You can't wire a Alternative Energy home to code ( my personal opinion ,) and they know this. When you scrounge for expensive heavy copper cables, and the code forbids it because it's the wrong color etc.... it is ridiculous.
In our home I use the two flat spade 15amp rated 220v ac outlets for 12v fused at about 20 to 25 amps for DC. Has worked great for the last 15 years. Fuses blow, and outlets are always fine.
I use a (cluster of 5) 1/4" mono phone jacks and a 10amp fuse holder mounted onto a metal outlet plate for smaller items in the home. Purchase the Red handled 1/4" phono plugs to attach to tv's radios and lamps etc. They are definitely good up to 10 amps dc and a lot more compact and safe as compared to a ridiculous cigarette lighter plug (unless you are a chain smoker.) Once again these have worked well over the 15 year period that I have had them installed. This gives you 5 outlets per plate.
As usual, it's probably not up to the nonsensical code standards, But I use custom made welder panels and welder jacks in the home for high power current usages. They are compact, you can connect 2 ga or 4 ga ultra flex welder cable to them. Fuse accordingly, I usually use a in line 100amp fuse.
I'm also now running 120vdc around the shop and home. Once again what does the electrical code say about that ? You'll have to tell me as It's bound to be a lot of nonsense. I use standard 15 amp 115v outlets with bright red flourescent tape covering the outlet plate to denote them as DC.
I wouldn't think of using any other jack for 120vdc as all of my industrial brush type shop power tools are rated ac/dc at 120v and I can plug them right into the DC jacks. If I choose to run them on standard ac I can do that as well. I'm not going to cut the plugs off of all of them to please some bureaucrat.
The industry needs to get practical about custom DC jacks for homes, and instead of turning it into a money making spree like everything else. They need to think of the environment and the welfare of the country, and leave the greed behind. Something I expect they can't bring themselves to do.
Personal Opinions only.
:>)
John II