what are the factors we take in consederation and wat formulas we can use.
for example: imagine i have a bulb of 150 watt , what are the steps taken to by the solar cell pannel and the rechargeabel battery needed for my system.
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The energy produced by the solar cell is related to the intensity of the radiation from the Sun at that particular time. Its called irradiance. Say you wanted to power that bulb for a day, you would need to calculate the total irradiance (which is energy per square meter) using this formula:
Edaydensity = (Imax)(Tday)/(pi/2) where Eday density is the daily energy per square meter, Imax is the maximum irradiance of the Sun, at around the afternoon and Tday is the total time that sunlight is available. If you want to go the easy route just choose 250w/square mater as the average density.
The second is to determine how much power a single solar cell can derive from that 250w/square meter and you’d figure out by looking at the efficiency. A bulk silicon solar cell can provide around 22% efficiency. Based on that you can calculate the number of solar cells required to power a 160W bulb. The rechargeable battery is charged using surplus power that the solar cell isn’t using when its under operation. i.e. whatever’s left over is sent to the battery. You can determine the surplus power by calculating the amount of power produced by the total solar cell array (power from all the solar cells) minus the power consumed (160W). The entire solar cell system consists of the solar cell which connects to a DC converter to produce DC current. But for household appliances and electronics, this DC current is connected to an inverter to produce AC current. The solar cell is also connected to the battery which stores the excess power.