Tesla Battery Review
premiumThe Tesla Powerwall is the world's most recognisable home battery. The Powerwall 3 integrates a solar inverter, battery, and backup gateway in a single unit. Industry-leading brand recognition and a mature app ecosystem for monitoring. Premium pricing but a complete, polished package, and Tesla's time-limited "Next Million Powerwall Rebate" promo ($850 per Powerwall 3, max $1,700) takes some of the edge off while it lasts.
$14,000-$16,000
Installed price range
10 years
Warranty period
United States
Country of origin
1
Products available
Tesla Battery Models
Prices are NZD installed, GST inclusive, indicative June 2026. Specs are indicative - confirm current models with your installer.
| Model | Capacity | Peak Output | Continuous | Chemistry | Weight | Backup | Price |
|---|---|---|---|---|---|---|---|
| Tesla Powerwall 3 | 13.5kWh | 11.5kW | 5kW | LFP (Lithium Iron Phosphate) | 130kg | Yes | $14,000-$16,000 |
Warranty Details
Duration
10 years
Capacity retention
70% at end of warranty
Pros
- Most recognised battery brand globally
- Integrated solar inverter (no separate inverter needed)
- Excellent app and monitoring
- Storm Watch auto-charges before bad weather
- LFP chemistry (safer, longer cycle life)
Cons
- Most expensive per kWh upfront
- Requires a Tesla-certified installer
- Cannot retrofit to all existing solar inverters
- Single fixed capacity per unit (13.5 kWh steps)
Compare Tesla with Other Brands
Frequently Asked Questions
How much does a Tesla battery cost in New Zealand?
A Tesla battery costs $14,000-$16,000 fully installed in New Zealand, GST inclusive (indicative June 2026). There is no government battery rebate here, but Tesla's time-limited "Next Million Powerwall Rebate" promo takes $850 off per Powerwall 3 (max $1,700) while it runs. Bank green home loan top-ups at about 0-1% promo rates are the main way to spread the cost, and battery prices are falling 10-15% a year.
What warranty does Tesla offer?
Tesla offers a 10-year warranty, guaranteeing at least 70% capacity retention.
Is Tesla a good battery for New Zealand homes?
Tesla is homeowners wanting a premium, all-in-one solution with the best app experience. The Tesla Powerwall is the world's most recognisable home battery. The Powerwall 3 integrates a solar inverter, battery, and backup gateway in a single unit.