https://electrek.co/2017/06/17/tesla-po ... tric-grid/Australia is feeling the need to stabilize its electric grid through energy storage and Tesla is among several companies trying to present their battery packs as ideal solutions.
Tesla has won the latest contract with Transgrid, the company operating the NSW transmission grid, in order to deploy Powerpack stations at several sites across New South Wales.
They announced this week that the first installation will be a relatively small 250kW/500KWh Powerpack station at the City of Sydney’s Alexandra Canal Works depot. It should be completed in the coming months.
“The Powerpack battery will save the City of Sydney on its energy bills and allow it to add more solar panels to the Alexandra Canal Works depot, helping to manage the energy flow by storing surplus power generated in daylight hours for lighting, airconditioning, plant and equipment use at night.”
As part of a contract awarded to Tesla, the projects will follow several more across Transgrid’s network in order to create energy storage capacity for demand response.
at a guess then, since the last reported cost of utility scale Power bank installation was approx US$350,000 /MWh,....Mr Musk tweeted back, vowing to build it within 100 days, "or it is free".
.....But it was his subsequent offer to almost halve his price, in response to Mr Cannon-Brookes' request for "mates rates", that has captured the imaginations and wallets of high-net worth individuals, superannuation funds and other investors, who have showered Mr Cannon-Brookes with offers of funding.
"Elon almost halved ... the price of what's available at a grid-scale storage capacity, which was a very bold offer and blew up a lot of people's models as to what was possible in this space," Mr Cannon-Brookes told RN Breakfast.
"When the pricing halved, the economics become vastly different over a 20-year term of an asset like this in infrastructure.
..that would put the 129MWh SA installation cost at approx US$17.5 million ..Bargain ! ..(Au$23 m)....In September, two 210 kWh battery packs cost $145,100 all in, including the cost of an inverter and installation.
?? ..I do not understand why Musk and others, keep saying this..".3 times more powerful than the next biggest"... When Tesla have just installed a 80 MWh battery in California...??....it is intended to sustain 100 megawatts of power and store 129 megawatt hours, which could power about 30,000 homes according to Tesla. That was more than three times as powerful as the world's next-largest such battery, Mr Musk said on Friday........
Interesting point.Hillhater wrote:?? ..I do not understand why Musk and others, keep saying this..".3 times more powerful than the next biggest"... When Tesla have just installed a 80 MWh battery in California...??....it is intended to sustain 100 megawatts of power and store 129 megawatt hours, which could power about 30,000 homes according to Tesla. That was more than three times as powerful as the world's next-largest such battery, Mr Musk said on Friday........
http://solarlove.org/tesla-completes-wo ... nths-time/
Companies like Zen Energy are just in it for a quicker buck and don't really care about the environment any more than BHP or Chevron do.Hillhater wrote:at a guess then, since the last reported cost of utility scale Power bank installation was approx US$350,000 /MWh,
http://www.businessinsider.com/tesla-po ... per-pack-3..that would put the 129MWh SA installation cost at approx US$17.5 million ..Bargain ! ..(Au$23 m)....In September, two 210 kWh battery packs cost $145,100 all in, including the cost of an inverter and installation.
by my calcs that puts the cost at about US175 per kWh .
All of which makes some of the other projects in the same state very interesting from a cost viewpoint..
.. ie :-- a 400MWh battery ( ) from Lyon Group ...Au$200-300 million !!
http://www.abc.net.au/news/2017-03-30/n ... nd/8400952
?? who is screwing who ??
http://www.abc.net.au/news/2017-07-07/w ... rk/8688992....it has slightly more storage than the next biggest lithium battery, built by AES this year in southern California.
But Tesla's 100 MW output would be more than three times larger than the AES battery and five times larger than anything Tesla has built previously.....
The largest battery storage system that Tesla has built to date sits on a 0.6-hectare site at Mira Loma in southern California.
American electricity company Southern California Edison was also involved. It has a storage capacity of 20 MW, or 80 MWh, and is said to be capable of powering 15,000 homes..
BUT .. Teslas warranty for powerwall 2. (a smaller version of the utility Powerpack2). States a warranted 70% capacity retention after 10 years, whilst other sources quote 80% retention after 5000 cycles for the Powerpack.......
Tesla says the lithium ion batteries in the Jamestown array will have a life of about 15 years, depending on their usage and how aggressively they are recharged.
