Posted By Lee Dodge on 04 Feb 2012 11:14 AM
I considered running 12-V DC wiring around an observatory site that I have since it has a solar PV system and batteries. I was surprised at what large diameter wiring would be required to avoid significant voltage drops in such a system. Going to 24-V instead of 12-V would help, but you still need to consider the length of wiring runs with the high cost of copper.
The reason Westinghouse beat Edison...