finally, we now have this:

Author	Message
phil99 Guru Joined: 11/02/2018 Location: Australia Posts: 3407	Posted: 06:01am 22 Nov 2024         Quote   Are there any Electricians that work with DC electrical? Other than those certified for solar installation work, probably not many these days. Long, long ago I was a sparky when there was still some reticulated 200VDC in Melbourne CBD for lifts in old buildings. The first 2 years of trade school was all DC and included theory and prac. on all types of non-electronic DC motor and generator.   Quote   I looks like another made up Regulation to justify there own existence. When the State Electricity Commission was privatised the new distribution companies were given the power to set "safety" regulations beyond those in AS/NZS 3000. They have a vested interest in making it difficult to avoid buying their power. That said there is a place for regulations for the safe installation of large batteries. Doing cell volts and SG readings on 460V banks (200 cells in series) made me a bit nervous. All exposed terminals. The biggest one delivered 50kW for 12 hours on a load test. No aluminium ladders allowed in that room.