Global Solar Balance of System Equipment Market Outlook, 2031

The global Solar PV Balance of System (BOS) market is undergoing a transformative expansion, evolving from a peripheral component category into a critical enabler of the worldwide solar energy transition. The BOS encompasses all components of a photovoltaic system other than the solar modules themselves, including mounting structures, inverters, wiring, combiner boxes, monitoring systems, and other electrical and structural elements essential for safe and efficient solar energy generation. The market's fundamental shift is rooted in the increasing complexity of solar installations: as solar plants evolve from passive generation assets into digitally managed, grid-interactive energy resources, the BOS segment is emerging as the "nervous system" of modern solar infrastructure. In the utility-scale segment, major developers and EPCs are increasingly adopting single-axis trackers, bifacial-ready mounting systems, and weather-hardened BOS designs to increase energy yield and withstand extreme conditions. The value chain is characterized by intense vertical integration among Chinese manufacturers, while European and North American producers focus on high-value applications. Entry barriers include certification requirements for electrical components, the capital intensity of manufacturing, and the need for compliance with evolving domestic content rules and grid codes.

Asia-Pacific dominates the global landscape, holding a central position in the PV BOS ecosystem driven by large-scale solar deployments in China, India, Japan, South Korea, Australia, and Southeast Asia, supported by strong manufacturing bases and policy-backed renewable energy targets. The competitive landscape is moderately consolidated, with key players including ABB Ltd., Array Technologies Inc., Huawei Technologies Co. Ltd., Schneider Electric SE, SMA Solar Technology AG, SolarEdge Technologies Inc., and Sungrow Power Supply Co. Ltd. maintaining significant market positions. The market's evolution is propelled by declining solar module prices, which have made BOS components an increasingly significant share of total system costs, alongside government policies and national renewable energy targets. However, the sector faces significant headwinds from grid congestion, interconnection delays, land-use constraints, and trade-related measures.

Market Dynamics

Market Drivers • Declining Solar Module Prices and Rising BOS Cost Share The most powerful driver across the global BOS market is the sustained decline in solar module prices, which has fundamentally shifted the economics of photovoltaic systems. As module costs have fallen dramatically over the past decade, BOS components now account for an increasingly significant share of total system expenditure. BOS components are accounting for an increasing portion of the system cost as the PV module price is falling, making BOS optimization critical to overall project economics. This shift has created structural demand for BOS solutions that can reduce balance-of-system costs through higher-voltage architectures, improved power electronics, and integrated system designs. The transition to 1,500 V DC and 2,000 V DC systems is a direct response to this imperative, reducing BOS costs by lowering the number of components required per watt.
• Global Renewable Energy Targets and Policy Support National renewable energy targets and supportive policies are accelerating BOS deployment globally. China has implemented the Renewable Energy Law since 2006, with the State giving first priority to renewable energy exploration, and after setting the carbon neutrality goal in 2021, the optoelectronic industry has been identified as having great potential. The European Commission's Net-Zero Industry Act, released in 2023, aims to stimulate local manufacturing in Europe and ensure that at least 40% of the EU's clean energy demand can be met by 2030, targeting an installed solar capacity of 600 GW. In the United States, the Inflation Reduction Act includes $369 billion for energy security and climate change investments, stimulating photovoltaic development through tax credits, production subsidies, and loans. Japan's authorities plan to make solar panels mandatory for new residential buildings in Tokyo from 2025 onwards, with photovoltaic power generation estimated to account for 14-16% of Japan's total power generation by 2030.

Market Challenges • High Upfront Costs and Pricing Pressure Despite their long-term benefits, the high upfront costs of solar modules and systems pose a significant challenge to market growth. Pricing pressure on inverters is expected to persist, with per-watt costs declining at 2-4% annually as volume scales and Chinese manufacturers continue to push generic products into the market. This deflationary environment, while beneficial for end-users, creates margin pressure for BOS manufacturers and requires continuous innovation to maintain profitability. The capital intensity of BOS component manufacturing, particularly for inverters and mounting systems, creates barriers for new entrants and requires significant ongoing investment in research and development.
• Grid Congestion and Interconnection Delays Solar PV has become the centrepiece of modern power buildouts, yet the sector navigates challenges such as grid congestion, interconnection delays, land-use constraints, and trade-related measures. These infrastructure bottlenecks are particularly acute in regions with rapid solar deployment, where transmission capacity has not kept pace with generation capacity additions. Interconnection delays can extend project timelines by years, creating uncertainty for developers and delaying BOS procurement decisions. In Europe, inconsistent policies and regulations hinder full-scale commercialization, while in emerging markets, supply chains remain import-dependent for BOS components.



