Renogy DC-DC Test Results-UPDATE 4 (Better!)
Updates 23 June--new test with Renogy input exposed for voltage readings Update 25 June more readings Update 4 - 27 June-- fewer amps with fat wire were noted this time! ----- I have the 20 ampe...
Forum Discussion
I got the input voltage to go higher but AFAIK the amps are still 30 amps so input watts went up with the higher voltage if amps the same. Output is the same.
You would think that can't be right. I don't have a clamp ammeter to measure the input amps. The clamp type does not add any R to the circuit like the one I used in the test seems to.
So it is not for sure using fatter input wire to reduce voltage drop does not reduce the input amps from my results. Manual says 20 amps out means 50% higher draw (30 amps) Could be more going on than meets the eye! Whatever, mine works. :)
EDIT--I did have 12.82v input at the Renogy terminals with fat wire before, and the ammeter still said 30 amps, so now with 11.28v input, I don't imagine amps could be less than 30.
I am putting it all away again so no more access to the input terminals. I am happy with the way it is now (11.x input volts and no tapering of the 20 output amps)
You would think that can't be right. I don't have a clamp ammeter to measure the input amps. The clamp type does not add any R to the circuit like the one I used in the test seems to.
So it is not for sure using fatter input wire to reduce voltage drop does not reduce the input amps from my results. Manual says 20 amps out means 50% higher draw (30 amps) Could be more going on than meets the eye! Whatever, mine works. :)
EDIT--I did have 12.82v input at the Renogy terminals with fat wire before, and the ammeter still said 30 amps, so now with 11.28v input, I don't imagine amps could be less than 30.
I am putting it all away again so no more access to the input terminals. I am happy with the way it is now (11.x input volts and no tapering of the 20 output amps)
