The Importance of an ITA in Projects Involving Battery Storage (BESS)

Reading Time: ~15 minutes
Key Takeaway: Battery storage projects carry unique technical and financial risks, and an Independent Technical Advisor (ITA) plays a critical role in validating assumptions, protecting returns, and building lender and investor confidence.

Introduction 

Battery Energy Storage Systems (BESS) are moving fast—from pilot projects to utility-scale investments. On paper, the numbers look attractive: flexible revenue streams, grid support, and strong growth projections. But many BESS projects struggle once reality sets in. Performance falls short, degradation happens faster than expected, and revenue assumptions don’t hold up.

The problem isn’t that battery storage doesn’t work. The problem is that BESS projects are often financed using assumptions that are not independently tested. Technical risks are complex, fast-evolving, and easy to underestimate—especially for financiers focused on spreadsheets rather than system behavior.

That’s why The Importance of an ITA in Projects Involving Battery Storage (BESS) is growing globally. An ITA provides independent technical insight, helping investors and lenders understand what the battery system can realistically deliver—not just what the model promises.

📦 Summary Box

What this article covers:

• Why BESS projects carry unique technical risks

• How ITAs evaluate battery performance and degradation

• The role of ITAs in protecting financial models

• Why lenders increasingly expect ITA involvement in BESS

• How ITAs support BESS projects across their lifecycle

The Importance of an ITA in Projects Involving Battery Storage (BESS)

Battery storage projects sit at the intersection of power electronics, software, chemistry, and grid operations. This makes them very different from traditional renewable energy assets.

The Importance of an ITA in Projects Involving Battery Storage (BESS) starts with one key fact: most financial risks in BESS projects are driven by technical uncertainty.

An ITA helps translate that uncertainty into something decision-makers can understand and manage.

Why BESS Projects Are Harder to Evaluate

Unlike solar or wind, BESS revenue depends heavily on how the system is used—not just installed.

Common challenges include:

• Uncertain degradation behavior

• Complex control algorithms

• Multiple revenue streams

• Rapid technology change

• Limited long-term operating data

Without independent review, these risks often go unnoticed until performance drops.

What an ITA Does in a BESS Project

An ITA is engaged to independently assess the technical aspects of a BESS project and explain how they affect financial performance.

In BESS projects, an ITA typically:

• Reviews battery technology selection

• Assesses degradation assumptions

• Evaluates system sizing and configuration

• Reviews control strategies and EMS

• Identifies safety and compliance risks

• Translates findings into financial impact

This role is central to The Importance of an ITA in Projects Involving Battery Storage (BESS).

Battery Degradation: The Core Financial Risk

Battery degradation is one of the biggest threats to long-term returns.

Most financial models assume:

• Predictable degradation curves

• Stable performance over time

Reality is more complex.

An ITA evaluates:

• Chemistry-specific degradation behavior

• Impact of cycling frequency

• Effect of temperature and operating limits

• Warranty alignment with model assumptions

Even small deviations can materially reduce revenue.

Revenue Assumptions and Dispatch Strategy

BESS revenue depends on how the battery is charged and discharged.

Key questions an ITA reviews:

• Is the dispatch strategy realistic?

• Are cycling assumptions achievable?

• Does the EMS support the revenue model?

• Are grid constraints fully understood?

The Importance of an ITA in Projects Involving Battery Storage (BESS) is especially clear when optimistic dispatch assumptions inflate returns.

Safety and Compliance Risks

Battery systems carry fire and thermal runaway risks that financiers cannot ignore.

An ITA reviews:

• Battery safety design

• Fire suppression systems

• Compliance with codes and standards

• Emergency response planning

Safety failures don’t just cause downtime—they create reputational and regulatory risk.

Technology Selection and Vendor Risk

Not all batteries are equal, even within the same chemistry.

An ITA assesses:

• Manufacturer track record

• Supply chain resilience

• Warranty strength and exclusions

• Long-term service support

This protects projects from relying on unproven or unstable vendors.

EPC and Integration Risk

BESS projects often involve multiple contractors and systems.

An ITA reviews:

• EPC scope clarity

• Interface risk between systems

• Construction schedule realism

• Commissioning procedures

Poor integration is a common cause of delays and cost overruns.

O&M Strategy and Long-Term Performance

Battery projects require active operational management.

An ITA evaluates:

• O&M scope and responsibilities

• Spare parts strategy

• Software update risks

• Performance monitoring systems

This ensures long-term availability assumptions are realistic.

Why Lenders Rely on ITAs for BESS Projects

Banks are cautious with BESS because the technology evolves faster than loan tenors.

Lenders use ITAs to:

• Understand downside risk

• Validate base-case assumptions

• Support credit approvals

• Define reserve requirements

The Importance of an ITA in Projects Involving Battery Storage (BESS) is evident in financing terms shaped by ITA findings.

How ITAs Protect Investors

Equity investors focus on upside—but must manage downside.

An ITA helps investors:

• Identify hidden technical risks

• Test revenue durability

• Prepare for refinancing or exit

• Avoid overpaying for assets

Independent advice improves long-term value.

ITA Involvement Across the Project Lifecycle

Development Stage

• Technology and site suitability

• Early risk identification

Financial Close

• Technical due diligence

• Lender confidence

Construction

• Progress monitoring

• Quality assurance

Operations

• Performance benchmarking

• Root-cause analysis

This lifecycle role reinforces The Importance of an ITA in Projects Involving Battery Storage (BESS).

Common Mistakes in BESS Projects Without an ITA

Projects without independent technical review often face:

• Overestimated revenue

• Faster-than-expected degradation

• Warranty disputes

• Refinancing challenges

These issues are expensive to fix later.

Why ITA Demand in BESS Is Growing

Several trends are driving ITA demand:

• Larger BESS project sizes

• Merchant revenue exposure

• Increased lender scrutiny

• ESG and safety concerns

Independent technical validation is becoming standard practice.

The Future Role of ITAs in Battery Storage

As BESS markets mature, ITAs will:

• Support hybrid projects (solar + storage)

• Validate digital optimization tools

• Assess second-life battery risks

• Support portfolio-level financing

Their role will expand alongside market complexity.

Final Thoughts & Call to Action

Battery storage projects offer enormous potential—but they also carry risks that traditional financial models struggle to capture. Performance, degradation, safety, and control strategies all directly affect revenue and returns.

The Importance of an ITA in Projects Involving Battery Storage (BESS) lies in turning technical uncertainty into informed financial decisions. Independent technical advice helps lenders, investors, and developers move forward with clarity, confidence, and credibility.

If you are developing, financing, or investing in a BESS project and want to validate assumptions before capital is committed, speak to an experienced Independent Technical Advisor.

📞 WhatsApp or call 013-300 6284 to discuss how ITA support can strengthen your battery storage project.