SCADA, BESS, Asset monitoring
What can you monitor with SCADA in a Battery Energy Storage System?
Educational content
September 17, 2026
8 min read
Monitoring a BESS (Battery Energy Storage System) is often reduced to a few familiar metrics, such as State of Charge (SoC), State of Health (SoH), and chargeable power. In reality, that’s only a small part of the picture. A battery can have stored energy and still be unavailable due to equipment faults, protection events, communication issues, or a cell imbalance that reduces its usable capacity.
As battery storage projects become larger and more complex, operators need more than access to data – they need clear operational visibility.
In this educational piece, we explore what SCADA actually monitors, why that information matters, and how it helps operators keep battery energy storage systems safe, available, and performing as expected.
Key takeaways:
- A BESS requires more than battery monitoring – it requires operational visibility.
- SCADA brings the most important operational data into one place.
- Real-time visibility, coupled with notifications, helps operators improve reliability, availability, and performance.
- Portfolio SCADA makes it easier to manage growing renewable energy assets.
Why is monitoring a BESS more complex than it looks?
Monitoring a BESS isn’t difficult because there’s too little data. It’s difficult because there’s too much.
Every second, a modern BESS generates thousands of operational data points. Battery temperatures, voltages, power flows, equipment status, alarms, and grid measurements all contribute to understanding the asset’s performance. The challenge is knowing which information matters, when it matters, and how different pieces of information fit together.
Effective BESS operation depends on understanding the complete operational picture rather than individual measurements in isolation. Operators need visibility into four key areas:
- Battery health
- Asset availability
- Plant and grid performance
- Alarms with real-time notifications
Knowing what is happening is only part of the challenge. Operators also need to understand what requires attention, what can wait, and what actions to take. That’s where SCADA turns operational data into meaningful insights.
What do operators need to monitor in a BESS?
Beyond providing a real-time view of the plant, SCADA helps operators identify trends, compare performance over time, and spot abnormal conditions that may indicate developing issues. For example, a gradual increase in battery temperature over days or weeks, or a temperature reading that differs significantly from neighboring cells or racks, can signal that further investigation is needed before performance or availability is affected.
While the exact information depends on the project and equipment, most operators rely on SCADA to monitor three key areas. Learn more about SCADA and how it works in our knowledge piece on What is SCADA?
1. Is the battery healthy?
A battery’s condition changes continuously throughout its lifetime. Monitoring battery health helps operators identify abnormal conditions early, protect the asset, and support long-term performance.
Typical indicators include:
- State of Charge (SoC)
- State of Health (SoH)
- Battery temperature
- Charge and discharge rates
- Battery balance
Each of these indicators provides a different perspective on battery health. State of Health reflects how the battery is aging, temperature helps identify abnormal operating conditions, and battery balance shows how evenly energy is distributed across cells or racks. State of Charge, however, is often the most familiar metric and one of the easiest to misinterpret.
Although SoC tells operators how much energy is stored, it doesn’t tell the whole story. Multiple batteries may report, for e.g., 66% SoC, yet one can deliver significantly better performance than the other. That’s because SoC is an average value – it doesn’t reveal whether individual cells or battery racks are balanced.
As the illustration shows, balanced and unbalanced batteries can have the same State of Charge (SoC), yet only the balanced battery distributes energy evenly across its cells and can efficiently use its available capacity.
Balanced vs. Unbalanced battery
When individual cells or racks operate at different charge levels, the battery becomes unbalanced. During charging and discharging, the weakest cells reach their operating limits first, forcing the Battery Management System (BMS) to reduce performance in order to protect the battery.
As a result, the battery may have stored energy that cannot be fully used.
For operators, this means that monitoring battery health goes beyond tracking State of Charge alone. By bringing together battery balance, available capacity, temperatures, charge and discharge rates, and other health indicators in a single operational view, SCADA helps operators understand the battery’s overall condition and identify developing issues before they affect performance or availability.
2. Is the BESS available?
BESS may contain stored energy yet be unable to respond due to maintenance activities, protection limits, communication failures, or equipment faults.
SCADA helps operators verify whether the asset is available by monitoring:
- Asset readiness
- Battery rack status
- Converter status
- Communication status
- Protection systems
- Availability status
These indicators help answer a seemingly simple question: Is the BESS available? In practice, however, the answer depends on what you’re trying to understand.
In real-time operation, availability is viewed as a binary status. The asset is either available or unavailable to perform its intended function.
Over time, however, availability becomes much more than a yes-or-no indicator. Historical availability helps operators evaluate how reliably the BESS has performed, identify recurring downtime, and understand where operational improvements may be needed.
