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Cstoliker's avatar
Cstoliker
Explorer
Aug 13, 2013

parallax power supply 7345ru parts PWM

My 7345 is not charging the coach batteries but does supply 12power to all accessories. The transformer, fan and relays work fine.
Think i need a PWM circuit for it. Contacted PP tec support and they seamed more interested in selling me an upgraded replacement unit rather then parts to fix this one. Anyone know of a way to get a PWM for this? (Charging controller)
It's a retrofit from an original Magnetek 6345 wich was serviceable. Parts were available and the schematic is even available online. Unfortunately the 7345RU has non of theses things except for a "flow chart" and "installation instructions".

Or even if someone know enough about these to tell me how bypass the PWM and get full output to batteries. I'm not going to leave it plugged in but I'd be nice to be able to charge my batteries in a couple hours running off generator..

126 Replies

  • Did you replace the fuse panel? This unit doesn't have a separate charging circuit, and if it is putting out 13.6 volts, it is fine. There are no relays in it.
  • Pretend you don't have that converter anymore, and just set this one (ebay 9245) along side it, or wherever, plug in the ac cord, connect pos & neg to battery, or same place the existing one is connected.
    There, its done, at 1/2 the price, and 5 times the charging speed (w pendant optional)

  • I,ve got a used one on the shelf, replaced it with the one shown. things work much better now.
  • Tempting but for that price I could just replace the entire 7345ru or get a 45 amp 12v charger and plug it into an outlet.
  • You and your battery would be much happier with a new 3 stage unit.
    Just a thought.