Battery Warranty Comparison

Not all battery warranties are created equal. Compare coverage duration, throughput limits, capacity retention guarantees, and exclusions across brands.

Calculate Your Warranty Value

Enter your usage patterns to see which warranty offers the best protection

Select Battery Model

Daily Cycles

Average number of full charge/discharge cycles per day

Usage Pattern

Time-Based Coverage

10 years

Throughput Limit

37,800 / 54,000 kWh (70%)

Capacity Retention

80% guaranteed

Projected Expiration

3.2 years (throughput)

Warning: Throughput limit will expire before time-based warranty at current usage.

Understanding Warranties

What to look for when comparing

Time-Based Coverage

Most warranties last 10 years, but some premium brands offer 15+. However, time isn't the only factor.

Throughput Limits

Total kWh you can cycle. A 10kWh battery with 36,500 kWh throughput = 10 years at 1 cycle/day.

Capacity Retention

Guarantees battery retains X% capacity. Typical is 70-80% after 10 years.

Common Exclusions

Installation errors
Environmental damage
Third-party component failures
Off-grid usage (some brands)

Red Flags

No Australian presence

Unrealistic throughput limits

Restrictive usage conditions

Popular Warranty Comparisons

Tesla Powerwall 2

Duration

10yr

Throughput

38k

Retention

70%

Strong brand reputation

Excellent support

Lower throughput

Expensive replacement

Good for light-moderate users

BYD Battery-Box HVS

Duration

10yr

Throughput

60k

Retention

80%

High throughput

80% retention

Requires approved installers

Best for heavy daily users

Sungrow SBR

Duration

10yr

Throughput

46k

Retention

70%

Good value

Modular expansion

Standard retention only

Solid mid-range option