Date: Sun, 7 Jul 2013 18:13:58 -0400
Reply-To: phishman068@GMAIL.COM
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Craig Cowan <phishman068@GMAIL.COM>
Subject: Re: Vitrifrigo temp data
In-Reply-To: <FA7EE82BC4E24292BF807A4E94EB4660@troya3a1e48888>
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Wait until the sun comes out and your interior temps get around/above 90*.
You won't be seeing 3 days of running on a 125ah battery and no solar....
I barely do with 225ah and 80watts of solar when the heat is up.
-craig
On Jul 7, 2013, at 5:56 PM, Troy <colorworks@GCI.NET> wrote:
> David:
>
> The meter also reads out in watt hours, and a few other things as well. For
> anyone interested in the watt hours, it's reading 275 Wh's. over almost 24
> hrs at this point. I guess that amp hours is something I understand a little
> bit better, as the battery is listed in amp hr capacity. The deep cycle
> marine battery I have for example is a 125 amp hour battery. Using 20 amp
> hours of that is something that I can relate to. I don't know how many watt
> hours the 125 amp hour battery contains, and I guess that depends on voltage
> according to your description. Knowing that my 125 amp hour battery is
> capable of delivering about 65 or so AH's,(50% battery depletion) I know I
> can run my fridge for about three days before the battery needs charged, and
> that's the most useful information for me. I realize this is a very
> simplistic approach, and other variables apply, but I think it's good enough
> for general calculations. Do you agree? Fridge is now at 26°, so guess I
> need to change the settings. Amazing little unit I must say...
>
> Troy
>
>
> From: "David Beierl" <dbeierl@attglobal.net>
> To: "Troy" <colorworks@GCI.NET>
> Cc: <vanagon@GERRY.VANAGON.COM>
> Sent: Sunday, July 07, 2013 1:14 PM
> Subject: Re: Vitrifrigo temp data
>
>
>> At 04:37 PM 7/7/2013, Troy wrote:
>>> I'm not sure if anyone else has plotted the electrical usage, but on my
>>> "watts up" meter it appears I've used almost 20 amp hours in 21 hrs, so
>>> about one amp per hr, which I thought was actually pretty amazing. This is
>>> the first
>>
>> Just being pedantic here...that's one *amp-hour *per hour, or an average
>> of one amp consumption. Amperes is a rate of charge transfer (coulombs
>> per second), ampere hours is an amount of charge (one amp hour would be
>> 3600 coulombs, or the amount of charge in about 240 average-size lightning
>> bolts (or ten really humongous ones)).
>>
>> To get the most accurate picture of consumption you have to go one step
>> farther and look at watt-hours, if your meter will do that. An amp-hour
>> at ten volts has ten times the energy of an amp-hour at one volt;
>> watt-hours takes voltage into account and gives energy directly.
>>
>> Yours,
>> David
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