China had a legacy electrical grid that has not changed for nearly a century.  Furthermore, the buildup of power generation, which is generally coal-based in China, is extremely expensive.  Smart Grid helps alleviate these issues.  By overlaying Internet-type communication capabilities on top of a legacy electrical grid that hasn't changed for nearly a century, Smart Grid provides old and new types of energy when and where it is needed. It encompasses power generation, transmission, distribution, and end-use. It reaches power utilities, wind and solar farms, industrial factories, apartments, government buildings, municipalities, and electric vehicle charging stations.  

 

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Without Smart Grid, the renewable energy supply industry will not be able to grow at scale.