PEA's 2026 rooftop solar buyback scheme: what it means for a Koh Phangan villa's running costs

Can a villa owner on Koh Phangan join Thailand's 2026 rooftop solar buyback scheme? Yes. The island is served entirely by the Provincial Electricity Authority (PEA) — not the Metropolitan Electricity Authority, which only covers Bangkok, Nonthaburi and Samut Prakan — so PEA's new Solar Rooftop Power Purchase Scheme for Households applies here on the same terms as everywhere else in PEA's territory. Applications opened 1 July 2026 and stay open until 30 November 2027.

What's actually on offer

• Eligibility — Type 1 (residential) electricity users only. The applicant's name must match the name on the registered PEA meter for the property; you must own the meter account, not merely occupy the address.
• Roof-mounted only — the panels must sit on the roof, a rooftop deck, or another part of a residential building already in use. Ground-mounted arrays on a plot of land don't qualify for this scheme.
• Capacity cap — a maximum of 5kW AC of export capacity per meter/applicant.
• Buyback rate — 2.20 baht per kWh of surplus exported to the grid, fixed for a 10-year contract measured from the scheduled commercial operation date (SCOD).
• Fee — a 2,000 baht (excluding VAT) charge for PEA's study, inspection and grid-connection process, payable after your application clears preliminary review.
• National scale — the government raised its purchase cap from 90MW to 500MW for this round, allocated first-come, first-served, with further rounds expected once a quota fills.

Does the math work out for a villa

The 2.20 baht/kWh buyback rate is well below the roughly 4–5 baht/kWh a residential customer pays PEA for grid electricity, so treating this as a straightforward sell-power-back investment understates the real return. The genuine value is self-consumption: every kWh your panels generate and you use directly — running the pool pump, water pump, fridges and daytime air-con — is a kWh you don't buy from PEA at the full retail rate. Only the surplus left over after your own use gets exported and paid at 2.20 baht. A system sized to your villa's daytime load (pumps, common-area lighting, any daytime AC use) captures far more value than one sized hoping to profit mainly from grid sales, since a Phangan villa that's occupied mostly by evening — with AC load concentrated after dark, once the sun isn't generating — will export more of its solar output at the lower rate rather than self-consuming it.

A separate 2026 change: the progressive tariff cut

On 29 April 2026 Thailand's National Energy Policy Council approved a second, unrelated measure worth knowing about alongside the solar scheme: a progressive electricity tariff structure for residential customers, expected to cut bills for roughly 90% of households (about 21 million accounts) — around 20% for consumption up to 200 units/month and around 10% for consumption up to 400 units/month. The same package also promised simplified rooftop-solar permitting, targeting approval within 7 days for self-use-only installations and 30 days for grid-connected ones, with utilities offering one-stop service. These are policy targets rather than a guarantee of a specific processing time on the island, so budget for some lead time regardless.

Practical steps for an owner on the island

• Confirm your PEA account first — the applicant name must match the registered meter owner. If the villa's meter is still in a builder's or previous owner's name, transfer it before applying.
• Apply through PEA's PPIM portal (ppim.pea.co.th) any time between 1 July 2026 and 30 November 2027, then pay the 2,000 baht (+VAT) inspection fee once your application passes preliminary review.
• Understand this is net billing, not simple net metering — you're paid only for verified surplus export, at 2.20 baht/kWh, not for your gross generation.
• Check single-phase vs three-phase supply on your meter before sizing a system, particularly if you run a pool pump or other high-load equipment — see Utilities on Koh Phangan for how island power supply itself works.
• Factor the running-cost savings into your ownership numbers alongside land tax and other holding costs — see Owner's taxes: annual land tax and tax on taking income out.

The 2026 scheme is a real, usable programme for a Koh Phangan villa owner, not a mainland-only initiative — but the sell-back rate is a modest bonus on top of the main benefit, which is cutting your own daytime grid draw.