Power generation · energy storage · island grids

Engineering that gets grid-scale power built, tested and trading

Independent, employer-side consultancy for BESS, grid connections, control systems and island power. From feasibility to commissioning to operation. Led by Jon Stokes with a team of consultants and engineers, based in Alderney, Guernsey (Channel Islands) and working across the UK and worldwide.

1GW+grid-scale BESS supported through delivery
20+ yrspower generation, storage and controls
50+BESS sites commissioned, migrated, metered or reviewed
33kVHV Senior Authorised Person, 11 kV and 33 kV
ITENESO Independent Test Engineer for Grid Code compliance

Services

Employer-side. Hands-on.
Start to finish.

A consultancy that has built, wired, programmed and tested the plant it advises on, with a team of engineers available when the job needs more than one pair of hands.

DUE DILIGENCE

Technical and regulatory review

Independent review for investors, lenders and owners across the project lifecycle, from grid application to operating asset.

  • Feasibility and concept design
  • Financial modelling and investment support
  • Employer's Requirements, SoW and bid reviews
  • Augmentation and OEM strategy
COMMISSIONING

Compliance and test engineering

Commissioning management and witness testing at DNO and transmission connected levels, including NESO Independent Test Engineer services.

  • Grid Code and G99 compliance
  • HIL test planning and FDS review
  • EON to ION to FON progression
  • Frequency response and D-code testing
CONTROLS

PPC, SCADA and OT systems

Design, integration and optimisation of the control layer between the plant and the market, from engine controller to trading platform.

  • PPC, EMS and BoP PLC specification and programming
  • Siemens WinCC OA, ComAp, Perkins and Caterpillar control systems
  • SCADA, OT networks and cyber-security reviews
  • Operational and settlement metering
  • Trading platform integration and migration
CUSTOM DEVELOPMENT

Bespoke SCADA and software

When the off-the-shelf product does not fit the plant, we build it: control logic, SCADA, data collection and the tools that sit around them.

  • Bespoke SCADA, HMI and EMS development
  • Remote monitoring and data logging platforms
  • Custom PLC logic and protocol integration
  • Portals, dashboards and reporting tools
G99 AND PROTECTION

G59/G99 and relay testing

Witness-ready testing of generation and storage connections at LV and HV, with the paperwork the DNO expects.

  • G99 commissioning and witness testing
  • Protection relay secondary injection and settings
  • Loss of mains, anti-islanding and export limitation
  • HV authorisation and switching
OWNER'S ENGINEER

Employer-side delivery support

Inside the client's project team, managing EPC and OEM relationships and protecting the client's interests through delivery.

  • Technical queries and change control
  • Site management and inspection
  • CDM project management, including Principal Contractor
  • Commercial and contract management
ISLANDS

Microgrids and island power

Hybrid generation, renewables integration and grid stability for islands and off-grid sites, with engine control across gas, diesel and hybrid plant.

  • Hybrid power station design and control
  • Solar, wind, tidal and storage integration
  • Grid reliability and stability studies
  • Gasification, bio-diesel and bi-fuel gas conversions
ROUTE TO MARKET

Route to market integration

Connecting the asset to the optimiser, aggregator or trader that will dispatch it, and proving the whole chain works before go-live.

  • Optimiser and aggregator platform integration
  • Dispatch signal path, telemetry and metering checks
  • Platform migration on operational sites
  • Bid-to-settlement process and BMU registration
OPERATIONS

O&M and trading readiness

Getting operating assets into a state that can be run, maintained and traded day to day.

  • O&M manuals and operating procedures
  • STOR, FFR, Capacity Market and BM
  • BMU and settlement registration
  • Recovery of stalled or distressed projects
Transmission substation with HV disconnectors and busbars

From energisation to final operational notification

We have taken transmission-connected batteries through EON, ION and FON with NESO, and recovered a stalled site to one trading daily.

Track record

Delivered at scale

500MW

1 GWh transmission-connected BESS

Employer-side technical consultant: HIL test planning, EPC interface, grid compliance, metering architecture and frequency control analysis. Southern Scotland.

200MW

Transmission-connected BESS

Commissioning and integration lead: trading platform, SCADA, metering, EON to FON, Grid Code and compliance testing. North East Scotland.

