DODGE SPRINTER 2500 CONVERTED TO RECREATIONAL VEHICLE BY WINNEBAGO (2010 WINNEBAGO ERA). ON MAY 11, 2018 AFTER DRIVING FOR ~4 HOURS, PARKED IN CAMPSITE. IMMEDIATELY CAUGHT FIRE UNDER DRIVER'S SIDE FLOOR IN BATTERY COMPARTMENT. FIRE SPREAD UNDER DASH, UNABLE TO EXTINGUISH WITH ONBOARD FIRE EXTINGUISHER. FIRE DEPARTMENT EXTINGUISHED BLAZE AFTER ENTIRE DASH MELTED.