Just had an anxiety attack after seeing your breakers.
Post pic on https://diysolarforum.com/
Solar panels are high voltage DC. Needs a DC breaker (not AC) with higher voltage rating. Yours will probably arc weld it self closed. Possible fire hazard. note: DC is used for arc welding.
Avoid cheap knock off breakers from Amazon. Lots of info on the forum about that. I had a better Bussman 60A one, but did not like power (voltage) loss. I use ANL fuse now for SC to battery.
There are fuses in MC4 body.