VRFBs30 May 2020 09:48
I see on this bb that there are one or two working hard to cast doubt on the effectiveness and / or competitiveness of VRFBs compared to lithium-ion batteries. Perhaps the best people to listen too on this are folks that actually know what they are talking about. The extract below is from an interview with Mikhail Nikomarov (CEO of Bushveld Energy and Chair of the Energy Storage Committee of Vanitec, and Fortune Mojapelo (CEO of Bushveld Minerals, a company heavily involved in Vanadium production and driving forward the energy storage industry through investments in companies like IES). MN and FM were interviewed on 10.10 2019.
MN: “I think that when you think about lithium ion and then the flow battery the difference is do you need power or do you need energy? Use the comparison of a car. In a car the motor gives you the horse power - how fast can you go, how much tork can you generate. But it's the gas tank that tells you how far you can go at that speed with that power. And the flow battery once you add in energy you have a 4 hour battery, 6 hour battery, 8 hour battery, it becomes extremely cost competitive to lithium even despite the cost decreases that lithium has seen. So if you are looking for 15 minutes of storage, 30 minutes of storage, even just an hour, you go and you buy a lithium ion battery. That's why they are so successful in the US where historically you've only had a market for frequency control and other types of ancillary services
However as the trend is moving to long duration where you need capacity support multiple things for a battery to do. Deferral of transmission investment, distribution investment. This is where the flow battery becomes extremely attractive, and one other benefit that I would add is the V battery doesn't degrade. So if you are using it every single day the capacity you have in one year, ten years, twenty years is basically the same. Whereas for a lithium battery you will have very quick degradation, and getting it to last beyond 10 years or getting it to use it much more than once per day is going to be very difficult. So once you've got these use cases of long duration, fairly frequent use the technology becomes not only compelling but extremely attractive."
FM: "By some estimates 90% of stationary energy storage applications by 2027 will be of a long duration nature which really plays to the strengths of VRFBs."
Rather than listen to disruptive pi’s with hidden motives it is better to seek the opinions of people that actually know what they are talking about.
Just my opinion of course