Oversizing SolarEdge Optimizers

[JMcIntosh]

The latest guidelines from SolarEdge indicate that string sizes may be up to 15,000 w. PVsyst V 6.43 does not allow oversizing. What parameters do I change to increase the allowable wattage on a SolarEdge optimizer string?

Thanks in advance

[André Mermoud]

Solaredge has not shared theid latest Guidelines with us.

However I don't understand well which limitation you are speaking about. Please give a screenshot of window in error, and the exact error message.

[JMcIntosh]

The latest design guidelines from SolarEdge on the newest 3-phase inverters can be found here: http://marketing.solaredge.com/acton/ct/8801/s-0783-1603/Bct/q-0047/l-0045:e06/ct1_0/1?sid=s3KKU5ipp

[JMcIntosh]

Here is a screen snip showing the 20 optimizer limit. The newest guidelines would allow 25 optimzers per string 15,000 / 300 / 2 = 25. The data sheet indicates a max of 30 optimizers per string. It can be found here. http://www.solaredge.us/files/pdfs/products/power-optimizers/se-P5-series-commercial-add-on-power-optimizer-datasheet-na.pdf

[André Mermoud]

We have to get instructions from SolarEdge for modifying the installing conditions (which have been established in close collaboration with the manufacturer).

We are in touch with them.

[SE2015]

A current workaround to this limitation is to design shorter strings, just for the PVsyst simulation (in practice you will install with the over-sized strings).

This will have no effect on the simulation.

So for example: you want to design an SE27.6K inverter with 3 strings of 22 power optimizers (each optimizer connecting to 2 modules in series, so the result is 66 power optimizers = 132 modules). PVsyst perhaps limits the string length to 18 optimizers, so you could instead specify 6 strings of 11 power optimizers, giving you the same result (66 power optimizers/132 modules).

Any mathematical combination will work, as long as you get the number of modules you want.

See the attached image.

[aaronrodg]

The latest design guidelines from SolarEdge on the newest 3-phase inverters can be found here: http://marketing.solaredge.com/acton/ct/8801/s-0783-1603/Bct/q-0047/l-0045:e06/ct1_0/1?sid=s3KKU5ipp

 

Great work!

[SolarJ]

Has there been any movement on extending the power optimizer definitions inside the software? I can not go beyond 19 with a 72 mono when design guidelines define the use of 20.

[aaronrodg]

Did you find any?

[aaronrodg]

Yes give some idea on it i am also waiting....

[aaronrodg]

Agree with you mhamon.