As Thailand accelerates its transition to renewable energy, corporate buyers now have multiple ways to source green electricity. Two of the most important models are Utility Green Tariff (UGT) and Third-Party Access (TPA). Understanding the differences between UGT and TPA is essential for companies seeking cost-effective, reliable, and ESG-compliant energy solutions.
What is UGT (Utility Green Tariff)?
The Utility Green Tariff (UGT) is a national green energy procurement scheme regulated by the Energy Regulatory Commission (ERC). It allows corporate electricity consumers to procure bundled green electricity (Energy + I-REC Certificates) directly through Thailand’s state-owned utilities (Electricity Generating Authority of Thailand – EGAT, Metropolitan Electricity Authority – MEA, Provincial Electricity Authority – PEA).
What Is TPA (Third-Party Access)?
Third-Party Access (TPA) enables companies to procure electricity from private renewable energy generators while using the national grid for transmission. TPA is ideal for large energy consumers seeking customization and long-term cost optimization.
UGT vs. TPA in Thailand: Side-by-Side Comparison
UGT and TPA offer distinct approaches to renewable energy procurement in Thailand. UGT is a utility-managed solution where companies purchase green electricity directly from state-owned utilities under a simple, regulated tariff structure. It is easy to implement, highly reliable, and best suited for organizations seeking quick ESG compliance with minimal complexity.
Below is a table breakdown on difference of UGT vs TPA in Thailand:
TPA allows companies to source electricity from private renewable generators using the national grid for delivery. While this model offers greater flexibility and the potential for lower electricity costs, it involves more complex contractual arrangements, additional grid charges, and variable reliability depending on the chosen supplier.
Overall, TPA opens the door for companies to buy electricity directly from private renewable generators, offering greater flexibility and the potential for more competitive pricing. However, it also comes with added complexity from structuring multiple contracts to managing grid access and ensuring supplier reliability. While UGT remains the easiest way to get started with green energy, TPA is increasingly becoming the chosen route for large energy users looking for more control and long-term optimization in Thailand.
This is where Constant Energy comes in. As companies begin exploring TPA in Thailand, having the right partner is crucial to navigate both the commercial and technical challenges.
With a proven track record across Southeast Asia and established experience in Third-Party Access (TPA) projects in Europe, Constant Energy is well-positioned to support large energy users in Thailand as the market evolves. From pre-screened sites and secured grid capacity to a clear permitting pathway, Constant Energy offers a ready-to-deploy solution for corporations seeking customized, cost-efficient renewable energy through TPA. As grid capacity remains limited, early collaboration will be key and Constant Energy stands ready to partner with forward-looking businesses to unlock long-term, sustainable energy value in Thailand.
About Constant Energy
Constant Energy is a leading developer, owner, and operator of large-scale solar, wind, and battery storage projects across Asia. Founded in 2017, Constant Energy is an affiliate of the Virya Energy Group, a global renewable energy platform operating in more than 15 countries across Europe and Asia, with a team of over 1,100 members worldwide. Specializing in the long-term development and management of high-quality renewable energy assets, Constant Energy has built a growing portfolio of over 265 MW of solar projects across Thailand, Malaysia, and Vietnam. Supported by Virya Energy’s strong financial backing and industry expertise, the company upholds the highest standards of environmental, social, and governance (ESG) performance, as reflected in its 5-star GRESB rating and Gold rating from EcoVadis. The management team brings over 30 years of experience in private power projects.
More information can be found at https://constantenergy.net/
