We have factory installed panels on our NuCamp trailer with an MPPT 75/10 controller. App says 15v 0a. Lifetime output is 0w. Wiring all looks good, but battery dies and 0w obviously means no current is being generated. Ideas?
asked
New unit MPPT 75/10 no output
Is it actually seeing the battery voltage? If its dark and there is no solar input, does it still say 15v?
Voltage goes down as it gets dark. Voltage readings for both panels and battery look right and battery is working properly - lights, fans, etc., but battery draw on the app always reads 0a as well. 
To me this says there is logically no battery connected to the MPPT (either because of wiring issues or a blown fuse). When the suns up the battery output on the MPPT sits at the 14.4 float. When the sun goes down, the MPPT output tracks the solar voltage until it drops so low the MPPT goes off.
(you can also prove this to yourself by disconnecting the solar during the day. The MPPT will stay on if its connected to a battery, if its not it will go off. The MPPT will hapilly boot and monitor battery voltage with no solar input)
Did you checked the fuse right next to the connection terminals?
Your 2nd picture (the one with the history) indicates that the MPPt don't have a connection to the battery.
(highest battery voltage = absorption voltage and lowest voltage is 0V)
Hello Tatlocks,
It will help to know what voltage you're battery bank is operating on. You can start by checking the open circuit voltage of the panels at the solar charge controller to make sure something is being sent to the SCC. If you have voltage there, and it is higher than your battery bank voltage (for instance, if your battery bank is 24V or higher, 15V at the SCC will not activate it to charge) then you can move to checking the settings on the SCC itself.
Lots of possibilities!
Unit is now wired directly to the battery. Nothi g happening still. Bad controller unit?
Also it says "float" so try puttimg a load on via direct on the battery (something not too intense) and also via the direct out on the MPPT when there is sun on your PV's.
Once my small system reaches float is often looks similar if fhe batteries are in float and healthy, the PV amps read 0 too.
IE the PV's are only maintaining the "float"
@TrinasGarden The Problem is already solved, it was a blown fuse at the MPPT.
