How many mAh or Wh to run a fridge all night?

[jtice]

Anyone have a ballpark idea how many mAh or Wh it takes to run a fridge all night?

Reason I ask, I have decided instead of running dual batteries I am going to get one of those portable power banks that have 12V, USB, and 120V inverters.
For me, it will be more versatile, especially since I also have a Jeep that I take trips in and can use it in it also.
There are tons of them out there in all sorts of capacities, just trying to get an idea of how large of one I should get.

 

[Dillusion]

First you nuts if you going run it on just batteries. But my math can be wrong but I'll give it a shot.

A Dometic RM4223 (Just an example) draws 10A @ 12VDC.

So a 10AH battery will provide 1A for 10 Hours or 10A for 1 Hour. So for 24 Hours you theoretically need 240AH and your battery will be toast.

Forgive me if I'm wrong its been a while.

 

[Mgyver1]

First you nuts if you going run it on just batteries. But my math can be wrong but I'll give it a shot.

A Dometic RM4223 (Just an example) draws 10A @ 12VDC.

So a 10AH battery will provide 1A for 10 Hours or 10A for 1 Hour. So for 24 Hours you theoretically need 240AH and your battery will be toast.

Forgive me if I'm wrong its been a while.

I'm thinking something in their CFX line will be more likely the style fridge the OP is looking to power rather than a stand-up RV fridge. So the CFX 50 has a MAX amp draw of 7.8a, however you have to consider that the fridge (even the stand-up version you mentioned) will be cycling on and off, with the frequency depending on how hot it is outside, how cold the fridge is set to be and if a insulated cover is used. According to Dometic's site, the CFX 50 in a 90 degree environment with the fridge set at 41 degrees will draw .77Ah/h. So assuming those conditions are there, the fridge would consume 18.5 Ah over 24 hours.

And I only mention the Dometic on a whim. I'm an Engel guy myself and I wheel with people running ARB, IndelB, SunnyDay or something, and there's lots of other brands out there.

[MENTION=296025]jtice[/MENTION] what fridge will you be running and in what weather? Having an inefficient fridge running inside the back of a SUV next to the window in Death Valley during the summer will draw significantly more power than an efficient fridge in a cool northern climate. So there's a lot of unknowns to give you any kind of reasonable guesstimate without knowing more details.

 

[Dillusion]

Sorry i just pulled the first fridge I clicked on to do some math. I didn't realize the other models were so much more efficient.

 

[jtice]

Sorry should have included that.
I have a CSI Black Ice Fridge
CSI 52 quart Fridge/Freezer $459.95 | Tacoma World

I live in West Virginia, but do plan on doing some trips out west.
It will be in the back of a 4Runner of 2dr JK at all times.

 

[Dillusion]

Not much info on the web site. What does the sticker on the fridge say or you waiting on it to come in still?

 

[jtice]

This is all the manual says. No usable info really.
I am going to plug it up and use a meter to see what amperage it draws.

 

[fourwd1]

Moving to OT

 

[jtice]

Here is what the fridge draws.

On Max
56 Watts
4.8 Amps @ 11.61 Volts

On Eco
39 Watts
3.3 Amps @ 11.84 Volts

 

[Mgyver1]

Here is what the fridge draws.

On Max
56 Watts
4.8 Amps @ 11.61 Volts

On Eco
39 Watts
3.3 Amps @ 11.84 Volts

That CSI fridge looks the same as an IndelB, which is the same as an Iron Man, same as Waeco, same as Smittybuilt and I’m sure a few more. So you can look at all those to get an idea of typical Ah usage. Best bet is get the biggest battery you can so that you can run more stuff like lights without worry. A group 31 is a popular deep cycle battery and an AGM is typically rated around 100 Ah, but consider the battery can only use about 50% of that.

To power my fridge and charge cell phones at the beach I run a group 24 deep cycle battery rated at about 85 Ah being charged by a 100w solar panel. So far this setup has kept things running for 5 days (longest I’ve used it in that configuration).

 

[Mgyver1]

This guy seems pretty handy and only weighs 12 lbs. since my 80 Ah battery has only 50% usefulness and this is a 44Ah lithium, they actually have nearly the same capacity.

Lithium444 Power Pack by Flexopower


| FLEXOPOWER INC.

 

[jtice]

Yea I would rather use something Lithium based.
That unit looks pretty nice. Thanks for the link.
TONS of these out there, I will certainly be researching these for a while.