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Kraufty I'vedone more testing on days with no cloud and full summer days here in South africa and the results are still poor. I've fitted two independent systems, both consist of two 345Wp - 33.7Vmp - 10.2Imp PV panels in parallel but only measured just over 160W into the grid from each of them. Both measure about 28Vin at 7A which is nowhere near the MPPT power. If you have any suggestion I'd be most gratefull.

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Kraufty Evenat this very low power the fans run almost all the time even though the inverters are only about 30°C

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Kraufty Itested the same panels in the same configuration with the same sun but with an ePever 3210 MPPT controller and measures 485W, more than 3x the wattage. As both my GTI systems are performing the same. I can only imagine that the MPPT software is terrible in these units.

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