Solar Panel Efficiency Formula

Given the same amount of sunlight shining for the same duration of time on two solar panels with different efficiency ratings the more efficient panel will produce more electricity than the less efficient panel.

Solar panel efficiency formula.

In addition polycrystalline solar panels tend to have a blue hue instead of the black hue of monocrystalline panels. If a solar panel has 20 percent efficiency that means it s capable of converting 20 percent of the sunshine hitting it into electricity. The highest efficiency solar panels on the market today can reach almost 23 percent efficiency. Solar panel watts x average hours of sunlight x 75 daily watt hours as an example let s say you have 250 watt solar panels and live in a place where you get 5 hours of sunlight per day.

Fill factor p max voc ioc or solar cell fill factor solar cell efficiency a c e voc ioc where voc open circuit voltage ioc short circuit current. The equation or formula of solar cell fill factor is as follows. To determine the operating efficiency as opposed to the ideal efficiency of your solar panels subtract the temperature of your solar panel from the stc temperature of 25 c then multiply that figure by the temperature coefficient of pmax. Solar cell efficiency refers to the portion of energy in the form of sunlight that can be converted via photovoltaics into electricity by the solar cell.

Here s a simple formula for calculating your solar panel s power output. For example the temperature coefficient of a panasonic hit 330w n type 96 solar panel is 258 per 1 degree celsius. Polycrystalline solar panels generally have lower efficiencies than monocrystalline options but their advantage is a lower price point. The average efficiency of solar panels falls between the 17 to 19 percent efficiency range.

So for every degree above 25 c the maximum power of the panasonic solar panel falls by 258 for every degree below it increases by 258. The efficiency of the solar cells used in a photovoltaic system in combination with latitude and climate determines the annual energy output of the system for example a solar panel with 20 efficiency and an area of 1 m 2 will produce 200. Electrical power in kwp of one solar panel divided by the area of one panel. This calculation will yield a negative percentage which you can then subtract from your initial efficiency rating.

R solar panel yield or efficiency h annual average solar radiation on tilted panels shadings not included pr performance ratio coefficient for losses range between 0 5 and 0 9 default value 0 75 r is the yield of the solar panel given by the ratio.