tegwin
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| posted on 7/4/10 at 01:49 PM |
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Deep Cycle battery in engine bay?
Anyone know much about 12V batteries?
I am in the process of adding a 12V 120Ah leisure battery to my sisters van to power her lights etc...
Although most people mount them under the seats in the cab, there are a few who have put them in the engine bay on a special mount...
Is there any issues particularly with mounting a deep cycle battery so close to the engine?... If it was in the cab the hottest it would get is about
35C... in the engine bay it could get closer to 80....
How would that effect the life etc?
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Would the last person who leaves the country please switch off the lights and close the door!
www.verticalhorizonsmedia.tv
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ashg
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| posted on 7/4/10 at 02:07 PM |
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if its an optima battery you can put them anywhere. i have got an optima yellow top on the roadster, the plan is that if the engine dies i can drive
it home on the starter motor lol.
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
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tegwin
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| posted on 7/4/10 at 02:12 PM |
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Christ... optima batteries are expensive..
I was looking at more "conventional" batteries... 120ah would cost about £90...
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Would the last person who leaves the country please switch off the lights and close the door!
www.verticalhorizonsmedia.tv
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Bluemoon
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| posted on 7/4/10 at 02:30 PM |
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They are heavy, so would need a good mount so in accident/hard breaking they stay put. Not sure about temperature, but the car battery works just fine
and they are the same construction (all be it diffrent lead "plates" ) you might just have to top it up with distilled water more
often..
Dan
[Edited on 7/4/10 by Bluemoon]
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britishtrident
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| posted on 7/4/10 at 02:41 PM |
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From "The Battery University" website"
"Batteries function best at room temperature. Operating batteries at an elevated temperature dramatically shortens their life. Although a
lead-acid battery may deliver the highest capacity at temperatures above 30°C (86°F), prolonged use under such conditions decreases the life of the
battery. Similarly, a lithium-ion performs better at high temperatures. Elevated temperatures temporarily counteract the battery's internal
resistance, which may have advanced as a result of aging. The energy gain is short-lived because elevated temperature promotes aging by further
increasing the internal resistance."
Above applies even to an "Optma" gel style battery.
Apart from the above one obvious problem on a lead acid battery is increased rate of loss of electrolyte -- even on a semi-sealed battery.
Might not matter too much as a budget deep cycle battery has a life expectancy of two seasons, three at most.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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