Understand the limitations of solar water heating. The best systems are one third more economical when compared to energy efficient electric water heaters. Don't assume that early morning showers involve only cold water. The water in the tank should stay hot for at least 24 hours.
With the abundance of free solar energy that South Africa has, youngster Daniel von Eschwege from Bloemfontein has created an affordable solar geyser …
Never use an abrasive material to clean your solar panels. Doing so could cause them to become scratched and less useful than they were when they were installed. Your best bet is to have a gentle cleanser and cloth on hand to clean your panels so that you know that you have what you need when the time comes.
While it may seem that your solar panels are always affixed to your roof permanently, the best ones permit repositioning of the angles. Fixed angle panels are just not that efficient.