Commercial Battery Storage Feasibility Study

A commercial battery storage feasibility study should begin with the site’s operational problem and commercial objective—not with a preferred battery size. Storage can reduce peaks, shift consumption, support on-site generation and provide flexibility, but its value depends on the load profile, network constraints, control strategy and realistic treatment of degradation.

Executive Summary

Battery energy storage is highly configurable. That flexibility is valuable, but it also makes weak business cases easy to construct. A model can appear attractive when it combines incompatible revenues, assumes perfect dispatch or ignores replacement and augmentation.

Altair assesses battery projects independently of equipment supply. We examine the opportunity through four connected lenses: technical, financial, operational and strategic. The result is a defensible basis for investment, procurement and financing.

The Central Question

Which battery use cases create robust value at this site, and what combination of power, usable energy capacity and controls is justified? The answer may be a different configuration from the one originally proposed—or a decision not to install storage yet.

Commercial Battery Storage Feasibility Study Framework

1. Define the use cases

Each use case creates different requirements. Peak shaving depends on short, predictable demand events. Solar self-consumption depends on the timing and volume of surplus generation. Backup power requires a defined reserve and suitable electrical architecture. Market participation depends on qualification rules, dispatch obligations and route-to-market terms.

These services should be prioritised before the battery is sized. Revenue stacking is only credible when the same capacity can physically and contractually perform the proposed services at the relevant times.

2. Model the site at interval level

Annual consumption is not a sizing metric. We use half-hourly or finer data to reconstruct demand, generation, imports, exports and network constraints. The model should capture seasonal conditions, exceptional peaks, planned operating changes and the control hierarchy between the battery and other assets.

For sites with CHP, the storage model must reflect how generation and heat-led operation interact. Our CHP feasibility study framework explains the wider decision context.

3. Test the technical configuration

Power and energy capacity solve different problems. The assessment must distinguish PCS rating from usable battery capacity and confirm the required duration, efficiency, state-of-charge limits and cycling profile. Compatibility between the cells, BMS, PCS, EMS, protection and communications systems is fundamental.

Location, ventilation, fire strategy, access, acoustic limits, warranty conditions, grid compliance and augmentation also affect the design. A technically coherent solution should be developed before supplier quotations are compared. Altair’s system design service can translate the preferred strategy into a clear owner’s basis of design.

4. Build a financeable business case

The model should separate contracted, forecast and speculative income. It should include capital cost, development cost, connection works, maintenance, software fees, insurance, degradation, augmentation, efficiency losses and replacement timing.

Sensitivities should test tariffs, cycling, availability, market prices and dispatch performance. The important question is not whether the central case produces an attractive return, but whether the project remains acceptable when the principal assumptions move.

Information Required

• Interval electricity demand and on-site generation data.
• Tariffs, demand charges, import-export limits and connection agreements.
• Single-line diagrams, plant schedules and available installation space.
• Planned changes to loads, generation or operating hours.
• Proposed market services and route-to-market terms.
• Supplier specifications, warranties and degradation assumptions.
• The owner’s investment criteria and risk requirements.

Common Battery Assessment Mistakes

• Sizing from annual consumption: storage value depends on timing and duration.
• Confusing kW and kWh: power and energy capacity must each match the intended duty.
• Double-counting revenues: simultaneous services may compete for the same capacity.
• Ignoring degradation: cycling, temperature and state of charge affect usable life.
• Assuming perfect optimisation: forecasts, controls and operational constraints limit dispatch.
• Comparing headline prices: exclusions, warranties, integration and replacement obligations matter.

Market and Strategic Context

The role of storage continues to expand as electricity systems add renewable generation and require more flexibility. The International Energy Agency’s review of batteries and secure energy transitions provides useful context, but a site-level decision must still be grounded in local tariffs, network rules and operating conditions.

What a Decision-Ready Study Should Deliver

A decision-ready commercial battery storage feasibility study should identify the preferred use cases, power and usable energy capacity, control philosophy, expected cycling and principal interfaces. It should present a transparent financial model, downside sensitivities and a clear recommendation: proceed, redesign, defer or stop.

The output should also define the information and technical requirements needed for a disciplined procurement process.

Request an Independent Project Review

Altair Energy Partners reviews battery projects before investment approval, procurement, refinancing or contract award. Contact us to discuss your site data, commercial objective and appropriate scope.