Solar energy will soon become "like Wi-Fi or optical fibre" that consumers expect in virtually all buildings and even boats and caravans, according to the inventor of light-weight panels being introduced in Australia. Shi Zhengrong, once dubbed the "Sun King" when he became the world's first solar billionaire in 2006, says the weight of regular panels at about 20 kilograms per square metre restricted their use. His firm, SunMan, has ditched the glass and other materials, cutting weight by about three-quarters while maintaining standard electricity conversion efficiency rates of about 22 per cent. Shi Zhengrong, the founder and chief technology officer of Sunman – the company that has produced new light-weight solar panels that will slash power bills at the National Maritime Museum in Sydney.Credit:Renee Nowytarger "About 40 per cent of the commercial market cannot be served by conventional panels, but with our panels we can make this market possible," Dr Shi said. Regular pane..