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  • 4000mAh
自行车,又称脚踏车或单车,通常是二轮的小型陆上车辆。

自行车,又称脚踏车或单车,通常是二轮的小型陆上车辆。人骑上车后,以脚踩踏板为动力,是绿色环保的交通工具。

英文bicycle。其中bi意指二,而cycle意指轮,即两轮车。在中国内地、台湾、新加坡,通常称其为“自行车”或“脚踏车”;

在港澳则通常称其为“单车”(其实粤语通常都这么称呼);而在日本称为“自転(转)车”。自行车种类很多,有单人自行车,双人自行车还有多人自行车。

可以作为环保的交通工具用来代步、出行;越来越多的人将自行车作为健身器材用来骑行锻炼、自行车出游;

自行车本身也是一项体育竞技运动,有公路自行车赛、山地自行车赛、场地自行车赛、特技自行车比赛等。

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  • Photovoltaics based on power supply type

    DC power system and AC power system

  • According to the characteristics and types of the power supply

    Divided into independent photovoltaic power generation systems and grid connected photovoltaic power generation systems

  • Is there any noise hazard in photovoltaic power generation systems?

    The photovoltaic power generation system converts solar energy into electrical energy without generating noise effects. The noise index of the inverter is not higher than 65 decibels, and there is no noise hazard.

  • Does photovoltaic power generation system pose electromagnetic radiation hazards to users?

    The photovoltaic power generation system converts solar energy into electrical energy based on the principle of photovoltaic effect generated by light. It is pollution-free and radiation free, and electronic devices such as inverters and distribution cabinets have passed EMC (electromagnetic compatibility) testing, so it is not harmful to human health.

  • How to deal with the temperature rise and ventilation issues of solar cells?

    The output power of photovoltaic cells will decrease with increasing temperature, and ventilation and heat dissipation can improve power generation efficiency. The most commonly used method is natural wind ventilation.

  • What should be paid attention to in fire prevention and firefighting of household distributed photovoltaic power generation systems?

    Flammable and explosive materials are prohibited from being stacked near distributed power generation systems. In the event of a fire, the personnel and property losses caused are incalculable. In addition to basic fire safety measures, photovoltaic systems are also reminded to have self detection and fire prevention functions to reduce the likelihood of a fire. In addition, fire prevention and maintenance channels must be reserved every 40 meters, and there must be emergency DC system circuit breakers that are easy to operate.

  • The main advantages of solar photovoltaic power generation

    Isolation temperature. Heat insulation in summer and block cold in winter.

  • Photovoltaic power generation reduces the rate of roof aging

    After installing photovoltaic panels on the roof, it can block direct sunlight from shining on the roof, reduce the aging rate of roof tiles, and extend their service life.

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