Market Trends • Hybrid Inverters and Integrated Home Energy Systems The convergence of solar generation, storage integration, intelligent controls, and digital energy management is gaining significant commercial traction globally. A notable industry trend in the inverter space is the growing overlap between inverter and storage manufacturers, with many top brands now offering integrated solar-plus-storage platforms that blur the line between power conversion suppliers and battery solution providers. The most dynamic development in this segment is the increased emphasis on hybrid inverters and fully integrated home energy systems, with microinverters also featuring prominently for small-scale and balcony systems. This trend reflects the broader shift toward distributed energy resources that can operate as flexible, grid-supportive assets.
• Advanced Tracking Systems and Weather-Hardened BOS Designs The market is witnessing continuous innovation in mounting and tracking systems optimized for higher energy yield and resilience. Utility-scale projects are increasingly adopting single-axis trackers, bifacial-ready mounting systems, and weather-hardened BOS designs to increase energy yield and withstand extreme heat, high wind, corrosion, snow load, and dust exposure. The growing adoption of single-axis trackers over fixed-tilt systems reflects the industry's focus on maximizing energy yield per unit of land and capital invested. These tracking systems, combined with smart inverters and advanced monitoring platforms, are enabling solar plants to operate more efficiently and respond dynamically to grid conditions.

Segmentation Analysis

Mounting and tracking systems represent the largest BOS segment by physical volume and are critical to overall system cost and performance,
• Mounting structures (fixed-tilt ground, tracker, roof hooks, and ballasts) account for 25–30% of BOS costs in Spain, while heavy-gauge galvanized steel mounting for ground-mount plants currently costs €0.025-€0.04 per watt.
• In Switzerland, mounting systems represent the single largest BOS category by value. The global utility-scale solar BOS market includes mounting and tracking systems as a major component category, with key players including Array Technologies Inc., Nextracker, GameChange Solar, FTC Solar, and OMCO Solar.
• Nextracker announced a strategic framework agreement in October 2025 to use its patented steel module frame technology for T1 Energy's new 5-GW solar manufacturing facility, accelerating the industry's transition away from imported aluminum frames toward made-in-the-USA frames using locally manufactured specialty steel.
• Array Technologies announced the successful completion of its acquisition of APA Solar in August 2025, strengthening its position as a global leader in renewable energy infrastructure and expanding its product portfolio.
• The increasing adoption of single-axis trackers over fixed-tilt systems is driving higher energy yield per unit of land, particularly in utility-scale applications where land costs and permitting constraints are significant considerations.
• Building-integrated photovoltaic (BIPV) mounting and electrical systems represent a high-value niche, with specialized BIPV BOS solutions commanding prices 20–40% above standard systems and being less exposed to commodity competition.

On-grid systems dominate the global BOS market because the overwhelming majority of solar PV installations worldwide are connected to national electricity grids, benefiting from established transmission infrastructure and power purchase agreements
• The on-grid segment exhibits clear dominance globally, reflecting the utility-scale orientation of the solar market, where economies of scale and access to established electricity markets are critical to project viability.
• Utility-scale solar farms represent the largest end-use segment for BOS components, accounting for approximately 55% of total market value, with these installations typically exceeding 10 MW.
• The commercial and industrial rooftop segment accounts for about 25% of BOS market value, with demand driven by businesses seeking to reduce energy costs and meet sustainability targets.
• Off-grid systems serve niche applications including remote communities, telecommunications infrastructure, and agricultural operations where grid connection is impractical or uneconomical, representing a small but growing segment.
• Hybrid systems, which combine solar PV with battery storage and/or other generation sources, are the fastest-growing system configuration segment, driven by the increasing integration of energy storage with solar installations.
• In Germany, the EU Net-Zero Industry Act's targets for domestic solar manufacturing (30% of EU demand by 2030) could stimulate local inverter and BOS component production, creating opportunities for European manufacturers.
• North America is characterized by strong grid interconnection requirements, rapid growth of utility-scale and distributed solar, and increasing solar-plus-storage integration, with BOS procurement influenced by electrical code compliance, rapid shutdown rules, domestic content considerations, and wildfire resilience.

