Electrical fire mainly is as electrical circuit, electrical equipment, appliance and power unit having malfunction to release thermal energy (such as heat, electric arc, electric spark) and no malfunction to release power (such as fervidity surface of electric appliance, it could be ignited by other inflammable goods or under its ignition point condition to cause…
Solar street light is charged by solar in daytime and bright in night, there are lithium battery built-in, different configuration can meet different requirement. Let us take some examples to introduce the configuration for solar street light. Calculate Current For example: A solar street system, 2pcs 30W LED lamps, 12V lithium battery. Current=60W/12V=5A Calculate Battery…
Solar street light system consists of solar panel, storage battery, solar controller, main light source, battery box, main lamp body, lamp-post and electric cables. Solar street light is not limited by district, not influenced by installation location, also don’t have to excavate road surface to pave cables, it is very convenient to construct and install,…
As we know, solar cells and solar panels are the core components in solar power system. In order to learn more solar panel, it is necessary to introduce how to produce solar cells and solar panel. 1. The working principle of solar cells. The solar irradiance radiates on the p-n junction of semiconductor to…
Traditional street light which is mentioned in this text is powered by public electric grid. The effectiveness of solar street light and traditional street light. 1) The installation of traditional street light is complicated, at first it need pave cables, it need dig ditch, paving concealed conduit, getting through wires inside conduit, backfill, etc, then…
Solar street light consists of solar module, LED lamp head, battery, controller and lamp-post, etc. Solar panel converts solar radiation into power electricity to charge storage battery getting through solar controller in daytime, when sunlight decreases up to about 10lux in night, the open circuit voltage (Voc) of solar panel is about 4.5V, after detecting…
There are many questions that investor would like to know before investing to install a home solar power system. For example, (1), What condition is required for rooftop when installing a home solar power system ? (2), Is it safe for rooftop distributed home solar power system ? (3), How much money is required to…
Solar power system is made up of solar panel, controller, storage battery, and inverter. Solar panel is the core component for solar power system, how to improve the conversion rate and reduce production cost are two main problems to solve. Presently, the efficiency of solar cells have reached about 18%~19%, the efficiency of solar modules…
The energy conversion unit of solar power system is solar cells. The working principle of solar cells generation is photovoltaic effect. Solar cells absorb sunlight energy when it is radiated by solar, to produce photoelectron named as electron-hole pairs. The photoelectron and electron hole would be separated under the function of electric field built-in battery,…
With the gradual approach of fossil fuel crisis and sharpness of environmental problem, to develop renewable energy is extremely urgent. Solar energy is unlimited storage, widespread existing, cleaning exploitation and economic developing, etc, which makes it become ideal alternative energy. In the meantime economic development, energy-saving is also the important problem that society faces. LED…