Energy Audits
Energy audits evidenced by measurement at your own boards
Orijtech installs instrumentation at your boards and feeders, logs it through a full operating cycle, and writes the findings from that record — so every statement in the report points back to a reading somebody can check. Scope is set per facility. There is no fixed package.
The questions an audit has to answer
These are the questions a board, a bursar, an accounting officer or a plant manager actually asks. Each one is answered in the report from measured data, with the reading it came from named.
How loaded is the transformer, really?
Measured loading against installed capacity, over a full operating cycle — the number you need before adding a production line, a chiller, a new wing or an EV charging bay.
Which hours are costing the money?
Consumption split across off-peak, shoulder and peak bands, so the tariff structure stops being an abstraction and becomes a schedule you can change.
What is running when nobody is here?
Night and weekend baseload measured load by load. In most facilities this is the single largest recoverable figure, and it is invisible on a monthly bill.
Is power factor adding to the bill?
Power factor measured at the incomer and at the heavy motor loads that drive it, with the correction case quantified from the readings.
Which department, block or tenant is responsible?
Cost attributed to the part of the organisation that generates it. Without that, energy stays a central overhead nobody owns and no reduction target sticks.
Does the bill match the meter?
Independent measurement reconciled against billed consumption and demand, so a billing discrepancy can be demonstrated with figures.
The method
Five stages. Stage 3, the measurement campaign, is where the evidence for every finding comes from, and it is the stage procurement documents most often leave unspecified.
Stage 1
Scoping and document review
We agree what the audit is for — a cost reduction target, a capacity decision, a budget submission, a board instruction, a lender or grant requirement — because that determines what has to be measured. We review single-line diagrams, panel schedules, the supply agreement, recent utility bills, and any existing metering.
Output: a written scope and measurement plan for your approval, before any cost is committed.
Stage 2
Site survey and electrical walk-down
An engineer walks the installation: transformer and power rooms, LV panels, distribution boards, plant and compressor rooms, chiller plants, floor risers, UPS and server rooms, production areas, tenant boards, solar inverter rooms and generator sets. We record nameplate data, conductor and busbar sizes for sensor fitment, and the isolation windows each measurement point will need.
Output: measurement points, the meter tier for each, gateway count, and the isolation schedule.
Stage 3
Measurement campaign
Three-phase meters are installed at the agreed points and logged continuously. Each three-phase meter uses three current sensors, with sensor orientation and phase mapping verified at power-up. Data refreshes every five seconds and is stored at one-minute intervals, so the audit works from interval data rather than monthly totals.
The measurement period is set to cover at least one full operating cycle — shift pattern, occupancy pattern, or production run. A week that misses a shutdown, a peak production run or a weekend gives findings that do not hold across the year.
Output: a validated interval data set per measurement point, and a 24-hour data-integrity check before the campaign is accepted as clean.
Stage 4
Analysis
Load profiles, time-of-use distribution, baseload, transformer loading against installed capacity, phase balance, power factor behaviour, and demand events. Measured consumption is reconciled against billed consumption. Every data-cleaning assumption is written into the report.
Output: findings separated from recommendations, each traceable to a meter and a period.
Stage 5
Report, presentation and verification
The audit report is issued and walked through with your team. Where measures are implemented, the same measurement points can be re-read afterwards, so the saving is verified against the audit baseline instead of estimated a second time.
Output: the deliverables listed below, and an agreed list of what to measure next.
Deliverables you can write into a procurement requirement
Every item below is a named document or data set with defined contents. Copy them into your tender or terms of reference and hold any bidder — including us — to them.
| Deliverable | Contents |
|---|---|
| Scope and measurement plan | Audit objective, boundary, every measurement point with its meter tier and reason, gateway count and siting, required isolation windows, measurement duration, and all stated assumptions. Issued and approved before installation. |
| Site survey record | Surveyed boards and feeders, nameplate and rating data, conductor or busbar dimensions confirming sensor fitment, observed condition, and any safety or access constraint found on site. |
| Measured data set | Interval data at one-minute resolution for every measurement point across the full campaign, with meter identifiers and an as-installed record linking each meter serial number to its point. Exportable — the data is yours. |
| Energy audit report | Ten defined sections, listed in full below. Facts are separated from recommendations throughout, and no saving is claimed that the measured data does not support. |
| Recommendation register | Each recommended measure with the affected load, the evidence reference in the data set, whether it is an operational change or a capital item, and the measurement that will confirm whether it worked. |
| Management presentation | A one-page executive summary and a walkthrough session for the people who have to approve the actions — finance, operations, estates, engineering. |
| Verification re-measurement | Optional and scoped separately. The same points re-read after implementation and compared against the audit baseline, so the saving is reported as a measurement. |
The report itself
The report carries the same ten sections every time
The structure does not change between a hotel, a factory, a hospital and a ministry, which is what lets an evaluation committee compare one audit report against another on the same headings.
