Are you planning to buy solar panels for your home or building to reduce the power bill? You must have many questions like how much electricity can solar panels produce? or how much solar energy can be obtained from the solar panels?

The list goes on, but all these questions can certainly be answered by calculating the solar energy produced by the solar power system.

The amount of solar power that solar panels produce depends on size, cell efficiency, location, wattage, sunlight hours, and many other things. Moreover, how many solar panels you use will also affect the output.

You must know all the things before buying a solar panel from any solar company. It will help you in making a better decision.

You have come to the right place if you want to know how much energy a solar panel system can produce. This article will tell you how much electricity your solar panel can produce and how to get more electricity output from your solar panel.

Let’s get started without further ado.

What is a solar cell, and how does it work?

A solar or photovoltaic cell is made up of two sandwiched silicon semiconductor layers, N-type and P-type. The N-type layer contains elements such as arsenic, which gives the cell a negative electric charge.

On the other hand, the P-type layer has elements such as boron or gallium, which provides the cell with a positive charge.

When linked to a circuit, these two layers act as two terminals of a battery. Electric current travels from the positive layer to the negative layer as a result.

We know that flowing electrons produce electric current, and solar panels use sunlight to do so. When the solar cell is exposed to sunlight, the pictures transfer energy to the electrons in the P-type layer.

As a result, electrons transfer this energy to the top N-type layer. The passage of electrons aids the development of an electric current.

What effect does light have on solar panels?

When it comes to charging a solar panel, the amount of light that falls on it is crucial. The solar panel’s output or efficiency is related to the amount of light it receives.

Solar CellsThe amount of light or light intensity affects the current-voltage, short-circuit current, and the maximum output of a solar cell. The better the output, the higher the light intensity.

However, the output of the solar cell approaches a limit after a certain point, beyond which more light will not produce more current. The type of light used impacts the output or efficiency, and when the cell is energised with sunshine, it performs at its best.

What are the factors that affect the solar panel output?

It is best to know the solar panel output beforehand because it will help you in the future.

There are several solar panels available on the market due to the boom of the solar industry. Hence, it has become challenging to choose the right one. However, if you know about the factors that influence the solar panels’ output, you will surely make the right move.

Multiple factors determine how much energy do solar panels produce. We have listed down the primary ones here for your understanding. Have a look-

Number of solar panels used

How many solar panels you use will be a determining factor in the amount of electricity produced.

The more the number of panels in your solar panel system, the more will be the solar panel’s output.

To get the best out of the renewable energy you get from your solar power system, you will have to ensure that the area on which you install the solar panel system is big enough. If you are installing it on your roof, ensure that you have ample roof space and a south-facing roof.

Solar panel wattage

Energy production by a single solar panel depends mainly upon the solar panel wattage.

Solar panel manufacturers and people, in general, define solar panel wattage as the maximum power output solar panel produces under ideal daylight hours and temperature.

Wattage is determined by multiplying volts by amps, where volts denote the electrical force and amperes (amps) denote the total amount of energy used.

Hence, the amount of power you can generate from the solar panel or solar panel system will depend mainly on the wattage of individual solar panels.

Type of solar panels used

It doesn’t matter if you are looking for residential solar panels or for your office, the type of solar panel will not be determined by how you will use it. Conventional solar panels that have been in use over decades are monocrystalline panels and polycrystalline panels. However, there are different types of panels like TFSCs, A-Si, etc., on the market today.

All these different kinds of solar panels have different sizes and cell efficiency, which means that how much solar power you get from the solar panels depends on the type of panel used.

Solar Panel efficiency

How much electricity does your solar panel produce is also dependant on its efficiency. It is also known as the solar panel output by many.

Roof Solar PanelsEfficiency is the ratio of output and input energy of the solar systems.

Solar cells have specific efficiency, which is calculated for determining how much power or how much electricity your solar panels produce. Hence, make sure to check the efficiency before buying.

Amount and angle of sunlight

The amount of power or kWh of electricity produced by the solar panels also depends on the amount of light or solar energy it receives. Hence, it is crucial to ensure that the solar panels are placed at a non-shady place that gets enough energy from the sun all day.

