I just had an issue where I lost DC power to the main DC switch panel in my 2013 45DS one week after launching. I found that I still had a connection to the charger/ inverter so it reported the battery bank voltage and could generate AC power with the inverter. I also discovered that the bow thruster worked. I naturally went looking for fuse connected to the battery bank and found a nice big 300A fuse under a clear cover in the battery compartment. It was a traditional link fuse and was unbroken. I could not find any other fuses between the batteries and the DC panel.
That night I located wiring diagrams on the Marlow-Hunter website here: https://www.marlow-hunter.com/wp-content/export/ (the link provided in the Ask a Hunter Owner Forum is broken). There were two battery circuit diagrams that indicated that there were indeed 3 fuses located in different locations depending, I assume, on the model year. The fuse I found was only for the bow thruster. After over an hour of searching for the same type of link fuse in all the locations on the diagrams, removing the switch panel and wall section underneath, I noticed that there were two white squares under two of the three positive cable connections to the terminal block in the battery compartment. There was a label on the side identifying it as a 300A Bus fuse. I had never seen a terminal fuse before. There was corrosion on the top of the fuse under the cable connector which probably resulted in a poor connection and not an over current condition. I imagine there are several Hunter models that use this fusing technique so I thought this post would be helpful to others troubleshooting a DC issue on their boat.
That night I located wiring diagrams on the Marlow-Hunter website here: https://www.marlow-hunter.com/wp-content/export/ (the link provided in the Ask a Hunter Owner Forum is broken). There were two battery circuit diagrams that indicated that there were indeed 3 fuses located in different locations depending, I assume, on the model year. The fuse I found was only for the bow thruster. After over an hour of searching for the same type of link fuse in all the locations on the diagrams, removing the switch panel and wall section underneath, I noticed that there were two white squares under two of the three positive cable connections to the terminal block in the battery compartment. There was a label on the side identifying it as a 300A Bus fuse. I had never seen a terminal fuse before. There was corrosion on the top of the fuse under the cable connector which probably resulted in a poor connection and not an over current condition. I imagine there are several Hunter models that use this fusing technique so I thought this post would be helpful to others troubleshooting a DC issue on their boat.
