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If there is voltage on the DC (PV panel) side and you see 240AC on the output side, I would use a clamp-on ammeter to check both sides if there is current flowing. If yes, the display board is dead but the unit is working. In my recent work with the Sunny Island and Sunny Boy units, it seems that it takes a few minutes for the units to start operating after turning them on.
If you want to upgrade your system, just try to get similar looking solar panels and keep what you have. No need to rip them out. And you can mix a string inverter with micro-inverters.
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
Last edited by red-beard; 06-01-2017 at 03:52 AM..
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