Electrical schematics in your browser
WireElectric is drawing software for electrical installations in campers, caravans, boats and off-grid systems. Drag real components — MultiPlus, MPPT, Argofet, Orion-Tr Smart, batteries, fuses, 230V groups — onto the canvas and the app works out the voltage per net, the cable size you need and which protection fits.
Drawing and validation are free and work without an account. You only need an account to save.
You place real devices instead of blocks, and the diagram calculates along while you wire it up.
Lead or LiFePO4 batteries, fuses and fuse holders, busbars, inverters, MPPT charge controllers, DC-DC chargers, alternators, 230V circuits and loads — plus Victron models such as MultiPlus, SmartSolar, Orion XS, SmartShunt, Lynx Distributor and Cerbo GX.
Every component has its own terminals. WireElectric knows which one is positive, negative, AC, DC, input or output and tells you when two terminals do not belong together.
For each cable you enter cross section, length and material. You see the voltage drop in volts and in percent and whether the cable can carry the current.
The check looks at whether a circuit is protected and whether the fuse rating suits the cable behind it.
The diagram is checked for voltage per net, missing earth, cables that are too thin and fuses that do not fit. Errors and warnings sit together in the check drawer.
After half an hour of drawing you do not have a picture but something you can buy parts and build from:
Search the library for MultiPlus, SmartSolar, Lynx, Cerbo, batteries or fuses and drag the component onto the drawing. Every component carries the terminals of the real device.
Connect terminal to terminal. Wire colour follows polarity and domain, and per cable you enter size and length.
Findings react to your drawing right away: a missing return path, an overloaded cable, the wrong voltage or an undersized fuse. Then print the schematic or keep it as a PDF.
Drawing and checking work without an account. Saving needs a free account; what an export without watermark costs is shown under credits in your account.
The same drawing on a large screen and with your fingers on a touch screen.
12V, 24V and 230V side by side. The app resolves the voltage per net — including two 12V batteries in series — and warns as soon as a device sits on the wrong voltage.
Symbols are generated from the component data, so the terminals match the device: AC in, AC out 1 and 2, DC, Ground and Energize.
Enter cable size, length and current per connection; the validation computes voltage drop and reports undersized protection or missing earthing.
Print a schematic or save it as PDF to take to the installation or share with your installer.
In an ordinary diagram tool a battery and an inverter are both a rectangle. Such a program does not know how much current runs through a cable, which fuse suits it, what voltage a net carries, which terminals a component has or where an electrical mistake is.
A 12V installation with inverter/charger, solar, a DC-DC charger from the alternator and 230V groups on shore power.
Camper diagram →On-board system with a split charge relay or ArgoFET, service and starter batteries, ground to the hull and shore power with earth leakage protection.
Boat diagram →A 24V or 48V setup with solar chargers, battery bank, busbars and fuses, including voltage drop over long cable runs.
Off-grid diagram →Five worked installations with battery, fuses, main switch, charge controller and inverter — each diagram shows exactly which parts it uses and what they are wired to.
Example diagrams →A page per system type, plus calculators for wire gauge, fuses, voltage drop and battery capacity.
Find the cross-section that suits your 12V or 24V system, based on current, length and voltage drop.
View →Find a suitable fuse for your circuit, including a check on whether the cable can carry it.
View →Check how much voltage you lose over a cable and what reaches your load.
View →Work out how much battery capacity in Ah you need for your daily use and autonomy.
View →Calculate how long a battery can power a load, including the usable share and inverter losses.
View →Convert power straight to current at 12V, 24V, 48V or 230V.
View →Work out indicatively how many Wp of solar panels your daily consumption needs.
View →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.
Open WireElectricWireElectric uses components with their own terminals and electrical properties and calculates with them: voltage per net, current per cable, conductor size, voltage drop and fuses.
WireElectric is developed and maintained in the Netherlands by Twiks. Component data comes from manufacturer documentation wherever possible. The checks help you design, but they are not an inspection: have an installation reviewed by a professional when in doubt.
Each page shows what you can draw and check in WireElectric for that type of installation.
Electrical schematics in your browser
Drawing and validation are free and work without an account. You only need an account to save.