HVDC

Island standby BESS and AC choppers

Control scheme development with the network operator: signal paths, operating modes, SCADA and cyber-security reviews, operational metering. Technical consultant and commissioning support. Northern Isles.

Client and site names are withheld. Locations are given to the nearest region and capacities are indicative.

100 MW BESSNorth West England
Full O&M manual covering the power plant controller, battery system, trading platform and balance of plant, plus employer-side reviews across other sites in the portfolio.
RoleTechnical consultant and commissioning manager
Grid-scale BESS in developmentScotland and North East England
Scoping, scope of works and Employer's Requirements reviews, OEM selection and augmentation strategy ahead of EPC award.
RoleTechnical consultant to the owner
Recovery of a stalled BESSEngland · 2022 to 2026
Took a non-operational distribution-connected site to a fully functional asset trading daily after the collapse of the original EPC, working with the OEMs, optimiser and NESO to secure a compliant handover.
RoleProject and commissioning manager, then lead engineer
Distribution-connected BESS portfolio10 to 30 MW per site · Kent, Essex, Sussex, Oxfordshire
Trading platform migration, metering and communications upgrades, multi-site management and operational review.
RoleTechnical consultant
Operational fleet, c.30 sites20 to 100 MW · UK wide
Migration to a new trading and control platform with metering and PPC updates across the fleet.
RoleTechnical consultant and commissioning manager
35 development sites20 to 100 MW · UK wide
Development support from planning and grid applications through to Gate 2 and beyond, with projects sold on to developers.
RoleTechnical lead
100 MW wind farm extensionAberdeenshire
Development support for the extension of an operating onshore wind farm: grid connection and capacity assessment, turbine and layout options, substation and control interface with the existing site, and the technical input to planning and grid applications.
RoleTechnical consultant
Onshore wind development portfolioUK wide
Technical development across numerous onshore wind sites using Vestas and Siemens Gamesa class turbines: site screening and feasibility, grid application and connection design, turbine selection and OEM engagement, SCADA and control interface specification, and the technical case taken to investors and developers.
RoleTechnical consultant
Solar farm due diligence and saleUK wide · multiple projects
Technical review of operating and ready-to-build solar farms for buyers, sellers and lenders: inverter and transformer condition, DNO connection and G59/G99 compliance, PPC and monitoring, performance against yield, defects and the cost to put them right. Several sites taken through to sale on the back of the review.
RoleDue diligence and technical review
Solar farm commissioningUK wide · multiple projects
Commissioning and connection of ground-mount solar across several sites: inverter and PPC set-up, export limitation, protection and G99 witness testing with the DNO, and handover into operation.
RoleCommissioning engineer
Long-duration energy storageUK
Technical due diligence on a portfolio of LDES sites for a developer and its investors.
RoleDue diligence
Solar PV and BESS hybridUK
Power plant controller integration and G99 compliance support for the developer.
RoleTechnical consultant
Airport solar PV and BESSCentral Scotland
Investigation, reports and rectification proposals for an underperforming installation, adopted by both the client and the original installer.
RoleIndependent review and technical engineering review
Island hybrid power station and gridAlderney, Channel Islands · 2017 to present
Replacement of an ageing manually operated station with a new central station of high-efficiency Perkins engines under ComAp hybrid control, delivered without interruption to the island's supply. Since then: 11 kV network and substation control, protection, SCADA and OT infrastructure, LV network monitoring, a rooftop solar PV programme, and a bespoke energy management layer being developed to bring solar, wind, tidal and storage onto a grid with no interconnector. Energi's founder remains the utility's Head of Technical, Engineering and Commissioning.
RoleProjects and commissioning manager; now technical authority
Tidal energy developmentChannel Islands · 2024 to present
Engineering direction for a tidal development in island waters, including grid integration and interface with the island utility.
RoleTechnical lead
100 MW gas peaking plantTeesside · 2019 to 2020
CDM project management across enabling works, civils, piling, steelwork, controls, mechanical systems and LV/HV installation.
RoleConstruction project manager
Fast-response flexibility assetsUK · 2017 to 2019
End-to-end design, build and commissioning of fast-response generation and storage integrated with an aggregator platform, including bespoke PLC programming and generator reconfiguration for sub-second dispatch.
RolePower generation engineer
EFR battery developmentsUK · 2016 to 2017
Development and technical support for battery storage projects bidding into National Grid's first Enhanced Frequency Response tender: site selection, grid connection, control and metering concepts for sub-second response.
RoleTechnical consultant and commissioning engineer
200 MW of diesel long-term STORUK wide · 2012 onwards
Development, installation and commissioning of diesel reserve plant across multiple sites under long-term STOR contracts: generator selection, control and synchronisation, G59 connection and testing, remote monitoring and dispatch integration.
RoleProjects and construction manager; commissioning engineer
FFR and diesel response with an aggregatorUK
Enabling diesel and battery assets for Firm Frequency Response and reserve dispatch through an aggregator later acquired by a global energy major: control integration, telemetry and response testing.
RoleTechnical consultant and commissioning engineer
Anaerobic digestion plant developmentsUK · multiple projects
Development and engineering support for AD plants running on agricultural, food and commercial waste feedstocks: feedstock and gas yield assessment, biogas engine selection and control, CHP and grid connection design, G59/G99 and export limitation, and the operational monitoring to keep the engines running on variable gas quality.
RoleTechnical consultant and project management
Syngas and waste-to-energy developmentsUK
Gasification and syngas generation projects taking gate-fee waste streams, from mixed commercial and industrial waste to wood and refuse-derived fuel: intake and fuel specification, gasifier and engine integration, gas clean-up and control, grid connection and the technical case for gate-fee revenue alongside export.
RoleTechnical consultant and control systems
Engine conversions and alternative fuelsUK
Gasification, bio-diesel and bi-fuel gas conversions on generating plant, with the control system changes needed to run them safely and meet connection requirements.
RoleControl systems and project management
80 MW CCGT power stationIsle of Man · 2001 to 2004
Construction and commissioning of a new combined cycle station for the island utility: Foxboro Invensys DCS and SCADA, turbine control routings and GE LM2500 gas turbine commissioning.
RoleDCS technician; IT and documentation manager

