dsinned wrote:I suggested NUMEROUS times that they incorporate a calculated "efficiency" column in the listing of microinverters. This could simply reveal an average value (percentage) of output power to input power in watts, updated daily, hourly or upon command. This is really all ENLIGHTEN MANAGER needs for monitoring purposes to "flag" deficiencies of individual inverters. As far as I'm concerned, the means to monitor the measured average conversion efficiency of a micro inverter (typically spec'd 95% or greater) is paramount to the "health" of same. When an inverter falls well below this spec (say 85% or less) and remains that way over time, the end user should receive an "alert" of any such inverters failing to perform to spec. Of course, Enlighten Manager users can do this for themselves, but it is a rather tedious and time consuming data retrieval process to do all the calculations for each inverter especially in a large array, when the Enlighten software could easily automate and report the results for the system owner or Installer or leasing company. Of course, this will never happen because such a "feature" would expose Enphase to countless customer inquiries, potentially resulting in warranty claims (especially with respect to M190s).
There is a feature in Enphase where you can download the last 7 days of data {Date/Time, AC Voltage(V), AC Frequency (Hz), DC Voltage (V), DC Current (A), Temperature (?C), Power Produced (W)} which you are probably familiar with but it has to be done panel by panel and several steps to get that data to download. The data isn't always sampled at same time so the AC power to DC power can be different when the power level is changing. My calculations using those numbers are okay when the power level is changing slowly from 5 minute intervals. A graphical view can also be created by clicking on the panel you want to graph while in power mode.