Home solar panels are usually not appropriately fixed if one tries to do it on their own. Most solar panels either get placed at the wrong place or the wrong angle if one does not get help from local installers.

Moreover, the solar panel output also depends on the solar radiation in your region. Hence, if you want to produce more energy from your solar PV system, you have to make sure that it gets ample direct sunlight.

Why is it important to know the solar capacity of your solar system beforehand?

As mentioned earlier, it is quite important to know the kilowatt-hours of energy or how many watts of power your solar panels generate. There are quite a few reasons behind it, and we have listed a few of them below, have a look-

Save on electricity bill

If you know the solar power output of your solar panels beforehand, you can save on the electricity bill strategically. You will learn how many hours of daylight your system will take for energy production and how much energy it will produce.

Buy smarter

Once you know what factors affect the solar power output of the solar cells and what solar capacity is in the first place, you will be able to buy solar panels intelligently.

Get clear Idea

Knowing how much energy your solar panel produces will give you an idea of how many solar panels you need to buy to meet your energy requirements.

How much energy does a single solar panel produce?

You first need to know the type of solar power technology the particular solar panel is using. In general, Monocrystalline panels are more efficient than polycrystalline panels.

You will be informed about the wattage of the solar panel by the manufacturer when you purchase the panel.

The majority of today’s solar panels have power output power ratings ranging from 250 to 400 watts. In general, higher power ratings are preferred over lower power ratings.

So, let’s assume that you have a solar panel of 400 watts and get 5 hours of sunlight in a day. In this case, you will have 400*5=2000 kilowatt-hours of electricity in a day for all your electrical connections.

How much energy can an entire solar panel system produce?

Now that you how how to calculate the output of a solar panel, it is easy to calculate for the whole system.

Solar SystemFirst, you need to determine the wattage of a solar panel, the number of solar panels in the system, and the daylight hours. Next, all you need to do is to put these values in the following formula-

The total output of the system = number of panels * daylight hours* wattage of a single panel.

For example- consider that you have 20 solar panels in the system, 5 hours of daylight, and each solar panel is 400 watts. Hence your total solar panel output will be 20*5*400=10000 Kilowatt-hours Kwh. This is in itself a considerable amount which will help you in benefitting from the feed-in tariff.

How long do solar panels take to pay for themselves?

As previously stated, the repayment period is determined by a variety of circumstances. It’s impossible to determine how long your solar panel will take to pay for itself, but we can give you an estimate.

The payback period can range from 5 to 16 years in general.

The payback period is uncertain because it is influenced by personal characteristics like consumption rates, which we may not be aware of. You can quickly figure out how long it will take you to pay off your loan. How? Continue reading to find out more.

How many solar panels do I need?

One can easily calculate the number of solar panels they need by considering the annual power consumption.

First, you will have to calculate the average of your monthly consumptions. Next, you need to divide this average value obtained by the monthly power output of your solar panel system.

Lastly, you will need to divide the value obtained previously by the wattage or power output of a single solar panel. Voila! You have the number of solar panels required for your home or building.

How much space do I need for installing solar panels?

Solar Panels on RoofThe amount of roof space required for solar panel installation depends entirely on the size, number, and kind of solar panels utilised (residential or commercial).

Solar panels come in a variety of sizes, depending on the model and manufacturer. However, the majority of installations use 60-cell or 72-cell modules.

The 60-cell panels are often classified as residential, while 72-cell panels are classified as commercial.

60-cell panels, on the other hand, are often 65×39 in, while 72-cell panels are typically 77×39 in. In other words, while 72-cell panels are taller than 60-cell panels, their breadth is the same.

Hence, the amount of roof space you will need can be determined by calculating the overall area of your roof divided by the overall area of the solar panel system.

What are the issues that solar panel owners have to deal with?

There will be many doubts and hardships that solar panel owners have to face. These difficulties have a significant impact on the energy produced by solar panels. Here’s a list of some of the challenges:

  • Unpredictable weather conditions.
  • Poor quality of the solar panels.
  • unprecedented construction nearby that hinders the sunlight.

To Sum Up

Solar panels are a good way of cutting down the electricity bill and maximising electricity production. However, you can only benefit from the panels when you know how much power do they produce.

Now that you know how to calculate the power output and factors that influence it, we are sure that you will buy smart.