Thailand’s 51% Renewable Energy Target: Can We Get There?

Thailand’s 51% renewable target has a problem most coverage skips: it was never approved. The draft Power Development Plan 2024 promised a 51% renewable share by 2037 (EXRI (Energy Exchange Research Institute)). It went to a public hearing, then stalled. A new draft now aims for about 49% clean energy by 2037 instead (Nation Thailand).

So can Thailand actually get there? That depends on where you start counting. Ember puts Thailand’s low-carbon electricity at 17% in 2025 (Ember), well below the global average of 43% (Ember). Closing that gap in about 12 years would take a build-out the country has never attempted. Here’s what the numbers say, where the plan looks weakest, and what it means for households.

TL;DR: Thailand’s 51% renewable target came from a draft plan that was never approved. Its replacement, draft PDP 2026, aims for about 49% clean power by 2037 (Nation Thailand). Starting from 17% low-carbon generation in 2025, Thailand needs more than 2,000 MW of new solar a year, plus major grid spending, to get there.

What Is Thailand’s 51% Renewable Energy Target?

The 51% figure comes from the draft PDP 2024, which covered 2024 to 2037. It planned 34,851 MW of new renewable capacity (EXRI (Energy Exchange Research Institute)), led by 24,412 MW of solar (EXRI (Energy Exchange Research Institute)). The Energy Ministry held a public hearing on it in June 2024. Neither the National Energy Policy Council (NEPC) nor the Cabinet ever signed it off.

The plan’s other pieces were just as big. It added 5,345 MW of wind (EXRI (Energy Exchange Research Institute)) and 10,485 MW of battery storage (EXRI (Energy Exchange Research Institute)). Ember estimated the package would need $153 billion in fixed spending between 2024 and 2037 (Ember). That’s a large bill for a plan that never became official policy.

What does “51%” actually measure?

The fine print matters. Ember describes the goal as 51% of total electricity demand coming from renewables (Ember), not 51% of what Thai power plants generate. That’s a real difference here. Imports from Laos covered 15% of Thailand’s electricity demand in 2024 (Ember), and clean imports can count toward a demand-based share.

Here’s the practical upshot. A demand-based target lets Thailand reach a headline number partly by buying clean power across the border. That’s legitimate, but it isn’t the same as building renewables at home. When you see “51%” and “17%” quoted side by side, they aren’t measuring the same thing. One counts demand, the other counts domestic generation.

Where Does Thailand Stand Today?

Thailand generated just 17% of its electricity from low-carbon sources in 2025 (Ember). Fossil fuels made up the other 83% (Ember). Solar and wind together supplied only 7% (Ember). The honest starting point is well under a fifth of the power mix.

Natural gas is the incumbent. It supplied around 68% of generation in 2024 (Ember). And much of that gas now arrives by ship. Imported LNG made up about 40% of Thailand’s gas mix in 2024, and that share is expected to reach 60% by 2035 (Ember). Every extra shipload exposes Thai power prices to global gas markets.

How does that compare with the neighbours? Vietnam generated 45% of its electricity from low-carbon sources in 2025 (Ember). Malaysia sat at 21% (Ember). Thailand, with some of the best solar resources in the region, trails both. Solar and wind alone give Vietnam 12% of its power (Ember), against Thailand’s 7%.

There’s one hopeful sign. Thailand recorded the second-largest drop in gas generation anywhere in 2025, down 9.6% (Ember Global Electricity Review 2026). One good year isn’t a trend, though. It could reflect weather, imports, or demand as much as new renewables.

What Is Actually Producing Thailand’s Renewable Power?

Most of Thailand’s renewable electricity doesn’t come from solar panels. In 2023, renewables produced 43,179 GWh (IRENA Energy Profile: Thailand), about 21% of generation. Bioenergy supplied 27,972 GWh of that (IRENA Energy Profile: Thailand). Solar added just 5,439 GWh (IRENA Energy Profile: Thailand), hydro 6,247 GWh (IRENA Energy Profile: Thailand) and wind 3,521 GWh (IRENA Energy Profile: Thailand).

That means bioenergy made up roughly 65% of Thailand’s renewable generation (our calculation from IRENA figures). Much of it comes from farm and factory waste, such as sugarcane residue, rice husk and biogas. That supply is tied to harvests and agro-industry, so it can’t scale the way solar can.

Why does that matter for the target? Biomass can’t grow fast enough to carry the next 30 points. Every serious pathway to 49% or 51% leans on solar power and battery storage. The question is whether solar can grow several times over in a decade.

How Did the New Draft PDP 2026 Change the Plan?

The draft PDP 2026 replaced the 2024 version and runs all the way to 2050. It maps 50,900 megawatts of new capacity for 2026 to 2037 (Nation Thailand). Clean energy should reach about 49% of the system in 2037, rising to 65–89% by 2050 (Nation Thailand). Its public hearing took place on 8 September 2026.

It isn’t approved yet. After the hearing, the draft goes to the NEPC and the Cabinet (Nation Thailand). As of late September 2026, neither body has approved it. Even once they do, it stays a target, not a legal requirement. Treat every 2037 number below as planned, not guaranteed.

The solar goal barely moved, at 24,300MW (Nation Thailand). Wind was cut to 2,700MW (Nation Thailand), roughly half the old plan. Battery storage rose to 14,500MW (Nation Thailand), a 38% increase on the 2024 draft (our calculation from EXRI and Nation Thailand figures). The new plan also envisages up to 9,000MW of small modular nuclear by 2050 (Nation Thailand).

