Hello,

I'm new to the forums as well as to solar systems. Please help me help my installer!

So I bought a solar system for my home, consisting of 3 Axpert Max 6.5KW Inverters, 3 UP5000 Pylontech batteries, and 6 Solar Panels. The system is supposed to work as a backup (UPS) for the entire house if grid fails. 

So everything is working, and yesterday I wanted to fo the first test to simulate what would happen if grid power went out. So I switched off the main breaker of the home, solar system kicks in instantly, and everything works fine. 5 Minutes later, whole house turns off, main Inverter is showing F08 on screen. It cleared itself after about 10 minutes, and I attempted the same test again, this time no errors. So what do you think this could be? And would it be battery related since I shut off the main breaker? Apart from that the error has never shown up, but that's the only time It's been working as a UPS.

I've let the installer know and they're looking into it, however I figured I would try to gather some info here as well.

 

Here's my settings as well as a picture of the main inverter display. If there's any suggestions please let me know!

 

These are what I see on WatchPower, as I haven't messed around with the Inverter menu myself.

 

Main CPU Firmware Version: 00069.06

Secondary CPU Firmware Version: 00012.21

Wi-Fi Module Firmware: 3.6.1.6

Output Voltage is set to 127 (My grid voltage is between 125-129)

Output Source Priority: Utility - Solar - Bat

Battery Type: Pylon

Battery Cut-Off Voltage: 46.0V

Bulk Charging Voltage: 53.2V

Float Charging Voltage: 53.2V

Max Charging Current: 10

Max Battery Discharge Current: Blank

Max AC Charging Current: 20

Charging Source Priority: Solar + Utility

Battery Equalization: Disabled

Real Time Activate Battery Equalization: Cancel

Back to Grid Voltage: 48

Back to Discharge Voltage: 50

 

If there's any additional information you'd like to see please let me know!

Thank you!

 

Welcome. I am very sure the kind gents will help you. 

Sincerely

Jason 

Hi @MarioSHwelcome to the forum. Does the battery symbol flash on the inverters display, the inverter that has the Comms for the Pylontech? I see that you have an AC input & output of 127V. Are you based in the US using split phase electricity? 127V is not something that should be displayed there unless you in a 110V voltage geo region...

14 minutes ago, Steve87 said:

Hi @MarioSHwelcome to the forum. Does the battery symbol flash on the inverters display, the inverter that has the Comms for the Pylontech? I see that you have an AC input & output of 127V. Are you based in the US using split phase electricity? 127V is not something that should be displayed there unless you in a 110V voltage geo region...

Yes the battery symbol is blinking. 

And I'm located in South America, the nominal voltage here is 120V, but for some reason my area is above that. 

10 hours ago, MarioSH said:

3 UP5000 Pylontech batteries

Are the battery modules all connected in parallel, or does each inverter have its own battery module?

We have almost no experience here with 120 V models, though the firmware is the same as for 230 V models.

6 hours ago, Coulomb said:

Are the battery modules all connected in parallel, or does each inverter have its own battery module?

We have almost no experience here with 120 V models, though the firmware is the same as for 230 V models.

Yes, the 3 inverters are connected in parallel and the batteries as well. 

You are using the latest 69.xx firmware that I know of (the 69.6x are all older than 69.06).

Hopefully it was a once-off glitch.

3 hours ago, Coulomb said:

You are using the latest 69.xx firmware that I know of (the 69.6x are all older than 69.06).

Hopefully it was a once-off glitch.

I will do the same test again today to see what happens. As for my settings, do you have any recommendations?

 

Thank you.

10 hours ago, MarioSH said:

As for my settings, do you have any recommendations?

You're on PYL battery type, so most of the important settings are under BMS control. The rest seem fine.

9 minutes ago, Coulomb said:

You're on PYL battery type, so most of the important settings are under BMS control. The rest seem fine.

Sorry, what does BMS control mean? 

BMS = 'Battery Management System'... Basically, a small computer that lives inside each of the batteries which is in charge of deciding whether the battery is full, empty or whatever.  It means that the battery is able to tell the inverter what it wants or can offer in the way of power, set limits etc, rather than the inverter trying to work it out for itself.

This 'discussion' all goes on via those thin network cables between the batteries and inverter.

Edited December 22, 20232 yr by HedgeSlammer
punctuation!

You will find that values like maximum charge current will change from time to time based on what the BMS wants. So there is no point in your changing that setting; the BMS will override it.

If you change the battery type to USE, then suddenly all those battery related settings are fixed at what you set them to, and the BMS will no longer override them.