Regardless of the type of silicon manufactured, the price of the now popular solar panels - 21 volts open circuit (about 18 V with load) is about 32 yuan per watt.
A laptop needs at least 18 volts and 60 watts of power, which means 60W*32 yuan (ideal configuration)! The actual configuration should be greater than 80W, because the power of the solar cell is directly proportional to the sunlight, and the actual charging power will be different from the rated quality! A small white cloud can reduce energy by 30% or more!
There is also the problem of surface area. Generally, the area per 10W is about 350*250mm.
Just use a single 10W chip for charging (if you want to leave your laptop in the sun for a long time). A continuous power supply would be very inconvenient and uneconomical! !
Solar energy productionmainly depends on the power duration and power supply. In terms of power, laptop + indoor light + router = around 100+2*20+30=170w. the power of 300W is completely To meet the needs, you can consider an output power of 500W for capacity expansion. Roughly speaking, 200W will require 0.2 kWh if used for 1 hour. The amount of energy storage can be calculated based on the working time. Generally, solar energy storage accounts for the normal use amount about 3 times, to prevent normal use in rainy days, solar charging generally accounts for more than 40% of the energy storage capacity.