今天給大家科普一下，自己家里安裝太陽能光伏發(fā)電站的話，是并網(wǎng)還是離網(wǎng) ，需不需要蓄電池？

離網(wǎng)光伏發(fā)電站

   這也被叫做獨立光伏發(fā)電站，是不依賴電網(wǎng)而獨立運行的發(fā)電系統(tǒng)，主要有太陽能電池板、儲能蓄電池、充放電控制器、逆變器等部件組成。太陽能電池板發(fā)出的電直接流入蓄電池并儲存起來，需要給電器供電時，蓄電池里的直流電流經(jīng)逆變器并轉(zhuǎn)換成220V的交流電，這是一個重復循環(huán)的充放電過程。這種發(fā)電系統(tǒng)由于不受地域的限制，使用很廣泛，只要有陽光照射的地方就可以安裝使用，因此非常適合于偏遠無電網(wǎng)地區(qū)、孤島、漁船、戶外養(yǎng)殖基地等，也可以做為經(jīng)常停電地區(qū)的應急發(fā)電設備。

   這種系統(tǒng)由于必須配備蓄電池，且占據(jù)了發(fā)電系統(tǒng)30－50%的成本。而且蓄電池的使用壽命一般都在3－5年，過后又得更換，這更是增加了使用成本。而經(jīng)濟性來說，很難得到大范圍的推廣使用，因此不適合用電方便的地方使用。

   但對于無電網(wǎng)地區(qū)或經(jīng)常停電地區(qū)家庭來說，又具有很強的實用性。特別是單純?yōu)榱私鉀Q停電時的照明問題，可以采用直流節(jié)能燈，非常實用。因此，離網(wǎng)發(fā)電系統(tǒng)是專門針對無電網(wǎng)地區(qū)或經(jīng)常停電地區(qū)場所使用的。

Today give you a popular science, if you install solar photovoltaic power stations in your home, is connected to the grid or off the grid, do you need batteries?  

Off-grid photovoltaic power station  

This is also called independent photovoltaic power station, which is independent of the power grid and operates independently. It is mainly composed of solar panels, energy storage batteries, charge and discharge controllers, inverters and other components.   The electricity from the solar panel flows directly into the battery and is stored. When it is needed to power the electrical appliance, the direct current in the battery flows through the inverter and is converted into 220V ALTERNATING current. This is a repetitive charging and discharging process.  This kind of power generation system is widely used because it is not restricted by region and can be installed and used as long as there is sunlight. Therefore, it is very suitable for remote areas without power grid, isolated islands, fishing boats, outdoor breeding bases, etc., and can also be used as emergency power generation equipment in areas with frequent power outages.  

Such systems account for 30-50% of the cost of generating electricity because they must be equipped with batteries.  And the service life of the battery is generally in 3-5 years, and then have to be replaced, which is to increase the cost of use.  In terms of economy, it is difficult to be widely promoted and used, so it is not suitable for use in places where electricity is convenient.  

However, it is very practical for families in areas without power grid or in areas with frequent power outages.  In particular, in order to solve the lighting problem when power failure, you can use DC energy-saving lamps, very practical.  Therefore, off-grid power generation system is designed for use in areas without power grid or areas with frequent power outages.