The company says the battery components are replaceable and the circuitry should last 20 to 30 years.
And this from one of the comments in reply.....Of the 100MW/129MWh in this array, around 70MW of capacity is contracted to the South Australian government to provide grid stability and system security. It will likely mostly provide frequency and ancillary services (FCAS) when needed (such as a major system fault, generator trip or transmission failure).
This part of the battery is designed to last 10 minutes, which sounds short but is long enough to keep the grid stable while slower machines such as gas generators can respond.
The other 30MW of capacity will have three hours storage, and will be used as load shifting by Neoen for the Hornsdale wind farm, where it will be located.
Please note: The 30MW and 70MW ratings mean exactly that – it is the capacity at the connection point.
Government part contracted: 70 MW * 1/6 hour = 11.7 Mwh storage (after 1/6 hour they don't need to respond to government, who are supposed to have spun up the gas plants or whatever). Interestingly they need to be able to either produce 11.7 MWh on demand, *or* absorb 11.7 MWh on demand.
Neoen part contracted: 30 MW * 3 hour = 90 Mwh storage (after this they are not required to provide extra capacity and Neoen can be forced to curtail wind, or not allowed to discharge batteries further) Here, Neoen can push in up to 90 MWh before it has to stop, and can withdraw down to zero -- like a bank account with a maximum size.
So think of it as follows:
2.6 Mwh (2%) base anti-bricking protection, always full
11.7 Mwh "always full" until the government needs emergency power
90 Mwh for Neoen to fill and empty as it likes
11.7 Mwh "always empty" until the government needs to absorb excess power
12.9 Mwh (10%) anti-overcharging protection at the top, always empty
This makes sense. Almost all the time they'll be in the middle of the charging range of the battery. They'll only be on the outer edges when the Neoen part is empty and the government requires a discharge for grid stabilization, or when the Neoen part is full and the government requires a charge for grid stabilization. Even then they'll be close enough to the middle of the range to charge/discharge at full speed, and to maintain long battery lifetime.
"C rate" of charge/discharge when using the goverment part, since the whole system can discharge in parallel: 0.54. Which is EASY, since it's slower than a Tesla Model S discharges its batteries when you hit the accelerator. This should always be possible.
I see how clever the design is here. (If my educated guesses are correct). There are a whole bunch of parallel batteries. So each battery is allocated this way.
It would have been much harder to make this cost effective with ONLY the government contract; due to C-rates, it would have required a lot of batteries which were basicaly sitting idle a lot. it is cost-effective because it has BOTH the government contract and the Neoen contract.
In order to supply the required MW power rate for the government, given the C-rate for the batteries, they had to put in a lot of batteries -- which meant a lot more MWH of capacity than is actually needed for the government. So the excess MWH are sold to Neoen who doesn't need a high power rate but can profit from capacity.
Very clever. I don't think I would have figured this out myself. It's a slick design.
? Max 12 hrs ? ..If you are using batteries as back up for solar, you never know how long you may have to depend on them.jonescg wrote:........ Since a battery would only ever be needed for a maximum of 12 hours, it's peak capability is an important number, with capacity (MWh) being secondary, depending on the duration of demand.
In the context of a grid battery, 12 hours is probably generous. But it's likely that 12 hours at an arbitrary power factor (say, 33% of the nameplate power) might become a benchmark. Even a cloudy day will generate something, but certainly not enough to charge it in a day.Hillhater wrote:? Max 12 hrs ? ..If you are using batteries as back up for solar, you never know how long you may have to depend on them.jonescg wrote:........ Since a battery would only ever be needed for a maximum of 12 hours, it's peak capability is an important number, with capacity (MWh) being secondary, depending on the duration of demand.
....The whole facility generates 13 megawatts of energy, which adds up to around 19,438 MWh of electricity per year, and can store up to 52 megawatt hours of power. It does this with a cost to Kauai of 13.9 cents per kilowatt-hour, locked at that price for the duration of a 20-year contract. That’s under half the price the island currently pays for power generated from burning diesel fuel, which is its prevailing source of energy. The new solar storage facility can build up enough energy to power 4,500 Kauai homes through the night, .....
“In this way we can have very robust, reliable solar electricity delivered back to the customer almost 24 hours a day,” Straubel explained in an interview. “This is a very different type of project. Usually you have solar panels directly coupled into the grid, or into your house, and they feed their electricity in whenever the sun is out and whenever a cloud comes over they stop.”