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3239 posts

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  Reply # 1496838 22-Feb-2016 09:53
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Dairyxox:

 

Its not really for running gutsy appliances, the real benefits come from being able to sell back the power at peak rates, instead of just when its sunny.

 

 

 

 

@8-10c/unit, this thing will never break even.....


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Master Geek
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  Reply # 1496839 22-Feb-2016 10:03
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Great, the more competition the better. I'm seriously looking the Enphase battery that is about to be launched. 

 

https://enphase.com/en-au

 

Time shifting is too disruptive to family life. A small amount of storage seams to makes sense. 

 

 


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  Reply # 1497539 23-Feb-2016 08:25
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dwl

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  Reply # 1497546 23-Feb-2016 08:41
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I didn't spot any mention of network connectivity. Hopefully something will be available, ideally reporting on a per cell basis, and not just a 5 digit LED.

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  Reply # 1497560 23-Feb-2016 09:10
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Jaxson:

 

The buy back rate is wholesale, so any system that revolves around that intention is quite flawed.  Maybe earlier on when you were paid closer to your retail cost, but the power companies soon shut that down.

Better approach in my opinion is to go direct online solar (no batteries) and aim to cover your monthly line charge only via selling back power, and schedule your power loads to the middle of the day.  Simple timers on your DHW for example will ensure this is only heating during the day, and delay start timers on dish washers and washing machines should push these into the self generation part of the day, after you've left for work.

 

 

 

Batteries can be added to this type of system at a later date, but direct online is a good low maintenance and cheaper place to start to get your feet wet.

 

 

I agree with your comments, if the power companies are only paying 7 to 10 cents per unit and the local lines company charges a small fee on every unit exported, then I want to use as much of my generated power as I can and buy less imported at retail plus GST.

 

Even if the stored power only runs small appliances and chargers it will benefit "my power company", and not theirs.  I installed 5kW solar PV at the same time one of the power companies was being part sold off, so I consider the solar install as investment in "my power company".

 

I will wait and see how much it will cost to add storage and what sort of return on investment there is.  It may be better to upgrade my hot water heating with a heat pump, or buy a more efficient car.  For example I've switched to getting around on a cheap electric bike.  





:)


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  Reply # 1497709 23-Feb-2016 11:37
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Interesting. I am still waiting for my Tesla Power Wall + Solar to be installed. When it happens - the Analytics will start.


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  Reply # 1509825 9-Mar-2016 12:52
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Hi I had a conversation with sales at Solarcity about the Panasonic battery. The 8kW battery with 2kW output, and 1kW emergency supply is normally sized for a 3kW solar install.  10 year warranty.  Install cost is around $12000.

 

I will keep an eye on developments, in the technology battery sizes and costs in future, but does not look cost effective for me at present. 





:)


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  Reply # 1509849 9-Mar-2016 13:41
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kotuku4:

 

Hi I had a conversation with sales at Solarcity about the Panasonic battery. The 8kW battery with 2kW output, and 1kW emergency supply is normally sized for a 3kW solar install.  10 year warranty.  Install cost is around $12000.

 

I will keep an eye on developments, in the technology battery sizes and costs in future, but does not look cost effective for me at present. 

 

 

12K for an 8KWh battery!!!!, there must be a typo in their somewhere, or they are just taking the p###.

 

 

 

 


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  Reply # 1509918 9-Mar-2016 14:51
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kotuku4:

 

Hi I had a conversation with sales at Solarcity about the Panasonic battery. The 8kW battery with 2kW output, and 1kW emergency supply is normally sized for a 3kW solar install.  10 year warranty.  Install cost is around $12000.

 

I will keep an eye on developments, in the technology battery sizes and costs in future, but does not look cost effective for me at present. 

 

 

Japanese techs has introduced a while ago solution (add-on box) to use your EV (e.g. Leaf) as a power bank. With 3 times more capacity in the Nissan Leaf HV Li battery - that solution looks way better - you have a car you can drive and it is your power bank when you need it. When I have both Tesla Power Wall and Virtual Leaf assembled in my Lab - I may look at analysing the practicability of that solution as well.

 

Unaware of anyone bringing those interface boxes for EVs from Japan yet.


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Master Geek
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  Reply # 1511785 12-Mar-2016 10:22
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I'm much more interested in Redflow Zinc-Bromide batteries than lithium-ion for home use.


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Ultimate Geek
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  Reply # 1512723 14-Mar-2016 09:10
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1/2 the density and bromine? Atleast a Li will just start a fire and maybe kill you. Damage a ZB batt and you'll be over the exposure limit of 0.3ppm pretty quickly!





Most problems are the result of previous solutions...

All comment's I make are my own personal opinion and do not in any way, shape or form reflect the views of current or former employers unless specifically stated 

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Master Geek
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  Reply # 1513078 14-Mar-2016 14:50
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The Solarcity sales person suggested switch of power supplier, they are linked up with Ecotricity.  I'm with Meridian, the solar buy back rate and daily charges are ok but the supply rate is pretty high.  Ecotricity are not available in my area yet, has anyone used them?





:)


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