Chartplotters - power consumption.

mick

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Do modern 12v chartplotters, such as SH cp180 or Garmin Gpsmap 550 use much power? I ask because my handheld Garmin 12 gps eats batteries.
 

nathanlee

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The cp180i uses relatively little really. I can't remember the exact figure, but it was in the order of half an amp.
 

noelex

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There are quite large differences in power consumption between different units. The Raymarine C90W for example uses 32watts (Typical). It is a bigger screen,which uses more power, but that is a lot of power, about 2.5A, before adding radar etc.
The specifications are usually available from the manufactures web site, its worth comparing power consumption figures when deciding chartplotters, especially for a cruising yacht
 

nathanlee

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[ QUOTE ]

Clearly your memory was pretty spot on. Certainly better than mine.

[/ QUOTE ]

Only when it's something I'm interested in /forums/images/graemlins/tongue.gif

On a side note, according to the technical spec in the cp180 documentation, it's weight (without bracket) is 1,322lb.
No wonder poor little Kudu has a list!

/forums/images/graemlins/smile.gif
 

simonfraser

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my garmin 700mA, try running an anchor light 24/7 in the winter off a solar cell, that's more of a challenge.
 

mick

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[ QUOTE ]
my garmin 700mA, try running an anchor light 24/7 in the winter off a solar cell, that's more of a challenge.

[/ QUOTE ]

Which model is that? I can find no power details on the Garmin website.
 

Refueler

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[ QUOTE ]
Do modern 12v chartplotters, such as SH cp180 or Garmin Gpsmap 550 use much power? I ask because my handheld Garmin 12 gps eats batteries.

[/ QUOTE ]

It also depends on settings and size of machine ... taking the budget ~5" screen stuff ...

Full bright on display with all bells and whistles - most will consume about 600 - 750 mA. Some more if a lot of card reading.

Reduce the settings and you get to where the manuals normally sit ... about the 450 - 550 mA mark.

Reduce further such as backlight etc. some will have power save modes - you can get a plotter down to 250 - 350 mA.

You may ask why I don't quote manufacturers ... reason is that comparison of tests of various gear for precisely this have produced fig's that do NOT vary significantly across manufacturers.

My own tests started on my Lowrance that was used with a 7 A/HR power pack ... I was surprised at how quick the pack went down. So I tried it with Raymarine gear, Navman, SH etc. from other boats ... similar .... But then we started playing with ammeters and settings .... the difference on all was amazing - not set to set ... but settings to settings. As said before they all indicated similar mA figs whatever machine we tried - we are talking fixed plotters on 12v power.

So next time a salesman tries to convince you his set doesn't use as much power as another - send 'em to me !!
 

noelex

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[ QUOTE ]

It also depends on settings and size of machine ... taking the budget ~5" screen stuff ...
You may ask why I don't quote manufacturers ... reason is that comparison of tests of various gear for precisely this have produced fig's that do NOT vary significantly across manufacturers.



[/ QUOTE ]

The setting, particuarly backlighting does make a big difference, (power consumption with full backlighting is often 2.5X the consumption with the backlighting off) but I am still convinced there are big differences between units. I have measured consumption on quite a few boats and there are substantial differences between chartplotters of similar size.
If you are using manufactures figures Just make sure you compare like with like. The max consumption with full backlighting is the most commonly produced figure (which make the "typical" figure quoted by Raymarine for their c wide series particularly bad.
 
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