Solar panel prices in Thailand (2026)

An installed on-grid home solar system in Thailand costs roughly 3 kW 110,000–200,000 THB · 5 kW 140,000–255,000 THB · 10 kW 230,000–400,000 THB, including panels, inverter and installation.

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Solar panels on a metal sheet roof
Sergio Martins / Unsplash

Which size for your bill

Monthly billSuggested sizeSaving + export/monthPayback
1,500 THB3 kW1,334 THB6.9–12.5 years
2,500 THB3 kW1,605 THB5.7–10.4 years
4,000 THB5 kW2,608 THB4.5–8.1 years
6,000 THB10 kW4,643 THB4.1–7.2 years
8,000 THB10 kW5,138 THB3.7–6.5 years

Assumes 50% daytime use, PEA area, as of 31 Oct 2026.

What's included

  • Panels and mounting
  • On-grid inverter
  • Cabling, protection devices and labour
  • Usually the utility permit application (confirm with the installer)

Usually not included: batteries, roof reinforcement and meter replacement.

Why quotes vary so much

Panel and inverter brands, roof type (metal sheet is easier than tile), building height and the installation warranty can nearly double the price of the same size system. Compare at least three quotes from registered installers.

Installed solar prices by system size

SizeTypical price (THB)Output / month
3 kW 110,000–200,000~420 kWh
5 kW 140,000–255,000~700 kWh
10 kW 230,000–400,000~1,400 kWh

Compiled from Thai news and bank guides. Actual quotes depend on panel and inverter brand and on your roof. · As of 31 Oct 2026

Government incentives

  • Sell surplus power back at 2.20 THB/kWh on a 10-year contract
  • 500 MW national quota
  • Personal income tax deduction up to 200,000 THB (on-grid ≤10 kWp, until 31 Dec 2028)
  • Export is capped at 5 kW per meter
  • People’s Solar subsidy of 50,000 THB per person, registration until 31 Jan 2027 (cannot be combined with the tax exemption)

As of 31 Oct 2026 · Check the latest MEA/PEA announcement before installing

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Frequently asked questions

How much is a 5 kW solar system in Thailand?

About 140,000–255,000 THB installed, on-grid (as of 31 Oct 2026).

How much does 1 kW of solar cost in Thailand?

Small systems carry high fixed costs (inverter, labour, permits), so the price per kW is higher. Most homes start at 3 kW.

How much do solar installers in Thailand charge, and how do I choose one?

An installed 5 kW system typically costs 140,000–255,000 THB including equipment. Pick an installer registered with MEA or PEA, panels with the TIS 61730 mark, permits included in the quote and a written installation warranty. Compare at least three quotes.

Can I pay for solar in instalments?

Several Thai banks offer solar loans or card instalments. Compare the interest with your monthly savings from the calculator.

Sources

  1. Thansettakij: 5 kW rooftop solar cost
  2. Krungsri: Solar cells to reduce electricity bills
  3. Thairath: Solar installation cost and tax deduction

Methodology and sources