Can anyone who's installed solar panels help me understand what you get with the "Prewire for Solar with Roofmount MC4 Connector (not required if solar panel option selected) +$200.00" option? I plan on adding solar later on a 21 NE, and need to determine if I should order this option or just start from scratch. Is the issue that it's hard to run the wire to the roof later? Thank You!