A redox flow battery for MW-sized solar-plus-storage

Apr 29, 2020 02:51 PM ET
  • Matt Harper, primary business police officer of newly-merged British-Canadian vanadium redox circulation battery company Invinity Energy Systems has actually talked to pv magazine concerning the VS3-022 Battery Unit it is marketing for grid range solar-plus-storage projects as well as why it might be a much better wager than lithium-ion.
A redox flow battery for MW-sized solar-plus-storage
Image: Invinity

With London-based personal business redT power as well as transatlantic peer Avalon Battery Corp last month introducing a ₤ 57.7 million merging ($ 71.6 million) to create vanadium redox circulation battery producer Invinity Energy Systems, Matt Harper, primary industrial police officer of the brand-new entity, has actually talked to pv magazine regarding the VS3-022 Battery Unit Invinity is supplying for grid range solar-plus-storage projects.

The Invinity agent stated the firm, which was created through a reverse requisition as well as is detailed on the London Stock Exchange, has greater than 40 operating circulation battery storage space projects. "The bulk of our fleet remains in solution along with megawatt-scale PV projects," claimed Harper. "This consists of a 1 MWh project in Iowa, USA, which is sustaining a 1 MW behind-the-meter PV variety, and also a 2 MWh power storage space system in Qinghai district, China, that is set up as part of a 1.6 GW solar park."

With Invinity targeting the solar-plus-storage market, its regular consumer desires at the very least 1 MW of solar-plus-storage ability, according to Harper.

The VS3-022 battery has actually a reported storage space ability of 220 kWh as well as continual optimum DC power of 76 kW. Yearly destruction of storage space ability is suggested at less than 0.5% as well as power performance yearly deterioration is less than 0.1%, according to the maker. The 6.058 x 2.438 x 2.4 m battery has an ambient operating temperature level variety of-- 5 to 45 levels Celsius as well as a life time of 25 years as well as 20,000 cycles, according to Invinity, although Harper asserted the item does not break down in any way with usage.


" Industry experts approximate totally set up lithium-ion rates at around $450/kWh for C&I [commercial as well as business] projects and also our vanadium redox circulation batteries coincide rate or more affordable on an ahead of time price basis," stated Harper, that stated Invinity items use a reduced levelized price of storage space than lithium-ion choices.

" In applications where the batteries are made use of day-to-day, we're around 30% listed below lithium today, on a levelized basis, with a clear course to 60% listed below lithium within 2 to 3 years," included the primary industrial policeman.

The circulation batteries, claimed Harper, are preferably matched to hefty biking applications and also those calling for long period of time releasing as well as billing for greater than 3 hrs, as an example when paired with periodic renewables or to supply grid solutions. "They are well fit for usage together with utility range solar PV plants as well as in commercial as well as industrial applications, when it comes to instance in information facilities, water therapy websites, warehouse as well as reusing centers-- particularly when combined with solar as they can give substantial power financial savings, accessibility to brand-new earnings streams as well as [can] assistance to fulfill carbon decrease targets quicker."

Although such gadgets are not ideal for family systems, vanadium circulation batteries can be made use of for area microgrid as well as "end of road" applications, Harper informed pv magazine.


Invinity claims its battery uses 5 vital advantages. "In enhancement to the substantial prices advantages I've currently specified," stated Harper, "our systems are totally recyclable, they do not break down with usage, they are longer-lifetime as well as longer-duration than lithium and also they posture no fire threat. Actually they are most likely to produce a fire than begin one."

The Invinity spokesperson claimed consumers are starting to check out choices to lithium-ion batteries. "There are a series of forecasts available for the possible development of the circulation market over the coming years, with some specialists forecasting that it can get to ₤ 3.5 billion by 2028," claimed Harper.

The primary business policeman declined to discuss lasting expense decrease strategies however explained the price of Avalon's vanadium circulation modern technology has actually fallen by fifty percent because business launch of the Oakland organisation' 2nd generation item in 2017.

With the brand-new firm energetic in Europe, North America, Asia, Australia and also Africa with greater than 10 MWh of systems set up, Harper included: "The west-coast of the USA is an extremely fascinating market and also there's additionally significant possibility in Australia, Germany as well as some Eastern European nations that are changing their electrical power markets."

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