The need for communications to enable DC power to be successful

Alternating Current (AC) is the most common form of power available within buildings. This has historical reasons rooted in large-scale utility generation and distribution of power. With the rapid emergence of local renewables (notably solar) in buildings, the availability of Direct Current (DC) power is becoming more prevalent. In this position paper, we argue that managed power distribution of DC is possible with the addition of communications about power. We claim that with communications DC power distribution becomes much more efficient and effective than with no communication, and provides other benefits. The Local Power Distribution (LPD) model is described where commodity interfaces enable a “plug and play” approach to operating DC power sources, batteries, and loads within a building. We seek a future where communications coupled with DC power distribution, storage, and use can create buildings that are more efficient and easier to operate.