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Solar Combiner for 4x9 to 2 MPPT


RobertBr
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Any advice on the size/type of solar combiners I’m installing 4x9 325w panels with a 8kw SunSynk inverter. 

2x9 panels will be on one roof, the other 2x9 on another roof that gets a bit of shade after 2:30. The roofs are about 10 M apart, should install 2 separate combiner boxes one on each roof or just have a MC4 y join and install 1 solar combiner with surge protection near the inverter?

the inverter has 2 MPPT rated at 18A 450V each. I was also thinking it’s a good idea to put in DC isolators near the inverter in case we want to turn off one set of panels. 

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