A relay control box can be used to switch things on and off that in some cases draw too much current for the instrument control itself,or even a fridge,using a light dependent resitor to control a 12 volt relay and you can switch your boats fridge off and on when the sun disapears. Given that most modern 12 volt fridges will run easily with two 100amp batteries and a single 60amp solar panel,this is a handy mod to make yourself.
Notty is checking a double pole switch to see which connections we need to control an autopilot 12volt drive unit that draws 16amps,which is rather more than the max load (12amps) the control unit is made to work with.
I thought about the fridge control he designed years back and asked him could he design a control unit that switches two ways,left and right,he came up with the drawing when back in the UK,he is now out here on holiday and making up the required control.
Contact me for more details and a diagram.
Roy
Hout Bay (bay of fog)
phone on 021 7903859 or by email
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