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Axpert settings for Pylontech batteries


Jaco Fabs
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Hi all. I have a 3kW Axpert 48V inverter, about 5 years old. Upgrading to 2 x 2.4 KVA 52V Pylontech batteries. Can anyone please help with Inverter settings for this setup, as there is no communication between batteries and inverter possible as far as I know?

Edited by Jaco Fabs
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On 2020/02/10 at 1:41 AM, Jaco Fabs said:

Can anyone please help with Inverter settings for this setup, as there is no communication between batteries and inverter possible as far as I know?

That's right, there is no direct cable to let the BMS call the shots; that only happens on selected 5 kVA models.

This is the document that most people start with: https://www.mppsolar.com/manual/Pylontech Lithium/Pylontech inverter setup SOP.pdf

But note these modifications that I suggest: [ edit: now now recommend lower voltages for settings 26 and 27, at 52.5 V and 51.8 V respectively. ]

 

PylonTech settings.png

Edited by Coulomb
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On 2020/02/10 at 6:36 AM, Coulomb said:

That's right, there is no direct cable to let the BMS call the shots; that only happens on selected 5 kVA models.

This is the document that most people start with: https://www.mppsolar.com/manual/Pylontech Lithium/Pylontech inverter setup SOP.pdf

But note these modifications that I suggest:

 

PylonTech settings.png

HI Coulomb

Which 5kva Axpert uses direct cable to let the bms call the shots? Will the Sol-I-ax-5p do it

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33 minutes ago, Shockin said:

Thanks for the info, how would the axpert SOL-I-AX-5P work with the Pylontech us3000b?

Just use the PylonTech as an ordinary battery. Preferably, use a Victron BMV and ICC.

Quote

  How do you get this inverter and pylontech to talk to each other?

You don't. You hope that once the cells are balanced, the BMS will sort out the slight imbalances and protect the cells without needing intervention from the inverter-charger. If it ever does, then the BMS has to get drastic, like disconnect the battery altogether.

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  • 4 months later...

What about setting 31. What would be the ideal setting and why?  I want to maximize PV generated power in preference to Utility. I find that even when PV is high a high load switches to bypass on utilility leaving the solar to only charge the battery. 

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7 hours ago, @Mak said:

What about setting 31.

Setting 31 (solar power balance) should always be enabled, i.e. SbE. That means it draws more PV power when needed to supply the loads. I have no idea why anyone would ever want to disable that feature. Maybe if you have a very variable load (e.g. 1 kW one second, 3 kW the next) and you find that the inverter overshoots the battery voltage and upsets the battery, then as a bandaid workaround you could disable solar balance, so the PV power was more steady.

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It is a stupid setting, but mine is disabled. So this happens: I have more than 4000w of panels. So I limit my maximum PV to just under 4000w with the charging amps. If I have a high load, the total PV Watts will thus also be limited. I only do it to not go over 4000w. With solar flare (I think that's what they call it) I get easily 110% of my panel specs. This works for me as my batteries are charged before I reach 3600w generation and my loads seldom go over 2800w.

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I need help to resolve my situation where with a 4kv load. The Inveter is carrying this with Eskom and using solar to charge the battery. How can I get Eskom to carry the load. This is happening at 2 pm when I expect good solar output. See my LCD below. What settings can I change to minimize Eskom use when Solar is available. I already have SBU on Setting 1

C91F40B8-537A-4105-A0A0-079A9887C101.jpeg

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  • 1 month later...
On 2020/06/25 at 3:34 PM, @Mak said:

How can I get Eskom to carry the load.

Is there any solution to this problem? 

I found that switching of Eskom forces the loads to be fed by solar and battery, I installed a sonoff switch that disconnects my Eskom supply during the day.

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On 2020/06/25 at 3:34 PM, @Mak said:

How can I get Eskom to carry the load. This is happening at 2 pm when I expect good solar output. See my LCD below. What settings can I change to minimize Eskom use when Solar is available. I already have SBU on Setting 1

Please post your full system specs and inverter settings. Then we can see if/how we can help

On 2020/06/24 at 10:12 PM, @Mak said:

I find that even when PV is high a high load switches to bypass on utilility leaving the solar to only charge the battery. 

If you load exceeds your inverter rating (e.g. 6kw load on a 5kW inverter), the Axpert will switch into bypass mode and fully run on utility. It will switch back to SBU/SUB once the load has dropped again in line with the rating

1 hour ago, Gerrie said:

Is there any solution to this problem? 

I found that switching of Eskom forces the loads to be fed by solar and battery, I installed a sonoff switch that disconnects my Eskom supply during the day.

This can be better handled by having the correct settings on the inverter. No need for any external switches

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