I was rushing to get my wife out the door so she could go camping with her daughter after I finished wiring the new trailer brakes and I realized that my three-year-old 105 amp hour AGM battery had died and the 12 volt items weren't working except on shore power. I assumed that it was a converter issue, but didn't have enough time to chase it down. I replaced the battery and sent her out the door. The battery probably didn't need to be changed, but we're heading to AK this summer and I decided to be conservative.
Upon her return I followed the Progressive Dynamics troubleshooting instructions for the converter and realized that it passed the test. The battery wasn't charging, but I finally clued in that the DC bus in the PD 4045 wasn't getting power from the battery. I had installed an in-line fuse holder with a 30-amp fuse when I built the camper. The fuse was good, but the actual fuse holder was bad and no longer allowed current to pass through it! I removed the in-line fuse for now and the system works great.
Question: Do I even need an in-line fuse between the battery and the PD-4045?