A Strong Battery Market Does Not Automatically Make Your Battery Project a Good Inve

Australia’s battery market is growing rapidly.

So does that mean businesses should be moving quickly to invest in batteries?

Not necessarily.

The Australian Energy Regulator’s 2026 Wholesale Electricity Market Performance Report shows that installed battery capacity in the National Electricity Market increased from 2.2 GW to 6.1 GW during 2025 — almost tripling in one year.

The AER also observed that batteries currently appear to have a relatively strong commercial case among recent forms of new investment.

That is an important market signal.

But for a business considering its own battery investment, it does not answer the most important question:

Does a battery make commercial sense for our business?

Market opportunity is not the same as project economics

Consider two businesses looking at similar battery systems.

The first is a cold-storage facility with significant overnight electricity consumption and periods of high demand.

The second operates mainly during the day and already has substantial onsite solar.

They are operating in the same Australian battery market.

They may even be considering similar equipment.

But the economic value that a battery can create for each business may be very different.

Why?

Because the investment case depends on the business itself.

When does it consume electricity?

Where do its major energy costs arise?

Does it experience significant peak demand?

How much onsite solar generation does it have?

What is the battery actually expected to achieve?

Demand-related cost reduction?

Greater use of onsite solar?

Value from electricity price differences across different times?

These are business-specific questions.

That is why:

Same Battery. Different Business. Different Investment Case.

The payback period is only the output

Now consider a hypothetical example.

This is not a real client case or an Australian market benchmark.

Suppose a business is considering a AUD 400,000 battery investment.

The project financial model assumes the battery will generate AUD 100,000 of annual economic benefit.

On the surface, that gives a simple payback period of:

4 years.

That sounds attractive.

But the more important question is:

Where does the AUD 100,000 come from?

Assume the model includes:

• AUD 40,000 from reducing demand-related costs;

• AUD 30,000 from value created through electricity price differences across different times;

• AUD 30,000 from other expected benefits.

Now apply a simple stress test.

Suppose the demand-related benefit is not AUD 40,000, but AUD 20,000.

And suppose the price-spread benefit is not AUD 30,000, but AUD 15,000.

Annual economic benefit falls from:

AUD 100,000 → AUD 65,000

The simple payback period moves from:

4 years → approximately 6.2 years.

The battery did not change.

The assumptions did.

This is why management should be careful about focusing only on the headline payback period.

Payback is an output. Assumptions are the inputs.

A strong market does not remove project-level risk

The broader Australian battery market may have a strong commercial opportunity.

But that does not mean every individual C&I battery project automatically has a strong investment case.

The AER has also noted that recent reductions in electricity price spreads may affect the battery investment outlook.

Battery economics can also depend on when and where value is created and which market services the asset can realistically access.

For a business owner, CEO or CFO, the relevant question is therefore not simply:

“Is the Australian battery market attractive?”

It is:

“What evidence supports the economics of this battery in our business?”

Before committing capital, management should understand:

What value is the battery expected to create?

Which assumptions are supported by the company’s own data?

Which assumptions depend on future market conditions?

And if the more optimistic assumptions do not materialise, does the investment still make sense?

Market Opportunity ≠ Project Economics ≠ Investment Readiness

These are three different questions.

A strong market can justify paying attention to an opportunity.

It cannot, by itself, justify an individual investment.

That requires business-specific evidence.

My view is simple:

Market opportunity determines whether something deserves attention.

The company’s own evidence determines whether the investment deserves its capital.

That is the distinction between following a market trend and making an investment decision.