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<p dir="ltr">Sorry about the confusion between Nick Pine and Nick Pyner.</p>
<p dir="ltr">As far as hot water tank storage ... My idea is to focus on getting<br>
My hot water energy to net zero first. I will add panels and other <br>
Modifications until I do get it right. I follow the "divide and conquer" testing rule. The water meter and KWh meter is great idea to know<br>
Exactly what is going on. This property is in Charlotte, NC area and water / electric rates are unsustainable. Off grid ("the system") is the priority!<br>
</p>
<div class="quote">On Apr 23, 2016 10:01 PM, Nick Pyner <npyner@ihug.com.au> wrote:<br type="attribution">
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<p>I wondered that too, particularly as I believe Nick Pine has been spruiking a hell of a lot of numbers lately, but he clearly quoted me at the bottom of his post.<br>
</p>
Nick Pyner<br>
<br>
Dee Why Beach NSW<br>
<br>
<div class="x_moz-cite-prefix">On 24/04/2016 2:57 AM, Stephen wrote:<br>
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<p class="x_MsoNormal"><span style="">I think he was referring to Nick Pine!</span></p>
<p class="x_MsoNormal"><span style=""> </span></p>
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<p class="x_MsoNormal" style="margin-left:.5in"><b><span style="">From:</span></b><span style=""> Greenbuilding [<a class="x_moz-txt-link-freetext" href="mailto:greenbuilding-bounces@lists.bioenergylists.org">mailto:greenbuilding-bounces@lists.bioenergylists.org</a>]
<b>On Behalf Of </b>Nick Pyner<br>
<b>Sent:</b> Saturday, April 23, 2016 12:43 PM<br>
<b>To:</b> <a class="x_moz-txt-link-abbreviated" href="mailto:greenbuilding@lists.bioenergylists.org">
greenbuilding@lists.bioenergylists.org</a><br>
<b>Subject:</b> Re: [Greenbuilding] Heat pump HWS</span></p>
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<p style="margin-left:.5in">Hi Bob</p>
<p style="margin-left:.5in">There is nothing particularly detailed about my figures and there is not much in the way of calculation! It is all simply an extension of about fifteen years of work with grey water heat exchangers. I have a standard Rheem electric
storage heater with its own exclusive kWh and water meters. The heat exchanger works with a Maddalena heat meter which gives a daily output in kWh and total water flow. The testing arrangement is not ideal but I do know
<u>exactly</u> what is going on!</p>
<p style="margin-left:.5in">I think it is a big mistake to try to plan for "just enough panels" for your HWS. You are bound to get it wrong, and your wife will be far from impressed.</p>
<p style="margin-left:.5in">The reason why I am looking at 3kW of panels is because that is all that will fit in a single group on a north-facing roof. That's real planning for you - architecture and environment, not numbers.
</p>
<p style="margin-left:.5in">The 3kW means I only need about 1.5 hrs of peak power equivalent, so I can be reasonably confident of getting that regularly, particularly as the roof is pretty ideally pitched at 45 degrees. It was actually built to take a (gasp!)
solar thermal HWS, but that never happened. For all that, I don't think the HWS is so important since, if it was not on solar, it would be getting power off-peak after 10pm. Far more important is the stuff that has unavoidable daytime demand - the fridge,
the stove, and winter space heating. If you want to do some serious planning, that is the place to look. All I have done there is confirm that the energy label on the back of the fridge was correct on an annual basis, and all that really meant was that getting
a new one is not such a high priority. Your power bills should tell you all you need to know.</p>
<p style="margin-left:.5in">Nick Pyner</p>
<p style="margin-left:.5in">Dee Why Beach NSW</p>
<p style="margin-left:.5in"> </p>
<p style="margin-left:.5in"> </p>
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<p class="x_MsoNormal" style="margin-left:.5in"><span style="">On 23/04/2016 11:48 PM, Jake jakaitis wrote:</span></p>
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<p style="margin-left:.5in">Helpful to understand how you arrived at these numbers?</p>
<p style="margin-left:.5in">I am interested in starting out my PV system with just enough panels to power my new energy efficient whirlpool hot water tank. T</p>
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