Example diagrams

Example wiring diagrams for campervan, boat and off-grid

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.

Every example is a real WireElectric design: open it in the editor with one click and adapt it to your own installation. The checks then follow the voltage of each net, the cable size and the fuse rating.

All example diagrams

Boat 24V with solar and shore power

24V service bank with SmartShunt, alternator charging through an Argofet, two solar panels on an MPPT, MultiPlus with shore power and a 230V circuit with RCBO.

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Camper 12V with solar and shore power

Complete camper system: solar with MPPT, alternator charging through an Orion-Tr Smart, MultiPlus with shore power and a 230V circuit, plus 12V loads behind a fuse box.

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Alternator to second battery (Orion-Tr Smart)

Starter battery charges the house battery through a fused Orion-Tr Smart DC-DC charger, both grounds bonded to the chassis.

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Off-grid 48V with home battery

48V battery bank on a Lynx Distributor, solar panels on an MPPT 250/100, MultiPlus-II with grid connection and a consumer unit feeding 230V loads.

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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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WireElectric editor showing a 12V campervan diagram: LiFePO4 battery, MEGA fuse, busbars, MultiPlus-II and SmartSolar MPPT with cables between the terminals.

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.

Wire gauge calculator

Find the cross-section that suits your 12V or 24V system, based on current, length and voltage drop.

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Fuse size calculator

Find a suitable fuse for your circuit, including a check on whether the cable can carry it.

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Voltage drop calculator

Check how much voltage you lose over a cable and what reaches your load.

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Battery capacity calculator

Work out how much battery capacity in Ah you need for your daily use and autonomy.

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Battery runtime

Calculate how long a battery can power a load, including the usable share and inverter losses.

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Watts ↔ Amps

Convert power straight to current at 12V, 24V, 48V or 230V.

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Solar panel calculator

Work out indicatively how many Wp of solar panels your daily consumption needs.

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