Re: [PSUBS-MAILIST] Batteries Bank

["Alan James" <alanjames@xtra.co.nz>]

Hi Ian,
Don't you mean 280 x 12 (hours) x $450- = $ 1,512,000
Alan
----- Original Message ----- 
From: "irox" <irox@ix.netcom.com>
To: <personal_submersibles@psubs.org>; <personal_submersibles@psubs.org>
Sent: Friday, October 01, 2010 8:32 PM
Subject: Re: [PSUBS-MAILIST] Batteries Bank


> That would be roughly 280 of these per hour of operation:
> http://store.wellingtongolfcars.com/ProductInfo.aspx?id=6282480
>
> Costing $21,000 and weighing 10400+kgs (for one hour of operation
> at 250KW).  This is just a rough estimate (not count discharge
> rate performance and system inefficiencies).
>
> Ian.
>
> -----Original Message-----
>
> From: Alan James 
>
> Sent: Sep 30, 2010 11:22 PM
>
> To: personal_submersibles@psubs.org
>
> Subject: Re: [PSUBS-MAILIST] Batteries Bank
>
>
>
>
>
>
>
>
>
>
> Hi Jon,
> That depends on how much money you want to 
> spend!
> Roughly you could have a 1/3rd the weight of a lead 
> acid battery if you went to
> Lithium, but the cost is many times more. If you 
> find what type of battery you want
> & go on the manufacturers site or a dealers 
> site they will have an amp hour rating
> wich is based on 20 hours use. There should be 
> specifications to help you calculate
> how many amp hours you'd get drawing over an 8 hour 
> period.
> Another factor coming in to the equation is " how 
> hard do you want to thrash your batteries?"
> If you drain them below half their capacity you 
> reduce their overall life expectancy.
> So say you had a 12 volt 100 amp hour battery & 
> you wanted to run it to 50% over 8 hours,
> you might get 40 amp hours & multiplying that 
> by 12 (volts) you get 480 watts.
> That means 520 x 12 volt 100 amp hour 
> batteries.
> That's about $250,000 worth of batteries however 
> you should be able to get a good discount.
> They weigh more than 30kg each so that's over 15 
> ton of batteries.
> Regards Alan
>
>
>  ----- Original Message ----- 
>  From: 
>  Firebolt 
>  
>  To: Psusbs 
>  Sent: Friday, October 01, 2010 6:33 
>  PM
>  Subject: [PSUBS-MAILIST] Batteries 
>  Bank
>  
>
>  Hello, this is a short question, 250 kw electric motor 
>  running  for 8 hours what type/many batteries do I need? ex. ampere Hour, 
>  voltage
>
>
>
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