We used the outfit in hawkes bay 2 years ago, i can tell you the job was a balls up, the service was bad and they had to sent somebody new to do the installation all over again as unison wouldn't sign the safety compliance ( the way it was installed was dangerous.) We also bought the catch power to warm our water.It actually wasn't installed and was sitting on 1 of my shelf, we had to call them to get it installed way after the job was finished. And now, aftsr installing a big water cylinder, 3 people living at home, we have enough warm water for 2 showers a day.Noone explained to us how to use it and it's not doing its job. I am very very disappointed with solar panels and with a big bill left to pay I feel cheated, the most useless thing I ever bought in my life and Harisson are hopeless, or at least their subcontractors here in hawkes bay. they take your money and then no follow up (except to suggest we use them every year to clean our panels and give them more money), if I could have I would have put 0 star. I was very pro solar panel,not anymore. I wouldn't recommend putting solar panel and definitely not using Harison outfit.