Currently the average price per kW is approximately 26c (and will only go up!). The average household consumes 8160kW per year. Using these approximations, you may pay $2100 each year for your electricity for your home.
Research indicates that, in Canterbury, you could generate 3668kW (approx $900 worth of power) from a 3.24kW Solar system* in one year. The length of time it takes to recover your initial investment is typically 7 - 10 years. By investing in solar now, you will be generating your own power and saving considerable amounts of money for every year thereafter.