Max current per PV input

[Devo42]

Hi guys, I've got a new system I think is under performing. It never produces more than 6Kw even with 10Kw of panels and a sofar 7.5ktlm inverter. Feed in limiting isn't the issue. I think its might be because the installer out too many panels on PV input 1?
Im inverter specs are:

The current input on PV 1(a single input) is 12.6A but the specs says Max 11A. There are 3 pv inputs on the inverter, 2 on PV1 and 1 on PV2.

What do you guys think?

 

[Bud Martin]

What do you see if you add 1000W of AC load?
What is the spec of the panel? How many panels in each PV input?

 

[Devo42]

What do you see if you add 1000W of AC load?
What is the spec of the panel? How many panels in each PV input?

When it's generating 6KW and I turn on a pump that's draws about 1000W it still generates 6KW.

 

[Bud Martin]

In your picture, it shows AC output of 250.70 VAC 23.60 ACA = 5900W of AC load (which means the power input to the inverter will be higher than 5900W), that is why I ask you to add more AC load to make it goes over 5900W to see what the input power will go up.. Your SCC can only provide 7500W of power so you are getting close to the limit already.

 

[Devo42]

Thank your for your help.
I don't really understand though.
Why does my 7.5KW inverter show 6KW of output near it's limit whilst my mate who has an 8KW model shows 8KW at peak?

 

[Bud Martin]

Thank your for your help.
I don't really understand though.
Why does my 7.5KW inverter show 6KW of output near it's limit whilst my mate who has an 8KW model shows 8KW at peak?

Because your AC load is only PULLING 5900W (250.70 VAC x 23.60 ACA) from inverter, the more loads you add to the AC outlet the more power you will see, you are only PULLING 5900W, the inverter is not going to push 7500W of power to the load, the load pulls the power from inverter as needed by the load.
If you add more AC load than what it has right now, 250.70 VAC @ 23.60 ACA, you should see the current go up higher.
Look at a simple way, your home AC outlet can supply over 2000W power but you only plug in 100W lamp into the AC outlet so the lamp will only pull 100W of power from the outlet, 2000W of power is not being pushed into 100W load.