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<p>I am in the process of installing 3kW of PV which will inter
alia be connected to a fairly new electric storage heater. I can
hardly claim it to be my own idea, but it is my own money. The
heater takes 4.6kWh/day of electricity @ about 10c/kWh off the
grid, which is about 65% of the total demand, the rest coming from
a grey water heat exchanger.<br>
</p>
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<div class="moz-cite-prefix">On 23/04/2016 1:51 PM, Antonioli Dan
wrote:<br>
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<div>So where are the numbers?</div>
<div><br>
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<div>Are you willing to invest in your own ideas, spend your own
money? Report back?</div>
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<div>On Apr 22, 2016, at 8:45 PM, Nick Pyner <<a
moz-do-not-send="true" href="mailto:npyner@ihug.com.au"><a class="moz-txt-link-abbreviated" href="mailto:npyner@ihug.com.au">npyner@ihug.com.au</a></a>>
wrote:</div>
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<p>Ah, now that IS interesting. Because the NSW
certification rated heatpump highly, I assumed the
testing was all done. I'm sure this is true from a simple
energy standpoint, a COP is a COP, but that is all the
energy certification is interested in, and it doesn't
reflect the bigger picture. The controversy I alluded to
has been brewing for some time and it all hit the fan with
with the release of a Regulatory Impact Statement in 2013.</p>
<p><a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.energyrating.gov.au/document/consultation-regulation-impact-statement-heat-pump-water-heaters">http://www.energyrating.gov.au/document/consultation-regulation-impact-statement-heat-pump-water-heaters</a></p>
<p>and background</p>
<p><a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://yourenergysavings.gov.au/energy/hot-water/heat-pump-hot-water">http://yourenergysavings.gov.au/energy/hot-water/heat-pump-hot-water</a></p>
<p>The certification work I do is a minimum standard. I have
never needed to call for heat pump. If PV goes in, a
plain-vanilla storage heater more than suffices. I was
looking into heat pumps on a job but I found the
manufacturer excluded alpine areas over 1000m, and there's
me, you guessed it, working on a ski lodge at 1700m. I
subsequently found that Rheem make no such distinction and
claim(ed) their included resistance heater was unique. Not
true, Bosch have one too.</p>
<p>I can't see why you would ever programme a heat pump to
use electric only. It is only there for backup and should
not require human intervention.<br>
</p>
<p>The game seems pretty shambolic.</p>
<p>Nick Pyner</p>
<p>Dee Why Beach NSW<br>
</p>
<p> <br>
</p>
<p>On 23/04/2016 1:34 AM, Antonioli Dan wrote:<br>
</p>
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<div> I’m looking into hybrid models that allow you to
program the tanks to run on heat-pump only, electric
only, and both. </div>
<br>
<div>But with heat pumps now all the rage what I’m looking
for are solid numbers, not hypothetical calculations.<br>
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<br>
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<div>On Apr 21, 2016, at 9:32 PM, Nick Pyner <<a
moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:npyner@ihug.com.au"><a class="moz-txt-link-abbreviated" href="mailto:npyner@ihug.com.au">npyner@ihug.com.au</a></a>>
wrote:</div>
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<div bgcolor="#FFFFFF" text="#000000"> Indeed I have.
I was unsure about raising them because of climate
considerations, but the essential principle is the
same anyway.<br>
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