Independent Expert in Battery Storage & Grid Integration
Expert Energy Storage
Consulting & Engineering
From feasibility to commissioning, we support BESS and hybrid power plant projects at every stage. Independent engineering, owner-side expertise, and a single trusted partner across the full project lifecycle.
Pierluigi Sagarriga Visconti is a battery storage and electrical network specialist with over a decade of experience on BESS and hybrid power plant projects across France, Italy, and the UK.
Back to Grid operates on a trusted partner model: Pierluigi handles every engagement directly as lead expert, and brings in a curated network of certified specialists — grid studies engineers, financial modellers, fire protection consultants — precisely where each project demands it. You get the right expert for each discipline, coordinated by someone who understands the whole system.
His core specialisation covers BESS design, grid connection (HTA/HTB), Enedis/RTE procedures, and the technical interfaces between storage systems and electricity networks.
"Direct access to the expert. No layers. No hand-offs."
What We Do
Full-Lifecycle Consulting Services
Feasibility Studies & Project Development
We help developers and asset owners turn a site into a bankable BESS project. From initial screening to "Ready to Build" status, we secure land, manage grid connection applications, and coordinate every stakeholder along the way — so you reach project sanction with full confidence in the technical and regulatory foundations.
Site screening and environmental constraints analysis
Feasibility of MV/HV grid connection access
Land availability and suitability assessment for BESS installation
Coordination of external studies and local stakeholder relationships
Lease agreements, landowner negotiations and local authority engagement
Preparation of ICPE files, building permits and fire brigade meetings
Grid connection authorization and management of Enedis / RTE grid connection procedures (ORR/ORA, Offres à Gabarit)
Engineering, Design & Sizing
We design and optimize energy storage systems from preliminary sizing through to detailed engineering follow-up. Acting on the owner's side, we specify the right technical scope, coordinate the specialist studies required by the TSO for grid connection, and critically review every deliverable to ensure technical soundness, compliance and alignment with project economics.
Battery load profile development and analysis
Sizing and optimization of BESS and hybrid plants (PV+BESS, Wind+BESS)
EMS specification and Power Control System (PCS) sizing
Review of load flow, short-circuit and selectivity studies
Review of voltage fluctuation, unbalance and transient stability studies
Review of reactive power compensation design
Coordination and review of detailed engineering deliverables
Review of grid connection studies against TSO requirements
Techno-Economic Modelling
We translate technical configurations into financial performance. Working on the owner's side, we specify the modelling scope, define the right assumptions and scenarios, and critically review the techno-economic models produced by specialist consultants — so you can compare strategies and make capital allocation decisions backed by independently challenged data.
Specification and review of techno-economic models for BESS and hybrid plants
Definition of cycling, degradation and efficiency assumptions over project lifetime
Review of price and revenue stack forecasts from market analysts
Review of CAPEX and OPEX models, including TURPE charges
Benchmarking against CAPEX/OPEX of comparable projects
Oversizing vs. capacity augmentation strategy analysis
Review of PCS and battery replacement cost estimates
Definition and review of sensitivity analysis on key technical and market drivers
Procurement & Contract Support
We manage the full procurement cycle, from RFP drafting to contract signature, and we review EPC, O&M and PPA contracts on the owner's side. Our role is to protect your interests through clear scopes, robust performance guarantees and balanced commercial terms — backed by benchmark data from comparable projects.
Definition of scope and supply limits, drafting of technical specifications
Launch of consultations, Q&A management and tender meetings
Shortlisting of suppliers and comparative analysis of offers
Negotiation of equipment warranties and performance guarantees
Review of EPC contracts: commercial terms, commissioning tests, insurance and termination clauses
Review of O&M agreements: SLAs, on-call duty, availability and uptime guarantees
PPA consolidation and Term Sheet preparation with benchmarked key terms
Negotiation with aggregators for ancillary services, capacity markets and energy arbitrage
Owner's Engineering & Project Management
As your owner's engineer, we represent your interests throughout execution. We coordinate suppliers, subcontractors and stakeholders, track progress against schedule, and report on the KPIs that matter to you. A core part of our role: independent review of EMS control logics to ensure your BESS supplier and EMS integrator strictly respect TSO requirements and Route-to-Market specifications agreed with your Aggregator or Balance Service Provider.
