Installed where
it matters most.
TENA mounts directly inside the home's distribution board — sitting on the same rail as the breakers already protecting the property.
Objective data for
electrical claims
in South Africa.
TENA is a cloud-connected platform for monitoring, validating and responding to power-quality events in real time — giving insurers, brokers and C&I clients the electrical event record they have never had.
Made by DOIGS GROUP and ENERTHON
Infrastructure-grade power quality intelligence.
TENA continuously records voltage, current, frequency, earth impedance, and surge protection device health — uploading timestamped data to a secure server in real time. Deployed across homes and commercial buildings in South Africa, TENA gives insurers and C&I clients objective evidence when grid events matter most.
- ✓ Real-time 3-phase monitoring across distributed sites
- ✓ Timestamped incident evidence for claims validation
- ✓ Earth impedance and SPD state-of-health monitoring
- ✓ Active protection response and future EMS / SCADA expansion
The housing clears.
Then the board comes apart.
Keep scrolling — the enclosure dismantles and lifts away first, leaving the bare board on its own. Then its modules separate to reveal the sensing, protection and connectivity hardware working inside every deployment.
Built for insurers and
operators alike.
What live deployments have revealed.
Four incidents from 15+ active sites. Not projections — real data.
Earth Impedance & SPD State of Health
Degraded earth impedance detected despite a valid CoC — SPD failure flagged before it occurred. Client remediated proactively, without a claim.
Generator Masking a Grid Event
During municipal powerline work, voltage dropped to 194V and frequency rose to 52.8Hz — a generator signature that would have appeared as a pure grid fault without the data.
Structural Phase Imbalance
L2 carrying 48% of total load against a 33% balanced norm — structural, not transient.
Five Devices, One Event
Five TENA devices across Kloof recorded the same voltage sag simultaneously — confirmed eThekwini network fault. One event record covers five sites.
* More details available under NDA
15+ sites across KZN and Gauteng.
TENA devices create a distributed view of grid-related power-quality events — distinguishing site-specific faults from wider feeder or municipal grid events.
Monitoring stack built for claims evidence.
Real-Time Power Quality
Voltage, current, frequency, and power factor — continuously logged across all three phases.
Earth Impedance
Continuous earth connection quality — not just at CoC inspection, but every day.
SPD State of Health
Direct monitoring of surge protection device condition with alerts before failure.
Timestamped Evidence
Every electrical event logged with precise timestamps — immutable, cloud-stored, report-ready.
Multi-Site Correlation
Compare events across sites in real time. Distinguish grid-wide faults from local failures.
Continuous Evolution
Higher-resolution detection, enhanced protection logic and lightning intelligence — always improving.
Built for insurers and operators alike.
- ◆Insurers: validate or deny electrical damage claims at desktop level before dispatching assessors.
- ◆Brokers: timestamped event data available at claim time, not weeks later.
- ◆C&I clients: identify phase imbalance and voltage sags before equipment fails.
- ◆Integrators: continuous earth and SPD compliance status across a portfolio.
From monitoring to optimisation.
Pricing on request — contact us to discuss deployment options.
MONITOR
Continuous logging, real-time alerts, timestamped reports, earth impedance and SPD monitoring.
PROTECT
Everything in Monitor, plus active load disconnection during defined grid events.
OPTIMISE
Everything in Protect, plus phase balancing analysis, NMD management, and optimisation reporting.
Continuous platform evolution.
Higher-resolution detection
Faster identification of abnormal voltage behaviour within short grid cycles.
Enhanced protection logic
Configurable thresholds, faster response logic, and coordinated load disconnection.
Lightning intelligence
Improved correlation between surge events, grid disturbances, and equipment damage.
TENA cloud console
Access monitoring, alerts, and operational workflows.
Engineering and insurance expertise.
Reece Doig
Partner & Founder — Doigs Group (South Africa). Leads TENA hardware and software architecture.
Kirill Popov
Partner & Co-Founder — Enerthon Ltd. Leads IP, regulatory strategy, and governance.
Dmitri Ramzaitsev
Partner & Co-Founder — Enerthon Ltd. Leads commercial growth and insurance market expansion.
Grearson Gifford
Project Mentor — IBIS. Insurance-assessment expertise and claims context for pilot evidence.
Request a pilot conversation.
Pilot slots are limited. If you handle electrical claims, risk management, or portfolio underwriting in South Africa, we would welcome a short conversation.
enquiries@tena.energy
support@tena.energy
+27 74 549 0947
75 Lewis Drive, Amanzimtoti, KwaZulu-Natal