Find Where Your Energy Is Escaping — and Stop It

Electricity bills are a symptom. The causes of high consumption are distributed across dozens of circuits, hundreds of devices, and years of incremental additions to an electrical installation that was never designed for its current load. A Starwatt energy efficiency audit treats the bill as a starting point and traces the consumption back to its sources — using metered data, thermal imaging, power quality analysis, and equipment inventories to build a precise picture of where each kilowatt-hour is going.

We work with residential clients managing unexpected bill increases and commercial operators looking to reduce overheads, meet sustainability reporting commitments, or qualify for green building ratings. The output of every audit is a ranked list of efficiency measures with implementation cost, projected annual saving, and simple payback period — so every recommendation can be evaluated as a business decision, not just an environmental aspiration.

Load Profiling and Circuit-Level Metering

Aggregate consumption from a smart meter tells you how much energy you are using — but not where it is going. Starwatt installs temporary sub-circuit metering across the switchboard to capture load data at circuit level over a representative monitoring period, typically five to fourteen days. This data reveals the consumption signature of every major load in the building: HVAC ramp-up profiles, refrigeration cycling patterns, lighting schedules, and the persistent baseline drawn by standby and always-on equipment. Load profiling frequently reveals that 20–40% of total consumption occurs outside business hours when most systems should be powered down.

• Circuit-level sub-metering installed across the full switchboard for monitoring period
• Fifteen-minute interval data captured for time-of-use analysis
• Load factor and demand profile analysis to identify tariff optimisation opportunities
• Identification of circuits with abnormally high base load suggesting equipment faults
• After-hours consumption baseline established to quantify standby and parasitic loads

Power Factor Assessment and Correction

Power factor — the ratio of real power consumed to apparent power drawn from the network — is a measure of how efficiently an electrical installation converts supply current into useful work. Motor loads such as air conditioning compressors, refrigeration plant, lifts, and industrial machinery typically generate lagging power factor in the 0.7–0.85 range without correction. A facility operating at 0.75 power factor is drawing 33% more current from the network than its actual consumption requires, resulting in higher maximum demand charges and increased resistive losses in switchboard and cable infrastructure. Starwatt measures power factor across all three phases under representative load conditions and designs power factor correction capacitor banks where the economic case is justified.

Standby Load Identification and Elimination

Standby consumption — the electricity drawn by equipment in sleep, idle, or off-but-plugged-in states — is frequently the largest single efficiency opportunity in office and retail environments. A medium-sized office with 50 workstations, each drawing 15–25 watts in standby across weekends and overnight, contributes 1,000–2,000 watt-hours of consumption for every off-peak hour. Starwatt maps standby loads using circuit-level data and spot measurements, then specifies switched outlet timers, master-slave outlet strips, and building management system integration to cut standby consumption to near zero outside business hours.

• Spot measurement of standby consumption at individual outlet and circuit level
• Identification of devices drawing standby power above their rated standby specification — a sign of aging or failing components
• Switched outlet timers and master-slave power boards to enforce after-hours de-energisation
• Building management system (BMS) programming adjustments to tighten HVAC and lighting shutdown schedules
• Staff behaviour recommendations backed by quantified potential saving

Lighting Efficiency and LED Upgrade Assessment

Lighting typically accounts for 20–40% of commercial electricity consumption and is the single easiest efficiency measure to quantify and implement. Starwatt measures installed lighting wattage against maintained illuminance levels, calculates the energy intensity in watts per square metre, and compares it to current best-practice LED benchmarks. Where legacy fluorescent, metal halide, or halogen sources remain in service, the replacement cost and payback period are calculated against actual operating hours recorded from the load data — not assumed hours. LED upgrades are often the fastest-payback measure in the audit report, with simple payback periods of two to four years and product lifespans that deliver savings for a decade or more.

Tariff Structure Review and Demand Management

Many commercial and industrial sites are on tariff structures that include a maximum demand charge — a monthly fee based on the highest 15 or 30-minute average demand recorded by the meter in that billing period. A single day in which all HVAC units, production equipment, and lighting are running simultaneously at peak can set the maximum demand for the entire month. Starwatt reviews tariff structure against the load profile data to identify whether the current tariff is appropriate, whether load-shifting or demand-response measures could reduce peak demand, and whether a tariff renegotiation with the retailer is warranted. In some cases, tariff optimisation alone reduces the annual bill by 8–12% without any change to equipment or consumption.