Wire gauge calculator
Find the cross-section that suits your 12V or 24V system, based on current, length and voltage drop.
View →Free calculators
Calculators for 12V, 24V and 48V systems
Every calculator answers one question about your installation. WireElectric then runs the same calculations for every connection in your complete diagram.
- Free, no account needed
- 12V, 24V, 48V and 230V
Pick your calculation
Fuse size calculator
Find a suitable fuse for your circuit, including a check on whether the cable can carry it.
View →Voltage drop calculator
Check how much voltage you lose over a cable and what reaches your load.
View →Battery capacity calculator
Work out how much battery capacity in Ah you need for your daily use and autonomy.
View →Battery runtime
Calculate how long a battery can power a load, including the usable share and inverter losses.
View →Watts ↔ Amps
Convert power straight to current at 12V, 24V, 48V or 230V.
View →Solar panel calculator
Work out indicatively how many Wp of solar panels your daily consumption needs.
View →From calculation to complete diagram
WireElectric does not calculate this in isolation but for every connection in your own diagram: place the real components, draw the cables and see straight away where the cross-section, the fuse or the voltage drop is off.
You can start drawing without an account.
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By installation type
Camper diagram
A camper installation is a 12V system with a 230V part on top: battery, charge controller, solar panels, DC-DC charger, inverter and shore power. WireElectric lets you draw that diagram with real devices and checks every connection.
View →Boat diagram
On board two worlds sit side by side: the 12V or 24V system with service and starter battery, and 230V shore power with a land inlet. WireElectric draws both in one diagram and checks every connection.
View →Off-grid diagram
An off-grid installation is about three things: generating with solar, storing in a battery bank and converting to 230V. WireElectric draws that diagram with real equipment and checks cables and protection per connection.
View →Draw an electrical diagram
WireElectric is online software for drawing the wiring diagram of a 12V, 24V, 48V or 230V system. You pick real devices from the library, connect their terminals and the app checks every connection.
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