Belgium Solar Power Market Outlook to 2031

The Belgium solar power market reached approximately 10.4 GW of cumulative installed PV capacity by the end of 2025, with Belgium reaching 1,098 W of installed solar capacity per capita, placing it among the EU's top 10 markets on a per-capita basis.

Market growth continues to be supported by high solar penetration, distributed rooftop deployment, increasing commercial and industrial adoption, and growing integration of battery energy storage systems (BESS). Belgium also increases its ambition by 1.1 GW in its updated 2030 solar target, strengthening the long-term policy outlook for PV investment.

The Belgium Solar Power Market is entering a more mature phase, with growth moderating after the strong expansion of previous years. Belgium is no longer classified among the EU's GW-scale solar markets for 2025 because of slower market growth, indicating a normalisation in annual deployment.

At the same time, grid congestion, limited connection capacity, declining solar capture prices and the increasing need for flexibility are becoming important constraints. These conditions are encouraging greater adoption of BESS alongside solar PV. Belgium is already emerging as a leading European utility-scale battery market, with stronger-than-expected deployment in 2025.

As Belgium advances its decarbonisation and electrification objectives, the solar market is expected to benefit from continued investment in commercial and industrial PV, utility-scale projects, solar-plus-storage systems and grid-flexibility solutions.

Market Definition

The Belgium Solar Power Market comprises the development, installation, operation and expansion of solar photovoltaic (PV) systems used for electricity generation within Belgium. The market covers grid-connected PV installations across residential, commercial, industrial and utility-scale applications.

The residential systems are generally defined as installations below 10 kW, commercial systems below 250 kW, industrial systems below 1 MW, and utility-scale systems above 1 MW, primarily ground-mounted.

The market includes both rooftop and ground-mounted solar installations, encompassing systems deployed for self-consumption, electricity supply to the grid and large-scale power generation. It also considers technological developments such as crystalline-silicon PV modules, inverters and associated balance-of-system components.

Battery energy storage is considered an adjacent enabling technology rather than part of the core solar PV market, although its integration increasingly supports solar deployment by improving flexibility and grid integration.

Current Scenario

Belgium’s solar market reached a record production milestone in 2025, with generation increasing by over 20% compared to the previous year. However, the sector faces a significant slowdown in new installations; residential demand in Flanders plummeted by 46% following the end of "reversing meter" incentives.

This overproduction during low-demand periods caused a record 520 hours of negative electricity prices in 2025. Consequently, the market is shifting toward self-consumption and flexibility, highlighted by the March 2026 inauguration of Europe’s largest 31 MW floating solar plant for industrial use.

Domestic manufacturing is supported by Belga Solar’s 100 MW TOPCon module factory in Wallonia. Belgium currently operates approximately 10 GW of capacity, with updated national targets aiming for 18 GW by 2030. Despite these goals, grid congestion and long connection delays remain major structural obstacles to further deployment.

Drivers 

Rising PV Competitiveness

The improving cost competitiveness of solar photovoltaic (PV) generation is a key driver of the Belgium solar power market.

Declining technology costs, manufacturing scale, efficiency improvements and stronger supply-chain competition have reduced the cost of producing solar electricity, making PV increasingly attractive across residential, commercial and utility-scale applications.

The cost advantage is particularly relevant in Belgium, where relatively high electricity prices can strengthen the economics of generating electricity locally and using it for self-consumption.

The latest available European LCOE benchmarks indicate that Belgium’s solar generation costs remain competitive across market segments. In Belgium, the indicative 2026 LCOE is EUR 42- 62/MWh for utility-scale PV, EUR 58- 82/MWh for commercial systems and EUR 88- 140/MWh for residential systems.

The utility-scale range demonstrates the relatively low cost at which large PV projects can generate electricity, while commercial systems also benefit from economies of scale compared with smaller residential installations.

The downward trajectory of solar LCOE is being supported by economies of scale, technological improvements and increasing market competition, with the cost decline particularly pronounced for utility-scale projects.

