Axpert invertors

Krugeran51 said:
Hi Sunmaster. Those firmware need to be the same. Where did u get your inverters from they should be able to give u update. Else Pm me I've got latest 72.40 but please don't blame me if things go pear shape. Upgrading firmware needs no rocket head. Inverter beep for +/- 9min while update is running.... That's it����
Click to expand...

Eish i need more help :cry:

1. can i use the usb cable to do the update ?

2. if not will a serial to usb adapter work as my laptop do not have a serial port

Regards
 
Draganchor said:
OK So I have a Axpert 5kva (4k watt) arriving in 3 weeks. (Retron @ +/- ZAR 8,3k)

I thought I would start a thread on this particular inverter as it seems a very cost effective solution for the average household. Same manufacturer as Infinisolar, please see http://www.voltronicpower.com/oCart2/index.php?route=product/product&path=24&product_id=132

I have calculated that my usage (excluding geyser, pool pump, which will not be on the inverter) will be about 3.5kwh at max, or perhaps 25-28kw per day. This shall be reduced before the install of the Axpert.

I live in a very high wind area, so I am investigating a domestic wind turbine to supplement a relatively small PV array.

Step one, Axpert inverter, battery bank (I have a contact for batteries, not sure of the type just yet, will update)
Step two, PV, will need an expert to install this as I have a not a clue on this. flat roof in high wind area, so considering 1.8 x times of panels due to concerns on panels flying off...
Step three, finding a decent wind turbine that is small, I guess I wont notice any noise when the SE is humping.

So anyone buying an Axpert inverter, please chime in

Cheers
Click to expand...

Hi Draganchor

I own and operate a specialist solar company, and I am more than willing to assist with the solar side of things. Based in Northern Subs, but have clients as far south as Cape Point.
Have you decided on the tech you'd like to apply? Thin film / Poly?

Let me know if I can assist.

Regards,
SM
 
Has anyone else ever installed a remote control panel on the 5kVA unit? I get an error (20) that is not in the manual?
 
Sarcasm... How refreshing! Maybe if you read to think and assist in stead of read to respond and be a smartass you will realise that these panels are probably slightly more IT related than inverter related? Can you help or is that your way of hiding your ignorance?
 
Is there a difference between the Axpert inverter and the CB Solar Synapse 4.0+? I asked the supplier for Axpert and he delivered Synapse - said it's the same thing just different people import it. Axpert is brought in by Rectron and Synapse by someone else.

Truth?
 
Shellyb1 said:
Is there a difference between the Axpert inverter and the CB Solar Synapse 4.0+? I asked the supplier for Axpert and he delivered Synapse - said it's the same thing just different people import it. Axpert is brought in by Rectron and Synapse by someone else.

Truth?
Click to expand...

Yes, the CB Solar Synapse 4.0+ looks like another re-branded Axpert.
 
Hi
Hope someone tried this as well.
Connected a Raspberry Pi (loaded with Ubuntu Mate and NUT) to the Serial cable of the inverter (with RS232<->USB cable) via USB.
Not getting connectivity to the Inverter. When connecting via PC directly to the Inverter it works. Could be some driver issues. Has anyone been able to use NUT on the Axpert 5KVA inverter?
http://www.networkupstools.org/
The Voltronic UPS / Inverters are supported under NUT.
 
Bill Meyer said:
Hi
Hope someone tried this as well.
Connected a Raspberry Pi (loaded with Ubuntu Mate and NUT) to the Serial cable of the inverter (with RS232<->USB cable) via USB.
Not getting connectivity to the Inverter. When connecting via PC directly to the Inverter it works. Could be some driver issues. Has anyone been able to use NUT on the Axpert 5KVA inverter?
http://www.networkupstools.org/
The Voltronic UPS / Inverters are supported under NUT.
Click to expand...

I got it working but I'm not using NUT. How are you doing the RS232 -> USB?
 
I'm not sure if NUT will work. Voltronics make a wide variaty of equipment, also real UPSes and I think most of their equipment share the basic idea of the protocol. But there are many dialects. A lot of the commands on the NUT Voltronic page does not work on the Axperts or Infinisolars.

There some guys on powerforum.co.za busy with it. Look at the Look at the "Axpert MKS Stats" thread for instance. I do have a Pi hooked to my Infinisolar, but just use it to pass the data on.
 
Do not connect laptop with USB port... Only have your remote control panel connected to inverter. Also make sure you have 5v connect to side little USB port or use the R11 plug cable and connect yellow and green cables to two outer port (NC/ NO) of green plug on inveter
 
SolarMan said:
Sarcasm... How refreshing! Maybe if you read to think and assist in stead of read to respond and be a smartass you will realise that these panels are probably slightly more IT related than inverter related? Can you help or is that your way of hiding your ignorance?
Click to expand...

