Looks like you have your issue solved.
Quote:
Originally Posted by 3rd_gear_Ted
The newer panels have an inverter on each panel.
Get a clamp on AC amp meter to check each panels output.
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Not as common as you think. The cost for the install is much higher for microinverters than a string inverter. You are running a split phase line at 220-240VAC from panel to panel instead of just using the solar panel connectors to run a single line typically at 600VDC-1000VDC.
If you have shading issues, or anything that can cause a single panel to drop out, microinverters are better. If you have a battery-based system, DC charge controllers are much better. The "optimizer" thing never made much sense to me.