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Old 06-06-2016, 07:08 PM   #1
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How To Tell Electricity Went Off At Boat

Went to boat today and fans were off meaning at some time since last visit electricity had went off. How can you tell how long it was off? Did food in freezer defrost and refreeze?
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Old 06-06-2016, 07:14 PM   #2
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Went to boat today and fans were off meaning at some time since last visit electricity had went off. How can you tell how long it was off? Did food in freezer defrost and refreeze?
An interesting question! It would certainly be possible (and not all that difficult) to make a battery-powered circuit (probably with an Arduino board) which would do it, but I do not know of any commercial units available. I'll be interested to see if anyone knows of any.
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Old 06-06-2016, 07:17 PM   #3
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An electric analog clock or an analog timer will be off during the power outage and will restart when the power comes back. Time lost is the time power is out if less than 12/24 hours depending on device.
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Old 06-06-2016, 07:24 PM   #4
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Hello,
this system make shore power control and much more...

https://sirenmarine.com
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Old 06-06-2016, 07:33 PM   #5
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Greetings,
Mr. k. Real simple. Take a plastic water bottle. Fill it half full with water. Put it in the freezer ON IT'S SIDE. When frozen, stand the bottle upright. IF the freezer ever defrosts/thaws, the "pillar" of water in the bottle will melt and refreeze at the bottom of the bottle. Cost? Maybe $.05...
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Old 06-06-2016, 07:38 PM   #6
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An electric analog clock or an analog timer will be off during the power outage and will restart when the power comes back. Time lost is the time power is out if less than 12/24 hours depending on device.
Yeah, that would probably cover it pretty well. Few of us do military time these days (although I do), so probably 12 hours would be the normal limit for an analog clock. Not sure how long before frozen stuff will defrost enough pose a danger. So far as the OP, if it were me, and I was in doubt, I would toss the frozen stuff just on general principles. :-)
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Old 06-06-2016, 07:40 PM   #7
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Greetings,
Mr. k. Real simple. Take a plastic water bottle. Fill it half full with water. Put it in the freezer ON IT'S SIDE. When frozen, stand the bottle upright. IF the freezer ever defrosts/thaws, the "pillar" of water in the bottle will melt and refreeze at the bottom of the bottle. Cost? Maybe $.05...
Brillant!!! How in the everloving blue-eyed world did you come up with that, RTF???
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Old 06-06-2016, 08:42 PM   #8
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I spent a few minutes typing up how to make a simple relay outage timer, then decided to search for a page * to make it easier for you guys to see what I meant, and found something that would work for about $20.
Follow this link and you will see there's nothing to it.
I like the wall wart angle for the input, it will make it even cheaper since everyone has these lying around the junk drawer.
~Regards!

A $20 Power Failure timer

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Old 06-06-2016, 09:25 PM   #9
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RTF is always "the man"

Others here suggested a penny on top of an ice tray or similar....any melting and it settles in...

Simple concept, many posibilities.
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Old 06-06-2016, 10:19 PM   #10
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Greetings,
Mr. k. Real simple. Take a plastic water bottle. Fill it half full with water. Put it in the freezer ON IT'S SIDE. When frozen, stand the bottle upright. IF the freezer ever defrosts/thaws, the "pillar" of water in the bottle will melt and refreeze at the bottom of the bottle. Cost? Maybe $.05...
Simple yet effective. I think I'm gonna do this.
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Old 06-06-2016, 10:42 PM   #11
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How can you tell how long it was off?
Ask the power provider?
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Old 06-06-2016, 11:48 PM   #12
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couple ice cubes in a glass or bowel is easiest and requires no forethought.


Hi tech method is a marine alarm system. My Lowes Iris informs me of a power outage or a charger failure within seconds.

But I still keep a cup of ice cubes in the freezer just in case.
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Old 06-07-2016, 02:10 AM   #13
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couple ice cubes in a glass or bowel... requires no forethought.
I dunno, the second proposed location might..
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Old 06-07-2016, 05:08 AM   #14
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This what I use. Sends a text to your mobile when power is off and another when it resumes.
Not cheap but works well, cheaper than having your batteries ruined by running flat, cheaper than loosing your frozen food or having a bilge pump fail and your boat sinking.
Before I got this device my batteries went flat for possibly weeks and were never the same again, since I have had it I have had many power outages at several different marinas and I just call them up and let them know I have a problem and they are on to it.


www.blueray.com.au/SMS power monitor

Works for me.
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Old 06-07-2016, 05:54 AM   #15
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Reefer truck shippers have recording temp units to know how the load was kept during transport.

Steve Dashew sells a recording thermometer on his web site .
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Old 06-07-2016, 06:15 AM   #16
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Reefer truck shippers have recording temp units to know how the load was kept during transport.

Steve Dashew sells a recording thermometer on his web site .
I have one of these that I stuck in my refrig and freezer to determine what the cycle time was. Cheap and easy.

Waterproof USB Temperature Data Logger RC 5 Mini Recorder 32000 Points Sensor | eBay
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Old 06-09-2016, 09:39 AM   #17
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Greetings,
Mr. k. Real simple. Take a plastic water bottle. Fill it half full with water. Put it in the freezer ON IT'S SIDE. When frozen, stand the bottle upright. IF the freezer ever defrosts/thaws, the "pillar" of water in the bottle will melt and refreeze at the bottom of the bottle. Cost? Maybe $.05...
We use the same principle at work. Freeze a very small cup of water, then place a penny on top of the ice. So long as the penny remains on top, no thaw.
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Old 06-09-2016, 11:38 AM   #18
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Greetings,
Mr. l&f. Oh ya, sure...Now you've upped the cost to $.06. Where does it end?????

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Old 06-09-2016, 12:18 PM   #19
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Greetings,
Mr. l&f. Oh ya, sure...Now you've upped the cost to $.06. Where does it end?????
Brilliant
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Old 06-09-2016, 12:41 PM   #20
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If brown ooze is running out of the fridge/freezer, the power has been out for too long.
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