Free Battery Storage Calculators

Free Battery Storage Calculators
for Battery Storage Installers

Standards-compliant calculators for battery installers in NZ & Australia. Free, no signup required. Works on mobile.

Trade

Country

🇳🇿 New Zealand🇦🇺 Australia

Typical Electrician rate: NZD $85–$130/hr excl. GST (15%)

Desired annual take-home (NZD)

Income tax rate (%)

Check IRD for your bracket.

Billable weeks per year

Billable hours per week

Target profit margin (%)

10–20% is typical for a sole trader.

Total annual overhead

Battery Storage Calculators

Dedicated calculators for battery installers. Bookmark the ones you use most.

kWh and Ah sizing for solar storage or backup. LiFePO4, NMC, AGM — DoD and efficiency included.

How long will your battery power a given load? Runtime in hours and minutes with discharge current.