Introduction: 100W Solar Flyback Grid-Tie Inverter (Part2)

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As promised, for part 2 I have replaced the DC power supply with a 265W Solar panel to showcase the MPPT capability. I have two 265Watt panels on the roof of my house. For the demo, only one 265Watt panel is used.

Step 1: MPPT Implementation

There are many methods to accomplish Maximum Power Point Tracking (MMPT). See the attached MPPT Methods.pdf. My implementation uses the Pertrurb & Observemethod. This method continuously controls the solar panel voltage in the direction of increasing DC Solar input power by perturbing the PV voltage and observing the DC Solar input power. The power output is limited to 100 Watts, therefore, MPPT only happens below 100 Watts.

Also attached is the latest Arduino code.

Attachments