Vingroup's VinEnergo Plans 550 MW Floating Solar on Ban Chat Reservoir

Overview

VinEnergo, the renewable energy arm within Pham Nhat Vuong’s Vingroup (VIC) ecosystem, is preparing two floating solar plants, Ban Chat 1 and Ban Chat 2, on the Ban Chat hydropower reservoir in Lai Chau province. The projects carry a combined design capacity of 550 MW and nearly 692,200 solar panels, with total disclosed investment of more than VND 11,600 billion. For VIC, the plan extends the group’s power-generation footprint beyond real estate and electric vehicles into utility-scale renewables.

Key Facts

• Ban Chat 1 has design capacity of 250 MW; Ban Chat 2 reaches 300 MW, for a combined 550 MW.
• The two plants together would deploy nearly 692,200 panels: about 322,000 at Ban Chat 1 and about 370,160 at Ban Chat 2.
• Total investment is disclosed on VinEnergo’s project list at more than VND 5,368 billion for Ban Chat 1 and more than VND 6,279 billion for Ban Chat 2, or over VND 11,600 billion combined (about USD 464 million).
• The April 2026 project documents cited roughly VND 8,600 billion for the two projects, meaning the disclosed cost has risen by about VND 3,000 billion.
• Ban Chat 1 covers about 704 ha, of which roughly 626.6 ha is reservoir surface; Ban Chat 2 covers more than 813 ha, of which about 771.2 ha is water.
• The existing Ban Chat hydropower plant on the Nam Mu river has 220 MW of capacity from two 110 MW units and has generated since 2013, with a reservoir of about 2.14 billion cubic metres.
• The projects are expected to connect to the regional grid via 35 kV and 220 kV lines.

What Happened

The plans were disclosed through environmental impact assessment filings and VinEnergo’s updated project list on its website. Ban Chat 1 and Ban Chat 2 are legally separate projects but are both sited on the reservoir of the Ban Chat hydropower plant. The floating design places panels on existing water surface rather than requiring hundreds or thousands of hectares of new land, and allows partial use of energy and transmission infrastructure already built around the hydropower site. At 550 MW, the solar cluster would be about 2.5 times the capacity of the existing 220 MW hydropower plant on the same reservoir.

The investment figures have been revised upward. Documents published in April 2026 put the two projects at about VND 8,600 billion, while the current VinEnergo project list shows more than VND 11,600 billion. The filings do not disclose a construction start date, financing structure, or power purchase agreement terms.

Market Context

VIC trades on HOSE and closed at VND 247,700 on 10 September 2026. Vingroup’s core business remains real estate through Vinhomes, alongside VinFast in electric vehicles and a growing energy portfolio under VinEnergo. Floating solar is a small but expanding segment of Vietnam’s power mix, and projects of this scale on existing hydropower reservoirs are rare in Southeast Asia. The article compares the Ban Chat cluster with Indonesia’s Citara floating solar project, describing the Vietnamese plan as roughly double its size.

Strategic Significance

The strategic case rests on hybrid hydro-solar operation. Pairing floating solar with an existing reservoir lets VinEnergo reuse transmission infrastructure and water surface, potentially lowering land acquisition costs and permitting friction relative to onshore solar. For Vingroup, the projects add contracted generation capacity that can support group electricity demand, including EV charging and manufacturing, while building a track record in renewables. The main risks are grid connection timing, the higher revised cost base, and Vietnam’s evolving power pricing framework for floating solar.

What to Watch

• Formal construction start dates and any investment approval decisions for Ban Chat 1 and Ban Chat 2.
• Power purchase agreement terms and the feed-in tariff or auction mechanism applied to the 550 MW.
• Grid connection progress on the 35 kV and 220 kV lines into the regional network.
• Vingroup or VinEnergo disclosures on financing, including any debt or convertible instruments tied to the VND 11,600 billion programme.
• VIC quarterly results and any segment reporting that separates VinEnergo’s contribution from real estate and EV operations.