SLYT855 May   2024 AFE88101 , DAC161S997 , DAC8551 , LM74610-Q1 , TVS3301

 

  1.   1
  2. 1Introduction
  3. 2What is a solar power optimizer?
  4. 3Output bypass function of a solar power optimizer
  5. 4Output bypass circuit solutions
  6. 5A scalable bypass switch solution using a low-voltage ideal diode controller
  7. 6Working principle of LM74610-Q1 reverse-voltage range extension
  8. 7Conclusion
  9. 8Additional resources

3 Output bypass function of a solar power optimizer

For high-power solar inverters, connecting multiple PV panels in series achieves a high DC input voltage going into the inverter input. Deploying the optimizers to the corresponding PV panels obtains the highest efficiency, as shown in Figure 2. The PV string is actually connected by the outputs of the optimizer. If any one of the solar panels fails, then the PV string voltage can collapse, as all of the PV panels are connected in series. An output bypass circuit provides a parallel path to the string current around the damaged optimizer. Figure 2 shows how the bypass function works when one of the PV panels breaks.

Output bypass junction of a solar power optimizer. Figure 2 Output bypass junction of a solar power optimizer.