Next, consider renewable energy sources like solar electric systems, compact wind turbines and geothermal heat pumps to help power your home.

接下来，可以考虑一下可再生能源，比如太阳能电力系统，小巧的风能系统以及地热装置来给住宅供能。

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The paper introduced its main performance and some technical countermeasures taken in the design of its mechanical and electric systems.

本文介绍了其主要性能及机械电气系统设计中采取的有关技术措施。

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This paper analysed the characteristic of the matching operation of crane and elevator, and presented its hydraulic and electric systems.

本文就其吊机与升降机配合作业的特点进行分析，并简介其液压系统和电气系统。

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The electro electric systems business markets transformers, switchgears, circuit breakers, power electronics and control systems and others.

FORBES: Hyundai Heavy Industries

Its competitors, on the other hand, farm out the installation and sometimes the maintenance of the solar electric systems they have sold.

FORBES: SolarCity Posts Higher Q1 Sales And Installations

The price appears lower than the average small solar electric systems that have been sold in California in the past 12 months, according to state government data.

FORBES: Ford To Market Focus Electric With SunPower Gear