The day we switched on the solar power system was the culmination of a long design and installation process. Clever solar panels maximise electricity production while the inverter/battery keeps the lights on at night. The aim is to minimise importing grid electricity but export as much solar power as we can.
During Unit 1 construction, the team showed that an offgrid power system could meet the electrical requirements for all but the most demanding users. Based on that experience, the system was reassembled to power Unit 2 and 3 construction.
Achieving a NatHERS Star rating of 8.2 Stars means our home will be comfortable to live in without the need for excessive amounts of energy for heating and cooling. Studies of similar designs show the additional cost to install the necessary sustainability features are financially justified.
Installing solar cells and then fitting a battery storage system might be worth a few greenie points, but is the extra cost justified on a purely economic analysis? Not yet maybe, but current trends indicate that time isn't too far in the future.