About Us
OK Solar by PSTC
Operated by PST Energy 1 Co., Ltd., a subsidiary of Power Solution Technologies Public Company Limited (PSTC) a leading investor and service provider in renewable energy and nationwide power distribution systems.
With over 10 years of experience in the renewable energy industry, we are trusted experts in solar power development and investment. Our team specializes in Solar Farm projects, supplying electricity to the Provincial Electricity Authority (PEA) and the Metropolitan Electricity Authority (MEA). We also invest in Private PPA solar rooftop systems and provide Engineering, Procurement, and Construction (EPC) services for factories and commercial buildings.
Our Services
Comprehensive Solar Solutions by a Professional Team
OK Solar by PSTC provides end-to-end solar services from system design and on-site surveying to professional installation and setup. We also offer reliable after-sales service and continuous system maintenance, ensuring you achieve maximum energy savings and long-term sustainability.
Design and Survey
Our expert engineering team conducts thorough on-site surveys and designs a solar system tailored to your energy needs, ensuring the best performance and maximum cost-efficiency.
Applying for a Permit
We manage all required documents and handle permit submissions with relevant authorities, such as the Provincial Electricity Authority (PEA) and the Metropolitan Electricity Authority (MEA).
O&M Service
We provide comprehensive inspection, maintenance, and system optimization services to ensure your solar system operates efficiently and delivers long-term performance.
Our Products
High-Quality Solar Solutions Easy Installation & Energy Savings
We offer a wide range of products to meet every clean-energy requirement. All equipment meets high standards and utilizes modern technology to help you save energy, reduce long-term costs, and minimize environmental impact in a sustainable way.
Solar Rooftop Installation Package
Electrical system
Installing
Solar panels
Installation area
Current electricity rate
Save electricity bills
Payback period
Package price
Special price
*Price does not include VAT.
| Electrical system | 1 phase | 3 phase | |||||
|---|---|---|---|---|---|---|---|
| Installing | 3 Kw | 5 Kw | 10 Kw | 5 Kw | 10 Kw | 15 Kw | 20 Kw |
| Solar panels | JA Solar Tier 1 Standard Model: JAM72D42 LB n-type 630 W, 5 panels | JA Solar Tier 1 Standard Model: JAM72D42 LB n-type 630 W, 8 panels | JA Solar Tier 1 Standard Model: JAM72D42 LB n-type 630 W, 16 panels | JA Solar Tier 1 Standard Model: JAM72D42 LB n-type 630 W, 8 panels | JA Solar Tier 1 Standard Model: JAM72D42 LB n-type 630 W, 16 panels | JA Solar Tier 1 Standard Model: JAM72D42 LB n-type 630 W, 24 panels | JA Solar Tier 1 Standard Model: JAM72D42 LB n-type 630 W, 32 panels |
| Installation area | 15-20 sq m. | 24-30 sq m. | 48-60 sq m. | 24-30 sq m. | 48-60 sq m. | 72-80 sq m. | 90-120 sq m. |
| Current electricity rate | 2,000-4,000 ฿/month | 4,000-8,000 ฿/month | 8,000-14,000 ฿/month | 4,000-8,000 ฿/month | 8,000-14,000 ฿/month | 14,000-20,000 ฿/month | >20,000 ฿/month |
| Save electricity bills | 1,500 ฿/month | 2,400 ฿/month | 4,800 ฿/month | 2,400 ฿/month | 4,800 ฿/month | 7,200 ฿/month | 9,000 ฿/month |
| Payback period | 5-6 Year | 4-5 Year | 3-4 Year | 4-5 Year | 3-4 Year | 3-4 Year | 3-4 Year |
| Package price | Starting 99,9900 ฿ | Starting 125,000 ฿ | Starting 225,000 ฿ | Starting 145,000 ฿ | Starting 235,000 ฿ | Starting 305,000 ฿ | Starting 350,000 ฿ |
| Special price *Price does not include VAT. | 89,910.- *Until March 31, 2026 | 112,500.- *Until March 31, 2026 | 202,500.- *Until March 31, 2026 | 130,500.- *Until March 31, 2026 | 211,500.- *Until March 31, 2026 | 274,500.- *Until March 31, 2026 | 315,000.- *Until March 31, 2026 |
Warranty
- 12 year warranty for PV solar panels (according to manufacturer’s terms)
- 30 year performance guarantee with electricity generation not lower than 80% (per manufacturer’s conditions)
- 10 year inverter warranty (according to manufacturer’s terms)
Solar Rooftop Installation Package
- Handling permit applications with electricity authorities and relevant agencies
- Free! Cleaning and on-site inspection service, twice per year, for 2 years
- Free! System monitoring and performance tracking of your solar power system via the website and FusionSolar application
Fill in the details to assess electricity usage
(Calculation)
Articles / News
Information on Solar Energy and Solar Technology
In 2025, investing in solar is a worthwhile decision as the cost of solar system installation continues to become more
Installing a solar system at home not only allows you to immediately save on electricity costs, but also helps reduce
Installing solar for your business is an excellent way to reduce energy costs, but there are important considerations to keep in mind.
Thank you to all our customers for your trust.
