Zwy
Emperor Of Solar
I would use the IMO, I'm not a huge fan of MC4's mixed from different manufacturers. Too many differences for a good connection and over time the connection can fail with mismatched parts. Between panels where it's a string in series is OK because all the panels would have the same MC4. It is when you make the connections at the string positive and negative where a problem can occur. There is not a standard the connectors are manufactured to.
As for how to run the conduit, I always prefer gravity to shed water so I would probably have a 180 degree bend from above to enter and and exit on the bottom. If you do not have that option, then you can use a Myers hub fitting like I have at the top of the box in this photo with a threaded pvc fitting. The Myers hub will have an oring on the face for sealing purposes. https://www.grainger.com/product/52...I8f286J0LZ5F_m7PrLcaAkumEALw_wcB&gclsrc=aw.ds

As for how to run the conduit, I always prefer gravity to shed water so I would probably have a 180 degree bend from above to enter and and exit on the bottom. If you do not have that option, then you can use a Myers hub fitting like I have at the top of the box in this photo with a threaded pvc fitting. The Myers hub will have an oring on the face for sealing purposes. https://www.grainger.com/product/52...I8f286J0LZ5F_m7PrLcaAkumEALw_wcB&gclsrc=aw.ds
