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Testing Results
TEST SETUP:
(It was a lot brighter than the image shows. Each lamp is a 500W halogen lamp, for 2000W total)
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2 Panels, 2 MPPTs, Series
| Condition | Vmpp (V) | Impp (A) | Pmpp (W) | MPPT Power Loss | MPPT Efficiency |
|---|---|---|---|---|---|
| Panel Only | 15.028 | 0.829 | 12.452 | ||
| Panel With MPPT | 14.638 | 0.802 | 11.739 | 0.713 | 94.3% |
| 2 Parallel | 17.727 | 0.732 | 12.982 | ||
| 2 Series | 30.648 | 0.44 | 13.477 |
Note Notes - there was 'a little' more light for the 2 panel tests since the ambient lights were on both panels as well. During the single panel tests, all the light was concentrated on a single panel, thus giving higher per-panel output in the single panel tests.
SPI Testing
With all of our SPI testing with the power supply as the power source and not much success, I finally decided to just go for testing with the panels. And since we finally have lights that can at least give us some power, we were able to test it.
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At this point, I don't see what we could have done wrong during FSGP 2019 except for some weird wiring error that was never caught, and I'm starting to think more and more that this was actually the issue.
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