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Greenpower and old electrical hot water

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12:56 am
August 18, 2009



posts 456

If I'm already paying for greenpower, does it really matter if I don't
replace my electric hot water system until it breaks down?

12:58 am
August 18, 2009



Post edited 5:59 am – August 18, 2009 by Marg

Two issues:  

most of our green power comes from wind.  I met someone from CSIRO the other day who said that because wind is so unpredictable, the NEM people don't really work it into their production planning.  Until we have good storage and/or a smart grid with smart appliances (or grid connect car batteries) this could limit the usefulness of wind power. Better to just use as little as possible power, then make it green.  

Secondly, if you leave it till your existing hotwater breaks down, it might be weeks before you can get your solar hot water installed.  Better to plan that investment ahead.

I've had some positive experience with instantaneous electric – so if you have a need for some but not much hot water that can be a pretty efficient way to go.

2:24 am
August 18, 2009



posts 456

Thanks for the suggestion about the instantaneous electric. I'm thinking of going down that track, and it was also the conclusion of the Home Energy Advice Team when I spoke to them about it (I have too much shaded roof on the north side to make solar hot water worthwhile). 

The only problem is I need hot water at two ends of the house. I know you can buy a recirculating pump that gets the hot water where you need it before you turn on the tap, but I worked out it would cost almost as much as buying two instantaneous hot water systems. But if I install two hot water systems, they have to run a gas pipe under the length of the house from the gas meter – not sure I'm keen on that. So maybe I'll start with one instantaneous hot water system and see how it goes.

7:56 pm
February 18, 2013



posts 263

If you are paying for Green Power then you can use as much electricity as you want and still have a zero carbon electricity footprint . Full stop.

Of course the argument is that we need to reduce our energy use because every bit of extra electricity demand drives the need for more power station capacity and infrastructure.

Seriously though, electricity is only a small part of our ecological footprint. Consumption is what chews through the biggest amount of land and resources. Those of us wanting to be 'green' need to try to really minimise our purchasing. Cut electricity too, of course. Heating and cooling is 80% of electricity use in homes in Canberra. Each degree adds or decreases 10% so adjust your thermostat and minimise your use.

But seriously, the big problem in Australia is our coal exports and the Federal Government is just in the process of approving another four massive mines!! We have got to really think about where we sit with all this! I mean the government making us feel guilty about our energy use is completely hypocritical. We really need to stop beating ourselves up and look at what can be done to change the big picture! 


11:45 am
February 19, 2013



posts 456

Yes, with regard to the coal mines, I think the international market for coal will change very rapidly with the accelerating fall in the cost of renewables.

In my view, we are seeing a massive shift that will quickly make coal fired power a poor investment. For example, China is developing carbon emission trading schemes in different provinces that no doubt will eventually go national, and they are facing so many pollution problems in their cities, there will be a lot of domestic pressure to reduce pollution from fossil fuel emissions.


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