Is a home battery worth it in New Zealand?

It is financially promising when degraded bill savings comfortably recover the installed price within the warranty. The answer depends on real solar exports, evening use and the spread between import and export rates.

How should I compare battery quotes?

Compare installed price per usable kWh, warranted throughput, inverter power, included electrical work and payback using your own energy data.

Built around your real retail and solar buy-back rates

Does your New Zealand battery quote stack up?

Compare the installed price with the electricity you can realistically shift from daytime solar into the evening—using your own retail and solar buy-back rates.

X-ray my quote →Read the local payback guide

Your buy-back ratetreated as income sacrificed when solar is stored

Your retail rateused to value electricity the battery replaces

10 yearsthe common warranty window the payback should beat

Open methodology →

New Zealand calculator

Your quote.
Your tariffs. No sales assumptions.

Enter the final price and energy figures yourself. The X-ray shows what drives the result and what to challenge.

The local reality

A battery only earns from energy it actually cycles.

EECA’s public solar calculator does not include the costs or benefits of a battery. This tool fills that narrow gap without assuming a national subsidy or pretending every solar home needs storage.

Read the primary guidance ↗

Daily solar exportEntered by youavailable to charge

Tariff spreadRetail − exportlocal opportunity value

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Efficiency lossAdjustableenergy lost cycling

Not a generic sales estimate.Your quote economics.

Country-specific research

Answers built for New Zealand.

New ZealandNZ battery quote checklist

Interrogate price, capacity and installation scope

Read the answer →New ZealandNZ battery payback guide

Use retail and solar buy-back rates correctly

Read the answer →New ZealandSolar buy-back opportunity cost

See what stored solar gives up

Read the answer →New ZealandHome battery sizing guide

Match storage to exports and evening use

Read the answer →

Quick answers

Battery quote FAQs.

Is this a sales calculator?

No. The result appears before email capture, and installer contact is a separate opt-in.

Does it model every smart tariff?

No. The base result uses the rates you enter and deliberately excludes speculative tariff or virtual-power-plant income.

What should I enter as the battery price?

Enter the final installed price you pay after any tax treatment, rebate or installer discount.