To compute the sunlight based charger productivity, you want to partition its greatest power yield (Watts, for example 500W) by its complete region in square meters (suppose 2.3 sq.m.), then partition it again by the STC Irradiance esteem (1000 W/sq.m.). The outcome will then, at that point, be duplicated by 100 to acquire the percent esteem. This is the least difficult technique on the most proficient method to ascertain sunlight powered charger productivity.

Solar Panel Efficiency Formula

Efficiency (%) = (Pmax ÷ Area) ÷ (1000) x 100%

where, Pmax = solar panel peak power (in Watts)
Area = length x width of the solar panel (in sq.m.)
1000 = Standard Test Condition (STC) irradiance (in Watts/sq.m.)

By this straightforward sunlight based module productivity recipe, you will know how proficient a sun powered charger is, beside finding it on its determination sheet or at its nameplate. As the productivity of the sunlight based charger will be determined by this recipe, you can now affirm the module proficiency subtleties when you see a sunlight powered charger utilizing this technique.

Attempt our apparatus underneath to check how productive your sun powered PV module is. Simply enter the right qualities for the sunlight based charger greatest power at STC, length of the module, and its width in millimeters (mm). Click the “Ascertain” button just subsequent to entering the expected information.

In the event that you missed it, you can likewise attempt our voltage drop adding machine to approve the sun oriented link size for your PV framework.

What is solar panel efficiency?

Sunlight based charger effectiveness can be just portrayed as the proportion of the module’s power ingestion to the info irradiance on standard test conditions. The power assimilation of the module is the most extreme sunlight based module Wattage separated by its surface region. Then again, the info irradiance is the brilliant power provided per unit region which is equivalent to 1000 Watts for each square meter at Standard Test Conditions (STC).

In this manner, sunlight based module productivity lets us know how successful a sun powered charger is in changing sun oriented energy into valuable power through the Photovoltaic impact.

The test with respect to sun powered charger makers principally reduces to further developing sun oriented module proficiency. They plan to fabricate a module that really changes sun based energy over completely to helpful power utilizing less surface region. Hence, the value of a sun powered charger expansions in relation to its productivity.

Solar Panel Efficiency Calculation

More often than not, sunlight based makers will promptly show the insights regarding the PV module’s effectiveness on its details sheet or at the rear of the actual board. In any case, to know how the sunlight powered charger effectiveness is determined, you can follow the straightforward strides underneath:

Step 1. Know the module’s maximum power capacity

You can undoubtedly know this by taking a gander at the module datasheet, or by checking out at the rear of the sunlight powered charger itself. It will have its subtleties displayed on the back sticker ordinarily. They regularly mark it as Pmax or most extreme force of the module. They regularly put it on the model name itself so this is definitely not something hard to do.

Step 2. Get the module’s physical dimension

This step is essentially as direct as it appears. Simply take a measuring tape, get the length and width of the sunlight based charger and you’re finished. Or on the other hand, you can likewise search for its aspect from the module’s detail sheet.

Step 3. Get the power per unit area of the solar module

When you have the estimations of the module’s length and width, you can now get its power per unit region. Simply partition the sunlight based charger’s most extreme power limit into its whole region. This will be as far as Watts per square meter.

Step 4. Know the solar irradiance value at STC

Irradiance is characterized as the brilliant power (in Watts) got by the unit region of the surface (in square meter). In sun powered charger tests, this implies how much brilliant energy that is radiated to the outer layer of the module.

In addition, STC represents Standard Test Conditions. This is the arrangement of measures that the sunlight based industry follows for the circumstances under which a sun powered charger will be tried. The circumstances are as per the following:

  • Solar Cell Temperature at 25°C. This refers to the temperature of the solar cell itself, not the temperature of the surrounding.
  • Solar Irradiance at 1000 Watts per square meter. This refers to the amount of light energy received by a unit surface at a given time.
  • Air Mass at 1.5

Step 5. Solar panel efficiency calculation

After cautiously following the straightforward strides above, you will have all you really want to know how effective a specific sun powered charger is. This is finished by separating the power per unit region of the sun based module (in Watts/sq.m.) by the sun oriented irradiance at STC which is 1000 Watts/sq.m.

The proportion that you get after the computation will be the productivity of the sun oriented PV module that you are searching for.

What affects solar panel efficiency?

The restriction in sun based cell proficiency straightforwardly influences how effectively a sun powered charger changes over sun oriented energy into power.

“In material science, the Shockley-Queisser limit (otherwise called the definite equilibrium limit, Shockley Queisser Effectiveness Cutoff or SQ Cutoff, or in actual terms the radiative effectiveness limit) alludes to the most extreme hypothetical proficiency of a sun based cell utilizing a solitary p-n intersection to gather power from the phone where the main misfortune system is radiative recombination in the sun based cell. It was first determined by William Shockley and Hans-Joachim Queisser at Shockley Semiconductor in 1961, giving a most extreme productivity of 30% at 1.1 eV.”

This reduces to the materials utilized, the intelligent effectiveness, and how well the sunlight powered charger handles heat.

The efficiency of solar cells

Sun based cell effectiveness alludes to the proportion of the power result of a sun oriented cell to its power input while thinking about its surface region. It is the part of energy as daylight that can be changed over through photovoltaics into power by the sun oriented cell.

The facts really confirm that sun powered cell productivity straightforwardly influences sunlight based charger proficiency. In any case, we want to comprehend that they don’t liken to one another.

You might ask, why? Is certainly not a sunlight powered charger comprised of individual sun based cells? Indeed, you are right. In any case, while computing the productivity of a sunlight based PV module, you think about the entire surface region of the board. This is a result of the holes between sun based cells inside the sun powered charger. Furthermore, you will likewise have to consider the surface region of the aluminum outlines since it is additionally important for the PV module.

What is the solar cell IV Curve?

Besides, when we take a gander at the power result of a PV module on its datasheet we will likewise see its IV Bend. The IV Bend is otherwise called the Flow (I) Voltage (V) normal for an electrical gadget like a sun oriented cell.

Regularly, this is addressed as a chart that shows all the conceivable power points of the power yield at some random arrangement of conditions. The arrangement of conditions incorporates the sun based cell temperature, air mass, and irradiance (or light power).

Sun oriented cell makers direct tests to perceive how their items act in different temperatures and irradiance level openness. The outcomes will then be reflected in a graphical configuration and the most extreme worth they get as far as Watts will be the greatest power limit of the specific sun oriented cell.

In any case, how does temperature influence sunlight powered chargers in reality? Presently, that is for another significant conversation.


Glancing back at the beyond a very long while, we can perceive how the productivity of sun powered PV modules has expanded fundamentally. Furthermore, this will ultimately keep on going up to its pinnacle.

It is perfect to perceive how the sun oriented industry is flourishing towards better sun powered module effectiveness. Taking into account the advantages we can get from it, we realize this is heading down the correct path. Whether it be an off-matrix planetary group, lattice tie, or a half breed framework, upgrades in sunlight based charger proficiency will constantly be significant.

In the long run, we will have sunlight based power establishes that produce clean energy even in a little measure of room accessible. All the more critically, the expense has likewise descended enormously. This makes utility-scale sun based among the least expensive electrical power source you can fabricate.