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InfiniSolar-15KW 3P - Not Exporting Power - Not charging from AC


Ziad Boustany

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I have an installation with 3 InfiniSolar-15KW 3P inverters working in parallel with 20 Dyness A48100 lithium batteries. BMS connected and operational. configuration is Grid-Tie with back-up (I). With no AC power, the system is working perfectly. All inverters have the same parameters. When AC power becomes available, I faced the following 2 problems:

1- One of the inverters will not charge when AC is available. Batteries SoC well below 70%. Other 2 inverters are charging normally and reaching the "Max. AC charging current".

2- The same inverter refuses to export power back to the grid when it's available and batteries are full with plenty of Sun.

I have observed the same behavior in another site with only two inverters.

Did anyone experience this problem? I appreciate any insights you might have on the topic. So far, Voltronic technical support are stuck on the basics whereas I think there is a much more serious problem having to do with the firmware itself.

Edited by Ziad Boustany
typo correction
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  • Ziad Boustany changed the title to InfiniSolar-15KW 3P - Not Exporting Power - Not charging from AC

So the inverter in question is actually supporting the load? In other words, pretty close to ⅓ of the load at high loads, and very roughly ⅓ of the load at low loads?

I'm just wanting to eliminate something simple like the "power" switch being off, yet the inverter's display is on because there is a charge source.

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Yes, the inverters are supporting the load. We are running on the inverters 18 to 20 hours a day. Total load varies between 10 to 27Kw. Utility power is hardly available. The attached image shows the history of the last 24 hours. Blue graph is for Utility (EDL in Lebanon). As this installation is feeding a residential building, the utility feeds directly the load (not through the inverters as they are bypassed) and the load we see from the utility is exclusively for charging the batteries. The red graph is when the generator is running. The generator feeds the load directly (inverters are bypassed like when utility is present). The charging power is the difference between the Generator Power and the Consumption power. It is clear is both cases that the batteries are only charging around 3 to 5Kw whereas they should be charging around 25Kw.

ps: the image comes from a monitoring software linked to a dedicated genset controller connected to the internet that monitors all three inverters using a serial port. You can see live data on the following link: http://www.sascontrollers.com:3000/cond05

 

image.png

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I would like to add that when we first ran the installation (back in Feb), one inverter was not charging at all from AC power (Utility or generator). The other 2 were charging 170 amps each as per the AC max charging current setting. Out of the blue and some two weeks ago and without changing any inverter parameter, a second inverter stopped charging and the third was charging around 100 amps only which is well below the AC max charging current and the Max charging current setting coming from the BMS which is around 180 amps. I am totally lost here!

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  • 3 weeks later...
  • 3 months later...
On 2023/06/29 at 10:06 AM, Ziad Boustany said:

I would like to add that when we first ran the installation (back in Feb), one inverter was not charging at all from AC power (Utility or generator). The other 2 were charging 170 amps each as per the AC max charging current setting. Out of the blue and some two weeks ago and without changing any inverter parameter, a second inverter stopped charging and the third was charging around 100 amps only which is well below the AC max charging current and the Max charging current setting coming from the BMS which is around 180 amps. I am totally lost here!

Hi. Did you get this resolved?

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Where are you based Craig? Not sure if we in proximity but between myself and a colleague we know the Infinii machine well. It's unfortunately a laptop operated & setup machine using Solar Power software. 

Need to know if it's a Fault of a warning ⚠️...but here is the list to decode either. 

Its a very misunderstood machine full of tricks. In certain modes it won't AC passthrough if you exceed the  15kW limit and it cannot run unbalanced by more than 5kW per phase. All depends on the Mode. Something they call the Grid relay controls the AC passthrough function & it's available in some modes but not all & they have so many dam modes. To my memory Grid tie with Backup 2 is the best mode, it just works. 

Another stupid setting depending on your Grid frequency & Voltage is to setup as a wide AC input will basically allow even Generator power to charge the batteries & it's advisable to tick this box & it will then remedy the lost grid charging. The Issue is also the solar power software is not user-friendly & buggy. So unfortunately this inverter is more in the Prehistoric IT domain than a modern plug and play type of machine. In the right hands it can however, perform well. A massive thing to remember: doesn't matter which mode: When no grid it's limited to 5kW per phase. So you pull 6kW on a single phase with the other phases on zero she will go into Warning 11 overload. You will scratch your head for days trying to understand why a 15kW inverter has tripped at 5kW until you know she can only carry 5 each per phase. 

Screenshot_2023-11-16-22-29-09-034_com.adobe.reader-edit.jpg

Screenshot_2023-11-16-22-28-46-183_com.adobe.reader-edit.jpg

Edited by Steve87
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