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Old 10-24-2020, 11:34 AM   #1
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Tank Heater/Converter question

My wife and I are living in our 5th Wheel while our new home is being completed. I have taken all precautions for keeping things warm and running. Our unit is 2 years old and has two large 6 volt batteries and the standard 55 Amp WFCO WF-9855 Converter. We are plugged into 50 amp shore service. I have noticed that under normal conditions the panel shows 13-13.5 amps charging when plugged into shore power. When I turn on the Tank Heaters this drops to 12.7 or so amps. Is this converter going bad?
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Old 10-24-2020, 01:29 PM   #2
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I'd suspect too small wiring, or a loose connection between the converter and batteries. I'd start by checking all the wiring connections.
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Old 10-24-2020, 01:53 PM   #3
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My Silverback has 4 tank heaters OEM installed. (fresh, 2 grey, 1 black) Each heater draws about 5 amps, so 4 would draw about 20 amps. I'd guess if you have what I have ... loosing 1/2 - 3/4 charging amps would be about normal. But again, I'm just guessing.
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Old 10-24-2020, 03:11 PM   #4
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That makes sense. I will check connections also. I guess if a full battery is 12.75 volts then if the converter stays at or above that while powering all four heaters then it is working correctly.
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