VinEnergo Plans Rooftop Solar and Storage Rollout Amid Vietnam’s Grid Strains

VinEnergo Energy Joint Stock Company, the newly formed energy subsidiary of Vingroup, has announced plans to deploy 43 megawatts (MW) of rooftop solar capacity and 45 megawatt-hours (MWh) of battery storage across three of the group’s manufacturing plants in Ha Tinh province.

The project, unveiled this week, will cover the VinFast automobile plant, VinES battery facility, and V-G High-Tech Energy Solutions within the Vung Ang Economic Zone, which the government aims to transform into a sustainable industrial hub.

Contribution to Net-Zero Goals

VinEnergo projects the systems will generate 50 million kilowatt-hours annually and cut 33,000 tonnes of CO₂ emissions per year, contributing to Vingroup’s target of reaching net-zero emissions by 2040 — a decade ahead of Vietnam’s national goal.

“This project symbolizes Vietnamese enterprises’ determination and innovation in achieving the nation’s net-zero target,” said Nguyen Huong Giang, Deputy General Director of VinEnergo.

Grid Congestion Challenges

Vietnam has rapidly risen as Southeast Asia’s solar leader, with installed capacity surging from just 86 MW in 2018 to nearly 18,000 MW by April 2025. However, analysts warn that aging grid infrastructure has not kept pace, leading to congestion and curtailment, particularly in the south.

VinEnergo aims to address some of these challenges by deploying the country’s first Direct Power Purchase Agreement (DPPA) model combining solar and storage, allowing renewable producers to sell electricity directly to corporate consumers and bypass some grid bottlenecks.

Testing New Ground

While Vietnam has successfully rolled out large-scale solar farms, integrating rooftop solar with industrial-scale battery storage remains largely untested. The company has yet to disclose the project’s investment value, though industry benchmarks suggest costs of $35–50 million. No commissioning timeline was provided, though similar projects typically require 12–18 months to complete.

Broader Energy Transition

Vietnam’s power demand rose 10.9% in the first nine months of 2024, keeping pressure on policymakers to expand both renewable and conventional generation. The country has set targets of 46–73 GW of solar capacity by 2030, far above earlier projections.

VinEnergo’s rollout, though relatively modest at 0.2% of current capacity, will test the viability of solar-plus-storage in industrial zones. Its outcome could shape future renewable deployments across Vietnam’s grid-constrained market.