Comparison to Microinverters

Module-level electronics overcome the shortcomings of traditional inverters and enable maximum power, module-level monitoring, flexible design and enhanced safety. However, there is no need to add an inverter to every module if DC power optimizers can achieve all these benefits at lower cost, higher efficiency and higher reliability.

 

Benefits

Microinverters

SolarEdge 
Power Optimizers

Details

Cost per WHigherLower - 20-50% 
  • Microinverters cost includes trunk cables and gateways
  • SolarEdge system cost includes inverter with 12 years standard warranty (extendable to 20/25 years), built-in module-level monitoring and 25 year warranty for power optimizers

Scalability

Not Scalable

Scalable

  • The cost/watt of a SolarEdge system decreases as installation 
    size increases

Added Energy

Lower

Higher

  • Power optimizers have higher efficiency (99.5%) than microinverters
  • Reduced efficiency of microinverters increases heat dissipation 
    which enhances module degradation
  • Microinverters have a higher minimum voltage than power optimizers leading to less shade tolerance

Compatibility

Limited

Broad

  • Microinverters have a limited AC output power (e.g. minimal support for 72-cell modules)
  • When connected to higher capacity modules, the excess DC power is 
    lost. For example, in a 6kW installation of 260W modules, only 5kW AC power 
    will be produced

Reliability

 Lower

Higher

  • Microinverters have much higher part count leading to increased 
    failure rate
  • Some microinverters work with electrolytic capacitors which have 
    short life time
  • Microinverters create higher temperatures