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hi i found a 12v refrigerator that states it runs at "12v dc @ 7a MAX"
can someone translate this for me? can i run a battery isolator and a seperate battery to run this 24/7 or will i need a solar panel as well?
can someone translate this for me? can i run a battery isolator and a seperate battery to run this 24/7 or will i need a solar panel as well?
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Los Angeles
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Re: how much power is 12v dc @ 7a MAX?
Mon, June 22, 2009 - 9:04 AMYou have to know if it has a thermostat in it. some 12v run constantly, like the cooler type. If it doesn't shut off when reaching temp. then no you can't run 24/7 on a battery, it will drain to quickly. those you only run when you engine is running ( charging) . as far a solar goes it would take a good size unit to power that many amps. -
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Re: how much power is 12v dc @ 7a MAX?
Mon, June 22, 2009 - 8:32 PMim not sure i assume it does but anyway here is the one im looking at right now
cgi.ebay.com/ws/eBayISAPI.dll -
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Re: how much power is 12v dc @ 7a MAX?
Mon, June 22, 2009 - 9:27 PMThat unit is able to run off a variety of inputs. --- both Alternate at 110VAC and 220VAC, and Direct at 24Vor 12 or could even be rigged for 6V (as in a golf cart).
What is your power source?
As it's a transporter unit, it seems dedicated to vehicle use. Thus you'll need to know the power supply options of your intended transporting vehicle. -
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Re: how much power is 12v dc @ 7a MAX?
Mon, June 22, 2009 - 10:50 PMtrue briggi i wanted to run an isolater and a dedicated battery in my 4x4 to run this, will suppliment with a solar panel and charge controller if necessary, what size solar panel and battery bank do i need to use this 24/7? -
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Re: how much power is 12v dc @ 7a MAX?
Mon, June 22, 2009 - 10:50 PMbtw 12v while running in the rig fyi -
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Re: how much power is 12v dc @ 7a MAX?
Tue, June 23, 2009 - 7:55 PMwell at 84 watts you are looking about at what your car stereo likely runs. Your main battery would be a poor choice for main power for this... They are designed to give a big burst of energy very quick. Not great to draw a low level over a long time. Deep cycle batteries on the other hand are designed to do exactly what you are looking for. They can be charged solar and will run at that draw overnight. Remember though they take a longer charge cycle than your fast discharge battery.
You are gonna need an isolator and look at it the same as an RV.
JSin
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Re: how much power is 12v dc @ 7a MAX?
Tue, June 23, 2009 - 6:34 PMI don't get it why you need a blood transfusion transporter refrigerator in your offroad 4x4?
If you just need to keep beers cool there are many cheaper less complex less power-drawing options.
You'd need about 300 Kg. of large storage batteries to push 7amps at night all night.
You'd need a handful of 125 watt PV panels to keep batteries juiced.
Is this practical or even necessary for your app? Maybe going in over your head.
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Re: how much power is 12v dc @ 7a MAX?
Tue, June 23, 2009 - 2:15 PMI joined so I could attempt an answer. P(watts)=I(amps)XV(volts) so 12v X 7amps = 84 watts power consumption. I hope this helps a little.
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Re: how much power is 12v dc @ 7a MAX?
Sat, July 25, 2009 - 2:20 AMA self sustaining system would consist of about 200 watts of solar panel and at least 3 deep cycle 12v 50amp-hour batteries -
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Re: how much power is 12v dc @ 7a MAX?
Mon, August 3, 2009 - 12:10 AMthat equates to about $1,000 in solar panels and over $200 in batteries.
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