TOPIC COLLECTION
Electrical power
A focused path through related explanations and calculation tools.
LEARN THE SYSTEM
Guides in this topic
Plan the low-voltage DC path from battery to inverter
Turn load power into current, voltage drop and runtime without treating a calculator as a cable design.
Turn a single-phase appliance load into a circuit brief
Collect the inputs an electrician needs, estimate steady current and voltage drop, and keep protection and cable selection as explicit design decisions.
USE THE NUMBERS
Calculators in this topic
DC cable voltage drop
Estimate copper-cable voltage drop, percentage loss and heat at a steady current.
Inverter DC input current
Convert an AC load and inverter efficiency into approximate battery-side power and current.
Battery runtime from a steady load
Estimate ideal runtime from nominal energy, usable fraction, inverter efficiency and load.
Inverter running and motor-start screen
Compare one documented motor start plus other loads with derated continuous and surge inverter ratings.
DC cable area for a voltage-drop target
Estimate the copper conductor area needed to keep steady DC voltage drop below a chosen percentage.
Single-phase AC load current
Convert real input power, voltage and power factor into apparent power and approximate steady current.
Single-phase copper voltage-drop screen
Estimate the resistive part of voltage drop and cable heat for a two-conductor single-phase run.