what to do when the NSW $0.60 gross FiT expires Dec2016

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what to do when the NSW $0.60 gross FiT expires Dec2016

Postby petery1948 » Wed Mar 18, 2015 10:14 am

We are contemplating what to do when the generous gross FiT expires and only the grossly inadequate net FiT is available. More panels feeding to battery storage, with off-peak grid supply to charge the battery after a cloudy days looks like the way to go.

We would be interested in what others are planning, the type of storage to be used etc.
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Re: what to do when the NSW $0.60 gross FiT expires Dec2016

Postby Gordon-Loomberah » Wed Mar 18, 2015 10:32 am

Welcome to the Energy Matters Forums Petery1948 :)

With the price of Lithium batteries likely to drop significantly when Tesla introduces their home storage products, a lot of people will be considering either leaving the grid, or maintaining a connection for peace of mind and/or to avoid the use of a generator. However, some of us on the forum manage quite well with no grid connection and no generator use with quite modestly sized systems :)
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Re: what to do when the NSW $0.60 gross FiT expires Dec2016

Postby lantern » Fri Mar 20, 2015 10:01 am

For those of us who spent many years off the grid it will be very satisfying to tell the power distributors where they can stick their grid connection.
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Re: what to do when the NSW $0.60 gross FiT expires Dec2016

Postby davidg » Fri Mar 20, 2015 2:33 pm

Gordon-Loomberah wrote:Welcome to the Energy Matters Forums Petery1948 :)

With the price of Lithium batteries likely to drop significantly when Tesla introduces their home storage products

the only thing I hope is they do them in voltages that are useful to us and not the considerably higher voltage that are associated with car manufacturer use.
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Re: what to do when the NSW $0.60 gross FiT expires Dec2016

Postby Gordon-Loomberah » Fri Mar 20, 2015 4:00 pm

They recently announced that they will be producing batteries specifically for home storage, I'm expecting first info about them within a month or 2, and product available for purchase towards the end of the year, at least in the US, not sure how far behind Oz will be. Off-grid battery voltages in the US are generally the same as here, so they have no excuses for not getting it right!
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Re: what to do when the NSW $0.60 gross FiT expires Dec2016

Postby offgridQLD » Mon Mar 23, 2015 4:08 pm

Other than catering for the pre existing off grid systems and the typical 48v DC configuration. I don't see why they should let that hold them back. Why not build a higher voltage stationary storage system and combine it with the appropriate line of inverters.

Looking into the future high voltage DC has to be a good thing. Way less copper and most likely way more efficient DC/AC conversion in both the inverter and DC-DC conversion in the charge controller stage. I wouldn't expect Tesla to be supplying raw cells. My guess is they would be modula turn key solutions.

“We are trying to figure out what would be a cool stationary (battery) pack,” Musk said. “Some will be like the Model S pack: something flat, 5 inches off the wall, wall mounted, with a beautiful cover, an integrated bi-directional inverter, and plug and play.”

Though that was some time ago looks like they have somthing gong with solar city (another sister company they own) http://electrek.co/2013/12/05/teslas-new-business-battery-backup-systems-for-solar-city-installs/

http://www.solarcity.com/residential/energy-storage

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Re: what to do when the NSW $0.60 gross FiT expires Dec2016

Postby Tracker » Mon Mar 23, 2015 4:21 pm

offgridQLD wrote:Though that was some time ago looks like they have somthing gong with solar city (another sister company they own) http://electrek.co/2013/12/05/teslas-new-business-battery-backup-systems-for-solar-city-installs/


and that is looking about as modular as we need.. :D
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Re: what to do when the NSW $0.60 gross FiT expires Dec2016

Postby Gordon-Loomberah » Mon Mar 23, 2015 4:22 pm

Going up near EV voltages for a domestic battery storage system may give a slight improvement in inverter efficiency, but it would be the end of DIY installations, given the 120VDC limit we have.

offgridQLD wrote: Musk said. “Some will be like the Model S pack: something flat, 5 inches off the wall, wall mounted, with a beautiful cover, an integrated bi-directional inverter, and plug and play.”


** Disclaimer - only for use on walls that are heavily reinforced! ;) **

A 65kWh battery is still very heavy, even with no Lead
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Re: what to do when the NSW $0.60 gross FiT expires Dec2016

Postby offgridQLD » Mon Mar 23, 2015 4:33 pm

Yes a 85kw (P85 model S) battery would require a lot of plaster screws to get it on the wall:lol:. I think that was a bit of a fantasy. Looks like the reality is a more industrial 10kw modular (Steel box) That two people can handle. Much better outcome.

That unit would be great in a caravan motorhome. Two or three of them in a offgrid home would do the trick. Will be interesting to see how the price stacks up for two modules compared to 16x400Ah chinese cells with accessory hardware.

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Re: what to do when the NSW $0.60 gross FiT expires Dec2016

Postby Smurf1976 » Mon Mar 23, 2015 6:44 pm

Just a random thought, but I wouldn't be surprised if 42V were used.

42V is already becoming a standard voltage of sorts in various applications, the basic reasoning is that it's far enough away from 50V to not exceed 50V under any realistic circumstances be it with an AC or DC supply. Staying under 50V is for regulatory reasons in some parts of the world.
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