Battery Energy Storage
Battery Storage Where
the Economics
Justify It.
We analyse your load profile, then decide if BESS makes economic sense.
Load profile first. Battery second.
The Commercial Case
Why a Commercial or Industrial Facility Considers BESS
For most commercial and industrial customers, electricity cost is driven not only by how much energy is used but by when it is used and how high demand peaks. A battery can change that profile: charging when power is cheaper or demand is low, and discharging when demand or price is high.
Whether that is worthwhile depends entirely on the facility. The shape of the load, the tariff, the size of demand-related charges and the availability of on-site solar decide whether a battery pays for itself — which is why Agile evaluates the economics before recommending a system.
- Reduce the demand peaks that drive demand-related charges
- Shift consumption away from higher-cost periods
- Use more of the facility's own solar generation
Applications
Where Energy Storage Can Create Value
Most facilities that benefit from BESS do so through one or two of these applications, not all of them.
Is BESS Right for You?
BESS Is Considered Where the Load Profile and Economics Justify It
Battery storage is not something every customer needs. Agile recommends BESS only where the facility's load profile, tariff and operating pattern show that the savings will justify the investment over the life of the system.
A facility with a flat, steady load and modest demand-related charges may see little benefit from storage, and money is often better spent first on reducing consumption at the equipment. A facility with short, sharp demand peaks, a significant price difference between periods or surplus solar generation is a stronger candidate.
Our assessment is designed to reach a clear answer either way — including a recommendation not to proceed when the numbers do not support it.
Signs BESS May Make Sense
- Short, pronounced demand peaks rather than a flat load
- Demand-related charges form a significant share of the bill
- A meaningful cost difference between tariff periods
- Surplus on-site solar generation, existing or planned
- A defined need for backup of critical loads
- Suitable space, access and electrical connection for the system
How Agile Evaluates
From Load Profile to Investment Decision
Agile analyses your load profile, demand pattern and electricity consumption, then determines whether BESS makes economic sense for the facility.
01
Collect Data
Gather electricity bills, tariff details and interval meter data — or install monitoring to capture it.
02
Analyse the Load Profile
Map consumption, demand peaks, their timing and how often they occur across the year.
03
Size the System
Model battery power and energy capacity against the peaks and periods the facility needs to cover.
04
Assess the Financial Case
Compare lifetime savings with capital, operating and replacement costs to test the return.
05
Recommend
Advise whether to proceed, phase the investment or not proceed — with the reasoning behind it.
System Sizing
How a BESS Is Sized
A battery that is too small misses the peaks; one that is too large never earns back its cost. Sizing balances the two.
| Sizing factor | What we look at | Why it matters |
|---|---|---|
| Power rating (kW) | The height of the demand peaks to be reduced | Sets how much load the battery can offset at any moment |
| Energy capacity (kWh) | How long peaks or high-cost periods last | Sets how long the battery can sustain that output |
| Load profile | Interval data across weekdays, weekends and seasons | Shows whether peaks are frequent and predictable enough to target |
| Tariff structure | Demand-related charges and time-of-use pricing | Determines where the financial value actually comes from |
| Solar generation | Existing or planned PV output against site load | Identifies surplus energy the battery could store |
| Battery life | Usable depth of discharge, cycling and degradation | Keeps the design performing over the life of the system |
| Site constraints | Space, ventilation, access and electrical connection | Confirms the system can be installed safely and practically |
Sizing is carried out for each facility. We do not recommend standard product sizes.
Return on Investment
How the Financial Case Is Assessed
The financial case weighs every source of value the battery can realistically capture against the full cost of owning it, over the expected life of the system. Payback and return are calculated from the facility's own data, not from a typical figure.
Because BESS economics depend so heavily on tariff, load profile and system cost, we do not quote a typical payback period for battery storage. The assessment produces a facility-specific result, stated with the assumptions behind it.
Where monitoring is not yet in place, installing it first can provide the interval data needed to build a reliable financial case.
What the Assessment Weighs
- Value: reduced demand-related charges
- Value: lower energy cost from load shifting
- Value: greater use of on-site solar generation
- Cost: equipment, installation and integration
- Cost: operation, maintenance and monitoring
- Cost: battery degradation and eventual replacement
- Result: payback period and lifetime return
- Result: sensitivity to tariff and load changes
Typical Candidates
Facilities Where BESS Is Often Evaluated
These facility types frequently have the load characteristics worth assessing — though the answer still depends on the individual site.
Common Questions
Battery Storage Explained
No. BESS is considered where the load profile and economics justify it. A facility with a flat load and low demand-related charges may gain little, and reducing consumption at the equipment is often the better first investment. Agile's assessment is designed to tell you honestly whether storage makes sense.
We analyse the facility's electricity bills, tariff and interval consumption data to understand its load profile and demand pattern. We then size a system against those peaks, model the savings it could capture, and compare them with the full cost of owning the system before making a recommendation.
The battery charges when demand is low, then discharges during high-demand periods so less power is drawn from the grid at the moments that set demand-related charges. How much this saves depends on how the tariff charges for demand and how predictable the peaks are.
The power rating is set by the height of the peaks to be reduced, and the energy capacity by how long those peaks or high-cost periods last. Solar generation, battery life, depth of discharge and site constraints are also factored in, so the system is sized to the facility rather than to a standard product.
It depends on the facility. BESS payback is driven by tariff structure, load profile, system cost and the value streams available, so we do not quote a typical figure. The feasibility assessment produces a facility-specific payback and return, together with the assumptions used.
Yes. Storing surplus solar generation for later use is a common application, particularly where daytime generation exceeds on-site demand. The value depends on how much surplus is available and when the facility needs the energy.
It can, but only where the system has been specifically designed and configured for backup operation. Demand reduction and backup are different design requirements, so the intended application must be established during assessment.
Find Out Whether BESS Makes Sense for Your Facility.
Share your electricity bills and operating pattern. We will analyse your load profile and tell you whether battery storage is worth pursuing.