Switchy: technical details for van converters

Updated 9 October 2026Switchy

Switchy is a pure relay board with eight channels: four DC channels up to 30A and four AC channels up to 10A or 2300W at 230V. All channels can be controlled individually and named freely in the dashboard. This page summarises the technical details needed for planning and installation in series vehicles.

Relays and switching functions

  • 4 DC relays, each up to 30A continuous load, individually controllable, NO/NC/COM terminals
  • 4 AC relays, each up to 2300W at 230V~ or 10A, individually controllable, AC side galvanically isolated, NO/NC/COM terminals
  • Relays are pulled in with full current and then held with a PWM holding current, which significantly reduces standby consumption
  • Switching time in the range of a few milliseconds
  • Weight 453g

Important for planning: Switchy does not measure. It is a switching module. Consumption measurement per load is done by Ampy, battery and system data come via Volty or the shunt.

Mains monitoring and protection functions

  • Integrated AC check input for live, neutral and protective earth, galvanically isolated
  • Detects wiring faults such as swapped live and neutral or protective earth faults, as found on Schuko shore power connections and poorly installed campsite hook-up posts
  • Automatic shore power detection, usable as a trigger for automations, such as switching the boiler or air conditioning on and off, configurable in the dashboard
  • Faults are reported on the SmartKnob and in the dashboard, and in a critical case all AC channels are switched off automatically

Motor control

  • Direct control of lift beds and other motors, both 230V AC, such as roller shutter motors, and 12V and 24V DC motors
  • Two inputs for end position detection, for example reed contacts
  • Direction lock: for lift bed motors, driving both directions at the same time is prevented electronically

Installation, connection and pairing

  • All inputs and outputs via tool-free spring terminals, no crimping needed
  • Pairing with the SmartKnob in seconds, feedback by LED and sound, status visible in the dashboard
  • Scope of delivery: 1× Switchy, 4× mounting screws, 3× two-pole pluggable spring terminal connectors (1× power supply, 2× end stop inputs)

Consumption and wireless

  • Normal operation 56mA at 12.7V, equivalent to 0.71W. With all relays pulled in 178mA, equivalent to 2.26W
  • Wireless connection to the SmartKnob reliable up to a distance of about 15m
  • Fanless and maintenance-free

Diagnostics and messages

  • Self-diagnosis with automatic reporting of communication faults, connection problems or relay faults, with automatic recovery
  • Real-time warnings and fault log in the dashboard

Safety and standards

  • Protection against overvoltage and undervoltage, reverse polarity and overtemperature, self-resetting fuses for reliable continuous operation even after a fault
  • CE compliant, tested to the relevant EMC and safety standards in an accredited external laboratory
  • Operating temperature -20°C to +80°C
  • Supply voltage 9-36V DC, so 12V and 24V electrical systems

Updates

  • Firmware updates via the dashboard
  • Wi-Fi is only activated for updates and otherwise stays switched off, which saves energy

Related questions

What can I switch with Switchy?

Up to eight devices from one place: • 4 channels for 12V and 24V, each up to 30A, for example a pump, a fan or a lift bed • 4 channels for 230V, each up to 10A or 2300W, for example a boiler or sockets Appliances that draw much more, such as an air conditioner, a tumble dryer or an induction hob, do not belong behind Switchy. They get their own circuit breaker in the 230V distribution. More on this in [Switching loads with Switchy](/blogs/wissen/verbraucher-ueber-switchy-schalten).

Can I connect wall push buttons to Switchy?

No, Switchy has no push button inputs. You switch its channels on the SmartKnob or in the dashboard, also on a schedule or as part of a scene. If you also want to switch a device at the wall, connect it to Ampy or Lighty instead. There you can connect a push button to every output.

Does Switchy show what my devices consume?

No. Switchy switches, it does not measure. Ampy measures what each individual device draws, output by output. Battery and system data come from Volty. All three work together in the same dashboard.

Which fuses do I need for Switchy?

Switchy has no fuses of its own for the connected devices; they belong in the installation: • 12V and 24V: each channel gets its own fuse in the positive cable, no more than 30cm from the battery's positive terminal. • 230V: a 30mA residual current device and a B10 circuit breaker sit in front of Switchy. Only a qualified electrician may carry out the 230V installation. Why it has to be a B10 is explained in [Why a B10 circuit breaker is needed at 230V](/blogs/wissen/warum-lss-b10).

What happens if the shore power pillar is wired incorrectly?

Switchy checks the shore power continuously and shows you on the SmartKnob and in the dashboard whether everything is in order. • If the earth is missing, Switchy switches off all four 230V channels within milliseconds and the SmartKnob raises an alarm. Once the earth is back, you switch your devices back on yourself. That way nothing starts up unattended. • If live and neutral are swapped, it is almost always down to a Schuko plug or adapter. Pull the plug, turn it by 180 degrees and plug it back in. All the details in [What the AC input monitoring does](/blogs/wissen/was-die-ac-eingangsueberwachung-macht).

Can Switchy react automatically when I plug into shore power?

Yes. Switchy detects whether shore power is present, and you can use that as a trigger in the dashboard. For example, the boiler switches on as soon as you plug in at the campsite and off again when you unplug.

See all questions

Still have questions? We'll help you personally.

Get in touch