Generally I have been impressed by the information in South Australian government websites. In my previous job at NEMMCO, I would often refer people to ESCOSA's (Essential Services Commission of South Australia) information about electricity and full retail contestability (FRC). It seemed to be one of the few places to find less-technical information about electricity - stuff that is understandable to people without a degree in electrical engineering or years of experience in the subject. Another helpful publication is NEMMCO's An Introduction to Australia's National Electricity Market.
It's my opinion that within the broad electricity subject, metrology (about electricity metering) would have to be one of the most arcane sub-specialties. This was another place where I found ESCOSA's site to be helpful . The South Australian metrology procedure had a helpful cheatsheet (on page 30 of the pdf document) explaining the differences between the types of meters. It's a little dated now - with references to the now defunct National Electricity Code, and this document will probably disappear entirely within a couple of years when the state-based metrology procedures are replaced with national ones. Still, while it's around, the cheatsheet is helpful and isn't just relevant to South Australia.