mixed orientation in central inverter & mixed orientation in one string

[Chae Han Lee]

Hello,

Can I simulate mixed orientation in central inverter with one MPPT

and mixed orientation in one string?

A7-03 is one string with Orientation #1, A7-10 is one string with Orientation #2, A7-02 is one string with Orientation #1, #2 (Mixed orientation in one single string)

 

Please, tell me how to simulate this project.

[Michele Oliosi]

Dear Chae Han Lee,

At the moment, it is not possible to simulate a mixed orientation in a single string. By the way, doesn't that cause important mismatch losses within the string?

For the other cases (mixed orientation in a central inverter) that is possible, as long as each string has a given orientation.

[Chae Han Lee]

Dear @Michele Oliosi

Thanks for reply to my question.

Is it possible mixed orientation in a central inverter with one MPPT? Can you give me some information about how to give orientation each string?

[Michele Oliosi]

Yes, it is possible. In the sub-array with the central inverter, you should use the “Mixed #1 and #2” orientation. Then you can distribute strings using the slide bar at the bottom, or the tool “Orient distrib.”.

For example (using the DEMO residential, and modified):

[Chae Han Lee]

Dear @Michele Oliosi

Thanks for reply to my question again.

If there are more than 3 orientations in single central inverter, do I have to simulate modify OND file with multiple MPPTs? like link below?

I think if I modify central inverter's OND file with multi MPPTs, it is not diffrent from multi MPPT string inverter even if using power sharing. isn't it?

 

 

 

[Michele Oliosi]

Yes, currently you can mix only two orientations, so indeed, if you have 3 orientations or more, you should artificially add MPPT inputs to your inverter.

[Chae Han Lee]

Dear @Michele Oliosi,

Thanks for reply my question. it is helpful for my work!