stevenwarthan@gmail.com Report post Posted November 10, 2015 Forgive as this is long - but I wanted to give the details. We are having an issue with the batteries charging. I have a 2010 Fiesta 34B, purchased used last year, been working fine through the summer trips. Keep it attached to shore power with A/C in operation. Two weeks ago I noticed the A/C short cycling (about 30-60 seconds). Went inside to find dashboard radio flickering, all 12 volt lights were dim, etc. Immediately though the the converter/charger was not working. Opened the area behind the power center to access the converter. It was difficult to tell if it was functioning. I check the output with the multi-meter and the voltage was fluctuating all over the place. I checked the cost and ordered one to be delivered that Sunday. I immediately dug out the other chargers to see if I could bring the batteries back up. I left those chargers in place for the week and they appeared to recharge fully. I replaced the charger with the new one and hooked everything back up and removed the external chargers. I also checked every in-line fuse to make sure it was still good - no issues there. I left everything off for a few hours and checked the readout on the dash. They were at 13.68 and 13.56 about 4 hours later. I turned the refrigerator on and let it sit overnight. Yesterday afternoon the voltage was still hanging close to the 13.6, 13.5 range. This afternoon I checked the voltage and both are down to the 13.1 range. While I realize the resting voltage of a 12-volt is lower than this I don't recall it dropping off this much previously while being plugged in. Am I right in thinking something is still wrong? If so, any idea where to turn next? Is there some fuse I haven't though of? I appreciate any assistance you can provide. Thanks Share this post Link to post Share on other sites
wolfe10 Report post Posted November 10, 2015 What converter do you have now? Is is a "smart" charger/3-4 stage charger? Were you measuring voltage at the house battery? Share this post Link to post Share on other sites
stevenwarthan@gmail.com Report post Posted November 11, 2015 I have the WFCO (WF-9855) 55 Amp Deck Mount Converter and replaced it with the same. It is a 3-stage charger which provides 13.2 VDC range “float” mode, 13.6 VDC range “absorption” mode, and a 14.4 VDC range “bulk” charge mode.I checked the voltage in both locations. I checked the voltage at the converter (13.23 - so looks like that is in float mode), I get 13.2 at the battery cable end. Individually the batteries are reading 13.18 and 13.19, which is consistent with the readings on the dash volt-meter. It may be working and I'm just a little over-sensitive at the moment, but I don't recall the number ever sitting that low. Share this post Link to post Share on other sites
wolfe10 Report post Posted November 11, 2015 13.2 is just fine for float voltage unless it is very cold out in which case you want it a little higher. Share this post Link to post Share on other sites
