Trinasolar has been selected to supply high-power solar modules for the Dầu Tiếng 5 floating solar and storage project in Tây Ninh Province, adding a named equipment supplier as one of Vietnam's largest renewable-energy developments moves into construction.
The company said in a 9 September release distributed by PR Newswire that it will provide 730 to 735W Vertex N n-type i-TOPCon modules for a 562MWdc array designed around 450MWac of generating capacity. Trinasolar did not disclose the contract value, number of modules or delivery schedule. Trinasolar via PR Newswire APAC
Those omissions matter for readers tracking execution rather than announcement volume. The project has already passed several visible milestones: developer DT5.1 Energy broke ground on 4 August and signed an engineering, procurement and construction contract later that month with a consortium of PowerChina, Sigma Engineering and Hoàng Liên Sơn. The module selection now fills in another part of the supply chain, although procurement and installation progress will still need to be demonstrated on site. XCE Energy
A large project with a 2027 target
DT5.1 Energy, a member of Xuân Cầu Holdings, is developing Dầu Tiếng 5 across roughly 645 hectares in a semi-submerged area of Dầu Tiếng Reservoir. The project owner's August announcement gives the plant a 450MW rating and says it is expected to produce about 808GWh of electricity a year after entering commercial operation in December 2027.
A later XCE Energy update describes 562.5MWp of installed solar capacity, alongside distributed inverters, battery energy storage and grid-connection infrastructure. The battery's capacity has not been disclosed publicly, so the storage element should not yet be treated as a quantified operating asset.
The 562MWdc and 450MWac figures describe different sides of the same project rather than competing estimates: direct-current module capacity is higher than the alternating-current rating at which the plant will deliver power. The 808GWh figure is a forecast, not measured generation.
The DPPA signal needs careful reading
Xuân Cầu has described Dầu Tiếng 5 as one of the first projects applying Vietnam's direct power purchase agreement mechanism. Under a DPPA, renewable generators can sell electricity to large users rather than relying only on the conventional utility-buyer route. Vietnam Government News
Vietnam Government News identifies a separate arrangement between the TTC Đức Huệ 2 solar plant and Samsung Electronics Vietnam Thai Nguyen as the first renewable generator and large electricity user operating under the grid-connected DPPA mechanism, from 1 June 2026.
For Dầu Tiếng 5, the commercial details needed to judge the power-sale arrangement remain absent: no buyer, contracted volume, tariff or agreement term was named in the supplier release or project-owner material reviewed by SEA Connect. The useful near-term signals will therefore be module-delivery evidence, progress against the EPC schedule, disclosure of the storage configuration and confirmation of the eventual off-taker structure.
What operators should watch
The immediate significance is the move from a project-level plan to named suppliers and contractors. For equipment vendors and developers across Southeast Asia, Dầu Tiếng 5 will also test construction and maintenance at scale in a humid, semi-submerged environment, where water management, access, cabling and environmental safeguards are practical delivery issues rather than marketing details.
The project remains forward-looking. Its annual output, commissioning date and DPPA role depend on construction, grid connection and contracting milestones still ahead. Trinasolar's selection is a credible procurement signal, but the stronger proof will come when equipment is delivered, installed and tied to a disclosed commercial-power arrangement.
How we sourced this
SEA Connect based this report on Trinasolar’s 9 September release distributed by PR Newswire APAC, project-owner and EPC announcements, and official Vietnamese DPPA context. Project output and commissioning figures are forecasts.