Free Solar Calculators

Free Solar Calculators
for Solar Technicians

Standards-compliant calculators for solar technicians 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

Solar Calculators

Dedicated calculators for solar technicians. Bookmark the ones you use most.

Size LiFePO4, NMC or AGM battery banks. Autonomy days and solar panel sizing.

Annual generation, FIT revenue, payback period and 20-year return for any NZ/AU location.