While Electric Storage Hot Water is often viewed as more expensive to run than solar or gas, modern units have significantly improved their energy efficiency. In fact, many 491 series Rheem models now feature thicker insulation to minimize standby heat loss. In addition, you can further reduce your running costs by connecting your system to an off-peak tariff, such as T31 or T33 in Queensland. Furthermore, these tariffs allow the unit to heat water during periods of lower demand on the electrical grid at a reduced rate. As a result, you maintain a constant supply of hot water while keeping your monthly utility bills manageable. Moreover, these systems are easy to maintain, usually only requiring an anode change every few years to prolong the cylinder’s life.