How Much Battery Does Your NSW Business Actually Need?

Start with the requirement, not the biggest option

For a NSW business considering battery storage, a useful question is not simply which system to buy. It is how much storage, if any, the business can justify. Batteries can help manage energy use and may reduce peak demand charges, but suitability needs an investment assessment. A larger proposal should face the same scrutiny as a smaller one.

Whether you operate a warehouse, restaurant, manufacturing site, shop or medical practice, ask for the proposed size to be explained against your own requirements. Avoid treating another business’s choice as a benchmark. The decision should leave room for a smaller system, a revised solar proposal or no battery purchase.

Ask what supports the proposed size

Begin by asking what information the recommendation relies on. How has your electricity use been considered? Which operating periods matter to the assessment? What energy-management outcome is the proposed battery intended to support? Ask the assessor to distinguish information supplied by your business from assumptions that still need checking.

Request a clear explanation of why the recommended size is preferable to a smaller option. What would the smaller option leave unaddressed? What additional benefit is expected from the larger one, and how has that benefit been assessed? If those questions cannot be answered clearly, the proposal may not yet be ready for an investment decision.

Keep solar and battery sizing as separate questions

If solar is part of the proposal, do not let one equipment choice become the sole justification for the other. Australian Government guidance says solar size depends on electricity use and timing, budget, sunny roof space and installation complexity. Ask how each of those considerations has shaped the solar recommendation before accepting the combined package.

Then ask for the battery component to be justified separately. Would the solar proposal still meet your objectives without storage? What would adding the proposed battery change? Solar businesses often continue buying grid electricity, so the combined proposal should not be assessed on an assumption that solar and storage automatically remove the need for grid purchases.

Compare options without assuming extra capacity pays

Ask for an investment assessment that compares the recommended battery with a smaller alternative and a no-battery option. Where solar is also being considered, include a solar-only alternative. Keep your stated requirements consistent across the comparison so you can see what each option is expected to address rather than simply comparing equipment descriptions.

Tariffs vary by customer and location. If reduced peak demand charges form part of the case for the proposed size, ask how that expectation relates to your business’s circumstances. If outage supply is included, require explicit confirmation of the backup configuration: a battery supplies outages only when configured for backup. Do not count an unconfirmed capability as a reason to buy more storage.

Use a decision checklist, including reasons to wait

Before approving a purchase, check that you can answer these questions: What requirement are we funding? Why this battery size? What smaller option was assessed? What does the no-battery comparison show? Which assumptions remain unresolved? Does the proposal fit our budget? If solar is included, have roof space and installation complexity been considered? If backup is expected, is its configuration confirmed?

Reasons not to buy include an investment assessment that does not support the expenditure, an unclear explanation for the proposed size or a proposal outside your budget. Waiting is also reasonable when essential assumptions remain unanswered. Choosing less—or choosing no battery—is a valid outcome, not a failure to proceed.

Make the site assessment a sizing review

For your next step, ask UR Energy about a NSW site assessment focused on validating the proposed system size. Bring your electricity-use information, tariff details, budget and questions about solar or backup. Request a reasoned comparison that leaves smaller, solar-only and no-battery options open where relevant before committing.