There's nothing stopping you from doing this aside from regulations in some locations. Some people off grid will run heavy gauge wire throughout their house an

There's nothing stopping you from doing this aside from regulations in some locations. Some people off grid will run heavy gauge wire throughout their house and use appliances found in mobile homes, as many of them are significantly more power efficient but cost more. They connect them to banks of AGM batteries and charge controllers connected to solar, wind and sometimes even low volume hydro. You can find hundreds of videos on youtube of people doing this. This is especially useful if you freeze some of your foods and have spotty commercial power. The battery banks and other sources will fill in the gaps where commercial power is not always available. High current DC connectors are becoming more standardized and more available on more devices as more people are turning to inverters and battery banks. Using devices designed to connect directly to batteries saves having to buy expensive inverters, sometimes.