How To Determine How Long A Battery Will Last When Powering A Portable Fridge

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Question:

if i use a 3000 watt inverter on a 12 volt batter how long can i run my portable fridge with draws 65 watts

asked by: Freddy

0

Expert Reply:

Watts divided by volts equals amps, so 65 watts divided by 12 volts is going to equal 5.42 amps. Your battery should have an amp hour rating that you can divide by 5.42 amps and then you'll know exactly how long the battery can maintain the draw from the fridge.

For example, the Go Power Lithium RV Battery # 34282738 has a 100 amp hour rating so you would get 18.45 hours out of the battery. That being said a fridge isn't going to constantly be running and depending on the climate you could use more or less power (i.e. the fridge will run less in cooler temps than on a warm summer day).

A 3000 watt inverter, like the Go Power Industrial Pure Sine Wave Inverter # 34278157, is a bit overkill if you're just using it for the fridge since it's only pulling 65 watts. You could easily get away with a smaller one like the # WC3720 you were looking at. You'll just want to make sure that you don't power any sensitive electronics (cellphone, computer, etc.) with an inverter that isn't Pure Sine Wave.

expert reply by: Kevin C

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Answer 1

For a 3,000 watt inverter you'll need a 300 amp hour lithium battery like the Go Power Sun Cycle Advanced Lithium RV Battery item #GP26QR.

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Answer 2

For the wattage you are looking for the Go Power Solar Extreme Charging System #34282185 would work really well. It has three panels but the wattage output is 3,000 watts running and 4,800 watts surge and comes with the converter and install hardware…

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Answer 3

There's a lot here, so let's go ahead and take these one by one, yes you can still use a plug-in portable solar kit, and as far as lithium batteries, their cost can be justified, but it's hard to give a blanket statement about worth.…

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Answer 4

It is hard to estimate exactly how much the Everchill RV Refrigerator w/ Freezer #EV37FR will run as it will depend on how often and the duration it is opened as well as the environment it is in. I find it best to breakdown how long you can expect it…

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Answer 5

Yes, since you already have two Go Power Overlander Expansion Kit #34282182, you will need to add the MC4 expansion branch connectors #GP22VR and #GP82VR, as well as some extension cables to be able to add a third panel. You should also verify that…

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Answer 6

Yes, it is! Honda and other manufacture's like to leave the fuses out of new vehicles that do not come with a functional towing package to save on costs. You can verify if you're missing the fuses by checking your fuse box but I am pretty…

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Answer 7

I spoke with my contact at Go Power and he said that under good sun conditions and with limited to no power draw, the 10 Watt Solar Panel Charging System #34273836 that you referenced should be enough to provide a sufficient trickle charge to your 2…

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Answer 8

The first thought people tend to jump to is charging an additional battery via the alternator. The problem with this solution is that unless you are only powering smaller accessories like cell phones the alternator won't be able to sufficiently…

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Answer 9

You can keep the same amperage and go with the Progressive Dynamics 4100 Series RV Converter w/ Charge Wizard and AC/DC Distribution Panel - 35 Amp #PD4135K or if you're wanting to expand your available circuit breaker/fuse space then you can go…

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How To Determine How Long A Battery Will Last When Powering A Portable Fridge

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