Independent review of EMS control logics and dispatch strategies
Verification that EMS implementation respects TSO grid code requirements
Validation of Route-to-Market specifications with Aggregators and Balance Service Providers
Review of EMS functional specifications, alarms and operational dashboards
Project management and coordination across all BESS workstreams
Supervision of installation and commissioning activities
Coordination with suppliers, subcontractors and EPC contractors
Weekly progress reports, Gantt scheduling and customized KPI dashboards
Commissioning, Auditing & Fire Protection
We verify that what was promised is what gets delivered. From Factory Acceptance Tests to site commissioning and post-commercial operation performance audits, we apply rigorous test protocols to confirm system behaviour. We also develop dedicated fire protection concepts for containerized BESS — a critical safety pillar for any Li-Ion installation.
Factory Acceptance Tests (FAT) attendance and review
Test protocol definition and review
Construction site audits and quality inspections
Site commissioning and taking-over procedures
Detailed performance audits assessing technical and functional parameters
Specification and review of fire risk analysis for battery systems
Review of counter-measures and fire protection concepts
Coordination of fire protection design for containerized storage systems
The Model
One Expert. The Right Specialists.
You work directly with Pierluigi on every engagement. When a project requires specialist input — network studies, financial modelling, fire protection, certification — he mobilises the right certified expert precisely when needed. One interlocutor. Full coverage.
Lead Expert
Pierluigi leads every project from first call to final deliverable — no hand-offs, no juniors.
Certified Network
A curated network of domain specialists — grid engineers, financial modellers, fire safety — called precisely per project.
Owner-Side Only
Never linked to EPC contractors or equipment vendors. Your interests are always and only protected.
No Generalists
Every specialist brought in holds deep domain expertise — not broad consultants stretched thin across unfamiliar territory.
Core Expertise
Three Pillars of Technical Excellence
01
Energy Storage
Stationary battery energy storage systems (BESS) for grid balancing, frequency regulation (FCR), and renewable integration. Deep expertise in LFP and NMC chemistry selection, lifecycle simulation, and performance guarantees.
BESSLFP / NMCFCRGrid Balancing
02
Hybrid Power Plants
Co-located storage and generation projects combining renewables with battery systems to smooth intermittency, extend generation profiles, and maximise participation in ancillary service markets.
Solar + StorageWind + BESSCo-locationRevenue Stacking
03
Grid Connection & Network Studies
Grid connection is the technical bottleneck of every BESS project. Back to Grid specialises in the full HTA/HTB connection process — from grid access feasibility through to TSO approval — including coordination and critical review of all required network studies and compliance with Enedis and RTE grid codes.
HTA/HTBEnedis/RTEGrid CodeORR/ORA
References
Clients & Partners
Back to Grid has delivered consulting and engineering services to developers, utilities, and industrial clients across France, Italy, and wider Europe. Our independent, technology-agnostic approach is trusted by leading names in the energy sector.
Geographic Coverage
European Markets, Deep Local Knowledge
🇫🇷
France
Primary market with deep expertise in Primary Frequency Regulation (FCR), EPEX Spot, and the French grid balancing landscape.
Primary FCREPEX Spot / Nord PoolRTE Grid Compliance
🇮🇹
Italy
One of Europe's most dynamic storage markets. Back to Grid is a recognised specialist in the Italian MACSE capacity auction mechanism and TERNA's storage framework.
Active market coverage for GB wholesale electricity and ancillary service markets, including Balancing Mechanism participation and capacity contracts.
Balancing MechanismCapacity MarketFFR / DCR
Let's Talk
Speak Directly with the Expert.
Whether you're developing a new BESS project, selecting suppliers, or need independent engineering support — you'll work directly with Pierluigi, the specialist, from first call to final deliverable.
