< Back

Is Installing Solar Panels Right for You?

Published: 13 September 2021 (4 minutes reading)

Executive Summary

•To decide whether or not this source of energy will help you, remember to consider these five factors before finalizing your decision: understand your electricity consumption behavior, calculate investment cost and payback period, survey installation area, obtain permission documents, and compare different contractors.

More and more people are installing solar panels on their rooftops. The reason behind this is that solar panels are not just good for the environment, but they can also be a very lucrative investment. However, you might want to think twice before making such a big decision and following through: There is a lot that needs to be taken into consideration before installation. In this article, we will provide five practical considerations to make before deciding whether or not a solar panel is right for you.

1. Electricity consumption behavior

Check your electricity consumption behavior by looking at the power bills over the past 3 months to 1 year, because this behavior will guide you to know how many solar panels you should need and what size of the solar panel is needed. The more you can know about how you use electricity, the better you will be able to determine if solar power will benefit you.  In addition, you should compare the consumption rate between daytime and nighttime. The more consumption during daytime, the more solar panels help you save the bills.

2. Investment cost

Investment cost is the most important factor you need to consider before determining whether or not solar cells are right for you. Before investing some money on installing solar cells, you should first get an estimate of the cost, and calculate payback period of the investment. The average price for small size of solar panels is around 25,000 – 35,000 THB per 1 kW. While, the payback period should be in between 6 – 9 years depending on the size1.

3. Installation area survey

Surveying the installation area is an essential step when installing solar panels. It is important to make sure that the solar panel will receive enough sunlight throughout the day. The area should receive direct sunlight at least 5 hours a day. You should carefully survey the installation area to see if there are any obstacles such as trees or roof-top air conditioners that might block the sunlight. Shade from trees or other objects can cause them to produce less energy than they otherwise would have.

4. Permission documents

Installing solar panels will require you to obtain a utility-connection permit issued by your local power company and the state government. It is important to get permission before planning on installing solar panels.

1.Firstly, you need to submit a request to the civil department at your local government. The civil department will send engineers to inspect the roof condition whether it needs a repairment

2.After checking the condition of the roof, you must apply for permission from the local Provincial Electricity Authority (PEA) or the Metropolitan Electricity Authority (MEA)

3.The last step is to submit the above documents to the Energy Regulatory Commission (ERC). They will be the one who consider whether you can install solar panels

If the above procedures seem to complicated, you can ask for a professional to help you in obtaining those permission documents as well

5. Trustworthy contractor

The last and the most important step is to select a contractor. If you do not get a professional contractor, you can never be sure that the performance of solar cells will meet your expectations. Therefore, comparing different contractors is essential to find the good one who has a long-term reputation and offer reasonable price for the installation. Below are things you should consider when comparing the contractors.

1.Reputation and experience


3.Solar panels manufacturers: we recommend use tier-1 solar panel (according to Bloomberg PV Module Maker2)

4.Warranty: which will be divided into 2 parts

•Warranty of installation service: should be 2 – 3 years  

•Warranty of product: should be at least 10 years as a standard

5.After-sale service: it is recommended to clean the solar panels once in every six months, so, you’d better find a company which you feel comfortable and convenient to keep in touch with

In conclusion, solar power has been gaining more and more momentum in recent years, and the benefits associated with it only make it more apparent that this is an option everyone should consider. As long as you check all of these points before deciding whether or not solar power is right for you, your decision will be a good one.


1 https://www.solarhub.co.th/solar-solutions/residential-solar/331-2016-04-16-15-50-18

2 https://review.solar/tier-1-solar-panels-list/