<div dir="ltr">oh... my mind just deadlocked on me when you said those directions... most have theirs south facing...<div><br></div><div>but yes there are 2 ways so far with off the shelf stuff</div><div><br></div><div>a heat pump</div><div>and a hot water cylinder with in built electric heater...</div><div><br></div><div>cant remember who on OEM that did a system much what you asked</div></div><div class="gmail_extra"><br><div class="gmail_quote">2014-09-07 19:20 GMT+02:00 Damon Hart-Davis <span dir="ltr"><<a href="mailto:dhd@exnet.com" target="_blank">dhd@exnet.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Only about 200W for my off-grid system; this thought is about grid-flow balancing and dynamic demand generally, not just my situation…<br>
<br>
Rgds<br>
<br>
Damon<br>
<br>
<br>
On 7 Sep 2014, at 15:48, Bo Herrmannsen <<a href="mailto:bo.herrmannsen@gmail.com">bo.herrmannsen@gmail.com</a>> wrote:<br>
<br>
> you say E and W facing... do you have any south facing?<br>
><br>
> Q: how much space is there in the AVG. uk house for such an install?<br>
><br>
><br>
> 2014-09-07 13:28 GMT+02:00 Damon Hart-Davis <<a href="mailto:dhd@exnet.com">dhd@exnet.com</a>>:<br>
> Hi,<br>
><br>
> This isn’t particularly about money (or indeed carbon yet), though given the ratio of export to retail tariffs it might pay off. And the generation component is paid just the same. And many people’s export is ‘deemed’ anyway.<br>
><br>
> This is about attempting to minimise grid flows to/from a house which has some virtues of its own, and looks trickier than I had expected given how fast power generation from PV varies from my own measurements.<br>
><br>
> Note that in our case because of our E- and W- facing PV we generate relatively little power in winter, but still probably only get to consume about 50% of it in house because of timing, and a resistive heating dump is probably the most robust thing to practice on!<br>
><br>
> Rgds<br>
><br>
> Damon<br>
><br>
><br>
> On 7 Sep 2014, at 12:21, John Stumbles <<a href="mailto:john@stumbles.org.uk">john@stumbles.org.uk</a>> wrote:<br>
><br>
> > On 07/09/14 12:00, Damon Hart-Davis wrote:<br>
> >> Hi,<br>
> >><br>
> >> I have a thought in the back of my mind about carefully making some<br>
> >> use of residual exported solar PV generation in winter with<br>
> >> highly-efficient storage heaters controllable by an extension of<br>
> >> OpenTRV to supplement a gas-fired system.<br>
> ><br>
> > Wouldn't you get more money selling PV 'leccy back to the grid than it would be worth to you as heat?<br>
> ><br>
> ><br>
> > --<br>
> > John Stumbles <a href="http://stumbles.org.uk" target="_blank">http://stumbles.org.uk</a><br>
> > :-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:-:<br>
> ><br>
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><br>
><br>
> --<br>
> |||||<br>
> @(~Ô^Ô~)@<br>
> -------------oOo---U---oOo-------------<br>
> | |<br>
> | Bo Herrmannsen |<br>
> | |<br>
> | |<br>
> | "blessed are the "cracked", |<br>
> | for its they who let in the light" |<br>
> | Ooo |<br>
> |_________________ooO____( )________|<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr"><pre><pre><span style="white-space:pre-wrap"> |||||
@(~Ô^Ô~)@
-------------oOo---U---oOo-------------
| |
| Bo Herrmannsen |
| |
| |
| "blessed are the "cracked", |
| for its they who let in the light" |
| Ooo |
|_________________ooO____( )________|
( ) ) /
\ ( (_/
\_)
</span></pre></pre><pre style="white-space:pre-wrap"><br></pre></div>
</div>