We have also replaced the handles. The last one had a knob style handle on it and it was completely annoying.
Here is our solar hot water system. We timed it today and it got full sun from 7.00am to 4.00pm (at least as we didnt check after that). So we are looking at at least 9 hours of full sun a day. Woohoo! It is electric boosted and we are now on off peak which we werent previously, David would have to physically switch our hot water on/off at the switchboard to save some money.