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The troubleshooting guide in the user manual describes my problem perfectly:
Symptom:
Classic switches between Resting and Bulk MPPT repeatedly but produces 0 watts.
Solution:
Watch the IN voltage and see if it slowly drops to battery voltage (Or Close) when the Classic goes to Bulk MPPT if so this is usually a sign of a High resistance connection (Loose Connection between the Classic and DC source)
The problem is that my wiring is secure, and I even ran a 2nd connection through the front door of the house temporarily with the same results. I have 2 Classic 200 CCs hooked up, so I have been able to try both and verify that the problem is not in the CC.
There is an MPV-12 250 installed where I have 6 strings with 4 panels each (Abound Solar AB1-70 70W thin film). All 6 strings are wired into the combiner box and from there I have 10AWG wire running about 30ft (60ft round trip) to the Classic 200 (positive has a 20A breaker inline near the CC). That is 1/2 of the system, I will be hooking up an identical configuration to the 2nd Classic 200 next week. If I shut off all but one string (doesn't matter which string), then I still get the same voltage drop as I do when all strings are active, so I belive that elliminates any potential wiring issues on the roof (string side of the combiner box), which would isolate the "loose connection" to the wiring running from the combiner box to the CC...but I've triple checked it and it seems just fine...so I'm a bit stumped.
Symptom:
Classic switches between Resting and Bulk MPPT repeatedly but produces 0 watts.
Solution:
Watch the IN voltage and see if it slowly drops to battery voltage (Or Close) when the Classic goes to Bulk MPPT if so this is usually a sign of a High resistance connection (Loose Connection between the Classic and DC source)
The problem is that my wiring is secure, and I even ran a 2nd connection through the front door of the house temporarily with the same results. I have 2 Classic 200 CCs hooked up, so I have been able to try both and verify that the problem is not in the CC.
There is an MPV-12 250 installed where I have 6 strings with 4 panels each (Abound Solar AB1-70 70W thin film). All 6 strings are wired into the combiner box and from there I have 10AWG wire running about 30ft (60ft round trip) to the Classic 200 (positive has a 20A breaker inline near the CC). That is 1/2 of the system, I will be hooking up an identical configuration to the 2nd Classic 200 next week. If I shut off all but one string (doesn't matter which string), then I still get the same voltage drop as I do when all strings are active, so I belive that elliminates any potential wiring issues on the roof (string side of the combiner box), which would isolate the "loose connection" to the wiring running from the combiner box to the CC...but I've triple checked it and it seems just fine...so I'm a bit stumped.
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