Testing ALLPOWERS 60W 18V Solar Charger
Автор: Alexey L
Загружено: 2016-07-07
Просмотров: 1675
Описание:
Quick test:
1. 25W instead of 60W at max load, voltage drops to 12V
2. 30W when load is limited, voltage drops to 20V (24V when idle)
Sun height: 56..57.5 degrees above horizon
Square of the elements = (12.5cm*12.5cm - 1.8cm*1.8cm) * 20 elements = 3060.2 cm^2 ~= 0.306 m^2
Solar energy for 56 degree Sun per m^2 when directed towards the Sun: 902.5W/m^2
With respect to square: 902.5W/m^2 * 0.306m^2 = 276 W
Actual effeciency: 30/276 = 10.9%
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