Power Electronics in PV Systems

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The solar PV market is experiencing rapid technological change due to the growing influence of module integrated electronics. This can take a number of different forms

  • Detached micro-inverters and DC optimizers (attached to racking)pow fig 1
  • Micro-inverters/DC optimizers attached to PV module frame
  • Micro-inverters/DC optimizers integrated onto PV module back-sheet

All these new approaches have technical and business advantages and disadvantages, and they all compete with traditional centralized string inverters. In addition, each technology has a different value proposition depending on the market: residential, small commercial, large commercial and utility scale. The advantages claimed by these solutions include:

  • Differentiated product offering
  • Significant LCOE reduction, up to 20%
  • Incremental revenue
  • Increase market size by addressing new markets
  • Increase system safety and faster installation inspector approvals

To help PV module companies, that may not be familiar with this new technology, or have the resources in place to perform a thorough evaluation, DfR Solutions offers a range of capabilities to help them make the best choice for their target market, and to get to market in a timely fashion.


Competitive analysis: review the offerings of all the many companies developing power electronics solutions for different markets. Identify the performance and business trade-offs of each solution and identify the best solution for your business.

Power module test/evaluation: In-depth evaluation of modules with respect to:

  • Reliability
  • MPPT tracingpow fig 2
  • Solar shading performance
  • IEEE1547 compliance
  • Efficiency (CEC)
  • Snow load testing
  • Regulatory approvals
  • Energy harvest under typical operating environments

Power vendor audits: detailed audits of the vendors business organization systems:

  • Design procedures and capability
  • Quality systems
  • Order management systems
  • Return Material Processing (RMA) systems
  • Production factory on site audit