Free calculators to AS/NZS 3000:2018, AS/NZS 3008.1.1:2025 and AS/NZS 5033:2021. No account needed.
Size the cable, derate it, and get it into the conduit.
Check the circuit clears a fault: transformer fault level, loop impedance, short-circuit withstand and the earth.
Motor currents, power factor correction and the generator to run it all.
PV string voltages and the AC side's voltage rise.
Demand for the whole installation, and the drawing to go with it.
The everyday conversions: kW to amps and back, kVA, three-phase power and Ohm's law.
