Comments on: Iron flow battery tech shows promise for mid-duration energy storage https://pv-magazine-usa.com/2021/10/08/iron-flow-battery-tech-shows-early-promise-for-mid-duration-energy-storage/ Solar Energy Markets and Technology Mon, 11 Oct 2021 12:03:39 +0000 hourly 1 https://wordpress.org/?v=6.5.3 By: John Weaver https://pv-magazine-usa.com/2021/10/08/iron-flow-battery-tech-shows-early-promise-for-mid-duration-energy-storage/#comment-128779 Mon, 11 Oct 2021 12:03:39 +0000 https://pv-magazine-usa.com/?p=69753#comment-128779 In reply to Hugh.

It’s not limited to 12 hours, but just so happens that these batteries have been manufactured at that size. Form Energy offers a 150 hour flow battery.

]]> By: Hugh https://pv-magazine-usa.com/2021/10/08/iron-flow-battery-tech-shows-early-promise-for-mid-duration-energy-storage/#comment-128386 Fri, 08 Oct 2021 21:24:14 +0000 https://pv-magazine-usa.com/?p=69753#comment-128386 Please clarify why the storage of a flow battery is limited to 12 hours.
My understanding of a generic flow battery is that the energy is stored in the flow/electrolyte. Ideally that charged electrolyte can be stored for years, at least for days or weeks so the energy from a PV array is stored to be available throughout an extended period of bad weather, not just for the evening.
If the energy storage is just for a few hours, why not use a super capacitor.

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