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Old 30-08-2016, 10:52   #46
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Re: Frig using too much power

Let’s try again

Your observation is that ” The compressor ran 69% of the time.”

What is the temperature of the freezer and of the refrigerator when the compressor cycle off (when the thermostat cut off) and what was the electrical current just before cut off?

By the way some specifications for yours CR 1110 state: Power 2.5 Ah/h at 32 degrees C
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Old 01-10-2016, 03:53   #47
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Re: Frig using too much power

Could Ann of s/v Insatiable suggest ways of improving insulation - both in types of insulation and how to install, especially if/when access to exterior is not always available as if often the case.
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Old 01-10-2016, 05:32   #48
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Re: Frig using too much power

I just had a look at your fridge on you tube. Looks like a small home fridge. All bad , not enough insulation, huge front loading door . To get an efficient fridge on a boat that dosent eat your batteries they have to be well insulated, R20 or even better R30. That works out to be around 6 inches of wall thickness , by the looks of the CR1110 it has 1 or 2 inches of insulation . Also they should only be top loading so you don,t loose all the cold inside every time you grab a beer . So this computes into more BTUs of heat getting into the fridge then the small compressor can take out.One thing about living on a boat , our ideas of a fridge has to drastically change . Land based fridges have massive compressors that are driven from the an infinite amount of power that can be put out by your outlet. Put an amp meter on your home fridge and take a look at the power it takes ! Yikes !! So it can over come the poor insulation.
So sorry no "magic bullet"
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Old 01-10-2016, 06:25   #49
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Re: Frig using too much power

Quote:
Originally Posted by typhoon View Post
I just had a look at your fridge on you tube. Looks like a small home fridge. All bad , not enough insulation, huge front loading door . To get an efficient fridge on a boat that dosent eat your batteries they have to be well insulated, R20 or even better R30. That works out to be around 6 inches of wall thickness , by the looks of the CR1110 it has 1 or 2 inches of insulation . Also they should only be top loading so you don,t loose all the cold inside every time you grab a beer . So this computes into more BTUs of heat getting into the fridge then the small compressor can take out.One thing about living on a boat , our ideas of a fridge has to drastically change . Land based fridges have massive compressors that are driven from the an infinite amount of power that can be put out by your outlet. Put an amp meter on your home fridge and take a look at the power it takes ! Yikes !! So it can over come the poor insulation.
So sorry no "magic bullet"
A bit extreme this one example, but still only a medium size home fridge in US standards, so.. Yup.
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Old 01-10-2016, 15:07   #50
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Re: Frig using too much power

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Originally Posted by ErikFinn View Post
A bit extreme this one example, but still only a medium size home fridge in US standards, so.. Yup.

Yep , that's 20 amps at 12 volts . Scary ! Try running that at 50 percent duty cycle , that's 240 ah , but home fridges run more like 75 percent of the time or more .

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