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MPPTs

29-06-2023: Preliminary MPPT Testing

  • Tested one of the MPPT boards using a power supply (Sparky) and load (Rigol DL3031)

  • Load set to 25V, power supply to 2A and set to ~8V (max 15V)

  • Power output around 16W, an efficiency of ~91-92%

Conditions: cloudy, no direct sun, ~22°

  • Replaced the power supply with a large solar panel

  • Voltage around 6V and current 7.78mA

  • Load: ~25V; 0.027A; 0.6-0.7W

  • Another panel connected in series, power output increased to ~0.8W

  • When the protective layer from the larger solar panel was removed, increased power output to 0.83W-1.0W

Note: large panel (28 cells) and smaller panel (16 cells)

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