It is ridiculous that the only standard plug for this voltage is the automotive cigarette lighter. 3) Provide a secondary wiring system in all new houses at 12V DC based on the new plug.

Here's what you should know about AC- and DC-coupling. When we think about solar panels and batteries, we don't really give much thought to all the wiring and other little boxes on the wall.

TE’s SOLARLOK SLK 2.0 DC plug and splice connectors connect the PV cable to the solar panel in field installations with extended voltage ratings of 1500V TUV/IEC and UL. Image: TE TE ...