I have actually installed both the inverter, the panels and the remote control panel. it's really not that difficult. Finding the fault code on google is fairly easy as well, it mean "PV is low loss" - although that might mean a few things since it's interpreted from Chinese / Japanese. I guess it means your PV arreay voltage is too low. It should ideally be round about 100-140V for optimal performance.
 
savage said:
As all of them are for "automotive" applications, and only one provides a voltage rating of 32V, I think it's safe to assume that all these fuses are rated only at 32V. They are thus no good for 48V battery banks.

Automotive (car) fuses are also fast blow fuses, not ideal. You ideally want slow blow, ceramic (not glass) fuses too in any case.

A 1000V/125A Fuse holder (din mount, 22x50 cylindrical) will set you back +- R125, depending on brand
A 1000V/32A Fuse holder (din mount, 22x10 cylindrical) will set you back +- R50, depending on brand
Click to expand...

Hi Chris,

Do you mind indicating where to source the "1000V/125A Fuse holder (din mount, 22x50 cylindrical)" at that price?

Thank you.

Regards,
Willie
 
Schicks said:
I just ran a quick test on my setup. With Eskom on the inverter output voltages are as follows: L-N = 226V, L-E = 226V, N-E = 0.3V. This shows me that my earth and neutral are correctly bonded at the main supply.

Two scenarios now:
1. Main breaker on the supply DB trips. This is a double pole breaker, so both live and neutral are disconnected. L-N = 230V, L-E = 120V, N-E = 110V. This shows that my neutral is no longer bonded to earth.

2. Simulated grid failure. My municipal supply is via a single pole circuit breaker so the incoming neutral remains connected. L-N = 230V, L-E = 230V, N-E = 0.3V.

So it would seem that the only time the earth/neutral bond is lost is in the event of a local main trip. My supply to the inverter is via a single pole CB, so if that trips the bond is still there.

During load shedding there is no trip or disconnection of either the incoming live or neutral and in this case the earth/neutral bond is still there.

Could someone else do, or has someone else done a similar test and what were the measurements?
Click to expand...

Sorry for the delayed post
I haven't as of yet done anything to address the floating neutral problem. These are my readings:

With Eskom supplying:
L-N = 228V
L-E = 228V
N-E = 0.7V

With main breaker switched off (double pole):
L-N = 230V
L-E = 85V
N-E = 90V
(Neutral is floating and not bonded to earth)

With single pole municipal breaker off: More or less the same readings as with double pole main breaker

This all makes sense because there is still no connection form neutral to earth with the inverter supplying power. Now comes my question... What would be a good way to connect the 2 neutrals on the inverter? Did you connect the in and out terminals on the inverter? With Eskom supplying power (inverter in bypass mode) there will effectually be 2 neutral conductors for the current to flow in from the inverter back to the main neutral bar, correct?
 
Last edited:
Need some help please.

I have 2 x Axpert inverters in parallel.

Do I need to monitor each inverter independently (run cables to pc from each inverter) or can I run one from the master and it will pull through both inverters and their banks of batteries?
 
Has anyone got temperature degrading information on the MKS Inverters?
As with any electronic device, heat plays a big role.

I have found this sort of spec with more expensive Inverters, which is quite useful, but nothing on the Axpert.

Also: My supplier informed me that the MKS 5kVA, although "Grid Tied", does not have a "pass-thru" function and will shut-down or restart if the demand is more than 4kW for more than 2 seconds.
And because the Inverter is "Grid Tied" between Municipal Feed and AC DB, it will leave the household in the dark until it starts up again.
Has anyone experienced this?
 
prinslja said:
Also: My supplier informed me that the MKS 5kVA, although "Grid Tied", does not have a "pass-thru" function and will shut-down or restart if the demand is more than 4kW for more than 2 seconds.
And because the Inverter is "Grid Tied" between Municipal Feed and AC DB, it will leave the household in the dark until it starts up again.
Has anyone experienced this?
Click to expand...

It makes use of a relay to transfer power so it makes perfect sense that it would not allow more than 4kW regardless of "mode".
 
Gnome said:
It makes use of a relay to transfer power so it makes perfect sense that it would not allow more than 4kW regardless of "mode".
Click to expand...

IMHO it's not ideal to have the inverter restart or even shut down.
More expensive inverters (and not by a country mile), will allow for grid pass thru of up to 56A in some cases, meaning that you will never be "disconnected" if the demand increases beyond the inverter's output.
One never knows what unexpected load condition may occur.
 
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