Your converter has been upgraded at some point but clearly not a multi stage if you care about that and you should if you carry batteries. Might be an old Todd, hard to tell from the pic. Tom is correct that you need to upgrade that fuse board, at least I would if it were mine. What I don't agree with is Gel batteries, they are harder to charge. He might have meant AGM which is fine. Good luck.
Randy...Converters, Inverters, Trimetric, Surge Protectors, Zamp, Smartplug, AGM Batts