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lilboy509 avatar image

SmartSollar MPPT 150/85-tr

I Have 6 solar panels of 400 watts each for a total of 2,400 watts. On the victronenergy.com website I saw that the model 150/85-tr can handle a maximum of 2,400 watts. I would like to know if I can connect my solar panels on it without any issues in the future?


The reason I asked this question is this: the controller can support up to 2,400 watts. Should I install less than 2,400 watts and leave a margin? Or can I install 2,400 watts directly without leaving any margin.

Thank you.

smart solar set-up help
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3 Answers
JohnC avatar image
JohnC answered ·

Hi @lilboy509. That's a 'nominal' rating, and refers to what it can deliver into a typical 24V system under charge.

It can handle much more panel than that, providing they're strung optimally.

There's a calculator: https://mppt.victronenergy.com/ but if you tell us the Voc and Isc of your panels we can get close without it.

In short, you won't have any issue with your panels on that mppt, and can even exceed the W if you're careful.



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lilboy509 avatar image
lilboy509 answered ·

Thank you @JohnC for your answer.

As your requested my Voc is: 49.55 and my Isc is:10.59


Regards.

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JohnC answered ·

With that Voc, safest to string them in series pairs, then parallel the 3 strings. (2S3P).

Your Isc will then be 3x 10.59 = 31.77A. Your unit is rated 70 Isc, so you could go 2S6P if you ever expanded, and still be safe.

You'd do exactly the same with your panels if your mppt was charging 12V or 48V batts. You'll be fine.
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