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10 posts

Wannabe Geek

#288301 19-Jun-2021 11:48
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We are moving into detailed design stage of a new off grid house. 


It will be single-level and all Structural Insulated Panel construction.


Including a steel SIP panel roof which is also the ceiling all in one (and not great for cutting holes for downlights or even wires and pipes). 


So the current hope is to use LED lighting throughout, powered by DC more or less direct from the batteries. I imagine broad ledges around all the walls, concealing LED strips (lighting the ceiling from below) and in some places, LED downlights also in the ledges. 


We will also need air moving fans and water pumps, both of which I imagine use DC. The house will be so well insulated that I don't expect to need much heating (if any).


I quite like the idea of wireless switches (because they require less wiring, and a bit because they might allow for some automation like timers, PIR sensors). 


Has anyone gone down this road recently? I would really like to learn from your experience (and then share mine). 











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1886 posts

Uber Geek

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  #2731002 19-Jun-2021 12:04
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Sounds like a very interesting project. Where are you building?

I am at the same stage with a more conventional build, but will be high performance with air tight wrap, and an internal service cavity.

I am planning to run CAT6A cables to my light switches and wire them back to a central location where an Arduino based device will monitor the switches and publish messages over MQTT for the physical light actuators (DIN mounted KNX relay and dimmer modules) to turn the lights on and off.

Not quite what you are talking about doing but certainly not the conventional wiring scheme.


10 posts

Wannabe Geek

  #2731010 19-Jun-2021 12:23
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We are building in the Brynderwyns, overlooking Bream Bay at the south end of Northland. Where are you?


I was also considering Cat6 and PoE to power the LEDs etc, but wondered if that was not overly complex compared to 'ordinary' DC wiring with smart switches. 


I should look at the KNX stuff though, it might be the answer. Thanks. 



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Uber Geek

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  #2731012 19-Jun-2021 12:26
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I am down in ChCh. KNX isn't the cheapest but it uses low voltage bus wiring which might suit your place.

Would recommend talking to if you decide to go siren that route.

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