Axpert invertors

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
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I agree that the voltage rating must be adequate.

As far as I understand, the battery fuses are to protect from shorts on the cables? So why does fast/slow blow make a difference?
 
Hi all, I am desperately looking for some assistance from one of the knowledgeable members. I bought an Axpert 3KW 24 volt MKS PLUS unit and connected four 6 volt trojan T125 cells (240Ah) with it. However I keep getting the error message stating battery overcharging. It works with no problem on DC. I got the batteries checked twice and they are okay. My electric contractor says I should have gone with 100Ah cells. However I am aware of someone using the same batteries with the same model with no problem! Can the cabling affect this? Apparently he has used 4G cable instead of 8 AMG. I am having sleepless nights having invested quite a fortune on the set up and sitting in darkness. Your help is highly appreciated!
 
blacknight72 said:
Hi all, I am desperately looking for some assistance from one of the knowledgeable members. I bought an Axpert 3KW 24 volt MKS PLUS unit and connected four 6 volt trojan T125 cells (240Ah) with it. However I keep getting the error message stating battery overcharging. It works with no problem on DC. I got the batteries checked twice and they are okay. My electric contractor says I should have gone with 100Ah cells. However I am aware of someone using the same batteries with the same model with no problem! Can the cabling affect this? Apparently he has used 4G cable instead of 8 AMG. I am having sleepless nights having invested quite a fortune on the set up and sitting in darkness. Your help is highly appreciated!
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As long as your 4 batteries are connected in series to give you the 24V that the Axpert requires, and you are using the proper size wire it should work.

I presume you are referring to American Wire Gauge? 8AWG = 8.36mm[SUP]2[/SUP] and 4AWG = 21.2mm[SUP]2[/SUP]. 4AWG is thicker and has therefore a better current carrying capacity. You can draw up to around 100A in that setup, therefore the 4AWG is sufficient.

Have you tried using other batteries to test the Axpert?
 
Help with right battery

savage said:
Made by Voltronic, same guys who also make the InfiniSolar inverters. I've installed quite a few and had nothing but absolute pleasure out of them.

OP's price is rather low for the 5KVA unit though
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I used Trojan T125 6 Volt batteries with my Axpert 3KW 24 volt MKS PLUS unit. However it keeps flashing error message that battery is overcharging. The batteries were checked and found to be okay. The dealer for inverter is stating that I should use it with 100Ah batteries. Please advise.
 
Thank you for your reply. You are right . It is AWG. In the user manual that i downloaded from the web it is recommended to use 8AWG with 200Ah if i remember correctly. My electric contractor is planning to test it with a set of 100Ah batteries tomorrow. Apparently it tripped once after installation when the kettle was switched on. Can it lead to faulty charging?
 
I'm using the same batteries on my 5KVA - no issues...

Can you post pics of your battery bank (good quality pics), all the connections / crimps, and what error code(s) are you seeing?

Who did the installation, you or your electrical contractor?

EDIT: The 3KVA unit only allows for 2400W - it's easy for the unit to trip on a overload when other things AND the kettle is on at the same time. Your kettle alone will be close to (if not over) 2KW. Somehow, I smell yet another badly planned installation...
 
I am 2 days away from completing my installation and the Axpert manual I have and the manual that accompanies the the Aussie PIP differ in that our (Axpert) manual says program 2 maximum charging 70 - 120A whereas the Aussie manual says 10 -120A. Would some one who has access to an Axpert or who knows tell me what is the minimum 70 or 10A?
 
savage said:
I'm using the same batteries on my 5KVA - no issues...

Can you post pics of your battery bank (good quality pics), all the connections / crimps, and what error code(s) are you seeing?

Who did the installation, you or your electrical contractor?

