Solar panel cost in Phuket (2026)
— real prices in THB
Most solar websites in Thailand hide the numbers behind a contact form. This page does the opposite: the real 2026 price ranges we quote in Phuket, what moves them up or down, and how long each system takes to pay for itself — worked out in plain English.
In 2026, an on-grid rooftop solar system in Phuket costs roughly 150,000–220,000 THB for 3 kW, 220,000–320,000 THB for 5 kW and 350,000–500,000 THB for 10 kW (before VAT, no battery). Each kWp produces about 150 units per month, worth ~645 THB at the ~4.3 THB/unit that high-usage homes pay — so typical payback is 4–7 years, and a new law lets individuals deduct up to 200,000 THB from taxable income.
What a solar system costs in Phuket right now
On-grid systems (no battery), tier-one equipment — LONGi panels with Deye or Huawei inverters — installed, tested and PEA-permitted. Prices are before VAT.
| System size | Price range (before VAT) | Monthly production | Roof area needed | Suits |
|---|---|---|---|---|
| 3 kW | 150,000–220,000 THB | ~450 units | ~15–18 m² | Townhouse, small home |
| 5 kW | 220,000–320,000 THB | ~750 units | ~25–30 m² | Family home, daytime aircon |
| 10 kW | 350,000–500,000 THB | ~1,500 units | ~50–60 m² | Pool villa, large home |
| 15–20 kW+ | Quoted after survey — cost per kW drops with size | ~2,250–3,000 units | ~75–120 m² | Large villa, small hotel, business |
Production assumes Phuket's ~4.5–5 peak-sun hours per day, or about 150 units per kWp per month. Want a battery too? Storage adds roughly 4,000–5,000 THB per kWh of capacity — see our hybrid solar & battery guide for when it's worth it.
What moves the price up or down
Two 10 kW systems on two different roofs are not the same job. These are the factors that decide where in the range your quote lands.
This is also why we quote after a free site survey rather than selling fixed packages. A package price either hides margin for the easy jobs or springs surprise extras on the hard ones. After the survey you get a written, itemised quote in THB — equipment, labour, PEA paperwork, everything — with no obligation. Details of what's included are on our services page.
How fast does solar pay for itself?
Simple math: 1 kWp produces ~150 units a month, and high-usage Phuket homes pay ~4.3 THB per marginal unit under the progressive tariff tiers — so each kWp saves roughly 600–650 THB a month if fully self-consumed.
| Your monthly bill | Suggested system | Est. monthly saving | Simple payback |
|---|---|---|---|
| ~3,000 THB | 3 kW | up to ~1,900 THB | ~7–9.5 years |
| ~4,000–7,000 THB | 5 kW | up to ~3,200 THB | ~6–8.5 years |
| ~8,000–12,000 THB | 10 kW | up to ~6,400 THB | ~4.5–6.5 years |
| 12,000 THB+ | 15–20 kW+ | ~9,000 THB+ | often ~4–6 years (lower cost per kW) |
Two honest caveats. First, the savings assume you use the power as it's produced — homes with heavy daytime loads (pool pumps, daytime aircon, home offices) hit the fast end of the range; an empty house at noon does not. Second, surplus you export earns only 2.20 THB per unit under the PEA buy-back scheme, roughly half of what self-consumed power saves you, so we size systems for your own use first. For the full worked example — and the cases where solar is not worth it — read Is solar worth it in Thailand? The honest 2026 math, or try our savings calculator.
The 200,000 THB tax deduction changes the math
Under Royal Decree No. 805 (2026), individuals can deduct up to 200,000 THB (including VAT) of rooftop solar costs from their personal taxable income. The headline conditions: an on-grid system up to 10 kWp, installed between 3 March 2026 and 31 December 2028 by a VAT-registered installer issuing an official e-tax invoice; you must be a Thai tax resident (180+ days per year — foreigners qualify) and the person named on the electricity meter. Depending on your marginal Thai tax rate (5–35%), that deduction is worth up to 70,000 THB back — enough to shave a year or more off the payback of a typical system. Full conditions, a worked example and a document checklist are in our Thailand solar tax deduction guide for expats. We're installers, not tax advisors — confirm your own position with a tax professional.
Cost questions we hear most
How much does a 10 kW solar system cost in Phuket in 2026?
A 10 kW on-grid system (no battery) typically costs 350,000–500,000 THB before VAT in Phuket, using tier-one panels such as LONGi and Deye or Huawei inverters. It produces roughly 1,500 units (kWh) per month, worth about 6,400 THB at the ~4.3 THB per unit that high-usage Phuket homes pay — a simple payback of roughly 4.5–6.5 years.
Does the price include PEA paperwork and permits?
With Pearl Solar Energy, yes. Every quote we issue is itemised in THB and includes the design, equipment, installation, safety testing and all PEA (Provincial Electricity Authority) paperwork for a legal grid connection. When you compare quotes from different installers, always check whether PEA permitting is included — it is sometimes left out to make a headline price look lower.
How much does adding a battery cost?
Battery storage adds roughly 4,000–5,000 THB per kWh of capacity. A 10 kWh battery therefore adds around 40,000–50,000 THB to the system price. Batteries make sense if you use a lot of electricity in the evening or want backup power during grid outages — but if most of your usage is in daylight hours, an on-grid system without a battery usually pays back faster.
Can I reduce the cost with the 200,000 THB tax deduction?
Possibly, yes. Royal Decree No. 805 (2026) gives individuals a personal income tax deduction of up to 200,000 THB (including VAT) for a rooftop on-grid system up to 10 kWp, installed between 3 March 2026 and 31 December 2028 by a VAT-registered provider issuing an e-tax invoice. You must be a Thai tax resident (180+ days a year — foreigners qualify) and the person named on the electricity meter. We are installers, not tax advisors, so confirm your eligibility with a tax professional.
Why do you quote after a survey instead of selling fixed packages?
Because two 10 kW systems on two different roofs are not the same job. Roof material and structure, cable runs, shading, phase supply and inverter placement all move the real cost up or down. A fixed package price either hides margin for the easy jobs or springs surprise extras on the hard ones. Our site survey is free, and the written quote you receive afterwards is itemised in THB with no obligation.
Related reading: Is solar worth it in Thailand? · The 200,000 THB solar tax deduction · Solar for pool villas in Phuket · Selling power back to PEA
Get your exact number — free site survey
The tables above give you the honest ranges. A free survey of your roof and bills gives you the exact figure — a written, itemised quote in THB. We reply in English. No obligation.
Pearl Solar Energy Co., Ltd. · Phuket, Phang Nga (Khao Lak) & Krabi · Mon–Sat 08:00–17:00