For the electrical experts
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Mountain Pass
Joined: Dec 2010
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For the electrical experts
any help from the electrical experts highly appreciated
F350 6.0 with 2 ea Sears Platinum group 65 batteries 930 cranking amp each Batteries. Relatively new.
I am looking to install 6 ea 12V fans to move air over and cool the dogs that I carry in the truck while standing with engine off.
The fans I would like to use draw 3 amps each x 6 fans = 18 Amps.
How many hours can I run these fans and still expect to have sufficient reserve to crank the truck.
I can get lower amp draw fans but they obviouslly move less air CFM.
Mark
F350 6.0 with 2 ea Sears Platinum group 65 batteries 930 cranking amp each Batteries. Relatively new.
I am looking to install 6 ea 12V fans to move air over and cool the dogs that I carry in the truck while standing with engine off.
The fans I would like to use draw 3 amps each x 6 fans = 18 Amps.
How many hours can I run these fans and still expect to have sufficient reserve to crank the truck.
I can get lower amp draw fans but they obviouslly move less air CFM.
Mark
Fleet Owner
Joined: Nov 2003
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Your batteries are probably 500 amp-hour batteries (cranking amps really don't mean anything in this case). Divide the amp-hours by the amps and you will get the MAXIMUM length of time. I wouldn't want to run the bateries down by more than 25% personally though. The calculation (250 divided by 18) says you can run the fan for 13 + hours. I would be also wondering how quickly and how completely can your alternator get the batteries re-charged.
Posting Guru
Joined: Oct 2006
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From: Francestown, NH
I've seen a carpenter with a regular home type window air conditioner that he has rigged to fit in one of the rear windows of his crew cab.
He runs a cord off the site generator or household power.
He has a dog in the back too. Never seen him drive with it though.
He runs a cord off the site generator or household power.
He has a dog in the back too. Never seen him drive with it though.
Lead Driver
Joined: Feb 2011
Posts: 8,241
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From: L.A. (Lower Alabama)
I would look in to using a deep cycle battery dedicated to the fans connected to the vehicle through a "battery isolator" commonly used on RV's. May still need an alternator upgrade also. Fans should run a long time- you could time it to be sure how long. Cool dogs ain't gonna help if the truck won't crank. 
Junior User
Joined: May 2011
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I would look in to using a deep cycle battery dedicated to the fans connected to the vehicle through a "battery isolator" commonly used on RV's. May still need an alternator upgrade also. Fans should run a long time- you could time it to be sure how long. Cool dogs ain't gonna help if the truck won't crank.
Be careful with those pups, dogs do not sweat like we humans so the cooling we feel from a fan is not what a dog gets.
Fleet Mechanic
Joined: Jan 2007
Posts: 1,708
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From: Circle City
The Best advice I can offer is to have the dogs wait for you in your running truck while the truck's A/C is on high if you have to leave them in an unoccupied vehicle. This way you will be more in tune to the amount of time they are waiting, sometimes we get distracted and allow too much time to pass.
My friend left his beloved dog in the car while unloading groceries, got distracted only to find his K9 friend had passed in a superheated cabin.
Sometimes the easiest thing to do is to plan ahead and make other arrangements for your dogs than having them wait in an unoccupied truck for a prolonged period of time.
it's not worth ones dog's life being at risk.
(member I.B.E.W. )
My friend left his beloved dog in the car while unloading groceries, got distracted only to find his K9 friend had passed in a superheated cabin.
Sometimes the easiest thing to do is to plan ahead and make other arrangements for your dogs than having them wait in an unoccupied truck for a prolonged period of time.
it's not worth ones dog's life being at risk.
(member I.B.E.W. )
Fleet Owner
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Just got done w/ this mod!
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Mountain Pass
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I dont know if you can see in my avatar but this is a professional custom built insulated animal transport vehicle with full ventilation.
Just looking to make a couple of Mods / improvements.
Bismic many thanks for your reply. This is exactly what I was looking for
Mark
Just looking to make a couple of Mods / improvements.
Bismic many thanks for your reply. This is exactly what I was looking for
Mark
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From: Medina, TX
I have a three hole dog box in my truck with two fans. Not sure how long they would run, but I have left them them on for an hour or two before without significant drain. I usually throw a bag of ice in the box if I have dogs in on a hot Texas day.
Fleet Owner
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2000W inverter soon to be purchased (borrowing a 1000W unit for now). Plan to run 110V tools out in the brush at the deer lease. Also good to have when camping w/ the travel trailer.
One of the big things I "almost" look forward to is changing a tire (from mesquite thorn damage) out in the middle of nowhere w/ my 110v impact wrench! Cordless ones are expensive and the batteries just don't seem to last in a hot truck. 12V impacts are all "cheezy" IMO.
One of the big things I "almost" look forward to is changing a tire (from mesquite thorn damage) out in the middle of nowhere w/ my 110v impact wrench! Cordless ones are expensive and the batteries just don't seem to last in a hot truck. 12V impacts are all "cheezy" IMO.
Post Fiend
Joined: Oct 2009
Posts: 12,123
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From: N. Fort Worth, tx
I would look in to using a deep cycle battery dedicated to the fans connected to the vehicle through a "battery isolator" commonly used on RV's. May still need an alternator upgrade also. Fans should run a long time- you could time it to be sure how long. Cool dogs ain't gonna help if the truck won't crank.
Post Fiend
Joined: Oct 2009
Posts: 12,123
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From: N. Fort Worth, tx
mark I have a 14v 3/8 that is 150ftlb. they make a 24v 1/2 thats a beast. not cheep iirc $500 or so.