Yes.
You can markedly reduce electric boosting by installing a timer or by manually switching it off in fine weather. This way you can prevent the electric booster kicking in at times when it is not appropriate (such as just before sunrise).
There are many other ways you can improve the perfomance of any hot water system, by building an insulated box around the cylinder, dropping the booster thermostat to 60 degrees (so that it does not cut in unnecessarily), by making sure your hot water pipes are insulated.
Go to Sustainable Living Tasmania’s website ( ) to see the many and varied ways you can save energy in your home.