Shell’s GameChanger (GCxN) Accelerator program, which gives cash to renewable energy start-ups and pays for access to NREL experts has a new intake, or cohort as it likes to call them. This year it has picked a perovskite specialist, a company that absorbs heat from solar panels and stores it to produce more electricity, and another which makes organic flow batteries for energy storage. This doesn’t make Shell the automatic buyer of these companies if their technology succeeds, but we suspect this is the idea. Its picks always have the potential for shaking up the renewables energy market and they get around $250,000 for proof of concepts and validation by NREL, the National Renewable Energy Lab. Chances are with Shell…