If you ran your lights off of a different panel than your main appliances you wouldn't need an inverter for the LED's. Almost anything that doesn't have a spinning motor is run off of DC rather than AC. From what I have read though, DC will generate MUCH more loss through the wires than running AC does but unless you are transferring it to a second building, the losses should be minimal. Even if you do, using a 24 volt system at the bank and then stepping it down with resistors should make up for it and also create less of a loss than the 12 volt system would over distance.
I'm absolutely devouring this book I picked up. It goes way more in depth than I thought I was ready for but I can make the links in my head with minimal searching online. This book is supposed to be an electricians reference to solar power I assume because it makes the assumption that you have a base knowledge of how "normal" power works. The only basis I have off our normal power system is because of the research I did on Tesla vs. Edison and the original "power wars". (pun intended)
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