Serbian households with dual-tariff electricity meters experience varying times for lower energy rates, impacting costs based on their location. The “cheaper” and “expensive” tariff system aims to balance energy demand, but the timing of the lower rate differs. Some regions receive the reduced tariff at 10 PM, while others don’t benefit until midnight, creating inconsistency. This discrepancy is due to the way the country is divided into zones for energy distribution. The system encourages off-peak energy consumption, potentially lowering bills for those who utilize appliances during designated cheaper hours. Residents are advised to understand their zone's specific schedule to optimize energy usage and reduce costs. This adjustment affects all households with dual-meter systems nationwide.