Home Electricity Audit – Answer Key

Summary

Grade faster and keep discussions grounded with a complete answer key for every section of the Home Electricity Audit. Includes sample responses for identifying bill components, explaining generation vs. delivery, and completing the cost-per-kWh math using a sample bill. The audit portion provides a model practice calculation plus guidance for evaluating realistic student assumptions and common gaps between estimates and actual bills (standby power, cycling appliances, seasonal shifts, and rate structures).

The analysis section includes a model “efficient appliance” response with savings and payback reasoning so you can quickly check whether conclusions are supported by clear math and evidence.

Quick-grade supports:

• Sample calculations (bill + device)
• Reflection sample answers
• Efficiency upgrade model response