Battery prices are falling 10-15% a year

How much does a home battery actually cost in 2026?

Real New Zealand pricing for Tesla, BYD, Sungrow, and AlphaESS. No government rebate exists here, so what you see is what you pay. Up to 3 quotes from local installers. 100% free.

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$14,000-$16,000
Powerwall 3 (13.5kWh) installed
From ~$9,000
BYD / Sungrow entry systems
~$440/kWh
Expansion modules
10 years
Typical warranty

There is no battery rebate in New Zealand

No government scheme subsidises home batteries here. What does exist: bank green home loans from 0-1% promo rates, and Tesla's time-limited "Next Million Powerwall Rebate" promo ($850 off per Powerwall 3, max $1,700 - a manufacturer promo, not a government one). The good news: battery prices are falling 10-15% a year, and every kWh you store and use at home is worth roughly three times what a retailer pays you for exported solar.

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