Understanding Kilowatt-Hours and Energy Consumption

The video explains the concept of kilowatt-hours, a unit of energy measurement used in electricity billing. It distinguishes between power (measured in watts) and energy (measured in kilowatt-hours), using a car analogy to clarify the difference. The video provides examples of energy consumption and costs, emphasizing the importance of energy efficiency and offering practical tips for reducing electricity usage.

What is the main focus of the Enphase homeowner video series?

• Learning about home security systems

• Explaining kilowatt-hours and energy consumption

• Understanding solar panel installation

• Discussing water conservation techniques

What does a watt measure?

• The amount of energy stored

• The instantaneous electrical power used

• The total energy consumed over time

• The cost of electricity per hour

How is a kilowatt defined?

• 500 watts

• 100 watts

• 10,000 watts

• 1,000 watts

In the car analogy, what does speed represent?

• The power or rate of energy consumption

• The total travel time

• The distance traveled

• The fuel efficiency

What is the equivalent of distance in the car analogy?

• Power

• Speed

• Fuel

• Energy

How much energy is used if 10 100-watt bulbs are burned for one hour?

• 1 kilowatt-hour

• 10 kilowatt-hours

• 100 kilowatt-hours

• 0.1 kilowatt-hour

What would be the annual cost of leaving a 100-watt bulb on every workday at 25 cents per kilowatt-hour?

• $65

• $25

• $50

• $100

Why is it important to turn off lights before leaving the house?

• To save on water bills

• To reduce energy consumption and costs

• To increase bulb lifespan

• To prevent overheating

What is the utility company charging you for on your electricity bill?

• The peak power usage

• The number of appliances used

• The total power capacity

• The energy consumed in kilowatt-hours

What is a recommended action to reduce energy costs?

• Switch to low-wattage LED bulbs

• Increase the number of appliances

• Leave lights on during the day

• Use high-wattage bulbs