At the equipment level, continued reductions in PV module costs further improve project economics and lower upfront investment requirements. Supply-chain also highlights the role of manufacturing improvements and economies of scale across polysilicon, wafer, cell and module production.

For Belgium, this cost competitiveness supports continued investment in rooftop, commercial and larger-scale PV projects, despite the market becoming more mature.

It also strengthens the case for solar-plus-storage solutions, as declining PV generation costs can be combined with batteries to improve self-consumption and manage periods of low or negative electricity prices.

Falling LCOE and improving technology economics are helping solar PV remain a commercially viable source of new electricity generation in Belgium.

Restraint

Grid Congestion and Connection Constraints

Grid congestion has emerged as a significant structural restraint on Belgium’s solar power market, as the country’s electricity infrastructure is facing rapidly increasing connection requests from both new generation and electrification-driven demand.

The pressure is no longer limited to renewable projects: heat pumps, electric vehicles, battery parks and data centres are all competing for limited grid capacity. In March 2026, the number of projects unable to obtain conventional grid connections had increased from 35 in March 2025 to 650, with battery-related projects accounting for an even larger share of connection pressure.

Prolonged connection delays could postpone or cancel investment projects and slow the deployment of sustainable technologies.

The connection queue has also expanded substantially. Belgium’s transmission-grid connection queue is now reported to be nearly five times larger than peak electricity demand. Connection studies increased from approximately 45 in 2020 to around 280, while the average waiting time for such studies has reached approximately 200 days.

The increase reflects not only electrification but also speculative requests for scarce grid-hosting capacity and rapidly growing demand from battery storage and data centres.

Battery projects provide a particularly clear example. Belgium’s earlier grid-development planning anticipated approximately 3 GW of battery storage by 2034, whereas around 10 GW of battery capacity is already reserved, with another 20 GW under study.

Similarly, data-centre demand has exceeded earlier expectations: around 17 TWh of capacity is already reserved or under study, compared with an earlier planning assumption of 8 TWh by 2034.

For solar developers, this creates a direct constraint because available grid-hosting capacity, connection-study delays and physical network expansion can affect project timelines and investment certainty.

Physical connection delivery is additionally constrained by permitting delays, limited technical resources and supply-chain bottlenecks. Consequently, even where solar generation is economically competitive, insufficient grid capacity can limit the pace at which new PV capacity is connected.

Market Segmentation

The Belgium solar PV market can be segmented into Residential and Non-Residential & Utility based on the type and scale of deployment. Belgium is predominantly a distributed solar market, reflecting its high land-use and geographical constraints.

This segment comprises small-scale rooftop PV systems installed on individual houses and residential buildings, primarily for self-consumption and reduction of household electricity costs. Generally residential PV is classified as systems below 10 kW, although country-specific thresholds can vary.

The segment is important in Belgium because rooftop deployment allows households to generate electricity without requiring significant additional land. However, residential deployment is increasingly influenced by electricity-price levels, support mechanisms, self-consumption economics and the availability of battery storage.

This segment covers commercial and industrial rooftop installations as well as utility-scale ground-mounted PV projects. Commercial and industrial systems are typically installed by businesses to reduce electricity expenditure and increase self-consumption, while utility-scale projects primarily generate electricity for sale to the grid or under PPAs.

Belgium's market remains largely distributed, although larger PV projects and emerging applications such as floating solar and PV-plus-storage are gaining relevance.

Market Opportunity

The Belgium solar PV market presents opportunities for solar developers, EPC contractors, PV module and inverter manufacturers, installers, energy companies, storage providers and investors as solar generation remains an important component of Belgium’s energy transition.

The market’s high level of distributed PV deployment creates continued opportunities in residential, commercial and industrial rooftop installations, while increasing electricity demand and decarbonisation requirements support additional corporate solar adoption.

The growing need for grid flexibility and energy storage creates an additional opportunity for battery manufacturers, storage developers and solar-plus-storage providers. Battery storage is increasingly used to manage periods of excess solar generation, reduce exposure to low or negative electricity prices and improve grid integration.

