I'm troubleshooting the solar aspect of a small offgrid 120v outback system and need some opinions. The customer was complaining that the generator was running too much so I went out to their property and investigated. The solar array consists of 16 total panels (4 strings of 4). At the combiner box, I took the voltage and amperage reading of each string and found the following......BREAKER 1 (85VDC/8.87A) BREAKER 2 (84.5VDC/8.9A) BREAKER 3 (.03VDC/0A) BREAKER 4(85VDC/8.89A). Breaker 3 string was not producing and so I did a fix and then read (87.1VDC/8.43A). After reviewing the online monitor since that fix from a few days prior I'm realizing that the first day after had 4.5KWH production, second day had 0.7KWH production, and yesterday had 0.3KWH production.....sun has been out without clouds. The 60A Outback charge controller shows there is PV voltage, but noticed it was in "silent mode" a good amount of time. Charge controller is old, but all the other equipment was updated about a year and a half ago. I was wondering if there is a way to diagnose if the charge controller is bad without just replacing it and what does it mean when it's in "silent mode". Another side note is that their generator threw an AGS fault code on the MATE3 controller and found that the generator has problems so I ended up turning from "auto" to "off" -- Jim with Gowdy Electric Cambria, Ca 93428 business 805 927 2630 cell 805 975 5279
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