Monitoring Energy Use: A Worked Example of What It Reveals

Measuring consumption turns a bill into information. A calculation showing what monitoring identifies and what it saves.

Electricity bills report a total and explain nothing. Monitoring at circuit level identifies where consumption occurs, which is the only way to know what changing behaviour or equipment would actually save.

The situation

A household with a high electricity bill installs monitoring to understand consumption before deciding what to change.

Assumptions (illustrative)

• Annual electricity cost: assumed SAR 22,000.
• Assumed monitoring system cost: SAR 2,500 installed.
• Assumed distribution after monitoring: cooling 62 per cent, water heating 14 per cent, lighting 9 per cent, other 15 per cent.
• Assumed cost of servicing and correcting cooling equipment: SAR 4,000.
• Assumed cost of water heater timer and insulation: SAR 1,200.
• All figures are illustrative assumptions used to demonstrate the method.

Step 1: Identifying the dominant load

62 per cent of SAR 22,000 equals about SAR 13,640 for cooling.

Any saving effort should concentrate here, and without monitoring most households would not know the proportion.

Step 2: Finding the anomaly

Monitoring reveals one unit running continuously, consuming an estimated SAR 3,000 per year more than expected.

This is the type of finding monitoring produces: a specific fault that a bill total conceals entirely.

Step 3: Cost of correction

SAR 4,000 to service and correct the cooling equipment.

Addressing the identified fault rather than replacing equipment speculatively.

Step 4: Water heating

14 per cent equals about SAR 3,080, of which a timer and insulation might save a quarter, roughly SAR 770 per year, for SAR 1,200.

A smaller saving with a payback inside two years, identified because the proportion was visible.

Step 5: First year result

Assumed savings of about SAR 3,770 against costs of SAR 7,700 including the monitoring system.

The first year roughly breaks even, and the savings continue in subsequent years.

Step 6: Ongoing value

Monitoring continues to reveal anomalies, such as equipment degrading or a fault developing.

Its value is continuous detection rather than a one-off analysis, which is what distinguishes it from a single audit.

What changes the answer

• Where consumption is already efficient, monitoring identifies less and returns less.
• Larger properties with more equipment produce more findings.
• The savings depend on acting on what monitoring reveals, which is where most systems fail.
• Circuit level monitoring reveals far more than a single whole property meter.

What the numbers tell you

• Measure before changing anything, since intuition about consumption is frequently wrong.
• Concentrate effort on the dominant load, which in this climate is almost always cooling.
• Look for anomalies rather than only for totals, since faults hide inside averages.
• Monitoring only saves money if someone acts on what it shows.

Limits of this example

Every figure above is an illustrative assumption used to show the method, not a quote, valuation or market rate. Costs, rates, fees and regulations change and must be confirmed with the relevant authority, lender or supplier before you commit.

If you are deciding what technology your project or business actually needs, Domira can assess the options against the problems you are trying to solve rather than against feature lists.