Australian Vanadium (ASX:AVL) has kicked off Project Lumina, seeking to build a modular 100MW Vanadium Flow Battery (VFB) for use in Australia. Built by 100% owned subsidiary VSUN Energy Pty Ltd, the company is seeking to shore up faith for VFB builds in the ‘big battery’ – or Battery Energy Storage System (BESS) market. ‘Big Batteries’ are, for that acronym, sometimes called BESSies. According to AVL, VSUN has run the numbers and states a 4-hour 100MW VFB battery with a storage cost of A$274 per megawatt hour would be economically competitive with lithium-based BESSies. Built to paper design,…