Nov 01, 2020 7:54 pm
I am looking for some advice on switching my house build to all electric.
We are a few weeks away from selections so I think the option is still open to us.
Currently in the plan is instantaneous gas hot water service and a gas stove top.
Our house is going to have 6.5kw of North West facing solar panels so I was thinking that we could cut out completely the requirement of gas supply if we switched the 2 appliances to electric.
In theory I would like to get a 270l Chromogen hot water heat pump and use our solar panels to heat the water during the optimum period in the afternoon. My concerns are how effective these pumps are? I know there are some climate limitations and I would like to know will the tank be able to keep the water hot throughout the night without drawing electricity from the grid?
I am aware that this route will be a few thousand dollars more upfront but I'm ok with that over the long run.
If anyone has gone down a similar route I am interested in hearing your experience and thoughts.
Thanks for reading
Re: Building an all electric house north of Adelaide2
Nov 01, 2020 8:15 pm
May 2019 we went all electric in our existing house.
We have a Sanden heat pump with a 250L tank (which is a bit big for the two of us).
The heat pump runs for 2 hours every afternoon between 1.00 pm and 3.00 pm every afternoon. . . . so we are only using the solar panel power most days.
The water is always very hot for my morning shower.
The other change we made was to install a Induction cook top, which I love . . . . much better than gas and super easy to keep clean.
NB I probably do around +70% of the cooking as my wife still works, so I am qualified to have an opinion on the cooktop.
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Re: Building an all electric house north of Adelaide5
Oct 25, 2021 1:26 pm
Solar seems to make sense only if you have an extensive electricity bill so it can reduce it. With the way how it seems to go now, they may start charging for the peak electricity owners sell to the grid. Unless there are plans for a battery, ensure that your electricity usage/bill in the peak sunny hours is requiring a reduction.
Re: Building an all electric house north of Adelaide6
Oct 25, 2021 7:20 pm
I've gone with a Sanden as above for hotwater, induction for cooking and r/c for heating cooling. Mine hot water is allowed to heat from 10:30am to 4:00pm and also no issues with water temp by the next morning. It actually only seems to run for about 2 hours normally and seems to only use about 2kw per day. Single person household though so the 300L tank is a bit of an overkill (though I only asked for a 250L and the builder installed the wrong one).
Building an all electric house north of Adelaide7
Oct 26, 2021 8:30 pm
We have 9kw solar and just use normal storage hws, it has a 2.4kw element retrofitted, so draws 10A on a timer 9:30-4pm, 4 people in house. Cylinder is 25yrs old. This was our power use on a typical sunny day in winter. This week we have averaged 80% independence. No way I would put gas in a new house. I’ve lived in a house with instant 3 phase electric and instant gas hws, both sucked with frequent d*dgy showers as the systems try to match the flow. You often need to open the hot tap more to cool the shower etc…
Re: Building an all electric house north of Adelaide8
Oct 27, 2021 1:00 am
All electric household is the way to go, Heat pump HWU's are one of the most efficient types. I went with the Stiebel Eltron 302L unit, very happy with it so far (March 2019 Install). Currently uses 600w for around 3-4hrs per day in a two person household. The Sanden's also have good reviews but its high cost & split design can be an issue.
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