[NSRCA-discussion] Electrics

[Earl Haury]

The more relevant spec on (deep cycle) lead acid batteries is the reserve capacity (RC) and is expressed in minutes (defined as minutes @ 25A to 10.5v). As a pair of Astros will draw about 20A @ 12v (240W) the RC pretty much indicates the useful charge time.

Earl
  ----- Original Message ----- 
  From: Bob Richards 
  To: NSRCA Mailing List 
  Sent: Tuesday, April 18, 2006 8:29 AM
  Subject: Re: [NSRCA-discussion] Electrics


  Dave,

  All the literature I have seen for rating the amp-hour capacity of lead-acid batteries use a 20 hour discharge rate. So, in your case, that would be about 5 amps. Obviously, if you draw more than 5 amps, you will not get the rated capacity.

  Bob R.


  David Lockhart <DaveL322 at comcast.net> wrote:
    FWIW - I've been using a Sears Marine part #27582 lead acid battery as a power source at the field.  Weight is about 65 pounds.  Rated capacity is 108 amps (can't remember what discharge rate was used to yield that capacity).


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