Occasionally someone builds a house "off the grid." They put a bunch of solar panels on the roof and never connect to an electric company. These folks all use DC in their homes. Why do you suppose that is?
It is not quite true using dc in the homes. Sometimes that is true, but more often the dc is converted by a dc-AC converter, then used.
Why? Sometimes it is cost, sometimes it is "religious", sometimes it is related to political beliefs, in the end, they think it is a good idea.
The reason why some people who live off the grid choose to use DC (direct current) in their homes, particularly in conjunction with solar panels, is because it allows for a more efficient energy conversion and usage.
Solar panels generate electricity in the form of DC, as they convert sunlight directly into electrical energy. This DC electricity needs to be converted into AC (alternating current) if it is to be used with standard household appliances and devices that typically operate on AC. However, converting DC to AC can result in energy losses due to the conversion process.
By using DC directly in their homes, off-grid residents can avoid these energy losses associated with converting DC to AC. This is especially advantageous since most of their electrical energy is already generated and available in DC form from their solar panels. By utilizing DC appliances and devices designed to operate on DC power, they can maximize the efficiency of their energy usage.
In addition to the efficiency factor, using DC in off-grid homes also simplifies the electrical system. Since there is no need for an AC inverter (a device that converts DC to AC), the system becomes less complex and potentially more reliable, as there are fewer components that could fail.
It is worth noting that while some off-grid homes exclusively use DC, others may have a combination of DC and AC systems. In such cases, DC might be used for specific purposes like powering lights, charging batteries, or running low-power appliances, while an AC inverter is used to transform DC to AC for heavy-duty appliances that are not available in DC versions. This combination allows for flexibility and optimization based on the specific energy requirements and available appliances.