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DblDuce4Me's avatar
DblDuce4Me
Explorer
Aug 19, 2017

Magnatek 6336 replacement

I was reading about upgrading power converters. I have a 1990 Granville Debonair class C with a 6336 Magnatek converter in it. It works fine, but am worried about the "boiling battery" snydrome ive been reading about if you leave it plugged into shore power too long. My question is, can i just get a replacement 35 or 45 amp converter like a PowerMax or Progressive Dynamics and plug it in to replace the existing one, or do i need to go with an upgrade kit that has the dc distribution/fuse board as well? My fuses are the newer plastic spade type, and not the glass fuse type. Just wondering if I need to replace this fuse board. Most of the ones I see listed come with an AC plug but dont mention anything about an updated fuse board to also install at the same time. Can someone give me some advice as to what would be an appropriate model to update my converter to? thanks!
Class C
  • SidecarFlip's avatar
    SidecarFlip
    Explorer III
    Aug 19, 2017
    Give PD a call (phone number is listed on their website) and ask them. Nice folks.
  • tenbear's avatar
    tenbear
    Explorer
    Aug 19, 2017
    I replaced my OEM converter with a Progressive Dynamics 9270 converter. Although my RV is substantially newer than yours, it is still not a modern RV. The only change that I made when I replaced the converter was to replace the converter to battery wire with a much heavier wire, #4 replacing the old #8 wire. The new converter now starts charging in the 40 amp range instead of the 5 or so amps the old converter charged at. The main reason for changing the wire was to reduce the voltage drop.

    There is no reason to replace the DC distribution/fuse board if it is still working well. The question is can the old circuitry handle the higher charging current. It probably can since the discharge current has always been higher than the charging current.

    Good luck with your project.
  • pnichols's avatar
    pnichols
    Explorer II
    Aug 20, 2017
    A. It depends upon what the specificaitons are of the RV batteries that you plan to use with the replacement.
    Some RV batteries specify to be floated at 13.5 volts to 13.8 volts. A lot of common 3-stage and 4-stage RV converter-chargers use 13.2 volts as their floating voltage. So be aware of all this when you replace your 6336.

    B. Another consideration is if you plan on sometimes powering a new converter-charger with a generator during drycamping, make sure that the generator is large enough wattage capacity so as to be able to fully power whatever size converter-charger you get at whatever amps it will try to deliver to your RV batteries at the occasional times when they may have been discharged down a lot.

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