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Axpert MKS Plus 3K


Chrisy
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Hello everyone. I have been looking all over the web for someone with stock of the Axpert inverter. Do anyone perhaps know where I can get one? Even second hand is fine. I am looking for the 3K model. I have a couple of servers that I need to run. I already have 8 x 110ah batteries to connect it to.

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Thanks everyone. Seems like I can get one. Just one question though. The smaller units only take 600 watts of panels. The load from my servers is 800w constant.

Would it be better then for me to go for the 5kva unit that can take 3000watts of PV panels?

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Thanks everyone. Seems like I can get one. Just one question though. The smaller units only take 600 watts of panels. The load from my servers is 800w constant.

Would it be better then for me to go for the 5kva unit that can take 3000watts of PV panels?

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Thanks everyone. Seems like I can get one. Just one question though. The smaller units only take 600 watts of panels. The load from my servers is 800w constant.

Would it be better then for me to go for the 5kva unit that can take 3000watts of PV panels?

 

If you want to run your servers from solar most of the time you would obviously need more than 800W if their constant consumption is 800W.  To get 800W from solar panels you would need to have 4 x 200W PV panels with direct sunlight and an irradiance of 1000W/m2 - that is ideal conditions without any losses.  Currently (not summer) you will not necessarily get irradiance of 1000W/m2 and unless you are planning to use a sun-tracker to ensure that the sun hits your panels directly, you will not get 800W from 4 x 200W panels, not even in summer.  Then you still have to add losses in cabling and the efficiency of the inverter.  

 

You don't have to get the 5KVA unit, according to the user manuals the 2KVA 24V Plus and 48V Plus models will accept PV up to 1500W and the 3KVA 24V Plus and 48V Plus models will accept PV up to 3000W - just make sure you get the "plus" models.

 

I would suggest that you add panels of at least double the power required by your servers, in order to charge the batteries if and when access PV power is available.  You did not mention if you want to run the servers off-grid (only from PV and batteries) or not, because if you want to run them off-grid, you might have to re-calculate everything, because then you might need much more batteries and more than 3000W of PV panels.

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superdiy

 

Thanks for the detailed answer. I will make sure to get the PLUS model. I do not want to run off-grid at the moment. I will get to that over time. All I want for now is to run off the PV panels during the day, and run off Eskom at night. By having the batteries as well, I can then run off those when load shedding hits me in the evenings. The eight x 110Ah batteries should be enough for now. If not, then I will just add another four.

 

Even if I can just run part of the day off solar, that is also fine with me. I just need a solution to the load shedding problem. I have a silent diesel generator I am using at the moment, but I absolutely hate the thing.

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