#21004 - 04/04/09 08:01 PM
Power supply question
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Ray Eden
journeyman
Registered: 01/09/03
Posts: 63
Loc: Bogota, NJ
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I've been converting my home over to 12v power. Just lawn lights ocelot etc and am looking to power everything from a a automotive type battery that is recharged with a solar panel. Will the Ocelot and secu's be able to handle the amperage and voltage from the battery? This will replace a slew of wall warts.
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#21065 - 05/03/09 10:35 AM
Re: Power supply question
[Re: Guy Lavoie]
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Ray Eden
journeyman
Registered: 01/09/03
Posts: 63
Loc: Bogota, NJ
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Next question.....
I've moved the Ocelot, 3 secu's, and a few other things to DC power. What I'd like to do now is that if the power drops below 12v from the external batteries due to extended periods of little or no sun, be able to switch to commercial power. Any ideas on how this can be accomplished? Did a search and can't seem to find anything helpful.
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#21066 - 05/04/09 06:32 AM
Re: Power supply question
[Re: Ray Eden]
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dahlheim
junior
Registered: 12/31/08
Posts: 39
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wouldn't it be feasible to apply the power source (through a voltage divider circuit of some sort if needed) to a secu input and use the ocelot to detect a drop. elk-912 relays powered by secu relays could reliably handle the power switching.
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#21067 - 05/04/09 06:43 AM
Re: Power supply question
[Re: dahlheim]
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Ray Eden
journeyman
Registered: 01/09/03
Posts: 63
Loc: Bogota, NJ
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Thought of that but since the Ocelot and secu's will be switched too and momentarily lose power then that defeats the purpose since the relay in the secu will reset. Need some type of external switching circuit or device.
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#21074 - 05/07/09 10:52 AM
Re: Power supply question
[Re: Guy Lavoie]
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Ray Eden
journeyman
Registered: 01/09/03
Posts: 63
Loc: Bogota, NJ
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Think I've solved part of the problem. I bought a new solar controller since I'll be adding 4 more panels that will bring the charging current to 10A and the new controller is good for 20A. This controller has a LVD feature that disconnects the load when the batteries fall below a certain point so as not to damage them.
I'll use a relay that will stay closed as long as power is coming from the load. I'll then use a secu16 relay to sense if this goes open and send an x10 command to turn on the 12V commercial power supply. It won't matter if the Ocelot restarts because that relay point will still be open so all will be good.
My only hurdle now is stopping the 12V commercial power supply from feeding back to the batteries and the controller. I found this diode on eBay and wonder if it would work. It's on eBay 1N1196A 20 AMP 400 VOLT RECTIFIER DIODE. Not sure if this would work any input?
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I live in my own little world. But it's OK. They know me here.
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#21120 - 05/25/09 08:47 PM
Re: Power supply question
[Re: Ray Eden]
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Ray Eden
journeyman
Registered: 01/09/03
Posts: 63
Loc: Bogota, NJ
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Problem solved using three relays and works like a charm. Now I have to see how much I save on my electric bill!
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