Renewable Energy Grid Load Optimiser

The duck curve is deepening.
Know it 6 hours ahead.

REGLO detects midday overgeneration and evening ramp events on the UK grid before they happen — and pushes severity-graded alerts directly to your operations team.

Request free trial See how it works →
Live zone status — SSEN South · 13:04 UTC
Reading
0.93
Clear-sky index (Kt)
MED belly risk
Southampton
−214 MW
Net load surplus
CRIT — alert sent
Oxford
0.61
Clear-sky index (Kt)
LOW risk
Ramp forecast
+8.2 GW
18:00–21:00 UTC
Evening ramp
Hourly data pipeline · runs every 60 minutes
The problem

Solar is winning.
Grid balance is the battle.

The UK hit 23.8 GW of installed solar capacity in 2025. Every clear spring day is a balancing crisis waiting to happen.

Net load — SSEN South — clear April day
belly ramp 06:00 10:00 14:00 18:00 22:00
Midday overgeneration
Solar floods the grid during low-demand hours. Operators must curtail clean energy or risk instability — wasting generation that costs nothing to produce.
Steep evening ramp
As solar drops at sunset, demand surges. Grid operators must bring gigawatts online within hours — straining flexible generation and pushing prices skyward.
Reactive management costs
Without advance warning, operators pay premium balancing costs and risk curtailment penalties. A single avoided incident can be worth tens of thousands of pounds.
How it works

Satellite data in.
Actionable alerts out.

REGLO runs a continuous pipeline from Copernicus satellite feeds to your operations team — every hour, every zone.

01
Copernicus satellite pull
Hourly GHI irradiance, ERA5 wind speed, and C3S temperature data pulled via the CDS API. Free, open, European sovereign infrastructure.
CAMS · ERA5 · C3S
02
Duck curve engine
REGLO computes net load = demand − renewable generation per zone. It scores belly depth, ramp rate, and curtailment risk using the clear-sky index (Kt).
Belly · Ramp · Curtail
03
Severity scoring
Each event is classified LOW / MEDIUM / CRITICAL with a confidence percentage. Subscribers set their own severity threshold — no alert fatigue.
LOW · MED · CRIT
04
Alert dispatch
Alerts fire by email, SMS, or webhook directly into your SCADA system — hours before the event window. Every alert logged for accuracy auditing.
Email · SMS · Webhook
Phase 1 coverage
Starting where the duck curve bites hardest
REGLO launches on the UK's two highest solar-penetration zones before expanding to all 14 DNO licence areas.
SSEN South — Priority 1
WPD South West — Priority 1
UKPN East — Priority 2
Northern zones — Phase 2
Sample alert

What lands in
your inbox.

alerts@reglo.uk
From: REGLO Alert System <alerts@reglo.uk>
⚠ CRITICAL — Duck curve belly event · SSEN South · Today 11:00–16:00 UTC
Zone: SSEN South (central southern England)
Event type: BELLY — midday overgeneration
Window: 11:00 → 16:00 UTC today
Severity: CRITICAL · Confidence: 91%
Belly depth
−312 MW
Clear-sky index
Kt 0.94
Solar GHI peak
748 W/m²
Evening ramp
+8.4 GW
Recommended action: prepare fast-ramping generation or demand response for 18:00–21:00 UTC. Consider curtailment pre-positioning from 12:00 UTC.
Data source: CAMS Radiation Service · ERA5 · C3S
REGLO · reglo.uk · Unsubscribe · Manage alert preferences
Hours ahead, not minutes
REGLO uses a 5-day Copernicus forecast horizon. Critical events are flagged up to 6 hours before the window opens — enough time to pre-position generation and demand response.
Three event types
BELLY flags midday overgeneration. RAMP flags dangerous evening generation shortfalls. CURTAIL flags wasted renewable output. Each maps to a different operational action.
Your severity threshold
Set the minimum severity that triggers a notification. Critical-only for control rooms. Low + Medium for planning teams. Every subscriber configures their own preference.
Full audit trail
Every alert sent is logged with predicted metrics vs actual outcomes. Your operations team gets a monthly precision report showing forecast accuracy.
Why REGLO

Built for the UK grid.
Nothing else.

£0
Data cost
REGLO is built on Copernicus — free, open European satellite infrastructure. Competitors pay commercial weather APIs. Our marginal cost per new zone is near zero, and savings flow to you.
6h
Forecast horizon
CAMS provides a 5-day rolling forecast. REGLO processes it hourly and flags events 3–6 hours ahead of the window — well within the operational response window for UK DNOs.
14
UK DNO zones
The UK has 14 licensed distribution zones. REGLO is designed from the ground up around UK DNO geography, seasonal irradiance patterns, and the NESO demand baseline.
vs.
Not another dashboard
PLEXOS and Aurora cost £50,000+ per year and require dedicated modelling teams. REGLO is a notification service — no training, no implementation project, no consultant required.
↑
Improves over time
Every event builds the historical archive. Each spring season, the detection thresholds are recalibrated against NESO actuals — making the model sharper with every year of data.
API
SCADA-ready
Enterprise subscribers get webhook delivery directly into existing control systems. No middleware, no manual checking — the alert becomes part of your operational workflow.
Seasonal pattern
Duck curve risk peaks March–May
High solar irradiance meets low heating demand. REGLO alerts are most critical during the spring belly season.
Data provenance

Powered by
European sovereignty.

Every signal REGLO uses comes from open, auditable, publicly-funded infrastructure. No proprietary black boxes.

CAMS Radiation Service — GHI, GHI clear-sky, cloud fraction
ERA5 Reanalysis — wind speed & direction at 100 m hub height
C3S Climate Change Service — 2 m air temperature, HDD/CDD
Sentinel-2 Land Cover — solar asset siting & capacity mapping
NESO Half-hourly Generation — demand baseline & backtest ground truth
Copernicus Data Space — openEO API, STAC catalogue, Sentinel Hub
Pricing

Start free.
Scale as it earns its keep.

No enterprise sales process. No implementation project. Alerts in your inbox within days of signing up.

Free
£0
per month, forever
Get a feel for REGLO's accuracy before spending a penny. One zone, email only.
  • 1 zone monitored
  • Day-ahead forecasts only
  • Email alerts
  • LOW severity events
  • No historical archive
Request access
Most valuable
Pro
£799
per zone / month
The full alert service for operational grid teams. Covers your highest-risk zones with rolling 6-hour forecasts.
  • Up to 5 zones
  • 6-hour rolling forecasts
  • Email + SMS alerts
  • LOW / MED / CRIT severity
  • 90-day event archive
  • Monthly precision report
Request Pro trial
Enterprise
£2,500+
per month
Full UK coverage with direct SCADA integration and an SLA. Built for large DNOs and transmission operators.
  • All 14 UK zones
  • Hourly rolling forecasts
  • Webhook → SCADA
  • Full REST API access
  • Complete historical archive
  • Dedicated SLA + support
Contact us

Spring is peak belly season. Get ahead of it.

Join the free trial and receive live duck curve alerts for your zone through March–May.

No commitment · alerts by email · cancel any time