Work Streams
Three parallel tracks to deliver the V2G pilot
Key Terms You'll See Below
See the Glossary for a complete list of technical terms.
Financial Modelling
Skyprospector Setup
Timeline
- Month 1Skyprospector configured with site data
- Month 2Business model refinement
- Month 3Financial projections validated
Shadow Billing & Scenario Simulation
Skyprospector doesn't just project — it compares. During the pilot, Flux will optimise against your chosen price source while Skyprospector simultaneously calculates what costs would have been under alternative tariffs. This "shadow billing" shows the real value of optimisation against multiple scenarios.
| Simtricity | Tellus |
|---|---|
| Setup Skyprospector modelling instance | Validate and sign off provided numbers |
| Collaborate on business model finalisation | Provide Letter of Authority for site meter data access, or 12 months of electricity bills |
| Configure shadow tariff scenarios | Specify alternative tariffs to model (e.g. Octopus Business tariffs) |
| Provide Skyprospector login access | Review actual vs shadow billing reports |
| Model static battery scenarios if required | Provide battery specifications if exploring |
- Financial model with projected revenues and savings
- 12-month Skyprospector subscription for ongoing actual vs shadow comparison, with simulation data export
- Scenario analysis including static battery options
Skyprospector is open source — available at github.com/cepro/skypro for long-term self-hosted use beyond the subscription period.
Metering Setup
COP11 Asset Meter Accreditation
Timeline
- Month 1Meter installed and data flowing
- Month 2COP11 accreditation complete
- Month 3Ongoing data validation
Why Does Metering Matter?
To get paid for flexibility services, you need proof of what energy was delivered. The UK electricity market requires meters to be accredited to industry standards (COP11) and registered with Elexon before any market payments can flow. This workstream sets up the "evidence chain" that proves your V2G chargers delivered what was promised.
How Meter Data Flows to Market
Accurate, accredited meter data is the foundation of all market revenue
| Simtricity | Tellus |
|---|---|
| Specify meter requirements and installation location | Install one Emlite EMP1.cx meter per charger array at pilot site (optional per-charger data via Tellus API for breakdown visualisation) |
| Load meter data into Simtricity Flows | Secure Export MPAN (tracks energy sent to grid) for pilot site |
| Accredit meter for COP11 with Elexon | Provide HHDC feed (half-hourly readings) from Import MPAN |
Practical Timelines
- Export MPAN: 1–4 weeks via DNO (plan for 4 weeks). The key first step is securing a Letter of Authority from the site client — Simtricity will then assist with DNO negotiation.
- Running in parallel: Dispatch testing can begin before the Export MPAN is secured. Revenue starts flowing once the MPAN is active.
V2G Market Dispatch
Wholesale Revenue via Axle
Timeline
- Month 1Charger API integration development
- Month 2Axle integration live, first dispatch events
- Month 3Full operation, revenue validation
What is "Dispatch"?
Dispatch is when Axle Energy sends a signal telling your charger to do something — charge, discharge, or hold. These signals are based on wholesale electricity prices: when power is expensive, you discharge and earn money; when it's cheap, you charge. The Flux controller translates these market signals into actual commands for your Tellus chargers.
The Dispatch Cycle
Charger Control & Operational Boundaries
Flux directly actuates Tellus chargers via API, with configurable control modes that we will enhance as needed for the pilot.
What Flux Controls
Priority System
Driver needs always win. If a customer initiates charging or has a scheduled departure, Flux pauses market dispatch.
Conflict Handling
- • Driver initiates charge → dispatch paused
- • Vehicle SoC too low → discharge blocked
- • Scheduled departure → vehicle ready by time
Edge Case Behaviour
- • Vehicle unplugged → graceful session end
- • SoC limits reached → automatic mode transition
- • Communication lost → safe fallback state
| Simtricity | Tellus |
|---|---|
| Integrate Tellus charger API with Flux controller | Install charger(s) at pilot site |
| Configure priority system and control modes | Provide SoC levels via charger API |
| Provide Axle integration under existing contract | Provide API access credentials |
| Pay 100% of Axle flex revenues to Tellus during pilot | Connect V2G-capable vehicle(s) |
Pilot Dashboard
A simple Tellus-branded web dashboard for dealership stakeholders, showing operational status at a glance.
What it displays
- • Current charger state (charging/discharging/idle)
- • Vehicle SoC when connected
- • Recent dispatch events
- • Cumulative revenue/savings summary
Data accessibility
- • UI: Web dashboard for daily monitoring
- • API: Data available programmatically for integration
Note: This is a simple operational view. For detailed financial analysis and shadow billing, use Skyprospector.
Tellus API Requirements
For full priority-based control, Simtricity requires these API capabilities:
- Charger control endpoints (start, stop, power setpoints)
- Vehicle state of charge (SoC) readings
- Session status updates
Simtricity will enhance Flux control modes as needed during the pilot integration.
Bidirectional Dispatch: Tellus Dependency
Bidirectional dispatch is available from day one — if Tellus provides a working charger API with V2G commands and a bidirectional-capable vehicle. The integration is straightforward for Simtricity; the dependency is on Tellus API readiness.
If only unidirectional charging (G2V) is available during the pilot, Simtricity will provide simulated discharge revenue projections based on actual market prices to demonstrate the value opportunity.
Whole Site Energy Optimisation
OptionalBehind-the-Meter Control (Add-on)
Why Add Whole Site Optimisation?
Workstream 3 proves V2G market revenue using only the COP11 asset meter. To unlock full site energy optimisation — peak shaving, DUoS avoidance, and intelligent import/export decisions — Flux needs visibility of total site demand via a boundary meter.
Timeline
- Month 2Boundary meter setup, price source config
- Month 3Site optimisation live, BTM dispatch active
- Month 4Full operation, actual vs shadow validation
Price Source Selection
Flux optimises against one client-selected price source. You choose which price signal drives real-time decisions — alternative tariffs are simulated as "shadow billing" in Skyprospector for comparison.
How Site Optimisation Works
Two Levels of Site Optimisation
Site optimisation can be delivered at two levels, depending on data access:
- • Uses the same LoA required for the Export MPAN
- • HHDC data available 24 hours behind
- • Optimisation based on daily averages and minimums
- • Captures approximately 50% of the value
- • No electrical work required on site
- • Second EMP1.cx CT meter installed at site boundary
- • Live, minute-by-minute site demand data
- • Full real-time optimisation of import/export
- • Captures the full 100% of the value
- • Requires electrical work on site
Decision point: Discuss Level 1 vs Level 2 options with the site client in Month 1 and make a decision by the end of Month 1.
What Site Optimisation Enables
| Simtricity | Tellus |
|---|---|
| Configure Flux with chosen price source | Decide primary price signal for optimisation |
| Integrate boundary meter data feed | Provide LoA or arrange CT meter installation |
| Deliver actual vs shadow comparison reports | Review and validate outcomes |
- Live site energy optimisation against your chosen price source
- Actual vs shadow tariff comparison in Skyprospector