We built a new home in Wanaka. 20 Solar panels Tesla powerwall, heat pump for hot water and underfloor heating, a/c in upstairs rooms and an electric car which we charge for free!!!  After 1 year we have generated 11MW and used 12MW and purchased almost no peak electricity. There has been 4 power cuts in town that we have not noticed. We receive 17cents per kw but going down to 15cents through Octopus and off peak rate going from 21cents to 23cents. Oh for a fairer system.