Quote:
Originally Posted by xelasnave
I want a battery bank so I can buy power off peak and sell it back when the demand is high.
Alex
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Hi Alex,
The sell price/feed in rate (tarrif) is not that great (5 to 11.5c per kWh, with Victoria soon or already at 11.5c /kWh, post July 2017). I don't think that you can buy electricity that cheap unless you're Alcoa or the like. Also allowing for/amortizing the cost of your plant over its life will degrade
any meager buy/sell margin even further.
There was a time, when there were feed-in-tarrif inducements to go solar in the order of 66c /KWh !!!!! (I think in NSW, but also lesser amounts in other states??), however; at that time solar systems were nowhere near as inexpensive as what they are now. I think solar + batteries are a great idea for one's own power need. At current electricity pricing it makes far more sense to use one's own solar generated power,
first to run domestic needs,
second to charge one's own battery bank and
lastly to feed any excess back in to the grid. Doing so will reduce system energy losses and reduce net cost.
It's also beneficial to ,
where possible, reorganise the daily load so that it more closely matches the solar system's contemporaneous electrical energy production, i.e: reorganise to more closely use the electrical energy as it's produced, rather than charge any batteries or sell back any electricity.
Best
JA