EDIT: The 3KVA unit only allows for 2400W - it's easy for the unit to trip on a overload when other things AND the kettle is on at the same time. Your kettle alone will be close to (if not over) 2KW. Somehow, I smell yet another badly planned installation...
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Hi Chris, thank you for the response. The installation was done by an electric contractor. I am not at home currently hence regret unable to provide the pictures. The batteries are connected in series. The inverter is Axpert 3KW MKS plus 24 volt. (Model SOL-I-AX --3M PLUS 24). The plan was to exclude the kettle and other high power utility items. I bought the battery bank and inverter based on input from experienced members in this industry on forums like this. Some are using 2 parallel banks of the 215Ah with the same model inverter with no problems. So I doubt if it has to do with one bank of 240Ah batteries.
 
blacknight72 said:
Hi Chris, thank you for the response. The installation was done by an electric contractor. I am not at home currently hence regret unable to provide the pictures. The batteries are connected in series. The inverter is Axpert 3KW MKS plus 24 volt. (Model SOL-I-AX --3M PLUS 24). The plan was to exclude the kettle and other high power utility items. I bought the battery bank and inverter based on input from experienced members in this industry on forums like this. Some are using 2 parallel banks of the 215Ah with the same model inverter with no problems. So I doubt if it has to do with one bank of 240Ah batteries.
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Forgot to mention that the error code showing is fault 3.
 
blacknight72 said:
Forgot to mention that the error code flashing is fault 3.
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Also make sure that your battery type is selected correctly (program 5). If you've selected user defined, you must also make sure the voltage levels are set correctly (programs 26, 27, 29). This COULD cause problems. I went with flooded, as I'm using traditional flooded lead-acid types. I believe yours are also this type.
 
Strange then indeed.

Without seeing what has been done, and without basic measurements (i.e. voltages and what not), it's really not possible to say what's going on.

Either something is broken (which I doubt), or there's a wiring fault, or someone messed with the programing / settings of the Inverter yes.

EDIT: IF there is indeed a overvoltage scenario, your batteries may already be damaged too... Overcharging batteries isn't a good idea.
 
blacknight72 said:
Forgot to mention that the error code flashing is fault 3.
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I think the programming/setup of your Axpert is incorrect, as DollyAAAA mentioned.

The factory setting for "battery type", setting 5, is AGM. Aren't you batteries normal flooded lead-acid? That setting would need to be changed. AGM has a constant voltage charge phase @ 28.2V, while the flooded battery has this phase @ 29.2V.

I guess your batteries are showing a voltage higher than this value, or the float charge voltage of 27V (common for both).

I'd be pissed off with the installer if this is the case! He should check the data sheet of you batteries, and program the unit accordingly - with user values if necessary.
 
greg_SA said:
I'd be pissed off with the installer if this is the case! He should check the data sheet of you batteries, and program the unit accordingly - with user values if necessary.
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Just remember... Assumptions are the mother of all f-ups :whistle: Not saying it is, or isn't so, but -anyone- can change those settings, very quickly and easily.
 
savage said:
Just remember... Assumptions are the mother of all f-ups :whistle: Not saying it is, or isn't so, but -anyone- can change those settings, very quickly and easily.
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For sure :) It would be nice if those settings needed an installer code to be entered first.
 
Anyone able to suggest an installer for these in Johannesburg?

Wife keeps going on about having an alternate power solution and I saw that geewiz (http://www.geewiz.co.za/inverters/3...sine-wave-inverter-w-parallel-kit-mks-5k.html) has the 5kva for R12k now.

I'm assuming I'd have to get 5-6 batteries as well? and would you recommend connecting directly to the DB with automatic switch over or manually connecting once the power is out?

Ideally looking for a setup that will last 3 hours and possibly include the fridge and freezer.
 
Arzy said:
and possibly include the fridge and freezer.
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Just explain to me why quickly? I get SO many customers too wanting this...

Just like your geyser, if you keep the doors closed and opening/closing to a minimum, your fridge/freezer will most certainly not get so warm as to spoil the food within a 2 or 3 hour period??

I'm just failing to understand the logic here...
 
savage said:
Just explain to me why quickly? I get SO many customers too wanting this...

Just like your geyser, if you keep the doors closed and opening/closing to a minimum, your fridge/freezer will most certainly not get so warm as to spoil the food within a 2 or 3 hour period??

I'm just failing to understand the logic here...
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Wife is paranoid about the stuff in the fridge/freezer due to milk and food for the baby
 
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