The global solar photovoltaic operations and maintenance (O&M) market reached 348 GW at the end of 2025, expanding by 61 GW year over year, according to Wood Mackenzie’s latest global solar PV O&M analysis released on August 31, 2026. The figures highlight the growing importance of recurring O&M services as solar asset owners focus on availability, performance optimisation, preventive maintenance and lifecycle management.
Market consolidation accelerated during 2025. Wood Mackenzie’s report on global solar PV O&M market reaches 348 GW indicated that the top 15 solar O&M providers managed 200 GW, representing 57 percent of the assessed global market, after adding 41 GW during the year. Based on Wood Mackenzie’s figures, the top 15 captured approximately 67 percent of the 61 GW annual market expansion. The 67 percent figure is a calculated ratio rather than a percentage directly reported by Wood Mackenzie.
Scale is becoming increasingly important as leading providers invest in centralised monitoring, predictive maintenance, spare-parts networks, digital platforms and battery energy storage system (BESS) expertise.
NovaSource Leads Global Solar O&M Market with 38.4 GW
NovaSource Power Services retained the No. 1 position with 38.4 GW under management at the end of 2025. The company has also expanded geographically through acquisitions, including First Solar’s Australian O&M business, which added approximately 500 MW to its portfolio.
RES Energy Global Services, SOLV Energy, Solarig Energy Services and Recurrent Energy remained among the other leading global providers. Sterling & Wilson Renewable Energy ranked sixth, while ENGIE climbed six positions to eighth after more than doubling its O&M fleet.
BayWa r.e. Services and Origis Energy Services entered the global top 15 after adding 2.6 GW and 1.8 GW, respectively, demonstrating that significant movement remains possible despite increasing market concentration.
RES Expands Solar and Battery O&M Infrastructure
RES has previously reported 21.9 GW of solar O&M capacity, making it one of the world’s largest independent renewable-energy service providers.
In May 2026, RES opened a warehouse in Houston to support its U.S. solar and BESS O&M operations, strengthening spare-parts availability and supply-chain resilience. RES has 1,300 U.S. experts and a 1.5 GWp Repsol O&M contract.
Its Denver Operations Control Center was managing more than 3 GW of solar, wind and battery assets across 24 sites in the Americas, with the pipeline expected to reach 4.5 GW by the end of 2026.
RES expands U.S. solar and storage O&M infrastructure by making significant investment showing how logistics, remote operations and regional technical infrastructure are becoming competitive advantages as renewable O&M portfolios expand.
SOLV Energy Tops 20 GW as Storage Drives O&M Growth
SOLV Energy had more than 20 GW of utility-scale solar and storage under O&M contract as of December 31, 2025, representing an increase of more than 2 GW from the previous year.
SOLV Energy manages more than 20 GW of solar and storage projects. Its Darden project in California demonstrates the increasing complexity of renewable O&M. The facility combines 1.6 GW of solar generation with 4.6 GWh of battery storage and represents SOLV Energy’s largest single-site O&M award.
Battery storage substantially expands maintenance requirements beyond PV modules and inverters to battery-management systems, power-conversion equipment, thermal systems and energy-management controls. BESS expertise is therefore becoming an important differentiator for major O&M providers.
Solarig Builds 15 GW O&M and 4.2 GWh BESS Platform
Solarig operates an O&M portfolio exceeding 15 GW, including almost 8 GW in Latin America.
Its BESS O&M portfolio has reached 1.3 GW of nominal power and 4.2 GWh of storage capacity. In March 2026, Solarig certified for Tesla Megapack 2 XL service in Chile.
Solarig’s Global Control Centre monitors more than 220 renewable-energy facilities, representing over 15 GW across more than 10 countries and four continents.
The figures illustrate how centralised digital monitoring is becoming essential for managing geographically dispersed multi-gigawatt renewable portfolios.
Recurrent Energy Manages Nearly 15 GW Under O&M Contracts
Recurrent Energy has nearly 15 GW of solar and energy-storage projects under O&M contracts, including more than 12 GWp of solar and over 3.5 GW of storage across nine countries.
Its development pipeline also creates future O&M opportunities. In August 2026, Recurrent Energy secured $695 million in project financing and tax equity for its 330 MW Cobalt Solar projects in California. Commercial operation is expected by the end of 2027.
