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Old 01-14-2021, 10:17 PM   #1
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Default DC lights flickering when on shore power.

I have a 98C200V with the old Magnetek 6345 converter/power center. It works well, however, my dc light bulbs all flicker/pulsate when the ac charger is on. I am planning to replace the guts eventually, maybe sooner rather than later. It drives me nuts, like a strobe light. Anything I can do about this?
They are LED bulbs in the original fixtures...
Thanks!
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Old 01-15-2021, 01:03 PM   #2
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I had problems with the first round of LED bulbs. What I found out is that they were rated for 12 volts. When the charger is running the system has more than 12 volts. I found bulbs that had a voltage range, I think something like 8 to 16 volts. These worked fine.

In your case it's also possible that the charger/converter could be an issue as the original unit introduces unfiltered DC current. That might be an issue with LED's.

I would make it a high priority to install a modern charger/converter. I used a Progressive Dynamics PD4645. Not crazy money, relatively easy to install, decent charge profiles(though not the best*) and assembled in the USA. The battery in my RT when I sold it was a group 29DC from Wally World, the Maxx version. After 2.5 years of use it was still performing well using the PD4645 and solar, boondocking about 4 months per year.


*The best($$$) chargers entail using tail current for charging control.
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Old 01-15-2021, 02:36 PM   #3
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I'd put a voltmeter on and see what voltage is being provided to the DC circuits- and see if anything is loading the circuit in a cyclical pattern, drawing the voltage down



so is it the dc power provided?


or a device drawing power?


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Old 01-15-2021, 02:44 PM   #4
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Seems to be just the led bulbs in the old fixtures. Most have been replaced already with LED fixtures. They all work just fine. I ordered a PD 4645 after posting this last night.
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Old 01-15-2021, 02:56 PM   #5
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Check the quality of your grounds. I had a similar problem when our Espar was starting up (a high-current situation). Improving the Espar's ground fixed 99% of the problem.
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Old 01-21-2021, 06:19 PM   #6
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I current have the same issue on a 99P190. Flickering stops with high enough load on the battery. DVM shows a very high AC voltage riding on the DC, about 12V. I have not yet fixed it, but am assuming one of the rectifying diodes in the Magnetek has shorted.
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Old 01-21-2021, 07:46 PM   #7
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Disconnect shore power, turn.your battery switch on before.pluggimg back into shore power. That should stop.the flickering.
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Old 01-21-2021, 09:09 PM   #8
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Problem solved. Put the PD6445V converter in. Works great!
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