I am thinking that the price rises will encourage more people to put solar on their homes if they can. Once there becomes enough people with solar and there becomes an abundance of solar during the day, we may be like parts of Australia where solar customers will be charged for selling back to the grid. I saw a facility in the gvt site for solar price modelling , and it has provision for a sell back tariff already there. So we know that it is only a matter  when not If. 

We don't have the Westpac access to the interest free loans, were with ASB and there is not much incentive to borrow for future improvements on the solar system. Since we paid for it up front, the yearly gain is put aside for future upgrades etc. Living in Hamilton, our rates went up by $900 per year, so there is always something taking money out of your pocket. I feel sorry for renters who may see another increase in the rents again. 

Last thoughts. The more years before you retire, the more benefit you will see from a solar installation. So people in their late 30's or early 40's are the best position to get solar on board.  I compared our system, to another with a fellow from work. Although we paid more up front, due to the ability to sell more back to the grid, we effectively pay off our system sooner. We also were more self sufficient during the lower output days as well. Over the course of the year they will only have a very small amount to pay at the end of winter. So their July and August bills will have some to pay.

Still on the fence about adding another 2kw to help out during the very low solar days and the days with fog to lunchtime. If I wait too long, the same panels I have will not be available. Just the nature of the advancing technology.