How much is a 10 kW solar system in Thailand?

A 10 kW on-grid system costs about 230,000–400,000 THB installed and produces around 1,400 kWh a month. For a home using 1,200 kWh it pays back in roughly 4.4–7.6 years.

Last updated · Assumes 50% daytime use, PEA area.

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A house with a solar roof
Markus Winkler / Unsplash
Price
230,000–400,000 THB
Output
~1,400 kWh/month
Savings + export
4,375 THB/month
Payback
4.4–7.6 years

Solar payback calculator

THB
Set higher if you work from home, run a shop or use AC in the daytime

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Assumptions
    Rates and prices as of 31 Oct 2026

    Who a 10 kW system suits

    Large homes, home offices or shops with heavy daytime use and bills above 5,000 THB a month.

    Roof area needed: roughly 50–60 m².

    Watch the export cap

    Reports say exports may be capped at 5 kW per meter . If enforced, a 10 kW system earns less from exports, so size it mainly to your daytime use.

    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 10 kW solar system in Thailand?

    About 230,000–400,000 THB installed (as of 31 Oct 2026).

    How many kWh does a 10 kW system produce per day?

    About 47 kWh a day, or 1,400 kWh a month, depending on roof direction, shading and season.

    How many air conditioners can 10 kW run?

    A 12,000 BTU unit draws about 1 kW while running. A 10 kW system can support roughly 9 units in good sun, but not all day.

    Sources

    1. Thansettakij: 5 kW rooftop solar cost
    2. Krungsri: Solar cells to reduce electricity bills
    3. Naewna: Output and savings by system size

    Methodology and sources