Author Topic: midnite 150 solar charge controller  (Read 71 times)


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midnite 150 solar charge controller
« on: October 25, 2020, 05:27:56 PM »
I would like wiring info for midnite 150 controlling a zephyr 48 volt battery vent fan.


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Re: midnite 150 solar charge controller
« Reply #1 on: October 25, 2020, 10:21:05 PM »
You would use the AUX contact from the Classic to a relay of some sort - SSR solid state or a mechanical one.  You need to make sure the contacts in the Classic are set properly - there are jumpers inside the Classic and info is in the manual.  You will use the 12v output of the AUX in Classic to run the relay , and the relay contacts will then switch on and off the 48v source voltage to your fan. The Classic has AUX  Ventilation fan settings on the MNGP or the Local Status App and there are other logic ways to control the fan if you want. If you are using a Whizbang you will need to use AUX 1 since AUX 2 is used by the Whizbang.  One final thing is that if your relay doesn't have it built in ,  you will want to consider a flyback snubber ( usually diode) to keep the relay from burning out.

system one
Classic 150 , 5s4p  Kyocera 135watt , 12s Soneil 2v 540amp lead crystal for 24v pack , Outback 3524 inverter
system two
Classic 150 ,5s 135 watt Kyocero , 16s Calb 100AH LiFePO4 , Outback VFX 3648 inverter
system three
Midnite KID MPPT 24 DC in to  12 volt AGM batterie