This is for a 24V Victron Phoenix inverter
. You can use the diagram for a 12V or a 48V model as well, but you need to calculate the resistor values for those voltages. Link to spec sheet: https://www.victronenergy.com/upload...-1200VA-EN.pdf
We use these small inverters (250VA - 1200VA) for use in a cabin
, so that the big inverters can be switched off. The small inverters are used for a fan, entertainment system, charge a phone
etc. They are often used all night.
The switch used is from APIELE: pretty, waterproof, 3/4" / 19mm diameter with a built in LED ring. There is a resistor inside the switch to connect the LED straight to 12V for automotive applications. This means we need to do something for different voltages anyway, but it is much too bright at 12V so it requires modification no matter what.
The yellow wire from the switch is the Normally Closed contact, which isn't used.
This diagram results in a dim LED ring whenever the fuse box has power
(for us, this means when the cabin
breaker is switched ON). When you press the switch, the LED ring becomes brighter and the inverter
connector of the inverter has two pins. Remove the wire bridge from the connector (you can pull the connector off the inverter) and connect the circuit from the switch to the left hand contact of the connector. Leave the right hand contact disconnected.
I have tested this with the green LED version of this switch. At 12V the LED current
is 7mA. The resistor values in the diagram set the current
to only 2mA when the inverter is on and a minute 0.1mA when the inverter is off. This is for a 24V feed.
The diode is to isolate the inverter remote
input from the LED. You can solder and hide these components inside heat shrink, straight on the wiring
The overall dimmed function takes away the annoying bright LED at night. It also shows that the inverter has power
even when switched off. We use the same kind of switches for lights where we use a blue LED ring; by lighting
the rings even when off, you can identify what it is for by the color and by changing intensity you also get feedback if the circuit is off or on.