Question about King Axpert 5kw🤓

I have recently installed a King Axpert 5kw with 2 Pylontech 2,4kw/48v batteries

My previously system was almost similar just with a AGM 9,6kw batteriebank and an inveter from 2018, with nearly the same spec as the Axpert.

My problem is that with the old system I could easily run a washing machine( peak use 2,2kw(pump included) on a day with medium to plenty of sun, and the batteries would be fully charged in between the peaks and immediately after use.😁

With the new system the batteries will be drained(not emptied) during use😖, it seems like the invert doesn’t draw power from the panels.

It is almost like when the batteries are full( normally around 12 noon)the inverter denies to peek up again, when the voltage of the batteries lowers, f.ex when load is applied to the system🤨

In other words, more or less from around noon and the rest of the day the inverter will only draw around 100w from the panels(they can produce 1,8kw)

The inverter and the batteries are connected through the RS485 port.

Kind Regards and Thanks for any Help🙏

 

On 2023/01/08 at 10:46 PM, Holler said:

with 2 Pylontech 2,4kw/48v batteries

I assume you mean 2,4 kWh battery modules.

On 2023/01/08 at 10:46 PM, Holler said:

My problem is that with the old system I could easily run a washing machine( peak use 2,2kw(pump included) on a day with medium to plenty of sun, and the batteries would be fully charged in between the peaks and immediately after use.😁

With the new system the batteries will be drained(not emptied) during use😖,

You should have about the same usable energy in the two batteries, assuming that you didn't discharge the AGMs more than 50%.

On 2023/01/08 at 10:46 PM, Holler said:

In other words, more or less from around noon and the rest of the day the inverter will only draw around 100w from the panels(they can produce 1,8kw)

It could be the premature float bug. What version of main (U1) firmware are you running on the King? You may be able to use the lightly patched firmware that fixes this. Although as I type this, I wonder if using the PyL battery type and the RS-485 cable might work around this.

What SoC are the Pylontechs at when they're supposedly fully charged? Does the SoC go down after this? You might need special Pylontech software to interrogate the SoC as seen by the Pylontech BMS, and connect to the RS-232 port of the master battery. I can't recall if the Kings show true (BMS) SoC when battery type is PyL and the cable is working.

 

Morning Coulomb

 

First of all Thank you for answering😌

yes I am talking about 2,4 kWh 😏

We have always tried to keep the agm-batteries above a discharge of 75%, meaning only using 25% of the capacity.

Explanation: We live in a tepee while renovating our house/ruin, therefore don’t use a lot of power😉

About the software, I gues, I can only see that via a computer 🤔 or can I check that on the screen🤓

I hope the attached pictures answer your question.🙄☺️
They are both take at 2,22 pm

From then on the voltage stay the same until the solar panels stop producing, unless we put load on, then the voltage starts to go down😒

In theory I don’t care about the cable, I just have an idea that with this, I have a kind of certainty that the settings are right, and the system will work better. But ……

And then I simply don’t understand that the incoming voltage/amps/watts  from the pv’s don’t rise, when we put load on the system🤨

Kind Regards and once again Thank you for answering 😌

5 hours ago, Holler said:

And then I simply don’t understand that the incoming voltage/amps/watts  from the pv’s don’t rise, when we put load on the system

There were PV issues with early King firmwares. What main (U1) firmware version are you running at present? 

Evening Coulomb

This is the firmware that’s on the inverter.

I have been trying to locate a newer version, but so far I have not found where to download it. 

And yet 71.97 is on this very forum: