Directly east — 90% Directly west — 82% With a typical Tasmanian roof slope of 22.5 degrees, west-facing panels will produce moderately more power in the afternoon than morning, while it’s the other way around for east-facing panels. What is best will depend on household or business electricity consumption patterns, but generally, in Tasmania, it’s better to have panels facing east rather than west. This is not just because the total output is higher, but because it’s useful for heating homes and businesses on cold mornings. With an average January high temperature of only 22.7 degrees in Hobart, there is far less demand for afternoon air conditioning than on the mainland.