Energy Star节能计算器
使用Energy Star节能计算器比较能效认证电器与普通电器的能耗差异。计算升级到Energy Star产品后每年可节省的kWh电量和电费，评估投资回报。
年储蓄额
22.50 USD
Annual Savings vs Electricity Rate
公式
How to Calculate Energy Star Savings
Energy Star certified products meet strict energy efficiency guidelines set by the EPA.
Formula
Annual Savings = (Standard kWh - Energy Star kWh) * Rate
Lifetime Savings = Annual Savings * Lifespan
Typical Energy Star Savings
计算示例
An Energy Star refrigerator using 350 kWh/year vs standard at 500 kWh/year over 12 years at $0.15/kWh.
- 01Energy saved: 500 - 350 = 150 kWh/year
- 02Annual savings: 150 * $0.15 = $22.50
- 03Lifetime savings: $22.50 * 12 = $270
- 04Energy reduction: 150 / 500 * 100 = 30%
常见问题
What does Energy Star mean?
Energy Star is a government-backed certification indicating a product meets strict energy efficiency standards. Products must be 15-30% more efficient than non-certified models.
Is the Energy Star premium worth it?
Usually yes. The extra upfront cost of $50-200 is typically recovered in 1-3 years through energy savings, and you continue saving for the remaining appliance life.
Which Energy Star appliances save the most?
HVAC systems, water heaters, and clothes washers offer the largest absolute savings due to high energy use. Percentage-wise, LED bulbs and clothes washers see the biggest efficiency gains.