value. However, this does not happen - the second output remains on even when the battery voltage drops below 45 volts. Any idea why this is so?

Current firmware versions:
Main Board MCU Ver. - 60.07
Remote Panel Ver. - 39.17

Edited August 25 by xamillion

[Coulomb]

14 hours ago, xamillion said:

the second output remains on even when the battery voltage drops below 45 volts. Any idea why this is so?

The code associated with this functionality is quite complex. I've checked what I believe is the relevant display firmware versions 39.17 and 39.26, and I see no significant differences. Likewise, I see no differences between main firmware version 60.06 (the closest I have to 60.07) and 60.87 (the latest 60.xx firmware that I have, later than 60.95), and again find no significant differences. So it doesn't look like a firmware update will solve it, unless there is a difference in code that I haven't looked at yet.

There tests for the second output's cutoff voltage command's parameter, and against the CV voltage setting, the main low DC cutoff voltage. Presumably it should not be higher than the CV  voltage setting, and should not be lower than the main battery cut-off setting. 45 V is quite a low voltage, even for a 15S LFP battery.

Edited August 26 by Coulomb