Portable Energy Logger — Built for Energy Auditors
Class 0.5S 3-phase energy + power quality logger that deploys in under 5 minutes via split-core CTs. Cloud-connected so audit data streams during the survey. The logger BEE-empanelled auditors, ESCOs, and global energy consultants ship to client sites.
The Logger Energy Auditors Actually Take to Site
Energy audits live or die on the quality of measurement. Most portable loggers in the auditor price band ship Class 1.0 accuracy — fine for trend visualisation, fatal for ISO 50001 baselines, ESCO performance contracts, and BEE-grade M&V. The Tech OVN portable energy logger ships Class 0.5S as standard, manufactured on the same production line as our utility-grade smart meters.
We don't do energy audits. We make the hardware audit firms ship to client sites — and we sell to BEE-empanelled auditors across India, plus ESCOs and energy consultants across the Middle East, Southeast Asia, Europe, and Africa. Cloud-connected logging means data streams during the survey; auditors can show findings on a tablet before leaving the site.
What the Logger Does
The capabilities that matter when the deliverable is an audit report — not a dashboard demo.
Deploy in Under 5 Minutes
Split-core CTs clamp around existing cables — no shutdown, no electrician, no permanent install. Auditors are taking readings within minutes of arrival.
Class 0.5S Accuracy
Utility-grade revenue accuracy (IEC 62053-22 Class 0.5S). Audit reports backed by Class 0.5S data hold up under M&V scrutiny — Class 1.0 portable loggers don't.
Power Quality Built In
Voltage, current, harmonics (THD + individual), unbalance, sags / swells, flicker. Compliant with IEC 61000-4-30 measurement methods. PQ surveys and energy audits with one device.
Cloud-Connected Out of the Box
Built-in WiFi + 4G. Audit data streams to the cloud during the survey — auditors review on a tablet at the site, generate reports before leaving.
Long-Duration Logging
On-device storage for multi-day surveys without cellular dependency. Configurable logging intervals down to 1 second for transient events.
Auditor-Friendly Reports
Built-in M&V report templates — energy consumption, demand profile, power factor, harmonic distortion, ECM baselines. Export to PDF / Excel / CSV.
Who Ships Tech OVN Loggers to Site
Our buyer is the consultant, ESCO, or in-house engineer running the audit — not the building owner.
BEE-Empanelled Energy Auditors
Independent energy auditors and energy audit firms running BEE-empanelled energy audits across India. Class 0.5S compliance is essential for EnMS / ISO 50001 audit deliverables.
ESCOs (Energy Service Companies)
ESCOs running performance contracts need pre- and post-installation M&V data. Portable loggers let one ESCO instrument multiple sites without permanent capex.
MEP & HVAC Consultants
Mechanical, electrical, plumbing and HVAC consultants verifying loads, sizing transformers, troubleshooting power factor, and validating commissioning.
Global Energy Consultants
International energy efficiency consultants operating across regions. Cloud-connected logging means client data is accessible without flying back to home office.
Industrial Plant Engineers
Plant engineering teams running internal energy audits, troubleshooting power quality issues, or validating utility bills against actual consumption.
Universities & Research Labs
Building science, energy research, and engineering programmes that need accurate, high-resolution electrical data for studies and student projects.
Logger Specifications
| Parameter | Specification |
|---|---|
| Channels | 3-phase 4-wire (1Φ + 3Φ configurable) |
| Voltage Range | Direct connect 110-480 V (line-to-line); higher via PT |
| Current Range | Split-core CTs — 5A, 100A, 200A, 600A, 1000A, 2000A, 3000A |
| Energy Accuracy | Class 0.5S (IEC 62053-22) |
| PQ Compliance | IEC 61000-4-30 measurement methods |
| Measurements | Active / reactive / apparent power & energy, demand, PF, voltage, current, frequency, harmonics (50th order), unbalance, sags / swells, flicker |
| Logging Interval | 1 sec to 60 min (user-configurable) |
| On-Device Storage | Multi-day survey capacity at typical intervals |
| Connectivity | WiFi (2.4 GHz) + 4G cellular + USB |
| Cloud Platform | Real-time streaming + offline sync to Tech OVN Energy Intelligence Platform |
| Output | PDF / Excel / CSV reports; raw data via API |
| Power | Mains-powered with battery backup for transients |
| Enclosure | Portable, IP rated for site use |
Why Auditors Choose Tech OVN
Four reasons the same loggers keep showing up in auditor toolkits across India and overseas.
Class 0.5S, Not Class 1.0
Most portable loggers in this price band are Class 1.0 — fine for trend visualisation, but not for revenue-grade M&V or ISO 50001 baseline-setting. Tech OVN ships Class 0.5S as standard, manufactured on the same line as our utility-grade smart meters.
Cloud-Connected by Default
Auditors no longer have to drive back, copy SD cards, and manually merge files. Data streams during the survey; reports can be generated and shared from the site.
Built by an Energy-Meter Manufacturer
OVN Engineers has been manufacturing energy meters in India since 1947. The portable logger is the same metering core, packaged for portability — not a third-party board in a branded enclosure.
Made in India, Shipped Worldwide
Manufactured at our 7.5-acre Delhi NCR facility and shipped to energy consultants across the Middle East, Southeast Asia, Europe, and Africa. Lower TCO than comparable European loggers.
From Site Survey to Permanent Programme
When clients move from one-off audits to continuous energy programmes, the same Titan platform supports permanent meters and a multi-site dashboard. Auditors can offer clients a longer-term measurement service without changing tools.
Frequently Asked Questions
Common questions about accuracy, ISO 50001 / IPMVP compatibility, CTs, and international supply.
Class 0.5S audit-grade logging, cloud-connected
Talk to our team about auditor pricing, multi-unit packages, and international shipping.