Utility-scale applications dominate the global BOS market because large-scale solar farms require the most extensive and sophisticated balance-of-system infrastructure, including high-capacity inverters, extensive mounting and tracking systems, and grid interconnection facilities
• Utility-scale solar farms represent the largest end-use segment for BOS components, accounting for approximately 55% of total market value.
• The utility-scale segment will continue to dominate the market, but distributed generation (commercial and residential) will see faster growth in emerging markets, creating opportunities for BOS suppliers across all segments.
• Large-scale solar projects under Saudi Arabia's Vision 2030 and national renewable energy targets are driving demand for BOS components in the Middle East, with the region offering high growth potential due to abundant solar resources and low-cost project development.
• The commercial and industrial segment is expected to maintain its dominant share at 50–60% of total BoS procurement in some markets, while the utility-scale and ground-mount segments are forecast to grow from 20–30% to 30–40% of the market.
• In emerging markets, the residential and C&I segments will become more significant BOS consumers as grid bottlenecks make small-scale, self-consumption projects attractive alternatives to utility-scale development.
• The adoption of advanced power-electronics features such as voltage-ride-through and grid-forming capability is particularly important for utility-scale applications, where grid stability and reliability are critical requirements.
• Utility-scale projects are increasingly adopting single-axis trackers, bifacial-ready mounting systems, and weather-hardened BOS designs to increase energy yield and withstand extreme heat, high wind, corrosion, snow load, and dust exposure.

Regional Analysis

Asia-Pacific is the largest region globally because China, India, Japan, and South Korea collectively drive the majority of global solar PV deployment through aggressive renewable energy targets, large-scale manufacturing bases, and supportive government policies
• Asia-Pacific remains at the center of the PV BOS ecosystem, driven by large-scale solar deployments in China, India, Japan, South Korea, Australia, and Southeast Asia, supported by strong manufacturing bases and policy-backed renewable energy targets.
• China's dominance is reinforced by its integrated manufacturing capacity, with Huawei and Sungrow jointly controlling 55% of the global inverter market, reflecting the concentration of BOS manufacturing capacity in the region.
• Enabling schemes like PM-KUSUM, PM Surya Ghar Yojana, the grid-connected rooftop solar programme, and the Delhi Solar Energy Policy are helping to democratize solar adoption across rural and urban areas, bringing new opportunities for innovation, manufacturing, and investment in the BoS space.
• Japan's authorities plan to make solar panels mandatory for new residential buildings in Tokyo from 2025 onwards, with photovoltaic power generation estimated to account for 14-16% of Japan's total power generation by 2030 and cumulative installed capacity of approximately 117.56 GW.
• Chinese manufacturers are focusing on vertically integrated plants and scaling glass-melting and coating lines to reduce costs and maintain the region's competitive advantage in global export markets.
• The region's BOS demand is primarily from utility-scale solar plants, but distributed generation is expected to grow rapidly as grid bottlenecks make self-consumption projects increasingly attractive.

Key development

• November 2025: First Solar inaugurated its new fully vertically integrated manufacturing facility in Iberia Parish, Louisiana. The $1.1 billion facility spans approximately 2.4 million square feet and began production in July 2025, several months ahead of schedule. The accelerated timeline was driven by the passage of the One Big Beautiful Bill Act and the Trump administration's trade policies, both of which catalyzed demand for American-made solar technology.
• October 2025: Nextracker announced a strategic framework agreement to use Nextracker's patented steel module frame technology for T1 Energy's new 5-GW G1_Dallas solar manufacturing facility. The agreement is expected to accelerate the industry's transition away from imported aluminum frames toward made-in-the-USA frames using locally manufactured specialty steel.
• August 2025: Array Technologies announced the successful completion of its acquisition of APA Solar, a premier solar racking and structural solutions provider. This strategic acquisition strengthens ARRAY's position as a global leader in renewable energy infrastructure and expands its product portfolio to better serve the evolving needs of the solar industry.
• May 2025: 1Lattice released its report "Solar Unplugged: A Deep Dive into Balance of System Dynamics," projecting India's solar BoS market to grow from USD 3 billion in 2024 to around USD 7 billion by 2029, registering a CAGR of 16%. The report highlighted enabling schemes like PM-KUSUM, PM Surya Ghar Yojana, and the Delhi Solar Energy Policy as key growth drivers.

Considered in this report
Historic Year: 2020
Base year: 2025
Estimated year: 2026
Forecast year: 2031

Aspects covered in this report
Solar PV Balance of System Market with its value and forecast along with its segments
Various drivers and challenges
On-going trends and developments
Top profiled companies
Strategic recommendation

By Component
• Mounting Systems
• Inverters
• DC Cables & Connectors
• Monitoring & Control Systems
• Combiner Boxes
• Junction Boxes
• Other Components

By System Type
• Grid Connected
• Off Grid
• Hybrid

By Application
• Residential
• Commercial & Industrial
• Utility