George from QueenslandBeing a retired Electrical Engineer and owner-builder with electrician licence I was in a good position to judge solar system quality as well as installation quality. I must say I was impressed in both respects with Solargain sales and instalers. The 4kW system made of QCells Q.Power 270Wx15 solar panels and Fronius Primo 3.5-1 Inverter are regarded as high quality reliable components and of course Clean Energy Council approved. The installation was done professionally. Solar panels are mounted on strong framework paying attention to elimination of corrosion where dissimilar materials are involved. Cabling was run in conduit in particular to protect them from sun damage. Any technical questions I had were answered professionally. One area of concern was hot water system (HWS) which was on off peak tariff 33 (quite expensive). Recommendation was to eliminate tariff 33 and run HWS off solar system with a timer heating around 10am-2pm (adjustable as well as having manual override in the event of heavy hot water demand). To ensure enough solar power is available for other daytime-use items, it was recommended to reduce its element from 3.6kW to 1.8 kW, which I did. I also had to trim nearby trees to avoid shadows on the panels at least between 9am-3pm as recommended. The system operation was fully tested and is currently awating Ergon to change to Smart Meter.