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VIABILITY ENGINE
Octary Viability Engine

Assess renewable project
viability in minutes

Location-based scoring across grid access, wholesale markets, CfD policy, competition, and costs — powered by live NESO, Elexon BMRS, and Ofgem data.

🔌 30%
Grid Access Score
Queue length, congestion & connection delays from NESO post-reform pipeline (382 GW, 1,847 projects)
📈 20%
Market Score
Wholesale pricing trends, resource quality (irradiance / wind speed), volatility from Elexon BMRS
📋 15%
Policy Score
CfD strike prices AR1–AR7, pipeline alignment with Clean Power 2030 targets
🏭 15%
Competition Score
Regional saturation and technology oversupply vs NESO target ranges
💷 20%
Cost Score
TNUoS charges (rising 60%+ Apr 2026), DUoS, CAPEX benchmarks, connection cost estimates

UK Connection Pipeline Post-Reform

NESO Gate 2 results · February 2026 · 382 GW across 1,847 projects
New Assessment
Project Configuration
Enter project details to generate a viability assessment across all five scoring modules.

📍 Location

Enter postcode or select region

⚡ Project Details

Technology type and capacity
1 MW50 MW1,000 MW
Wind Speedm/s avg
IrradiancekWh/m²/yr
TNUoS Gen£/kW/yr
Wholesale Avg£/MWh
Avg Delaymonths
Assessment Results
— MW — · —
Overall Viability

Scoring Formula

Radar Profile

Key Insights

Module Deep Dive
🔌 Grid Access Analysis
Post-reform connection pipeline · NESO Gate 2 · 382 GW across 14 transmission zones
382 GWTotal Pipeline283 GW gen + 99 GW demand
132 GWPhase 1Connect by 2030
151 GWPhase 2Connect by 2035
1,847ProjectsGate 2 retained

Congestion by Region

Lower congestion = better grid access score — sorted best to worst

Regional Grid Data

Queue length, delays, and congestion by transmission zone
Module Deep Dive
📈 Wholesale Market Analysis
GB day-ahead prices and resource quality by region · Elexon BMRS & EPEX

Wholesale Price Trend

GB day-ahead average · £/MWh · Jul 2025 – Mar 2026

Resource Quality by Region

Price Volatility

Intraday spread · monthly average — higher = better for BESS
Module Deep Dive
📋 CfD Policy & Subsidy Tracker
Allocation Rounds AR1–AR7 · Strike prices in 2012 prices · 14.7 GW secured in AR7
14.7 GWAR7 Total Secured
£65.23/MWhAR7 Solar Strike
£91.20/MWhAR7 Offshore Strike

CfD Strike Price History

2012 prices · £/MWh · AR1 (2015) to AR7 (2026)

CfD Allocation Rounds Data

Pipeline vs Clean Power 2030 Targets

Regional Explorer
🗺 UK Regional Analysis
Compare viability scores for a 50 MW reference project across all GB transmission zones

Solar Viability Heatmap

Viability score for 50 MW reference project — sorted highest to lowest
Comparison Tool
⊞ Multi-Site / Multi-Tech Comparison
Compare up to 4 project configurations side by side across all five scoring modules

Score Comparison — Radar

Risk Monitor
⚠ UK-Wide Risk Flags
Automated detection of grid, market, cost and competition risks across all 14 regions
High Severity
Medium Severity
Clean Regions

Active Risk Flags

Documentation
📖 Scoring Methodology
How the Viability Engine calculates scores across five weighted modules

Viability Score Formula

V = (0.30 × G) + (0.20 × M) + (0.15 × P) + (0.15 × C) + (0.20 × K)
G Grid Access Score 30%

Evaluates connection queue length (GW), average delay (months), and regional congestion from NESO post-reform pipeline data. Higher congestion and longer queues reduce the score.

M Market Score 20%

Assesses wholesale price levels (£/MWh), resource quality (wind speed or solar irradiance), and price volatility. BESS projects receive a volatility bonus as higher volatility increases arbitrage revenue.

P Policy Score 15%

Considers CfD support levels, latest allocation round results (AR7 — 14.7 GW), and alignment with Clean Power 2030 targets. Technologies undersupplied against CP30 targets score higher.

C Competition Score 15%

Measures regional saturation and technology pipeline oversupply. BESS uses a dedicated saturation index. Oversupplied technologies receive penalties.

K Cost Score 20%

Factors in TNUoS generation charges (£/kW), technology-specific CAPEX benchmarks (£m/MW), total project CAPEX, and estimated connection costs based on regional delay patterns.

Data Sources

NESO TEC Register Grid connection pipeline, queue data, Gate 2 reform results
Elexon BMRS Wholesale prices, system prices, settlement data
LCCC CfD allocation rounds AR1–AR7, strike prices, contract data
Ofgem TNUoS / DUoS / BSUoS charges, regulatory frameworks
Carbon Intensity API Real-time generation mix and carbon intensity
DESNZ Clean Power 2030 targets, policy frameworks, NSIP guidance

Scoring Grade Scale

80–100
Excellent
Strong viability across most or all modules
65–79
Good
Generally favourable with minor challenges
50–64
Moderate
Mixed signals — some modules strong, others weak
35–49
Challenging
Significant barriers in one or more areas
0–34
Poor
Major obstacles — project unlikely viable without mitigation

CAPEX Benchmarks & Technology Assumptions

TechnologyCAPEX (£m/MW)Typical Load FactorCfD AR7 StrikePipeline StatusCP30 Target
Solar PV0.5210–12%£65.23/MWhOversupplied35 GW
Onshore Wind1.1526–30%£72.24/MWhAt Capacity25 GW
Offshore Wind2.8538–45%£91.20/MWhUndersupplied50 GW
BESS (2hr)0.38N/ANo CfDOversupplied20 GW