I have two 100W panels wired in parallel to an MPPT 75/15 controller. I have gone through the whole basic list of why my output is low and done what I can to ensure a clean set up. I have full sun on both panels. I have a battery voltage level of between 12.0 and 12.7V and can load it up to keep the voltage fairly steady. I am in Bulk charge mode. I am seeing no more than 1.1A being delivered into the battery system. Looking at the history on the controller I have never gotten more than 17W out of the panels.
I suspect that the reading out of the MPPT is off by a factor of 10. I have shut the system down at the breaker and can see a nominal draw of 8A from the battery (-8A on the BMV 700). When I turn the system back on, it shows 1A out of the MPPT controller, but the BMV bounces up to about +1.5A. The controller is less than a year old (we took delivery in July, 5 months ago) How do I troubleshoot this?
