A witness on
every DB board.
TENA clips onto the DIN rail inside the distribution board, beside the breakers already protecting the property. From that one point it records every voltage, current, frequency, earth and surge event, timestamped and stored off-site as it happens.
Certified for years
on a live board.
TENA ships with the approvals needed for permanent installation on a live distribution board.
Made by ENERTHON
Everything here exists
to settle one argument.
The enclosure lifts away, then the board separates. Each module below answers a question that currently gets answered by guesswork.
Protection for your equipment.
Proof when you need it.
Six questions, answered continuously.
What was the supply doing?
Voltage, current, frequency and power factor logged continuously across all three phases.
Is the earth still sound?
Earth connection monitored at the board, not checked once at CoC inspection and never again.
Is anything still protecting you?
Surge arrester condition monitored directly, with alerts raised before it fails silently.
Exactly when did it happen?
Every event timestamped and stored off-site as it happens, so it cannot be quietly edited later.
Did the neighbours see it too?
Events compared across nearby sites, showing whether an event was on the wider network or local to one property.
What happens when power returns?
Restoration waits for a stable supply, and motors and compressors wait out a minimum restart delay.
What we are still building.
Higher-resolution detection
Faster identification of abnormal voltage behaviour within short grid cycles.
Enhanced protection logic
Configurable thresholds, faster response, and coordinated load disconnection.
Multi-site event correlation
Improved matching of surge events and grid disturbances recorded across neighbouring sites.
TENA cloud console
Where customers view their event history and download reports.
Enerthon: energy strategy, hardware engineering,
finance and regulatory expertise.
Ready to see it on your own site?
Commercial and body corporate sites can start with a 30-day site audit, credited in full if you buy. Homes: check availability in your area.