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  • After-Sales Service

    After-Sales Service Thank you for choosing " GREEF"  new energy products. We always provide a comprehensive range of services before, during and after sales. "GREEF NEW ENERGY guarantee as follows: I. Warranty period: GDF SERIES  PERMANENT MAGN...
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  • Differences Between GREEF Permanent Magnet Generators and Other Factories

    Greef New Energy is a globally leading supplier specializing in wind, solar, and Permanent Magnet Generator (PMG) system solutions. In recent years, we have frequently received feedback from new customers stating that generators purchased from other companies c...
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  • Permanent Magnet Generator: An Overview

    Permanent Magnet Generator: An Overview Introduction      Permanent magnet generators (PMGs) are innovative devices that convert mechanical energy into electrical energy using permanent magnets to create a magnetic field. These generators are notable for their ...
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  • Choosing a small wind turbine

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  • How to choose diffierent energy system solution ?

    Off-grid System PV off-grid systems work by combining wind power and photovoltaic power. When there is enough wind, wind turbines convert wind energy into electric...
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  • Wind Turbine Power Curve

    Wind Turbines Power Curve   The power curve is composed of wind speed as an independent variable (X), the active power acts as the dependent variable (Y) to establish the coordinate system. A scatter plot of wind speed and active power is fitted with a fitting curve...
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  • Wind Energy Math Calculations

    Wind Energy Math Calculations   - Measuring the Swept Area of Your Wind Turbine Being able to measure the swept area of your blades is essential if you want to analyze the efficiency of your wind turbine. The swept area ...
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