Things to know before installing solar cells

How should I prepare?

Is it really possible to solve the problem of expensive electricity bills?

In April 2023, there was a suspicious increase in electricity bills.

Until a wave of criticism

and electricity bills are shown all over social media

Until the Metropolitan Electricity Authority had to come out and give an answer about the reason for the increase in electricity bills that

The problem of high electricity bills is caused by the heat and temperature in Thailand rising in April.

makes the operation of home electrical appliances work hard

and consume more electricity

Even if we use the same electrical appliances in our home every day.

From the above events, people are looking for ways to reduce the cost of expensive electricity bills.

By installing solar cells is another interesting solution.

And people began to share their experience of installing solar cells.

worthwhile investment

because by sunlight

Including the heat in Thailand

“Installation of solar cells” may be a good solution.

Things to know before installing solar cells

Before installing solar cells, you need to consider carefully.

Because the installation will have a long term of 25-40 years if there are some items that are not suitable for installation.

May make installing solar cells not worth the money spent.

Here are some things to consider:

Check the power in your home.

Estimate the power of the house

And check the use of electricity in the house that is in the amount.

In order to make the selection of solar cells correctly according to the purpose of use

Before installing solar cells, additional consultation can be obtained from solar panel installers.

direction of the house

The best direction to install solar cells is the south because it receives sunlight all day, followed by east and west.

that receives light from morning to noon

but will not fully use the efficiency of the solar panel

The direction that is not recommended is the north which receives the least amount of sunlight.

And it's not worth installing solar panels. 

roof strength

It is something that should be given great importance before installing it.

because solar panels are heavy

With some models weighing up to 22 kilograms, it has been on the roof of our house for many years.

If the roof of the house is not strong, there are cracks, leaks, it may not be able to support the weight well.

cause problems later

service provider for installing solar cells

Another thing to consider

And use a lot of caution is to choose a service provider for installation.

should look at the matter of budget

expertise of service companies, various standards that should be obtained, and most importantly

Solar panel insurance should be given for a period of 25 years or more.

Care and maintenance of solar panels

If the solar panel is installed

Always have time to take care of and check the condition of the solar panel.

Because the presence of dirt can cause the most problems, such as the burning of various electrical systems.

The inefficiency of bringing electricity from solar panels

Therefore, solar panels should be cleaned regularly 4-5 times a year.

Advantages and disadvantages of all 3 types of solar panels.

  • Thin Film Solar Cells - Thin Film Solar Cells

Advantages: light weight, cheap, resistant to hot weather well


Disadvantage: produces less electricity

short service life

Not suitable for industrial and household installations.

  • Polycrystalline Silicon Solar Cells - Polycrystalline Panel

Advantages: inexpensive, heat resistant.


Disadvantages: have a service life of 20-25 years.

  • Monocrystalline Silicon Solar Cells - Monocrystalline Panel

Advantages : Popular, high quality, good electricity generation even in low sunlight.

Service life 25-40 years.


Disadvantages: High cost.

Differences in the system of using electricity from all 3 types of solar cells

On Grid Solar System: A system to use electricity from solar panels.

and electricity simultaneously

It's very popular in Thailand.

It will bring electricity from the solar panel.

through a voltage converter

to convert direct current to alternating current

to supply electricity to home appliances

The solar cell energy can only be used during sunny days.

When the night falls, it will return to use the system from the electricity as before.

Off Grid Solar System: The system uses solar cells.

directly without electric power

Popular in places where electricity is not accessible.

can be stored on the battery

Hybrid Solar Cell System: A combination of On-Grid and Off-Grid can store electricity for use at night.

If the solar cell system produces more electricity than it can use.

Applying for permission to install solar cells

After all the preparations

Before solar panels are installed, the site is surveyed, the size and orientation of the carrier are measured.

The applicant must prepare various documents.

go to apply at the Metropolitan Electricity Authority

or the Provincial Electricity Authority as follows

  • Photo of the installation plan of solar panel equipment

  • A copy of the evidence for notifying the local government

  • notify the Department of Public Works

    together with a civil engineer with a Khor License to inspect the installation readiness

    to certify that the place of residence is ready

  • Use the Single line Diagram document from the above.

    which was signed by an electrical engineer who has a certificate of approval

  • Design Measures Checklist

  • Details of solar panels to be installed

By the procedure for permission to install

Some contractors provide services for convenience.

The installation price depends on the number of solar panels, the area and the number of electrical appliances.

Average starting at 70,000 baht - 900,000 baht approximately.