If you've built a site into an underbed truck box (instead of a typical IP65/NEMA4 box), I'd be very curious to see photos. Have seen some examples already on the WISP Pics facebook group, but curious what people are doing to customize them internally.
https://www.tractorsupply.com/tsc/product/tractor-supply-co-underbed-truck-box-24-in https://www.tractorsupply.com/tsc/product/tractor-supply-co-underbed-truck-box-36-in-black?cm_vc=IOPDP1
