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 th...
Forum Discussion
The drop in the 7345's output with each LED being turned is not important in itself ... it's just an indication of a less than desirable overall output stage voltage control design and performance, IMHO.
I would prefer a 7345 output stage that kept the voltage on it's output terminals very close to 13.8 volts with 45 amps flowing ... like some in this thread say that certain other RV power supplies will do.
For instance in my situation, charging of my AGM batteries would be even faster with my non-boost-voltage 7345 if it's output would, say, remain no lower than 13.7 volts when dumping 40 amps into my AGM batteries. Remember ... I'm talking about voltage right on the 7345's terminals that it's manufacturer had control of via it's design.
Keeping voltage drop (sag) low between the 7345's terminals and the batteries' terminals is a whole other situation and is completely under my control and is my responsibility to take care of. I just want the 7345 to do it's thing a bit better without me having to spend a bunch of additional $$$ to replace it.
I may have to do what MEX and Don do - use a simple single-stage high voltage charger that I already own in parallel with the 7345 in order to get some high currents dumping into the AGM batteries during the early stages of their charging. I have plenty of other things to spend our money on besides replacement of a 7345 that is supposed to be almost adequate for my wheel chair deep cycle battery bank.
I would prefer a 7345 output stage that kept the voltage on it's output terminals very close to 13.8 volts with 45 amps flowing ... like some in this thread say that certain other RV power supplies will do.
For instance in my situation, charging of my AGM batteries would be even faster with my non-boost-voltage 7345 if it's output would, say, remain no lower than 13.7 volts when dumping 40 amps into my AGM batteries. Remember ... I'm talking about voltage right on the 7345's terminals that it's manufacturer had control of via it's design.
Keeping voltage drop (sag) low between the 7345's terminals and the batteries' terminals is a whole other situation and is completely under my control and is my responsibility to take care of. I just want the 7345 to do it's thing a bit better without me having to spend a bunch of additional $$$ to replace it.
I may have to do what MEX and Don do - use a simple single-stage high voltage charger that I already own in parallel with the 7345 in order to get some high currents dumping into the AGM batteries during the early stages of their charging. I have plenty of other things to spend our money on besides replacement of a 7345 that is supposed to be almost adequate for my wheel chair deep cycle battery bank.
