Ann: Redflow awarded 200kWh project with ACCIONA Energia, page-6

The bit at the end about using ultracapactors in combination with LDES is super interesting.
Not something redflow has been involved with before . Ultracapacitors allow very high current for brief bursts, kinda the opposite of what a zbm does , but they also quicker & more powerful than lithium. They can be cycled almost forever without degradation