Notice the wording shift, too. The old plan targeted “renewables.” The new one targets “clean energy,” a broader label that can take in nuclear. So the drop from 51% to 49% probably understates how much the renewables-only ambition changed. It’s a different yardstick, not just a slightly lower number.

Can Thailand Build Solar Fast Enough?

The new plan’s 24,300MW of solar (Nation Thailand) works out to more than 2,000 MW a year from 2026 to 2037 (our calculation from Nation Thailand figures). That’s about 3.5 times the solar Thailand had installed at the end of 2025 (our calculation from Nation Thailand and IRENA figures). IRENA counted 6,842 MW of solar at that point (pv magazine (citing IRENA)).

Is that pace realistic? The IRENA figures show solar at 3,388 MW at the end of 2024 (pv magazine (citing IRENA)), so the jump to 6,842 MW looks huge. Be careful with it. Part of the increase likely reflects better counting of rooftop systems, not a single record year. Ember’s own figure for 2024 was just 3.4 GW (Ember).

The economics favour speed. Global average solar costs fell to $0.043/kWh in 2024, according to IRENA (pv magazine (citing IRENA Renewable Power Generation Costs in 2024)). Thailand’s procurement pipeline is growing, too. A 2022 auction targeted 5,203 MW of renewables (Baker McKenzie via Global Compliance News). A follow-up round in 2024 added 2,180 MW (Baker McKenzie via Global Compliance News).

Private buyers can help. The draft plan targets 10,000 megawatts of rooftop solar (Nation Thailand). Direct power purchase deals are currently capped at 2,000MW, and the NEPC wants that expanded (Nation Thailand). Factories and data centres signing their own clean power contracts could add capacity without waiting for state auctions.

What Stands in the Way?

The grid is the biggest obstacle. Grid upgrades for the new plan could cost 300–700 billion baht (Nation Thailand), including smart-grid systems and equipment to keep the network stable. Solar output peaks at midday and vanishes at night. Related: solar curtailment. Without storage and stronger transmission, more panels just mean more wasted power.

Then there’s money and politics. The old plan’s $153 billion price tag (Ember) never got a green light. Thailand also still depends on gas contracts and power plants built for decades of use. And a plan that has already been rewritten once could be rewritten again after the next election.

Our read of the numbers: getting from 17% to 49% means adding about 32 percentage points of clean power in roughly 12 years (our calculation from Nation Thailand and Ember figures). It isn’t impossible. Vietnam’s 45% low-carbon share shows what a neighbour with similar sunshine has already reached. But Thailand needs approval, grid money and faster permitting all at once.

What Does This Mean for Households?

Homeowners can already play a small part. Thailand’s household rooftop solar round, Solar Phak Prachachon 2569, has a national cap of 500 MW (MEA). It buys exported power at 2.20 THB/kWh (MEA) under net billing. Applications opened in July 2026 on a first-come, first-served basis, so the quota can fill.

The bigger impact is on your bill. With gas at around 68% of generation (Ember), Thai electricity prices track LNG costs. A faster shift to solar and storage would reduce that exposure over time. A slower one leaves households paying for imported fuel. If you’re thinking about rooftop solar, don’t wait for 2037. The savings come from displacing your own daytime use today.

Frequently Asked Questions

Is Thailand’s 51% renewable energy target official?

No. The 51% goal came from the draft PDP 2024, which held a public hearing but was never approved by the NEPC or Cabinet (EXRI (Energy Exchange Research Institute)). It has been replaced by draft PDP 2026, which aims for about 49% clean energy by 2037 (Nation Thailand). That new draft also still awaits approval.

What share of Thailand’s electricity is renewable today?

Ember reports that 17% of Thailand’s electricity came from low-carbon sources in 2025 (Ember). Using a broader measure, IRENA counted renewables at about 21% of generation in 2023 (IRENA Energy Profile: Thailand). Bioenergy supplies most of it. Solar and wind together provided only 7% of generation in 2025.

How much solar does Thailand need to hit its target?

The draft PDP 2026 plans 24,300MW of new solar between 2026 and 2037 (Nation Thailand). That’s more than 2,000 MW a year. Thailand had 6,842 MW installed at the end of 2025 (pv magazine (citing IRENA)), so the plan means building several times today’s fleet within about a decade.

Does the target count electricity imported from Laos?

It can. Ember describes the old 51% goal as a share of total electricity demand (Ember). Imports from Laos met 15% of Thailand’s demand in 2024 (Ember), so clean imports can help a demand-based target. Domestic generation figures, like Ember’s 17%, don’t include them.

When will Thailand reach net zero?

The Cabinet approved Thailand’s updated climate pledge, NDC 3.0, which brings the net-zero goal forward to 2050 (Nation Thailand). The earlier target was 2065. Reaching it depends heavily on the power sector, where fossil fuels still produced 83% of electricity in 2025 (Ember).

Conclusion: A Moving Target, Still Within Reach

Thailand’s renewable goal is ambitious, but it keeps shifting. Here’s where things stand:

• The 51% target from draft PDP 2024 was never approved.
• Draft PDP 2026 aims for about 49% clean energy by 2037 and still awaits NEPC and Cabinet sign-off.
• Thailand starts from 17% low-carbon generation, with gas at around 68%.
• Hitting the goal means more than 2,000 MW of new solar a year, plus a 300–700 billion baht grid upgrade.
• Households can join now through the 500 MW rooftop solar buyback round.

Can Thailand get there? The resources and the costs say yes. The approvals, grid spending and politics will decide. Watch whether the Cabinet signs off on PDP 2026, and whether solar installations keep climbing in 2026 and 2027. Those two signals will tell you more than any headline percentage.