For investors and project developers, opportunities increasingly centre on larger commercial and utility-scale projects, hybrid PV-storage systems and self-consumption models. Meanwhile, utilities and grid stakeholders benefit from solutions that improve renewable integration and reduce congestion-related constraints.

Recent Trends and Developments

• Solar PV deployment is increasingly being combined with battery energy storage as developers and consumers seek to manage excess generation, improve self-consumption and reduce exposure to periods of low or negative electricity prices. This trend is particularly relevant as grid flexibility becomes more important.

• Belgium is emerging as one of Europe’s leading markets for utility-scale battery storage. Strong growth in battery deployment is closely linked to increasing grid congestion, renewable integration requirements and opportunities to provide flexibility services.

• Belgium legalised plug-in solar and storage in April 2025, creating a new avenue for small-scale distributed PV deployment. Plug-in systems are gaining attention across Europe as a low-cost way for households and apartment residents to participate in solar generation.

• French energy major TotalEnergies announced in July 2026, the divestment of approximately 170 MW of distributed solar assets, primarily rooftop installations, across France, Belgium, the Netherlands, Spain, Portugal, the United Kingdom, and Luxembourg.

• In April 2026, the Belgian State, ENGIE S.A., and its subsidiary Electrabel signed a Letter of Intent to open exclusive negotiations for the state acquisition of ENGIE's entire nuclear portfolio in Belgium. The planned deal covers all seven nuclear reactors, associated personnel, and long-term liabilities like dismantling obligations.

• The 31 MW floating solar PV plant in Obourg, Belgium- developed jointly by TotalEnergies and Holcim- was officially commissioned and inaugurated on March 20, 2026.

The new report from Blackridge Research on the Belgium Solar Power market provides comprehensive qualitative and quantitative analyses along with deep market insights.

What Do We Cover in the Report?

Solar Power Market Drivers & Restraints 

The study covers all the major underlying market dynamics that help the market develop and grow, as well as the factors that constrain Belgium’s market growth.

The report includes a meticulous analysis of each factor, explaining the relevant qualitative information with supporting data.

Each factor's respective impact in the near, medium, and long term will be covered using Harvey balls for visual communication of qualitative information and will function as a guide for you to analyze the degree of impact.

Solar Power Market Analysis

This report discusses the market overview, the latest updates, critical commercial developments and structural trends, and government policies and regulations. 

Solar Power Market Size and Demand Forecast

The report provides the Belgium Solar Power market size and demand forecast until 2031, including year-on-year (YoY) growth rates and CAGR.

Solar Power Industry Analysis

The report examines the critical elements of the Solar Power supply chain, its structure, and the participants.

 The report uses the PESTEL framework to assess the Solar Power industry's competition and profitability.

Solar Power Market Segmentation & Analysis

The report dissects the Belgium Solar Power market into various segments based on type (Hyperscale Solar Powers, Enterprise Solar Powers, and Other Solar Powers).

A detailed summary of the current scenario, recent developments, and market outlook will be provided for each market segment.

Further, Solar Power market share, size, and demand forecasts will be presented, along with various drivers and barriers for individual market segments.

Effective market segmentation enables you to identify emerging trends and opportunities for long-term growth. Contact us for "bespoke" market segmentation to better align the research report with your requirements.

Key Company Profiles

This report presents detailed profiles of key companies in the Solar Power industry, such as Electrabel SA, Luminus NV, Eneco Belgium NV, EnergyVision NV, Enerdeal SA, Ikaros Solar NV, Soltech NV etc. In general, each company profile includes an overview of the company, relevant products and services, a financial overview, and recent developments.

Competitive Landscape

The report provides a comprehensive list of notable companies in the market, including mergers and acquisitions (M&As), joint ventures (JVs), partnerships, collaborations, and other business agreements related to the Solar Power project.

The study also discusses the strategies adopted by leading Solar Power and AI companies.

Executive Summary

The Executive Summary will be packed with charts, infographics, and forecasts. This chapter summarizes the report's findings crisply and clearly.

The report begins with an executive summary chapter and ends with conclusions and recommendations.