Because different stakeholders use this information for different purposes, availability is often viewed from three perspectives:
- Operational availability – Is the BESS available to charge, discharge, and participate in energy markets or grid services?
- Technical availability – Are the battery, converters, communication systems, and other critical components functioning correctly? This information helps identify equipment issues and supports discussions with the OEM.
- Contractual availability – Has the asset met the availability targets defined in service agreements or performance guarantees with the manufacturer or service provider?
By bringing together asset readiness, equipment status, communication health, and protection system information, SCADA helps operators determine not only whether the BESS is available at any given moment, but also how reliably it has performed over time. This gives operators the operational insight needed to identify recurring downtime, improve asset reliability, and verify contractual performance.
Historical availability compared with a contractual availability target
Historical availability helps operators identify recurring downtime, evaluate the long-term reliability of the BESS, and compare actual plant availability against contractual performance guarantees. If availability begins to fall below the expected level, operators can investigate the underlying causes and take corrective action before reliability or commercial performance is affected.
By combining real-time operational measurements with historical availability trends, SCADA provides a more complete view of plant performance, helping operators understand not only whether the BESS is performing as expected today, but also whether it has been performing reliably over time.
3. Does anything require immediate attention?
Not every issue starts with an alarm.
Some operational problems require immediate action, while others begin as small deviations that develop gradually over time. Identifying those early warning signs is just as important as responding to faults once they occur.
SCADA provides real-time notifications, alarms, and event logs that alert operators to abnormal conditions, including:
- High-temperature warnings
- Communication failures
- Converter trips
- Protection events
- Battery faults
- Emerging issues identified through abnormal trends or operating anomalies
However, effective monitoring goes beyond responding to alarms. By continuously analyzing operational data, historical trends, and deviations from expected operating conditions, SCADA can also help operators identify rising issues before they become critical.
For example, a gradual increase in battery temperature, repeated alarms from the same equipment, or an individual battery rack behaving differently from the rest of the system may indicate an emerging fault that warrants investigation.
By combining real-time notifications with historical trends and event records, operators can investigate the root cause of issues, assess their impact, and respond before small deviations affect performance, availability, or asset reliability.
Ultimately, the goal isn’t simply to detect faults – it’s to recognize potential problems early enough to take informed action. Whether responding to an alarm, investigating an emerging issue, or managing an entire portfolio of battery assets, SCADA provides the operational awareness needed to support faster, more confident decision-making.
How do operators turn BESS operational insights into actions?
Monitoring a BESS isn’t the end goal – operating it effectively is.
By bringing together information about battery health, asset availability, plant performance, and developing issues, SCADA gives operators the context they need to make informed operational decisions throughout the day.
Those decisions may include:
- Verifying that dispatch instructions have been executed correctly
- Confirming the BESS is operating within its planned cycling strategy
- Investigating alarms or abnormal operating conditions
- Determining whether maintenance is required
- Confirming the asset is available for upcoming dispatch or market participation
Rather than reacting to isolated events, operators can use this information to understand what is happening, assess its impact, and determine the most appropriate response.
As battery storage portfolios grow, these decisions become increasingly complex. Operators are often responsible for multiple battery, wind, and solar assets across different sites, each generating its own operational data. Portfolio-level SCADA brings this information into a single operational view, making it easier to compare asset performance, coordinate operations, and maintain situational awareness across the fleet.
Ultimately, SCADA doesn’t replace operator expertise – it provides the operational context needed to make faster, more informed decisions that improve asset availability, support battery lifetime, and keep renewable energy assets operating reliably.
Monitoring is only one part of the BESS equation.
Our BESS checklist helps you review the wider considerations — from grid connection and system integration to monitoring, control, compliance, and trading.
The bottom line
Modern Battery Energy Storage Systems generate an enormous amount of operational data, but data alone does not improve performance.
The real value comes from understanding which information matters and having the visibility to act on it. By bringing together battery health, asset availability, plant performance, and real-time notifications into a single operational environment, SCADA helps operators make informed decisions, respond more quickly to issues, and keep assets operating safely and reliably.
As battery storage continues to expand alongside wind and solar generation, operational complexity will only increase. Managing multiple technologies, vendors, and sites requires more than access to data. It requires a clear, consistent view of the entire portfolio.
This is where portfolio SCADA solutions, such as Opoura’s OneView® Portfolio SCADA, help operators monitor, control, and manage renewable energy assets from a single interface, turning operational data into actionable insight across the entire fleet.
