MC4 cables passthough cinderblock wall recommendations?

[LittleLebowski]

What's the best way to do this with regards to sealing it up, etc? I've already got the tools.

 

[Northernchateau]

I used one of these to bring cables thru the wall and it worked great

https://www.amazon.com/gp/product/B07SVL5D3T/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

 

[BartHenry]

use a conduit pull elbow with a short stub of conduit. (assuming you ran your pv wires in conduit up to this point, just use the same size). epoxy the stub in place.

EDIT: the stub should be long enough to pass through the wall and still be able to fit a pull elbow on each side.