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Voltronic Axpert King 5KW,12 x 330W PV,1xPylon Tech 3.5KW


ALP
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Hi I am a newbie in need of advise.

My setup is Axpert 5Kva 5000w MPPT King Inverter, 12 x 330W PV, 1 x Pylon Tech 3.5KW.

Special cable between Inverter and Battery provided by Inverter supplier for BMS.

DC board split in two, Kitchen except refrigerator on Mains and rest of house on inverter.

Solar Geyser

Gas Stove

Setting in inverter are

1 =Output source priority SUB from 6 PM to 6AM then on SBU
2 =Maximum charging current 10A
5 =Battery type PYL
6 =Auto restart when overload occurs Restart Enable
7 =Auto restart when over temperature occurs Restart Enable
10 =Operation Logic Auto
11 =Maximum utility charging current 30A
12= Setting voltage point back
to utility source when
selecting “S BU” (SBU
priority) or “SUB” (Solar
first) in program 01
46V
13 Setting voltage point back
to battery mode when
=selecting “SBU” (SBU
priority) or “SUB” (Solar
first) in program 01
51V
16 Solar energy priority
=To configure solar energy priority for battery and load
    SLB/UDC
23= Bypass function: Bypass Enable
26= Bulk charging voltage
(C.V voltage)
53.2V
27 =Floating charging voltage 53.2V
29= Low DC cut
off voltage:
47V
32 =Bulk charging time Auto charging time

Is the settings correct in Inverter?

How can I lower units use per day as I use 28 units per day still.

Thank you

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3 hours ago, ALP said:

Is the settings correct in Inverter?

Welcome ALP

I am not an expert with the King as I have an older Axpert, but I believe there are a few settings that you should change:

  1. #2=Maximum charging current: your Pylon can handle up to 37A charging current, so I would recommend you change this to 30A (in line with your setting #11)

  2. #12=Back to Utility Voltage: I have mostly seen 48V as recommended setting. You need to check what your Pylon's SOC is at that voltage and then adjust according to your what lowest SOC you want to keep in your Pylon

  3. #13=Back to Discharge Voltage: If you have lots of PV surplus available beyond your load, I would recommend settings this to a relatively low voltage (maybe start with 49V). Then see if your Pylon gets fully charged during the day. If not, increase this voltage

  4. #26=Bulk Charge Voltage: Recommended voltage here in the forum for Pylons is 52.5V

  5. #27=Float Charge Voltage: Recommended voltage here in the forum for Pylons is 51.8V

  6. #29=Low DC Cut Off Voltage: This needs to be lower than #12. I would recommend 46.5V or 47V

  7.  I do not know about settings #10, #16, and #32

3 hours ago, ALP said:

How can I lower units use per day as I use 28 units per day still.

A few questions to better understand your situation:

  1. What is your average load during daytime and nighttime respectively?
  2. Do you have any data available on your PV production on a normal day?
  3. What is your 'Charger Source Priority' (#16 on my Axpert) set to? 
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I've run similar tests on my electricity usage, across two days I tried to have the loads the same and simply wrote down how many units of electricity I had on my prepaid meter. One day had the inverter with panels etc all running from 13:00 - 13:00 the next day. Then at 13:00 I'd switch to bypass and pull everything from the grid. Take some measurements throughout the day and compare. There's probably a more elegant way to do this, it worked for me.

 

29 units a day does seem quite high, what runs solely on the grid?

 

Might also be worth while into looking at some data solutions, many guys around here have ICC software, or roll your own with some nice Grafana dashboards. That's a new rabbit hole all together though :)

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5 hours ago, ALP said:

 

Setting in inverter are

1 =Output source priority SUB from 6 PM to 6AM then on SBU
     

In interested in your time based setting here. I don't have that on my King, its one setting for all time. ?? I wonder of this is different firmware? I bought mine two weeks ago. 

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  1. What is your average load during daytime and nighttime respectively?                                                                                                                                                                                                    Day average is about 1000W and when pool pump comes on it is about 2200W. Night time it is about 1000W down to about 500W 
  2. Do you have any data available on your PV production on a normal day?                                                                                                                                                                                                       When looking on WatchPower it normally show just above what power are used. I see when load is high then it will provide about 3050W max
  3. What is your 'Charger Source Priority' (#16 on my Axpert) set to?                                                                                                                                                                                                                  SLB/UDC
  4. 29 units a day does seem quite high, what runs solely on the grid?                                                                                                                                                                                                                 Kitchen appliances when needed. Kettle, Microwave ,Oven and geyser hour at night when not hot enough from solar and hour in the morning.  
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I did change the following but it just change back to 53.2V on both. I think it is related to 

5 =Battery type = PYL  
  1. #26=Bulk Charge Voltage: Recommended voltage here in the forum for Pylons is 52.5V

  2. #27=Float Charge Voltage: Recommended voltage here in the forum for Pylons is 51.8V

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1 hour ago, ALP said:

I did change the following but it just change back to 53.2V on both. I think it is related to 

5 =Battery type = PYL

Ok - and probably yes  (my old Axpert does not have that setting). Have you tried changing battery type to 'User'? Then you should be able to adjust those settings

2 hours ago, ALP said:
  • What is your average load during daytime and nighttime respectively?                                                                                                                                                                                                    Day average is about 1000W and when pool pump comes on it is about 2200W. Night time it is about 1000W down to about 500W 
  • Do you have any data available on your PV production on a normal day?                                                                                                                                                                                                       When looking on WatchPower it normally show just above what power are used. I see when load is high then it will provide about 3050W max

Those values all sound about right (meaning that your PV should definitely be sufficient to cover your loads on a normal day and that PV is also actually producing)

2 hours ago, ALP said:

What is your 'Charger Source Priority' (#16 on my Axpert) set to?                                                                                                                                                                                                                  SLB/UDC

That also sounds right. I first thought that maybe you had charging from Utility enabled

4 hours ago, iops said:

Might also be worth while into looking at some data solutions, many guys around here have ICC software

I can strongly recommend this. Not only will it provide you with more detailed insight into what is happening in your system, but in your case it can also automatically do the time-based changing between SBU and SUB for you. I am also using the APM add-on to ICC to automatically switch my pool pump on/off based on excess PV.

I bought my own Raspberry Pi and only bought the ICC license from Manie. For me, probably the best investment for my solar system that I made 😉

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