What an energy audit covers
An energy audit establishes how much energy a site uses, where it goes, and what can be done about it. The international standard, ISO 50002-1:2025, sets general requirements and principles for conducting energy audits for organisations of any size or sector, and the competence expected of auditors. ISO describes the outputs as the current energy use and performance, plus recommendations across operational controls, maintenance, modifications and capital projects.
Spot audit vs digital energy audit
A spot audit sees a few hours of a site’s life. It cannot see what happens at night, on a weekend, in a peak-hour window, or when the generator starts. A digital energy audit leaves IoT meters on the site for days, so the recommendations come from what the site actually did, ranked by how much each one is worth.
| Spot audit | Digital energy audit | |
|---|---|---|
| Measurement | A few hours of readings | Multi-day, continuous, IoT-instrumented |
| Sources | Often one main meter | Grid, generator and solar measured separately |
| Time of use | Rarely split | Peak and off-peak use separated |
| Recommendations | A standard list | Ranked by measured impact and return |
“Digital energy auditing replaces one-off spot-measurement audits with multi-day, IoT-instrumented audits that rank waste by measured impact and return.”— Engr. Reyyan Niaz Khan, founder, Wattey Energy (describing the method)
What a digital energy audit measures on a Pakistani site
Pakistani sites usually run on more than one source, so the audit has to separate them before it can rank anything.
- Grid, generator and solar, each metered separately, never blended.
- Grid use split into peak and off-peak hours (for LESCO and all ex-WAPDA companies, peak is 5–9 PM in winter and 7–11 PM in summer).
- Every generator run and the energy it supplied.
- Net energy (import minus export) for sites with solar.
- Meter and wiring errors that make the numbers wrong in the first place.
What measured data finds
Measured data finds problems a spot check cannot. On WattEY, the measurement layer behind our audits, reversed meter wiring was caught automatically on 6 meters (a meter showing negative power at night means a clamp is fitted backwards). A disputed dairy-farm bill was reconciled to 0.015% against the meter’s own lifetime reading; the mismatch was a billing-period difference, not a meter error. By September 2026 WattEY had tracked 517 generator runs.
How Wattey Energy audits
Wattey Energy audits with WattEY EMS on site and solar engineers who verify what the data shows. Where a site has solar, Wattey SPC inspects it string by string, so the audit covers generation as well as use. The result is a ranked list of fixes, each with its measured impact.
