TenagaSurya

Inverter

asSalaamu’alaykum.



954§

MICROINVERTERS

Quick Links:  M190  · D380 “TwinPack”

M190
The Enphase Microinverter shifts DC to AC conversion from a large, centralized inverter to a compact unit attached directly to each solar module in the power system.  Distributing the conversion process to each module makes the entire solar power system more productive, reliable, smarter and safer than traditional inverter systems.

Solar Power Challenges

Solar power production is affected by various factors such as module mis-match, obstruction shading, inter-row shading, and obstacles such as dust or debris.  In addition, non-uniform changes in temperature, irradiance, and shading create complex current-voltage curves, further affecting energy harvest.  This is due to the fact that in traditional systems the performance of the entire system is dictated by the performance of the weakest module.

The Enphase Solution

The Enphase Energy Microinverter System solves solar power challenges by performing Maximum Power Point Tracking (MPPT) at each solar module.  MPPT is an algorithm used to calculate and respond to temperature and light changes detected on a solar power system, and to determine how much power to draw from the module.  In contrast, centralized inverter’s MPPT algorithm sees the entire solar power system as a single module, and responds to the lowest production numbers it detects.

Increased Productivity

The Enphase MPPT algorithm works at each solar module in an installation and achieves greater than 99.6% accuracy which enables it to maximize energy harvest at all times, even during variable light conditions.  Tests show systems using Enphase Microinverters increase energy harvest by as much as 25% over systems using traditional inverters.

More Reliable

Traditional centralized inverters implementations create a single point of failure for solar power systems.  If the inverter fails, the entire system is disabled. Enphase Microinverters convert power independently at each solar module.  If one microinverter fails, the rest continue to operate as usual.  Also, if a microinverter is damaged or fails, it can be replaced during routine maintenance or when convenient, further reducing maintenance costs.

Reduced Operational Costs

With the Enphase Microinverter System, installers are no longer limited by string design, marginal designs, co-planarity, and matched modules.  The space, heat, and noise associated with a large inverter are eliminated.  Enphase Microinverter Systems improve mechanical integration, reduce wiring time, and remove the need for DC switching points.

Flexibility

Another benefit of the distributed microinverter design is the potential for installations to be expanded over time.  An initial set of solar modules can be installed and additional modules added as needs and budgets grow without requiring the replacement of a large centralized inverter.

Compliance and Reliability

The Enphase Microinverter is CSA Listed per UL1741 and can withstand surges of up to 6kV.  Enphase Microinverter Systems undergo rigorous testing including HALT and HASS, ensuring reliability.  Independent testing by Relex – a leading third party reliability expert – has shown an estimated Mean Time Between Failure (MTBF) of 331 years for Enphase Microinverters.

The Enphase Microinverter works in conjunction with the Envoy communications gateway and the Enlighten website.

SOURCE:Enphase Micro-inverter

Enphase Enlighten™
YourGreenDream – Solar System – Inverters
Enphase Energy

How to Buy – Products – Enphase Energy
Enphase Envoy Communications Gateway

4 Responses

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  1. TenagaSurya said, on June 14, 2009 at 4:59 am

    asSalaamu’alaykum.

    ENLIGHTEN

    The Enlighten website provides a wide range of information on the performance of solar power systems and individual solar modules.  A graphical representation of the solar array provides “at a glance” information on the status of each module.  More detailed information, including current and lifetime performance metrics, gives users a true view of the benefits of their solar energy installation.  In addition, Enlighten provides access to mobile devices, allowing system owners to view real-time performance information anywhere, anytime.

    See a live demonstration of Enlighten.

    Integrated Per-module Monitoring

    Enlighten automatically monitors the performance of every module in the system.  No additional monitoring hardware or software is needed. Unlike third party monitoring systems, which only monitor the inverter, Enlighten provides unprecedented visibility into the performance of every individual module.

    Flexible Views

    The Enlighten website provides harvest information in various forms – including summary views, totals by day/week/month/life-time, and time-lapse motion summary – for the entire array and individual modules.  This richness of data collected from each module helps the owner troubleshoot and verify the solar system performance.

    Analytics

    Enlighten is continuously monitoring the performance of the solar power system and will highlight any deviation in performance by comparing the harvest of individual modules to the harvest of surrounding modules.  Customers can choose to be sent an alert upon certain conditions, and problems can be addressed either during routine maintenance or at the installer’s convenience.

    The Enphase Enlighten website works in conjunction with the Enphase Microinverter and the Enphase Envoy communications gateway.

    SOURCE: Enphase Enlighten™

    Enphase Micro Inverter | Focused Energy Distributor of Renewable Energy Equipment – 505.216.7834|Pict
    SolarDepot.com:Inverters / Enphase

  2. TenagaSurya said, on April 26, 2011 at 2:06 pm

    asSalaamu’alaykum.

