Airstream places fuses AT THE PANELS! They are located within the black junction box that is bonded to the underside of each panel. The ones I have removed had a green fuse holder with an ATO fuse and IIRC, was 10 amps.
yes, you WILL have to remove the panels to access these fuses.
They also have an inline fuse on the meager charge line, which I have seen reduced from 10AWG to 14 or 16AWG. Have no idea why they do that, as it's just as easy to splice the proper sized wire onto the output lead that's bonded into the solar charge controller.
Look for that one between the charge controller and the positive bus bar.
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries