Renewable Energy Asset Advisory and Software for Battery Energy Storage Systems

Third-party technical advisory for battery energy storage systems (BESS) in the renewable energy sector, spanning due diligence, asset assessment and modeling.
Concept of energy storage system. Renewable energy power plants - photovoltaics, wind turbine farm and battery container. 3d rendering.

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UL Solutions, from launch through operation

UL Solutions serves as your key technical advisor across the asset life cycle — from due diligence and transaction support through operational assessment and later-stage asset decisions such as life extension and repowering. Our workstreams are defined by project phase and asset condition, with scope adjusting as transaction requirements and timelines evolve. 

You also gain access to a broad range of technical disciplines within UL Solutions, providing added context across your projects. 

Grounded in observed asset data and operating history

Evaluate asset performance data, equipment condition and historical operating patterns to get a clear operational view across wind, solar and energy storage systems. 

Clear separation of assumptions and evidence

Analyze and separate model assumptions from observed performance, clearly distinguishing inputs from measured outcomes. 

Built for investment committee review

Assess outputs structured for review under scrutiny, with findings clearly organized to support discussion, challenge and decision-making. 

Measure investment assumptions against asset reality  

UL Solutions applies independent, third-party analysis to evaluate financial models, performance data and commercial contract terms. Our teams examine key assumptions and identify where they may not reflect real operating conditions, including variability across sites, equipment condition and operational profiles. This helps you make informed portfolio and investment decisions. 

Financial modeling

Evaluate capital and operating expenditure (CAPEX and OPEX) assumptions and revenue models under defined scenarios. 

Contracts review

Review engineering, procurement and construction agreements to identify commercial and operational considerations. 

Asset capability

Assess component track record against estimated future performance.

Examine operational performance and asset condition

Our teams conduct periodic evaluations to assess equipment, systems and historical performance data, including key performance indicators and other operational measures to help organizations better understand how assets operate under real conditions and where assumptions may diverge.  

Energy storage 

Review operational energy storage capacity and historical output to assess performance across time horizons  
and portfolio-level impacts.  

System performance analysis

Evaluate supervisory control and data acquisition (SCADA) data to identify performance trends, anomalies and system-level behavior across energy storage assets. 

Lifetime extension and repowering

Assess life extension and repowering options based on asset conditions, performance data and operating assumptions. 

Optimize BESS performance

UL Solutions HOMER® Front Hybrid Optimization software can help you model, manage, and optimize the technical and economic performance of battery energy storage systems, as well as solar, wind and hybrid energy projects. 

System sizing

Determine the most efficient system size in utility-scale systems, single or combined. 

Compare revenue streams for energy markets worldwide

Perform detailed, holistic modeling of most major electricity markets worldwide, including day-ahead, merchant, wholesale, and real-time energy markets down to a 15-minute interval. 

Manage battery augmentation

Model battery lifetime, capacity degradation and augmentation, or replacement strategies to minimize ongoing expenses and maximize revenue. 

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HOMER® Front

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