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Floating solar in Southeast Asia: 5 GW pipeline emerges in 2026

Southeast Asia's floating photovoltaic pipeline crossed 5 GW in 2026, led by Vietnam, Indonesia, Thailand, and the Philippines. Reservoir and hydropower dam co-location accounts for 72% of the pipeline. Per-watt capex premium versus ground-mount has compressed to 12% from 25% in 2022.

By Priya Sharma··1 min read

In 50 words: Southeast Asia's floating solar pipeline crossed 5 GW in 2026, led by Vietnam, Indonesia, and Thailand. Reservoirs and hydropower dams account for 72% of projects. The per-watt premium over ground-mount has dropped from 25% to 12%, making floating PV competitive where land is constrained.

Pipeline by country

Combined operational + under-construction + announced floating solar capacity:

  • Indonesia: 2.1 GW (led by Cirata 145 MW operational, plus 1.9 GW under tender)
  • Vietnam: 1.4 GW (mostly reservoir-mounted, Da Mi 47.5 MW expansion)
  • Thailand: 800 MW (EGAT hydropower co-location program)
  • Philippines: 450 MW (Laguna Lake, Manila water reservoirs)
  • Others: 250 MW

Why floating, and why now

Three drivers:

  1. Land scarcity in dense Southeast Asian economies. Reservoir surfaces are unused, government-controlled real estate.
  2. Hydropower complementarity. Floating PV on hydropower reservoirs uses existing grid connection capacity, halving interconnection cost and timeline.
  3. Capex compression. Per-watt installed cost premium versus ground-mount dropped from 25% in 2022 to 12% in early 2026 as floaters scaled to MW volumes.

What developers need to know

  • Float supply. Two Korean and three Chinese float manufacturers dominate. Lead times 6–10 months for orders above 50 MW.
  • Anchoring. Reservoir depth and bottom conditions drive cost more than module choice. Site-specific anchoring engineering is non-negotiable.
  • Permitting. Reservoir/dam co-location typically requires hydropower operator consent + environmental clearance. Indonesia's PLN-led model has been replicated regionally.

What to watch next

Indonesia's next round of floating PV tenders (expected H2 2026) is sized at 1.0 GW. Pricing discovered in those tenders will set the regional benchmark for 2027 contracts.

Researched and drafted with AI assistance; reviewed and edited by the named editor within 24 hours of draft.

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