Get the capacity your lines already have.

A static rating assumes the worst weather all year, every year. LineClarity rates each circuit against the weather that is actually there — a new number every hour, signed, that your systems pull, with automatic fail-safe to your own static rating.

Measured across 14 GB transmission nodes: a median 17% more capacity at winter peak, and 45% in the windy hours when constraints bind.

Live hourly rating, fresh for 15 minutes · IEEE-738 physics, every span · Signed and verifiable · Pull-only, no inbound access · No sensors or site visits

See it on a live line Integration guide

£1.7bnGB thermal constraint costs, 2024/25 — up 64% in one year (NESO)

13.5 TWhcurtailed to thermal constraints in 2024/25 — up 81% (NESO)

~£8bnwhere NESO projects balancing costs peak by 2030

Constraints bind when it is windy, and wind is what cools a conductor — so the extra capacity turns up in the hours the system is short of it. It runs the other way too: for roughly 280 hours a year the safe limit sits below a seasonal static rating. The numbers, node by node.

Live rating

IEEE-738 physics on live weather, signed by the same key that signs a customer feed. A customer's circuit is re-rated every hour and the record stays fresh for fifteen minutes; poll it as often as your systems like.

Ready. Results appear here, with the signature checked in your browser.

Rated span by span

IEEE-738 heat balance along the whole route, with the wind's angle to the conductor. The circuit is limited by its worst span.

Above static, and below it

Normally above your static rating. Lower in the rare hours when the weather is worse than that rating assumes, and flagged when it is.

Fail-safe

Late, missing or unverified, your system falls back to your static rating. The hard cap is enforced on both sides.

One circuit or a whole fleet

There is nothing to install, so the second circuit costs what the fiftieth does: the time it takes to type in its conductor, its two ends and its voltage.

No sensors, no site visits, no outage. Adding a circuit is a form, not a project. Nothing is fitted to a conductor and nobody climbs a tower.
One engine, any number of circuits. The same service rates one circuit or five hundred. Your side is one HTTPS request per circuit per poll, into the systems you already run.
Priced per circuit per year. No capital cost and no installation cost, so the business case is the constraint saving against a subscription — not against a build.
Start with one, on paper. Take the last twelve months of recorded weather over one named circuit and replay it hour by hour: what it would have carried, and when. Weather that already happened, so nothing is being predicted. No operational connection, nothing for the OT side to review.

Get a free study on one circuit See what we measured

Putting it to work

One stable ID per circuit, one URL, eight output formats including PI Web API and CIM. Your team gets a dashboard, per-person circuit access with end dates, and a full audit trail.

Integration guide Security and access

Talk to us

Name one circuit — conductor, both ends, voltage — and we will send you two things, free. What it is carrying right now and for the next 48 hours, from live weather. And what it would have carried over the last twelve months, replayed hour by hour from weather that has already happened — a look backwards, not a forecast, so you can size the prize before connecting anything. Both come with the method, so your own engineers can check them. Nothing to install and no operational connection. A person replies, usually the same day.