Sectors

Battery storageLong-duration storageGas peakingCCGTDiesel and hybridSolar PVWindTidalBiomass, AD and biogasIsland and microgridData centres
Island power station beside the harbour

Island power is where it all has to work at once

Engines today, with solar, wind, tidal and storage on the way, all on one small grid with no interconnector to lean on. Energi was built in Alderney, where we rebuilt the island's power station and grid with the AEL team and still run its engineering.

About

Led by Jon Stokes

Energi is led by Jon Stokes, a power generation and energy storage engineer, project manager and consultant with over twenty years across BESS, microgrid, island power, engine control, SCADA and OT systems.

Jon has delivered complex, multi-disciplinary projects at DNO and transmission connected levels, from feasibility and financial modelling through to commissioning and O&M. His background is hands-on across mechanical, electrical and control systems, including PPC, DCS, protection and control, and engine control across gas, diesel and hybrid plant. He is an HV Senior Authorised Person at 11 kV and 33 kV and a NESO Independent Test Engineer.

Alongside Energi he is Head of Technical, Engineering and Commissioning at Alderney Electricity Limited, the island's utility, where he is technical authority for generation, network and control assets.

Equipment and platforms worked with include ComAp, Siemens, ABB, SMA, Wärtsilä, BYD, Sungrow, Tesla, Bachmann, Hyosung, Power Electronics, KrakenFlex, Foxboro, Perkins, Caterpillar, GE and Cummins.

The team

Behind Jon is a team of consultants, engineers and technicians with long experience in the power industry, available for engineering, commissioning, testing and site management on a project or contract basis.

  • Commissioning and test engineers for BESS, generation and HV connections
  • Control, SCADA and software engineers
  • Protection and G99 test technicians
  • CDM project and construction managers
  • Available in the UK and internationally

Contact

Talk to us about your project

Available for employer-side consultancy, commissioning and test engineering, and due diligence assignments in the UK and internationally, with a team of trusted engineers and consultants behind us when the job needs more hands.

Office

Old Salvation Army, High Street
Alderney, Channel Islands GY9 3TG