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Virtual Power Plant

Victoria solar feed in tariffs to vary based on time.

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Victoria solar feed in tariffs – the state’s Essential Services Commission has this week released the details of a brand new feed in tariff (FiT) which changes depending on the hour of the day. It will be introduced to Victoria on July 1. Whilst not compulsory to begin with due to their complicated nature, the tariffs will likely be enforced in 2019/20.

Victoria solar feed in tariffs overview

Victoria solar feed in tariffs - Essential Services Commission
Victoria solar feed in tariffs – Essential Services Commission (source: esc.vic.gov.au)

Changing from a flat FiT to one that is more in life with electricity demand makes sense given that a major problem for solar energy is dealing with supplying power in peak times and during heatwaves. Previously solar feed-in tariffs were calculated on a flat basis, and, although they’ve been raised recently, it’s been neglecting the idea that offering more money for people to feed power back into the grid via a ‘virtual power station’ is likely to help mitigate periods where electricity is unavailable or at a ridiculously high price. 

The idea of a ‘virtual power plant‘ is something being worked at via a supplier level (The AGL Virtual Power Plant‘), a state level (ACT’s Next Generation Energy Storage Program) and a combination of the two (Tesla’s virtual power plant in South Australia). This marks the first time they’ve tried to do this via varying FiTs, however., 

According to RenewEconomy, the regulations will require retailers pay a minimum of 29c per kWh for those who exporting power between 3pm and 9pm, a minimum rate of 10.3c per kWh those feeding power back into the grid between 7am and 3pm, and a minimum rate of 7.1c/kWh (which is actually less than the current price of 7.2c) for those exporting energy during off-peak hours – during 10pm and 7am. So, if people want, for 2018 they can pay an alternative flat rate of 9.9c/kWh, down 1.3c/kWh from the previous flat rate. 

The ESC said that the lower cost for the flat rate from modelling from ACIL Allen. This modelling showed that the “any-time price”of electricity has fallen, but the evening peak price is now higher, and that the constant addition of solar connections will lead to even lower day time prices.

 

 

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Tesla Virtual Power Plant in SA

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A Tesla Virtual Power Plant will be built in South Australia, comprising of 50,000 home solar and battery systems state-wide. The deal between the South Australian Government and Elon Musk’s Tesla was announced last week by Premier Jay Weatherill ahead of the SA March state election. 

The SA government have pledged to do their part in the implementation of the virtual power plant scheme with a $2 million grant and a $30 million loan from the state Renewable Technology Fund.

Tesla Virtual Power Plant

According to Premier Weatherill, a trial of the scheme has already begun in Housing Trust properties, with 100 properties to receive their systems by EOFY (June 30), and another 1,000 in FY 18/19. After the trial is complete another 24,000 Housing Trust properties will receive the systems. 

Since there’s no word yet on the Tesla Powerwall 3 release date, they’ll use the Powerwall 2 batteries which have a 13.5kWh size. 5kW solar arrays will also be used for the 50,000 homes included in the virtual power plant. No word yet on the specifics of the solar panels the arrays will consist of but we’ll bring you that information as it becomes available.

Tesla Virtual Power Plant - Powerwall 2 Solar Battery
Tesla Virtual Power Plant – Powerwall 2 Solar Battery (source: tesla.com)

A statement from Tesla was released: 

“When the South Australian Government invited submissions for innovation in renewables and storage, Tesla’s proposal to create a virtual power plant with 250 megawatts of solar energy and 650 megawatt hours of battery storage was successful. A virtual power plant utilises Tesla Powerwall batteries to store energy collectively from thousands of homes with solar panels. At key moments, the virtual power plant could provide as much capacity as a large gas turbine or coal power plant.”

Danny Price of Frontier Economics discussed the program with the ABC:

“The biggest saving for consumers is that they don’t have to pay for as much network cost to deliver power to them because they’re generating their own power,” Price said.

Zoe Bettison, the Minister for Social Housing, discussed the reason they are installing these solar + storage systems in Housing Trust properties:

“We know that people in social housing can often struggle meeting their everyday needs and this initiative will take some pressure off their household budget,” she said.

