Good Sam Club Open Roads Forum: Tech Issues: 12 V cooler
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Tyler0215

Iowa

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Posted: 08/16/20 06:37am Link  |  Quote  |  Print  |  Notify Moderator

I have a 12V cooler I carry in the cab while traveling to keep drinks and snacks cold. The owners manual says it draw 6 amps. Also when sightseeing we take the cooler with lunch. My question is, when stopped for an extended time, maybe a museum stop, how long will I be able to leave the cooler plugged in and how much will the battery drain, before the truck won't start? I'm a dummy when it comes to electricity.

agwill

enosburg falls, vt

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Posted: 08/16/20 06:57am Link  |  Quote  |  Print  |  Notify Moderator

Depends on your battery size, amp rating. Reserve rating of battery should show 20 amp draw for so many minutes, say 100 minutes or so. At a 6 amp draw at this example you would get about four times the use use. Perhaps 400 minutes or about 6 hrs of use. You should be fine for about 4 hours of run time and still start your vehicle. Take a chance and live life on the edge.


al

Lwiddis

Monterey, California

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Posted: 08/16/20 07:10am Link  |  Quote  |  Print  |  Notify Moderator

A slow study draw on a battery designed for starting your motor isn’t wise. The cooler warms up that fast? Not of good quality IMO.


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watt solar-parallel & MPPT, Trojan T-125s. TALL flag pole. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist14 yr. Army vet-11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad


KD4UPL

Swoope, VA

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Posted: 08/16/20 07:33am Link  |  Quote  |  Print  |  Notify Moderator

If this is a gas vehicle with only 1 battery I'll make a mostly wild guess and say it's about 50 AH at a 20 hour rate. Since your 6 amp draw is more like an 8 hour rate I'd guess really only about 35 AH. If that's the case your battery will be dead in 6 hours. Probably won't start after 3 or 4.
However, no one, including me, knows what battery you have. If it's a diesel with 2 batteries you would fair a little better.

way2roll

Wilmington NC

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Posted: 08/16/20 07:34am Link  |  Quote  |  Print  |  Notify Moderator

Does the cooler constantly draw current or only to maintain a certain temperature?


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RoyB

King George, VA

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Posted: 08/16/20 07:43am Link  |  Quote  |  Print  |  Notify Moderator

All of my camping trips are based on PLAN Bs....

If I was to use my Truck Start Battery like having a 12V COOLER connected and run down the battery I would then start up my 2KW Honda EU2000i generator that is sitting secured and covered in the tailgate corner of my truck bed. Then I would hook up my portable BATTERY CHARGER and charge up up my truck start battery to start my truck.

My battery situation however is geared for camping off grid and consist of two groups of two 6VDC Batteries in series and has a great long term use when camping off-grid... What you are describing would never be a problem for us camping off grid...

[image]
This was my original BATTERY BANK setup using three each 12VDC Batteries in parallel... This has recently been replaced with a new 12V battery bank that consists of two groups of two 6VDC Batteries in series.

[image]
The new battery bank is installed in this battery box that has a slide off top lid. This is sitting on the trailer tongue area replacing the three 12V Batteries originally used... This battery box extends out on both sides of the tongue area and fits perfect inside the the two welded on mounting rails. I also have a second 10WATT Solar panel so that each 12V groups will have a trickle charge using the two 10 WATT small solar panels when sitting in the high sun..

This is my 2KW Generator sitting inside my covered truck bed.. This is pulled out onto the dropped tailgate when being used... ALways having the generator mounted in my truck has been used many many times getting someone else truck's started. Also being secured in my covered and locked truck bed my generator goes where I go..
[image]

Its all about PLAN Bs hehe...

Roy Ken
[image]

2oldman

NM

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Posted: 08/16/20 08:36am Link  |  Quote  |  Print  |  Notify Moderator

Carry jumper cables.

CFerguson

on the road

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Posted: 08/16/20 08:54am Link  |  Quote  |  Print  |  Notify Moderator

2oldman wrote:

Carry jumper cables.

Yep. Especially since you arent Certain.

midnightsadie

ohio

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Posted: 08/16/20 09:00am Link  |  Quote  |  Print  |  Notify Moderator

I have one , I put a marine battery in the trunk ran a line with cig plug to the back seat ,never had a problem. its only drawing power when the compressor runs which ain,t often.

theoldwizard1

SE MI

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Posted: 08/16/20 02:32pm Link  |  Quote  |  Print  |  Notify Moderator

agwill wrote:

You should be fine for about 4 hours of run time and still start your vehicle. Take a chance and live life on the edge.

Maybe you like living on the edge, but I would not go longer than 3 hours. 2 if you are super cautious type.

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