Elys' services: battery storage

Development and finance

Elys relies on its field experience to support developers and investors in the initial project phase.

Early stage Design for permiting and/or budget evaluation

Electrical Basic Design

  • Preliminary layout
  • Preliminary Single Line Diagram
  • Definition and rating / sizing of main equipment specifications
  • Dimensionnement et spécifications des infrastructures électriques
  • Earthing Potential calculation for gas pipe compliance or low voltage installations

Civil Basic Design

  • Geotechnical Report
  • Access Roads and Platforms Layout
  • Access Roads and Platforms structure Pre-Design
  • Foundation Pre-Design


  • drawing
  • Photomontage

CAPEX & OPEX Estimations

Bid Specification preparation
Tender Procedure
Employer’s Requirements
Bidders Prequalification
Bid Evaluation
Contract Negotiation
Contract Award


We use our own teams to design the civil and electrical infrastructure.

Load Flow / Losses
Short Circuit
Selectivity/Protections studies
Harmonics studies
Earthing system calculation
Grid Compliance studies
Stability studies
Regulation design/studies (P/Q/U)
Lines/Cables studies
Single Line Diagrams
SCADA design and implementation

Foundation design


Remaining as true to the site as possible, we ensure that quality, costs, planning and safety are respected during construction.

Tender Support / Preparation
Project Management
BoP Civil Works Site Management
BoP Electrical works Site Management (MV network & HV Substation)
Mechanical Assembly supervision
Commissioning supervision
Contractors’ coordination – Planning
Quality inspections
Budget monitoring
Invoices approval
Taking over management (punch list)
Contract amd claim management
EHS management

Construction reports review
Change Orders Review and Approval
Periodical site visit
Ongoing technical and contractual assistance

Transformats HTB
Cellules HTA
Postes HTB

Lender advisor


O&M audits

Benefit from our expertise to ensure your production assets remain stable (audits, resolving problems).

Due diligence

Expertise on operating parks

Production optimization / Cost reduction for Wind Farms in O&M