Introduction: What Is Digital Commissioning?

Commissioning a Battery Energy Storage System (BESS) is a critical step before commercial operation begins. It ensures the system performs as expected and identifies underperformance issues early, before they impact operations or delay commercial operation dates (COD).

TWAICE Digital Commissioning adds significant value to your commissioning phase, since BESS systems contain hundreds of thousands of components that cannot be checked manually.

During TWAICE’s Digital Commissioning process, cycling tests are run on the BESS and the results are analyzed by TWAICE engineers.
Through this process,TWAICE provides an independent, third-party validation of your supplier’s safety and performance claims — giving you a data-driven baseline of your system’s initial performance and confidence before entering commercial operation.

Digital Commissioning helps you:

Avoid COD delays caused by on-site underperformance
Detect weak cells or modules early and coordinate replacements
Establish a performance benchmark for future degradation tracking and fleet comparison

📊 What You Receive

TWAICE’s Digital Commissioning deliverables consist of two primary components:

Executive Summary Report (PDF)
Provides a clear and concise overview of key findings, system performance, detected issues, and recommended actions before COD – an assessment that cross-references multiple KPIs (see below).
Detailed & Interactive Digital Report (via the TWAICE Platform)
In-depth analysis with interactive dashboards that visualize the following KPIs:

Energy capacity
DC-DC round-trip efficiency (RTE)
DC resistance (DCR)
Temperature spreads
Voltage spreads
Anomalies or inconsistencies in module or string behavior

In addition to these two formal deliverables, TWAICE engineers will walk through the results with your team during a scheduled call.

TWAICE platform with interactive dashboards

Sample executive summary report

👉🏻The sample executive report and demo of the platform can be shared upon request, please reach out to us!

⏱️ Timeline: Ready in 10 working days

In most instances, engagement with TWAICE occurs as the site is being commissioned. TWAICE acts as an independent third party, providing external recommendations and guidance on commissioning best practices.

Typically, the full Digital Commissioning process spans 1-2 months and is influenced by the date(s) that the test profiles are run on the BESS, the timeline for data connection, and the timeline for system onboarding onto the TWAICE platform.

Once the system is onboarded and TWAICE receives data from the tests, the Digital Commissioning analysis and Executive Summary are delivered within 10 working days.

🔎 Process: Step by step

1. BESS onboarding

This step is typically completed during onboarding of the TWAICE BESS Analytics platform.
TWAICE and the customer jointly define and prepare the system configuration:

Establish the BESS hierarchy (e.g. number and configuration of PCS, strings, modules, cells)
Verify key system metadata such as nominal capacity, cell chemistry, etc.

2. Data connection set up

This step is central to the process.

TWAICE sets up a secure data connection to your BESS, historian, or datalake:

Enables real-time or batch data transmission to the TWAICE Platform
Includes a data quality and completeness check before test execution
Guarantees that the analysis is based on accurate, high-resolution information

📘 Check out our help articles to learn more about our Data Ingestion Methods.

3. Configure & execute test profiles

Next, the relevant parties perform the tests on your system.

TWAICE provides recommended load profiles and “best practice” guidelines to ensure the tests produce accurate and comparable results across systems and sites.

These tests typically include:

Capacity test: a full charge–discharge cycle
DC Resistance (DCR) test: pulse sequences at approx. 50% SoC

📘 For detailed instructions, setup parameters, and environmental recommendations, see our dedicated article on Digital Commissioning Test Profiles.

🟡 Important Notes:

During the commissioning, TWAICE advises that a continuous data connection to the storage is maintained while the test profiles are performed. If this is not possible the data can be stored locally and shared with TWAICE via batch transfer.
TWAICE can also analyze historical test data upon request; however, results may be limited if test profiles do not meet TWAICE’s analysis criteria (e.g., symmetric charge / discharge currents, sufficient rest periods before current is applied, etc.). For more information, please contact TWAICE Customer Success at support@twaice.com.

4. Analysis

Once the data has been collected, TWAICE engineers perform an in-depth evaluation of the test:

Analyze the dataset to evaluate energy capacity, efficiency, and resistance values
Detect anomalies, inconsistencies, or underperforming components
Create and display aggregated visualizations on the TWAICE platform
Where possible, benchmark the results against comparable systems to establish an operational baseline