Looks like it's going to be a cloudy week, but that won't stop this week's roundup from shining.

Australian companies aiming 100 per cent renewable energy will meet at the RE100 in Sydney; Beverage colossus Coca-Cola plans to upgrade its solar production to cut annual energy costs; A globe-trotting solar-powered tuk tuk is set to fire up conversations on sustainable transport; And a startup in Israel is implanting tiny solar panels on electronic devices.