بومنگ سولر فوٽووولٽڪ انڊسٽري سان, وڌيڪ ۽ وڌيڪ ماڻهو پنهنجن گهرن ۾ سولر سسٽم استعمال ڪري رهيا آهن, يا روزاني زندگي ۾ شمسي توانائي واريون شيون, جهڙوڪ شمسي توانائي سان هلندڙ هيٽر, شمسي باغ جي روشني, وغيره.
ڪڏهن ڪڏهن, ماڻهو شمسي پينل جي معيار تي ڌيان ڏيندا ڇو ته اهي رات ۾ وڌيڪ روشني چاهيندا آهن, جيئن ته هڪ بهتر سولر پينل بيٽرين ۾ ذخيرو ٿيل وڌيڪ توانائي کي قابل بڻائي ٿو, جيڪو ڊگهي وقت تائين يقيني بڻائي سگهي ٿو.
اهو مشهور آهي ته شمسي پينل جي طاقت شمسي پينل جي معيار کي فيصلو ڪرڻ لاء هڪ اهم عنصر آهي. واٽ وڌيڪ آهي, ڪم ڪندڙ موجوده اعلي آهي, چارج جي ڪارڪردگي بهتر آهي. گهڻا ماڻهو سولر پينل چونڊيندا آهن سولر پينل پاور جي مقابلي ۾.
بهرحال, جيڪڏهن اسان سولر پينل جي خارج ڪرڻ واري خصوصيت جي اندر کوٽائي ڪريون, اسان کي معلوم ٿيندو ته شمسي توانائي هڪ عنصر آهي جيڪو شمسي پينل جي معيار کي متاثر ڪري ٿو, پر اڪيلو نه.
هتي هڪ مثال آهي:
فرض ڪريو ته اسان وٽ ٻه شمسي پينل A آهن & ب, اهي سڀئي وولٹیج 6V سان آهن, پاور 30W, نظرياتي طور تي انهن جي چارج ڪارڪردگي ساڳي آهي. پر ڇا اهو صحيح آهي?
هڪ مثالي الگورتھم جي بنياد تي, هڪ معياري سج جي ڏينهن جي اندر, درجه بندي ٿيل ٻاھرين موجوده آھي I = 30W/6V = 5A. بهرحال, اهو ڪڏهن به نه ملندو مسلسل 5A ڪرنٽ سڄي ڏينهن ۾.
In practical application, due to the various kinds of geographical environment and weather conditions, there is almost no theoretical sunshine. Sometimes it rains, sometimes it has too many clouds in the sky, the sunshine change between weak or strong. As a result, the solar panel works in an unconventional environment 80% of the daytime probably, especially during dusk and dawn.
Now you may understand that it is meaningless to focus on the theoretical calculation formula, as the output current you calculate requires stable sunshine all the time, but it won’t happen even a day. Most of the time the solar panel receives weak sunshine and is hard to reach the rated output current.
Thus, the most important factor we always ignore is the low light performance of the solar panel, which decides how the solar panel works under weak sunshine.
What is the low light performance for the solar panel?
Low light performance, or low light efficiency of the solar panel, is the discharging efficiency of the solar panel during low light conditions.
Quoted from the academic sites:
“The low light performance/behavior of a solar panel is mainly dependent on the shunt resistance and series resistance of the cells.”
During low light condition, the solar panel discharging perfomance ensure the lowest value of the solar system charging, we can say it as a basement of the solar panel quality.
How can I know a solar panel’s low light performance is good or not?
Unfortunately, the testing of solar panel low light performance is difficult, it requires specific professional equipment, many factories or manufacturers don’t even have this testing ability.
بهرحال, we consumers can still have a way to compare the low light performance of solar panels by doing simple testing.
Assume you have two solar panels from different suppliers, the solar panels have the same power, same voltage, وغيره. Of course, you need to confirm the battery spec is also the same, it means these solar panels have the same system solution. Make them work under the sun during dawn, noon, and dusk, test and check the output current and working power respectively, then you can have the result that which solar panel has the better low light performance.
There will be no big difference during sunny days, but when it comes to rainy days or cloudy days, the low light performance will make big difference.
Welcome to contact us if any questions about this topic.
