panel wiring

ws9876

 For 1 panel ,12v charging 300 watt panel ,only putting out about 25-28 volts,,KID controller.... I have a 15 ft run from panel to jct box using 12 ga metal jacket romex,then I want to use available 14 ga romex for 25 ft to KID. Just for 1 panel.

Any reason I cant do that?

mvas

Is this your plan  ?
300 Watt PV Panel <=> 15ft of 12 awg <=> J-Box <=> 25ft of 14 awg <=> KID Controller 

Yes, it can be done.
Have you calculated the Voltage Drop?

ws9876

It isnt really an issue ...just a simple 12 v battery

ws9876

I am just making use of a damaged panel...