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Running solar cable through an RV roof without a dedicated entry point usually means extra sealant and a higher chance of a slow leak down the road. This Go Power! cable entry plate is built specifically for MC4 connectors, with the waterproof glands already installed and torqued to spec.
For anyone routing MC4 cables from a roof-mounted panel into the RV, this plate is a cleaner and more weathertight option than drilling a bare hole.