01
Executive summary
Total consumption, total cost where tariff data is available, the peak / shoulder / off-peak split, the major observations, the risks, and the recommended actions. Written to be read by a finance or executive audience without the rest of the document.
02
Scope of monitoring
Exactly what was measured and what was not: which transformers, buildings, floors, feeders, production lines, chillers, boilers, compressors, UPS units and solar or generator sources were covered.
03
Data sources and assumptions
Platform, reporting period, meter names, currency, tariff assumptions, any missing or incomplete data, any meter limitation, and every data-cleaning assumption applied. Nothing is inferred silently.
04
Overall consumption summary
Total energy in kWh, estimated total cost, average daily consumption, maximum demand in kW or kVA, and the exact reporting period.
05
Time-of-use analysis
Consumption and cost split across off-peak, shoulder and peak bands, as a table and as a chart, with each band shown as a percentage of total.
06
Key observations
Findings stated as facts: where consumption concentrates, whether night-time baseload is higher than the operation justifies, how transformer loading compares with installed capacity, whether weekend consumption is explained, where abnormal spikes sit, and what power factor is doing.
07
Financial impact
Cost contribution by period and by load, the cost of the inefficiencies identified, and the estimated effect of load shifting or baseload reduction. Estimates are shown as estimates, with the assumptions beside them.
08
Operational recommendations
Practical actions tied to specific loads and schedules — not general advice. Each is written so a facilities or engineering team can act on it without a follow-up meeting.
09
Additional monitoring recommendations
Where the audit shows that a significant part of the facility is still unmetered at load level, the report names those loads and states what monitoring them would reveal.
10
Conclusion
A clear statement of what the measured data supports, and what the next level of value requires.
What gets measured
Continuous logging at every agreed measurement point, for the full duration of the campaign. No parameter here is a spot reading taken on the day of the visit.
- Voltage and current
- Per-phase voltage and current, phase loading, phase imbalance
- Power
- Active power (kW), reactive power (kVAr), apparent power (kVA)
- Energy
- Energy consumption (kWh), cumulative and by interval
- Quality
- Power factor, supply frequency
- Behaviour
- Load profile, time-based consumption, demand behaviour
Instrumentation and accuracy
The specification a technical evaluator will want to see.
- Accuracy. Class 0.5 (±0.5%, IEC 62053-21) on split-core current transformer points; Class 1 (<1% above 5A, IEC 62053-22) on Rogowski coil points used for transformers and main incomers.
- Resolution. Readings refresh every 5 seconds and are stored at 1-minute intervals.
- Sensing. Every three-phase meter uses three current sensors. Sensor sizing follows the measured current at the point — up to 100A, 600A, 1000A or 2000A per phase — and final sizing is confirmed on site.
- Traceability. Every unit carries a unique serial number, recorded against the client, site, measurement point and installation date in the as-installed record.
Scope is set per facility
A single-transformer office block and a two-plant dairy do not need the same audit, and pricing either from a published package would mean charging one of them for work they do not need.
So we do not publish an audit price. The scoping stage produces a written measurement plan; the quotation follows it, line by line, and you approve both before anything is installed. Where an audit is being procured competitively, we will supply the scope in a format that can be issued to other bidders.
If your organisation is working towards ISO 50001, an energy audit produces the measured energy review and baseline such a programme is built on. Orijtech Energy is not a certification body and does not issue certification.
What we need from you
Stated up front, because an audit that stalls waiting for site access costs both sides.
- Safe access to electrical rooms, distribution boards and plant areas for the survey and installation team.
- Agreed isolation or shutdown windows. Brief planned isolations are required at each measurement point to fit current sensors and voltage taps.
- A gateway mounting point with power and reliable cellular coverage at each physical monitoring location.
- Access to generators and fuel tanks where these are inside the audit scope.
- Recent utility bills and the supply agreement, so that measured consumption can be reconciled against what is billed.
- A nominated engineering representative to witness commissioning and sign off the as-installed record.
One of three service lines
The metering an audit installs does not have to come out when the audit ends. Left in place it becomes permanent monitoring, and the load profile it recorded is the same one a solar system would be sized against.
Start with a written measurement plan
Tell us what decision the audit has to support. We will come back with the plan and the scope, which you can review, share internally, or issue to other bidders. The quotation follows the approved scope.
Discuss an audit scopeRead our written work before you speak to us
A full monthly report with the client removed and the figures illustrative: the band split, cost by metered area, the load profile, the demand event that set the charge, the actions, and last month’s actions with their measured outcome.
PDF · 6 pages · 300 KB