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Date:         Wed, 21 Apr 2010 18:25:54 -0700
Reply-To:     "Mike \"Rocket J Squirrel\"" <camping.elliott@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         "Mike \"Rocket J Squirrel\"" <camping.elliott@GMAIL.COM>
Subject:      Re: charging aux battery: too much of a good thing?
Comments: To: Phil Zimmerman <philzimm1@shaw.ca>
In-Reply-To:  <56e9387260e6471032cfea242881c876@shaw.ca>
Content-Type: text/plain; charset=UTF-8; format=flowed

On 4/21/2010 6:16 PM Phil Zimmerman wrote: > > On Apr 21, 2010, at 3:36 PM, Mike "Rocket J Squirrel" wrote: > >>> On Tue, 20 Apr 2010 15:11:51 -0700, mark drillock >>> <mdrillock@COX.NET> wrote: >>>> Today I was able to fire up my 3 battery system for the first time. A >>>> dedicated 125 amp hour deep cycle was added...... >>>> ....I don't know how it will be in practice. Anybody know? >>>> Suggestions? >>> ----------------- >>> Phil Z. ably typed: >>> Hi Mark, >>> Wow... now thats a dedicated aux battery for an Italian Gelato >>> Refer.... >>> ....Might be worth the time and effort to put a temperature probe on >>> the battery >>> to measure its temperature while Underway and Charging. See what the >>> temps are? >>> ----------------------- >> Mr Buddy Squirrel Mike Elliott typed: > >> Your top-shelf chargers have a temp probe you screw to a battery >> terminal so they can compensate for temperature. >> ---------- > Gads Mike, you been reading the same battery porn I have. > A temperature compensated Battery Charger. > I'd sell my Westie for one! > Wait... then I wouldn't need one.... Forget that Idea. They are in > the $4-500 range anyway. > > Anywho, I assumed Mark would have a Thermister/Thermocouple for his > VOM that he could hook-up to measure the temps > back at his new cool Auxiliary Battery next to that even cooler Ford > Four-Banger Zetec engine in the Stretch testmobile. > > Did a quick look for battery charging temperatures not to be > exceeded..... Optima says: 125 F. > Which, in my less than stellar recall, is about the average > engine-room temperature of an average Westy on an average day, > while running down an average highway. Slow down entering a City or > hit a Stoplight and the temperature spikes up big-time. > > Think this will be salient to Marks question. Did you install a DC to > DC Charger on your Rig to top-up your Aux Batteries?

I did. And I posted the details on the vanagonwiki. Which, alas, has been forever and ever lost.

-- Mike "Rocket J Squirrel" Elliott 84 Westfalia: Mellow Yellow ("The Electrical Banana") 74 Westrailia: (Ladybug Trailer company, San Juan Capistrano, Calif.) Bend, OR KG6RCR


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