We ran a 7-day home energy audit on a typical 2,000 sq ft suburban home using a Sense energy monitor on the breaker panel and a Kill-A-Watt on plug loads. The audit identified 12 specific waste sources totaling $43 a month of supply-side cost. Total fixes took 4 hours and $180 in equipment. Annual savings: $516. Here is the methodology, the 12 findings, and the 1-hour fixes you can do this weekend.
The 7-day audit methodology
Install a Sense energy monitor on the breaker panel. Sense identifies individual appliances by their power signature and tracks kWh per device over time. Most full-home installs deliver 60 to 75 percent device identification within 7 days.
Use a Kill-A-Watt meter on every plug load that draws more than trivial standby. Plug the meter between the wall and the device for 24 to 48 hours. Note continuous draw, peak draw, and total kWh.
The 12 specific findings
Finding 1: failing refrigerator drawing 220 kWh a month (vs the 50 to 60 kWh of a working ENERGY STAR unit). $14 a month waste.
Findings 2 to 4: phantom loads on entertainment cluster, kitchen counter appliances, and home office. Combined $11 a month.
Findings 5 to 7: incandescent bulbs in three rarely-touched lighting circuits, totaling 12 bulbs at 60W each running roughly 1 hour a day. Swap to 9W LEDs: $4 a month saved.
Findings 8 to 12: oversized old AC running too cool during day, electric resistance towel rail on continuous, three always-on chargers, an old laser printer in standby, and a beer fridge in the garage. Combined $14 a month.
The 1-hour fix list
Replace the failing fridge: 11-month payback. The other 11 findings are smaller dollar but trivially fixable. A $25 smart power strip cuts the entertainment cluster phantom. LED swap costs $24 total. Towel rail goes on a $15 timer.
Total fix cost: $180 (fridge $0 since waiting on a replacement deal, smart strip $25, timer $15, LEDs $24, plus 4 hours of labor). Annual savings: $516. Net first-year ROI: $336.
Lock the rate before the next reset.
Seenra runs the supplier shortlist in 5 minutes. No credit pull, no on-site visit, no service interruption. Forever free for households.
Get my fixed-rate quote →Common questions
Quick answers from the editorial desk
How much does a Sense energy monitor cost?
Is a professional energy audit worth the cost?
Can I do a weekend audit without buying equipment?
Do utilities offer free audit programs?
Further reading