[Greenbuilding] Water heater timer energy savings?

[Antonioli Dan]

Nick, 

Have you thought of looking more closely into the difference between a solar thermal electric hot water system vs. a heat-pump solar electric system? Regardless of the cost of the installation, which system uses less energy to heat water?

Dan



On Apr 10, 2016, at 9:02 PM, Nick Pyner <npyner at ihug.com.au> wrote:

> 
> 
> On 11/04/2016 9:33 AM, Sacie Lambertson wrote:
>> 
>> A PV set-up that produces sufficient hot water you don't have to purchase the gas/electricity to heat water?
>> 
> 
>  I submit that has to be the way to go these days, and solar thermal is just passé, which I understand is reflected in Solarhart's share index.. The bigger the PV array you have, the cheaper it gets, and you can use electricity for all sorts of things, HWS included, while solar thermal just produces hot water and nothing else.  Further, once the solar thermal has done its job, it is simply taking up roof space that could be more gainfully employed producing electricity.  Now I don't know if you are in a position to benefit from any feed-in tariff for surplus electricity, but I bet you don't have any feed in tariff for hot water, and I also bet you won't be charging a battery with it either.
> 
> With PV, you can use a standard electric storage heater and plumbing, the heater doesn't know or care where the power comes from, and any wiring changes should be minimal.  Paying a plumber to go on a roof was never that good an idea and,  if you have electric storage HWS already, it would surely be madness now.  Another advantage of electric storage is that it can probably be painlessly replaced by a heat pump unit, which can significantly reduce the PV demand.  
> 
> There's some food for thought for you
> 
> Nick Pyner
> 
> Dee Why Beach   NSW
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