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Each MPPT will be tested individually. They will be isolated, then then attached to an E-load to draw constant current . A 240 Watt LED bulb will be shone to imitate sunlight on a cloudy day or in the nighttime testing.
The following table should outline results from varying the E-load and intensity of the sunlight.
| Light Source | E-Load Setting | Measured Voltage input | Measured Voltage Output | Measured Current |
|---|---|---|---|---|
| Sunlight | ||||
String Testing of MPPTs
Each MPPT once unit tested, will be tested in series for the total array output power, and continuity. Like unit testing, this will be run for at least half an hour for full validation.
SPI Communication Testing of MPPTs
After obtaining a SPI logic analyzer, we will record the SPI messages given by the SPV1020 MPPT IC.