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A-Star, it is interesting to note from your chart that your two panels, presumbaly "same make" purchase at the same time? show about a 10% difference in output.
"It has a good comparison between the MPPT charge Controller and the simpler PWM controller (like the C30 from Xantrex)." A fast read of the C30 manual indicates it is not a PWM controller at all, but simply a RELAY, that connects/disconnects the solar panels automatically. Or did I misread that?
From what I've seen so far, no MPPT controller will actually give a 30% gain in and of itself--it looks like the gain is more on the order of 10%+ from the MPPT controller, and another 10-20% comes from the PWM power, regardless of whether that comes from an MPPT controller or an alternator or other device. Which reminds me, to call JCI and ask about PWM and batteries.
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