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  • Power Optimization  



    #Micro inverters and power optimizers:-

    During solar power harvesting process the electrical power obtained from the solar panels and juiced down in large amount to banks of energy storage (batteries) or used on conventional loads has to be voltage and frequency mitigated in order to obtain maximum efficiency. The process of mitigating the PV electrical power it is done using power optimizer, power conditioners, power controllers and power regulators.

    #The common benefit using either a power optimizer or a microinverter:-

    They are both individual mounted under a module and they do leverage the control at module level and both are eliminating the Christmas Tree Effect allowing modules to be parallel connected and in this way when one it is invalidated the rest of them are working full steam improving  PV plant efficiency.

    Microinverters have several advantages over conventional inverters. The main advantage is that small amounts of shading, debris or snow lines on any one solar module, or even a complete module failure, do not disproportionately reduce the output of the entire array. Each microinverter harvests optimum power by performing maximum power point tracking (MPPT) for its connected module. Simplicity in system design, lower amperage wires, simplified stock management, and added safety are other factors introduced with the microinverter solution. More importantly, a microinverter attached to a single panel allows it to isolate and tune the output of that panel.

    A type of technology similar to a microinverter is a power optimizer which also does at panel-level maximum power point tracking, but does not convert to AC per module.

    #The difference between a micro inverter and a power optimizer:-

    PV Panel Microinverters Circuit Connection

    Fig.1 - PV Panel Microinverters Circuit Connection

    Power Optimizers Circuit Connection

    Fig.2 - String Inverter and Panel Power Optimizers Circuit Connection.

    Fig 1 - A micro inverter is mounted under a solar panel (or solar module) performing the role of a string at the panel level. A micro inverter receives DC power from that panel and moves that along the home runs as alternative electric power direct underneath the PV panel where it is mounted. A micro inverter takes care to get the max possible power out of that panel through MPPT optimization performed at the panel level.


    Fig 2 - A power optimizer is a DC to DC power conditioner working by strictly following the IV curve for that specific module where it was attached to. In this way, it extracts maximum electric power from the PV panel during the period of time when the module is operating in conditions less optimal caused by shades and soiling. A power optimizer it is able to recover over 50% of PV panel power lost. A power optimizer works complementary to a string inverter increasing site MPPT performances and allowing a string inverter mounted on the DC side, downstream from the power optimizers  to improve the system by adding protections on DC and AC side, general communication functions and battery bank charger capability.

    The information posted herein has been compiled by Clean Energy Brands from OEM product data and reputable publications. All rights reserved!




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