    Solar System – Inverters.

    From the last page we now have Direct Current (DC) power stored in our batteries but quite a few devices use Alternating Current (AC). To convert our stored DC to AC we need to use an Inverter. While inverters are fairly simple, modern ones have many more functions rather than just changing the current flow. Most of them also up the voltage to a industry standard for the country. When choosing an inverter there are a couple of things we must look at, size and quality.

    Size
        You will need an inverter that will support the loads you wish to draw through it (current and future loads). Add up what you will be using to work out how many watts at most you will want to use. And the easy bit, you need an inverter than will handle that load. Even if your inverter is not that expensive its a good idea to buy a fuse to protect it. Past that you need to choose one that produces the right voltage and frequency. Most AC devices either use 240V, 50 Hertz or 120V, 60 Hertz, and it’s pretty standard across any country, so check one of your devices and the rest should be the same.
    It’s also worth a not to check if the power output is continuous or surge. When some items like motors are turn on they can require up to 7 times as much power as when they are running. The inverter you get should be rated to handle those those surge loads as well as the continuous loads. And it’s always safer to get a larger one than you need just incase.

    Quality
        The quality of the electricity is determined by what is called it’s waveform. If you are running sensitive devices like TV’s and computers then you will need a better quality of power. Lets go through some basics of waveforms.

        You can see above roughly what AC looks like over time. One moment current is flowing in one direction (12 VDC) and the next minute in the opposite direction (-12 VDC), ie over time current changes directions – aka it alternates. The frequency or cycles over time give your hertz (50 Hertz means 50 cycles per second) and the amplitude the voltage. The waveform, the important thing in determining the quality, is the shape of this wave. The best quality wave is the sine wave (given by the formula Y=sin(x) ) and approximately like the picture above. And the poorest quality wave is a square wave, like below.

        A Square waveform is very cheap to produce and the sine wave is the most expensive. Square waveforms are pretty hard to find as they are such low quality but as you can imagine there are many shapes of waveforms between these, one of the most popular is called the quasi sine or modified wave.

    Other choices
    Inverters can be driven mechanically (by motors) or electronically. Mechanical inverts deliver a pure sine wave and handle changes in demand easily but the are not great with surges and are not that efficient. There are two types of electronic inverters, high frequency switching units (cheap and light, but have a short life and don’t handle surges well) and transformer based (more expensive but last longer). If you have access to grid power there is also a third option of synchronous inverter, that gives and takes power from the grid depending on demand (very expensive).

    And that is pretty much a complete solar system. Enjoy and mail me if you have any trouble!

    SOURCE: YourGreenDream – Solar System – Inverters

  3. TenagaSurya said, on April 26, 2011 at 3:29 pm

    asSalaamu’alaykum.

    The Traditional Approach

    An inverter is a power converter that converts direct current (DC) into alternating current (AC).  In a solar module installation, the inverter performs two key functions: it performs the DC to AC conversion and it optimizes the modules’ Maximum Power Point Tracking (MPPT).  Traditional solar energy installations deploy a single centralized inverter to convert the DC output from multiple solar modules into AC power.

    The Enphase Approach

    The Enphase Micro-inverter system is a fully integrated device that converts the DC output of a single solar module into grid-compliant AC power.  This integrated system maximizes energy harvest, increases system reliability, and simplifies design, installation and management.

    Features

    Productive

    Every module gets the benefit of individual Maximum Power Point Tracking (MPPT), thereby maximizing energy harvest
    With Enphase Micro-inverters, the modules are resilient to dust, debris, and shading
    Enphase Burst Mode technology provides greater production in low-light conditions

    Reliable

    No single point of system failure
    The Micro-inverter provides continuous monitoring of the performance of each PV module
    Soft switching reduces component stress

    Smart

    Quick and simple installation
    No central or string inverter to install or design
    The system provides 24/7 monitoring and management for each module
    The Enphase Micro-inverter system is the first commercially-available Micro-inverter system for residential and commercial solar PV applications. The Enphase System includes the following two additional components:

    Envoy Communications Gateway
    The module performance information generated by each Micro-inverter is collected by the Enphase Envoy (EMU). The Envoy then transmits this data over a broadband internet connection to the Enphase Enlighten™ website.
    Enlighten
    The Enphase Enlighten website analyzes the per-module data collected by each Micro-inverter.  Enlighten automatically detects any shortfall in energy production, identifies possible causes, and suggests solutions to correct the problem. The Enphase Enlighten website is constantly monitoring and managing every module on every installation.

    SOURCE: Enphase Energy

  4. sonukumar25 said, on August 20, 2014 at 4:33 pm

    Nice Post , Inverter is mostly useful device to save our elements and improve their life..


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