Sending solar or wind power you generate back to the grid for little to no credit???? You are wasting thousands of dollars. Immersun sends all that wasted energy into your water heater. So simple so affordable.
Quick update on this post. AWS have now released the SunnyMate that replaced the Immersun in Janurary 2015. If you have an Immersun Warranty claim and are having trouble getting an answer from Immersun we will support all AUS and NZ customers and provide a free SunnyMate (subject to conditions). call 1300 736 458. (SunnyMate is an Australian regaistered product of the AWS Brand)