Significantly Lower Electricity Bills with Rooftop Solar

A Household Savings Story

In Bac Giang, Ms. Tran Thu Thuy invested around VND 200 million in an 18 kWp rooftop solar system paired with a 16.1 kWh energy storage unit. Thanks to a roof area of over 100 m² fully covered with panels, her family—whose regular usage includes air conditioners, an elevator, and daily household needs—cut their monthly electricity bill from VND 5–6 million down to about VND 600,000–800,000.

A rooftop fully covered with shiny solar panels, sunlight gleaming on the surface.

Pioneering Businesses Embrace Clean Energy

Not only households but many businesses are also adopting this solution to save costs and enhance sustainability. A case in point is Crystal Martin (Vietnam) Co., Ltd., which has commissioned a system of over 3 MW, meeting nearly 20% of the plant’s electricity demand. The company plans to raise total capacity to 5.4 MW by 2030—equivalent to 30% of consumption. In parallel, it targets a 35% reduction in CO₂ emissions by 2030 and carbon neutrality by 2050.

A large factory roof blanketed with solar panels.

A Growing Trend in Northern Vietnam

According to EVNNPC, nearly 700 MWp of rooftop solar is now operational across the North. Some provinces stand out: Thanh Hoa has nearly 66 MWp from more than 600 customers, while Yên Bái reports roughly 300,000 kWh fed into the grid. These figures reflect how rooftop solar is spreading throughout the community.

Technicians inspecting panels on a factory rooftop.

Expert View: Long-Term Benefits

Mr. Phạm Đăng An—Deputy CEO of Vu Phong Energy Group—emphasizes that self-generation and self-consumption via rooftop solar not only saves costs, but also strengthens brand reputation, supports ESG commitments, and boosts export competitiveness. At the macro level, expanding distributed renewables eases transmission pressure, reduces line losses, creates jobs, and accelerates the green economy.

An industrial park landscape with buildings covered in solar panels interwoven with greenery.

Support Policies and National Targets

Under Power Development Plan VIII, Vietnam aims that by 2030 at least 50% of households and 50% of office buildings will self-generate and self-consume electricity via rooftop solar. This aligns with annual electricity demand growth of 12–16%, especially as the North frequently faces overload risks during hot summer months.

👉 See details of the latest support program: Rooftop Solar 2025 – receive a VND 2.5 million subsidy

A happy family in front of a home whose roof is covered with solar panels.

Technology and Optimal Solutions

For long-term performance, households should prioritize Mono-PERC, half-cut cell, or n-type TOPCon panels for high efficiency and durability. For mid-scale systems, string inverters are a popular choice; businesses can add power optimizers as needed. Smart monitoring helps detect faults and improve operations. Notably, pairing with a Lithium LFP battery energy storage system (BESS) can significantly increase the self-consumption ratio.

Flexible Financing Options

Beyond self-investment, many companies can choose to lease systems from professional providers. In this model, the supplier covers investment, construction, and maintenance; the enterprise pays a usage fee per contract—no upfront capital required.

👉 Learn more about solar solutions for households or solar for farms/greenhouses to compare costs.

An engineer discussing a roof layout with the business owner over design drawings.

Solar Power—A Pillar of the Green Transition

Amid surging electricity demand, rooftop solar offers a dual solution: reducing costs and cutting emissions. It will be a key pillar in Vietnam’s energy transition and sustainable development over the coming decade.

👉 Contact DaihanCorp now for a free consultation, on-site survey, and an optimal rooftop solar solution for your home or business.

A consultant presenting green-energy solutions to a client.