"The sun rises in the east and sets in the west." Well, only on a couple of days a year - near the equinox (around 21 March and 21 September) when day and night are the same length for everyone except for those who live inside the polar regions. So, for six months of the year, the sun rises and sets north of the east-west line (which includes winter in the southern hemisphere) and for the other six months, the sun rises and sets south of the east-west line (which includes summer in the southern hemisphere).
Below is the detailed sun angles map for Adelaide's latitude. The points of the compas are around the edge. The centre is "where you are". The upper curve is June 21st (winter Solstice) and the sun rises and sets 81° East and West of north. The centre of the curve crosses the vertical at 32° which is the maximum height (azimuth) that the sun gets to on that day. The lower curve is for the Summer Solstice and the sun rises 29° South of East and sets 29° South of east. Maximum sun height (azimuth) is (in the centre) 79°. So two things are obvious, winter sun is weak (due to low angle) and short lived and Summer thesun spends upto 2/3 of the day South of East/West.
From the above, several things are obvious,
1. For the cold half of the year, the South side of a house does not see sun;
2. The South side of a house sees sun every day for the hot half of the year. So from 1 and 2: minimise the South windows and provide shade (I use citrus trees) in the SW and SE corners to shade the S side house from low summer sun.
3. Big windows to the North (with adequate, possibly movable eaves) will bring in winter sun. Ideally to use this sun you need a floor material that stores heat.
4. Any East/West windows will add unwanted heat in Summer and lose wanted heat in Winter. No E/W windows is good if you can.
5. As Summer sun is high, long hours and hot and as winter is cold and (internal) heat rises - roof insulation is VERY important. R3.2 - R4.1 (depending what you read) is recommended for Adelaide, I suggest R7 ie double height R3.5s. Two other considerations - white(ish) tiles and aircell type proroduct under the tile/roofing batts to keep the roof cool (unless you plan to farm a warmish winter roof from dark tiles).
House orientation in Adelaide should have living areas and large windows (with appropriate eves) facing north to catch the few hours of available winter sun and minimum windows to the south to avoid heat loss in winter and heat gain from the rising and setting sun in summer. East and West window are to be avoided for the same reasons.
Remember, a tree to your North doesn't have to be very high to cast a shadow on you windows or possibly your solar panels.