PD9260C Converter Staying in Normal Charge Mode

Thread Summary

Summarized on: May 21, 2026

Original Member Title: PD9260C Charger No Longer Working Correctly?

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A member with a 2015 Forest River Forester MBS questioned whether an older PD9260C converter was failing because it stayed around 13.6V to 13.8V on shore power, did not show the expected 14.4V boost when first plugged in, and did not appear to drop to about 13.2V storage mode during winter storage. Several members said 13.6V to 13.8V can be normal when batteries are already charged, suggested verifying measurements with the battery rested and disconnected, and noted that the converter may...

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May 15, 2026

#21

BillyThib

Advanced Member

bilmet01 said:
Hello. I have a PD9260C converter that I believe was originally installed in my 2015 Forest River Forester MBS. I have noticed since beginning of last fall time frame that it is putting out only "normal mode" charging ( 13.6V-13.8V ) no matter how long I am hooked up to shore power. Also, I have not seen any 14.4 volt charging when first pugged into shore power either like I used to see ( only when running generator or engine ). I had monitored during winter storage with RV plugged into shore power and was never seeing drop down to "storage" mode ( ~13.2V ) so I continually disconnected / connected shore power ( using in house switch ) to avoid any chance of over charging batteries to much.

So my question is is this a sign that my converter is on the way out and that I should think about installing the latest PD9360V model from Progressive Dynamics? Also, since I will be start camping soon including a 3 week trip with campground hookups ( in between 14.4 charging while engine is running ) do I need to be concerned that continual 13.8V charging at campground will hurt my ~4 yr old AGM batteries?

If my memory is correct, the PD converters use a pair of fuse on the DC output, make sure that they are not blown.