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abefroman avatar image
abefroman asked

Max output current limited by MPPT Calculator Recommendation

When using the online MPPT calculator the recommended charge controller is the 100/20. It indicates the Max output current will be limited at low temps. I ran the same setup in the Excel calculator, and see that the potential Max current is 27.6A with a 100/30 MPPT. Is there a reason why the online calculator is recommending a 100/20? Should I go with that over the 100/30? It's shown below, but for reference I'm using 2 Newpowa 150W panels in series.

Thanks!



screen-shot-2020-11-04-at-51317-pm.png


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MPPT Controllers
screen-shot-2020-11-04-at-51317-pm.png (182.1 KiB)
screen-shot-2020-11-04-at-51434-pm.png (382.9 KiB)
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1 Answer
Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

To get the maximum out of the panels you should use the 100/30. I don't know why the online calculator always recommend a to small MPPT but I already forwarded it to the devs.

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