Marine Electronics Forum

Marine Emergency Power Supply

Old 04-30-2008, 10:13 AM
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Default Marine Emergency Power Supply

Just saw this on Capnjack's website on sale. Looks like it might solve some of the problems with electronics shutting down when you start the motor when on the same battery.
Old 04-30-2008, 01:39 PM
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Default Re: Marine Emergency Power Supply

Certainly better than just using the start battery alone but that's essentially just adding another battery dedicated to the electronics only it may or may not be fully islolated. If going to the trouble to add that why not go ahead and add a regular higher capacity deep-cycle battery that would have longer reserve & enough juice to possibly start the engine(s) if there is a problem with the mains? It seems odd they don't give any specs on that backup. Nice looking cover though.
Old 04-30-2008, 02:56 PM
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Default Re: Marine Emergency Power Supply

Pass. I am with TTaxi on this. For the trouble/cost. Just get a real battery. One that can possibly start the motor if needed.

Majority of the time when starting the motor. My DSM300 goes wacko and I lose depth reading.

Until I get around to installing a dedicated house battery for all my electronics. I installed an Alumapro 5 farad capacitor (not a cheaper alternative - however I had one laying around) to help maintain the voltage drop. So far it has been working.
Old 04-30-2008, 08:35 PM
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Default Re: Marine Emergency Power Supply

You guys should check out the PowerPak12 for emergency power. You can run your electronics through it, it will put out 12V power until your batteries run down to virtually nothing. You can optionally install a small motorcycle sized battery too which will get charged from the powerpak12. Its a pretty neat little device, I put one in my boat and my dsm300 problems are gone, I have a 2 battery setup too using the Blue Sea 7650 switch and combiner.

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