Want to optimize my TS4-A-F

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    Greg Smith Community Moderator
    Early Adopter

    Hi Pedro, connecting an array to a generator port is an interesting and inventive application! 

    If I understand you correctly, you have one string of 5 modules using the F's. Your micro array has 17. Unless I am misunderstanding your application, 5 > 17, so that ENPH array would produce more power. Also, the Fs do not provide module level monitoring so you are relying on the Sol-Ark string level production data.

    If there is no shade or drastically different angles between the two arrays, the O's will not provide any extra production. However, the Os will hedge your array against future degradation.

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    Pedro Gautier

    Greg… Thanks for your comments. The MI (AC current) connection to Sol Ark is recommended by Sol Ark engineers, being one of the wounderfull features of this great Inverter.

    Through the PV Pro app, that controls the Sol Ark, I am able to collect MI and Tigo production (KWh) data, in real time, as well as Amperage and Voltage data of both arrays. Also, I am able to calculate production per module of both arrays, and compare both at the same time. Because of irradiance fluctuations, clouds, and time of day, I have noticed a diference in performance under equal waether conditions. Consistently the EnPhase MI produce 20% more.

    Because the AFs are only to provide rapid shut down, not being optimizers, I though about changing them for AOs for the sake of more production.

    My modules are all Silfab 490 HN. Having a group with MI and another with Tigo is a very good design because each array group compensate the other group under variations in climate conditions. When there is Clipping on the MIs, the Tigos compensate. When there is low irradiancen(down and dusk), the MIs produce more than Tigos.

    All I am trying to explore now is if I could get even better performance with the TIgos AOs, before making an investment.

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    Greg Smith Community Moderator
    Early Adopter

    Ok, thank you for the context, Pedro. the short answer to your last statement is "Yes, but...."

    I want to manage expectations when it comes to using optimizers since there is so much misinformation out there. For example, our competitors state that you can get 25% more energy from shaded modules, and that just isn't true. As I said, the optimizers will hedge against future degradation if there aren't any mismatch factors present at commissioning. 

    The TS4-O will help squeeze out as much energy as possible from the module. Tigo represents this value as Reclaimed Energy. Generally speaking, optimizers (regardless of make and model) help reclaim or recover any lost energy from module mismatch. If there isn't lost energy from shading, for example, then the gains will be small, if anything.

    But as the module degrades, suffers soiling, or trees start to grow around the perimeter that cast shadows on the array, then the gains will start to really show. 

    So, "Will I get better performance from the Tigo Os?" is a loaded question, as it would be for any module level device. Generally speaking, yes, you would, but it is difficult to measure those gains without software modeling tools, and those usually underperform. 

    You state the ENPH produces 20% more, and that sounds plausible, although without looking at your system, it is hard for me to quantify. Using different technologies to compensate for varying light levels sounds interesting. I don't want you to get the impression you will get all these gains from the TS4-Os, especially since you only have 5 modules using them compared to 17 modules using micros. That isn't a fair comparison and I don't want to see you here a few months from now complaining that the Tigo Os "aren't working".

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