<div>On this area of Northern New York i have not had over .30 KWH(300 watts)per day over the last week.... and thats the high day, most have been .10 or none, none being the most common. Thats off a 1400 watt rack of SW panels</div>
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<div>Up here you size in a generator or go south for the winter. </div>
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<div>Tell me again why i live here, any thoughts Roy? You can't be doing any better....</div>
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<div>Bob<br><br></div>
<div class="gmail_quote">On Thu, Dec 10, 2009 at 9:29 AM, Darryl Thayer <span dir="ltr"><<a href="mailto:daryl_solar@yahoo.com">daryl_solar@yahoo.com</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">The system is way short on PV, and I would think that it is already a Gen with PV support. I agree with everybody more PV is the way to go but the batteries must be cooked by now with this many Deep cycles. BTW C/10 is not important, in fact I feel better if I charge slower. I know fast charging is a good way to kill batteries. Operating cost needs a high efficiency engine. So until you can get the PV up to become the dominant source, a gen is probibly in order. I tend to use smaller generators than most people, and the fuel efficency of a Honda inverter gen is hard to beat.<br>
<br>--- On Thu, 12/3/09, <a href="mailto:Windsun@wind-sun.com">Windsun@wind-sun.com</a> <<a href="mailto:windsun@wind-sun.com">windsun@wind-sun.com</a>> wrote:<br><br>> From: <a href="mailto:Windsun@wind-sun.com">Windsun@wind-sun.com</a> <<a href="mailto:windsun@wind-sun.com">windsun@wind-sun.com</a>><br>
<div class="im">> Subject: Re: [RE-wrenches] Off-Grid Sizing Case<br></div>> To: "RE-wrenches" <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>> Date: Thursday, December 3, 2009, 12:18 PM<br>
><br>> Off-Grid Sizing Case<br>
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<div class="h5">><br>><br>><br>><br>><br>> The rate of charging is not the<br>> real problem in most<br>> undersized systems, it is the fact that the batteries<br>> seldom, if ever, get fully<br>
> charged. Given the ratio of PV vs battery capacity, I would<br>> suspect that their<br>> batteries have been chronically undercharged for ages. We<br>> usually recommend<br>> around 1 watt of pvper AH for a 12 volt system, 2<br>
> watts for 24 volt<br>> etc.<br>> <br>> A generator is not usually the<br>> answer, because it may<br>> have to run for hours to get that final 5-15% of charge<br>> into the batteries.<br>> Generators are good for equalizing, not so much for general<br>
><br>> charging.<br>> <br>> ..................................................................................................<br>> Northern<br>> Arizona Wind & Sun - Electricity From The Sun Since<br>
> 1979<br>> Solar Discussion<br>> Forum: <a href="http://www.wind-sun.com/ForumVB/" target="_blank">http://www.wind-sun.com/ForumVB/</a><br>> ..................................................................................................<br>
><br>> ----- Original Message<br>> -----<br>> From:<br>> Mark<br>> Frye<br>> To: 'RE-wrenches'<br>><br>> Sent: Thursday,<br>> December 03, 2009 10:56<br>> AM<br>> Subject: Re:<br>
> [RE-wrenches] Off-Grid<br>> Sizing Case<br>><br>><br>> So being able to achieve C10<br>> charging from the PV is not so<br>> important?<br>><br>> Mark<br>> Frye<br>> Berkeley Solar<br>
> Electric<br>> Systems<br>> 303 Redbud<br>> Way<br>> Nevada<br>> City, CA 95959<br>> (530) 401-8024<br>> <a href="http://www.berkeleysolar.com/" target="_blank">www.berkeleysolar.com</a><br>
> <br>><br>><br>><br>> From: <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a><br>><br>> [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>] On<br>
> Behalf Of <a href="mailto:Windsun@wind-sun.com">Windsun@wind-sun.com</a><br>> Sent:<br>> Thursday, December 03, 2009 9:51 AM<br>> To:<br>> RE-wrenches<br>> Subject: Re: [RE-wrenches] Off-Grid Sizing<br>
> Case<br>><br>><br>><br>> I would go with #1.<br>> The solar is obviously<br>> undersized for the battery bank he has. Another panel +<br>> MPPT should give him<br>> about 25-40% more, depending on temps etc.<br>
> <br>><br>> ..................................................................................................<br>> Northern<br>> Arizona Wind & Sun - Electricity From The Sun Since<br>> 1979<br>
> Solar<br>> Discussion Forum: <a href="http://www.wind-sun.com/ForumVB/" target="_blank">http://www.wind-sun.com/ForumVB/</a><br>> ..................................................................................................<br>
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