Every new utility-scale solar and battery project generates long-term demand for monitoring, preventive maintenance, repairs and performance optimisation, linking renewable investment directly with growth in recurring O&M services.
Sterling & Wilson O&M Portfolio Jumps 53 Percent to 13.5 GW
Sterling & Wilson Renewable Energy recorded approximately 53 percent year-on-year growth in its O&M portfolio, reaching 13.5 GW and securing sixth position globally. It also held 12.2 GW in the Asia Pacific excluding China market.
The company’s FY2026 reporting showed its O&M portfolio increasing from 8.7 GW to 13.5 GW, while order inflows reached approximately ₹10,062 crore.
Sterling & Wilson is deploying AI and machine learning, predictive analytics, drone thermography, robotic cleaning, centralised monitoring and automated testing across O&M operations. Its 790 MWh BESS project in Rajasthan also strengthens its exposure to the fast-growing storage market.
ENGIE O&M Growth Surges 172 Percent in Americas
ENGIE recorded one of the fastest expansions among leading providers. Its global O&M fleet more than doubled during 2025, moving the company up six positions to eighth place, while its Americas O&M portfolio increased 172 percent.
Its future renewable operating base is also expanding. ENGIE is targeting 7 GW of renewable capacity in India by 2030. Its first Indian hybrid solar-plus-storage project combines 200 MW of solar PV with 100 MW / 600 MWh of battery storage.
Meanwhile, megaom, FRV’s standalone O&M business, recorded an even faster 243 percent increase, taking its portfolio to 3.8 GW and entering Wood Mackenzie’s global top 30 for the first time.
North American Solar O&M Costs Drop 18 Percent
Rapid capacity expansion is being accompanied by pricing pressure. Wood Mackenzie reported an 18 percent year-on-year decline in North American full-wrap O&M contract costs.
Falling prices increase pressure on providers to improve productivity through centralised monitoring, predictive maintenance, efficient field deployment and spare-parts optimisation.
The Middle East and Africa are moving in the opposite direction in terms of volume, with regional O&M capacity nearly doubling during 2025. This divergence highlights different market opportunities: mature regions are prioritising cost efficiency, while emerging solar markets are generating growth through rapidly expanding installed capacity.
Solar-Plus-Storage Reshapes Global O&M Market
Battery storage is emerging as one of the most important growth opportunities for solar O&M providers. SOLV Energy’s Darden project includes 4.6 GWh of storage, Solarig manages 4.2 GWh of BESS capacity, Recurrent Energy has more than 3.5 GW of storage under O&M contracts, ENGIE’s Indian hybrid project includes 600 MWh, and Sterling & Wilson is working on a 790 MWh BESS project.
Digitalisation is developing alongside storage. Solarig monitors more than 220 facilities and 15 GW, RES operates a multi-gigawatt control centre, and Sterling & Wilson is deploying AI, machine learning, drones and robotics.
These technologies allow providers to manage larger portfolios while improving fault detection, maintenance planning and asset performance.
Global Solar O&M Consolidation Accelerates
Wood Mackenzie’s figures show a global solar O&M industry becoming larger and increasingly concentrated. The assessed market reached 348 GW, up 61 GW, while the top 15 providers controlled 200 GW or 57 percent and added 41 GW during 2025.
That means the top 15 accounted for approximately 67 percent of annual market growth, based on a calculation using Wood Mackenzie’s reported figures.
NovaSource leads with 38.4 GW, followed by a group of multi-gigawatt providers including RES at 21.9 GW, SOLV Energy at more than 20 GW, Solarig at more than 15 GW, Recurrent Energy at nearly 15 GW and Sterling & Wilson at 13.5 GW.
At the same time, ENGIE’s 172 percent Americas growth, megaom’s 243 percent expansion, and the entry of BayWa r.e. and Origis into the top 15 show that the competitive landscape remains dynamic. The next phase of the global solar O&M market will increasingly be shaped by companies capable of combining multi-gigawatt scale with BESS expertise, AI-driven monitoring, predictive maintenance, robotics, regional spare-parts infrastructure and long-term asset-performance management. As solar-plus-storage deployment accelerates, O&M is evolving from conventional plant maintenance into a technology-intensive renewable asset-management business.
SHAFANA FAZAL