A mammoth deal and step forward for South Australian solar – we’ll bring you more information as it becomes available!

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ACT’s Next Generation Energy Storage Program

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The ACT’s Next Generation Energy Storage Program will provide solar batteries to over 5,000 homes and businesses by 2020, offering $25m of funding so ACT residents are able to take advantage of rapidly evolving solar battery technology at a subsidised price. 

Next Generation Energy Storage Program

Next Generation Energy Storage Program in the ACT (source: actsmart.act.gov.au)
Subsidised Solar Batteries – Next Generation Energy Storage Program in the ACT (source: actsmart.act.gov.au)

According to ACT Climate Change Minister Shane Rattenbury there are plans to increase the current amount of storage by up to 36x by 2020: 

“We’ve already had around 400 batteries installed across the city. It’s providing over a megawatt of storage which is both helping households cut their energy bills, manage their own energy usage, but also provide backup for the grid here in the Territory,” he said.

“The battery storage roll-out program is building on Canberra’s reputation as a globally-recognised hub for the renewable energy industry,” Mr Rattenbury was quoted as saying – noting that the program will offer support of up to $825 for each kilowatt of sustained peak output for homes and businesses who install a battery (it can be connected to a new or existing PV solar system). The government estimates that this will represent a subsidy of approximately $4,000 for an average household solar system. 

Six partners have been awarded $3m in grants to help fund the project: ActewAGL Retail, Energy Matters, EPC Solar, Evergen, ITP Renewables, Origin Energy, Power Saving Centre, and Solar Hub. EPC Solar and Evergen were already in the project, the rest are new additions. 

Mr Rattenbury also noted that this project will also help expand the virtual power plant Reposit Power and EvoEnergy are currently trialling: 

“The batteries are also contributing to the world’s largest residential virtual power plant being trialled by Reposit Power and EvoEnergy (formerly ActewAGL Distribution), which allows battery owners to sell their energy to the grid to help support the electricity network.”

For more information and how to apply, click here to download the actsmart battery storage fact sheet. 

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AGL Virtual Power Plant Upgrade?

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AGL have confirmed that their trial of networked home storage batteries has been halted temporarily as they manage unknown variables with their ‘Virtual Power Plant’ – which was labelled by AGL as the ‘largest project of its kind in the world’ earlier this year.

Virtual Power Plant

AGL Virtual Power Plant
AGL Virtual Power Plant (source: @AndyVesey_AGL)

The scheme went live in March at West Lakes in Adelaide and has see hundreds of households’ solar and battery storage linked together to form a 5MW ‘virtual solar power station’. The scheme cost $20m and ARENA (the Australian Renewable Energy Agency) kicked in $5m of that to back the project. As such the cost to the consumer was heavily subsidised and interest has been very high within the test area. 

At the time AGL MD and CEO Andy Vesey said “Our South Australian VPP demonstration is a practical example of the new energy future,” – noting that AGL planned their ‘VPP’ will deliver benefits by increasing grid stability (albeit just for the test group for the time being). The batteries installed were by Sunverge, a producer of intelligent energy storage and advanced AC-coupled storage systems. They use a proprietary virtual power plant software, and in this situation were unique as all the batteries could be remotely operated by AGL. Some customers paid extra for the AC coupled storage systems so they could use them during a blackout. 

There have, however, been potential hiccups with the Virtual Power Plant this week as AGL wrote to waitlisted customers to advise them they won’t receive any of the current Sunverge batteries, and that they plan to utilise “next-generation battery technology into our next phase of installations”. 

The ABC asked AGL about the issues with their VPP and they dodged the question about how many batteries being replaced (and what their upgrade plan is), but a spokesman did say that “Lessons and customer feedback from the initial phase of the project are being used to shape subsequent phases and we want to ensure that all customers have an opportunity to opt in to the next generation offering,”

We’ll keep you updated to see what they’re going to offer for the next phase of their Virtual Power Plant – another exciting step for energy storage technology for South Australia.

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