This week Torsten sits down with one of the most influential voices in the solar research community, Martin Green, aka “the father of modern PV,” for a retrospective look at the early history and rapid progress of solar technology.

Martin’s groundbreaking work has shaped the industry as we know it, and his story is one of innovation and grasping opportunities as they arose. His early interest in microelectronics in Australia in the 1960s led to developing world-record-setting solar cells in the 80s. Humble despite these amazing achievements, Martin jokes, “One of my colleagues used to say I was famous in my own lunch box.” But with a ferry in Sydney Harbor set to be named after him, his impact is undeniable.

Martin details his pioneering work with what is now known as TOPCon and with PERC technology – both major breakthroughs in solar cell architecture. Although going against conventional wisdom and in a constant battle to secure funding, his team persevered. His thoughts on the naysayers? “We were told at the time we'd never make it into production. So, yeah, don't listen to the advice that you get given."

Looking ahead, Martin sees potential for even lower solar costs. "We might be looking at a future where solar is not just cheap, but insanely cheap." An icon in the field, his story is a must-listen for anyone curious about how solar became a leading solution in the fight against climate change. PLUS On the Espresso segment this week, Torsten touches base with another Aussie solar innovator, James Allston from Orkestra Technologies. James is currently in Europe, setting the stage for the expansion of his software startup, and he provides some key takeaways from the recent Solar & Storage Live event in the UK.