Store and manage your energy for greater energy flexibility, competitiveness, and resilience
In a complex geopolitical context marked by high volatility in electricity prices, growing grid constraints, and the accelerating energy transition, companies must go beyond simply producing energy.
The real challenge now is: How can we optimize, make the most of, and intelligently manage the energy available on-site?
BESS – Battery Energy Storage System is emerging as a strategic lever for competitiveness for players in the C&I (Commercial & Industrial) sector and for local authorities.
By making it possible to decouple generation and consumption, storage turns energy into a controllable asset that creates both economic and environmental value.
When combined with solutions for energy efficiency, solar generation, and intelligent management systems (EMS), it becomes the cornerstone of an effective energy strategy.
How does a BESS energy storage solution work?
A battery energy storage system (BESS) is a smart system that can capture, store, and deliver electricity at the most opportune time. In practice, energy generated via solar panels or the grid is converted and stored in batteries. An energy management system (EMS) controls all of the site’s energy flows in real time, acting at the heart of the system. The EMS simultaneously coordinates consumption, solar generation, storage, market prices, grid constraints, and weather conditions. Based on these parameters, the EMS automatically determines whether it is best to store the energy, use it immediately, or feed it back into the grid.
This intelligence is enhanced by the integration of advanced algorithms and artificial intelligence. These features can anticipate energy needs, forecast production and price fluctuations, and determine the best course of action. The system continuously optimizes the site’s operations by adapting in real time. When demand increases or prices rise, stored energy is released strategically to power the site or maximize its value.
Thus, BESS becomes a true energy orchestrator. It not only stores energy, but also anticipates, makes decisions, and optimizes. This makes it possible to synchronize production and consumption, improve autonomy, and maximize the use of every kWh.
Why deploy energy storage systems (BESS)?
By combining energy efficiency + solar generation + BESS storage + intelligent management
A C&I client can:
- Cover up to 50% of its electricity needs
- Reduce its bill by at least 20%
- Gain energy independence and flexibility
GreenYellow then becomes its energy shield.
Maximize the value of the energy produced on site
In practice, the energy needs of an industrial site and solar generation are not synchronized.
Storage allows you to regain control over when the energy is used:
- Store the electricity produced during the day for later use
- Significantly increase the self-consumption rate (up to 40–60%)
- Avoid selling energy back to the grid immediately at a low price
Result: every kWh produced is used at the best moment, and therefore better monetized.
Reduce costs and better control your erngy bills
A BESS acts directly on energy expenses:
- Purchase less electricity from the grid
- Protect against price increases and volatility
- Reduce power peaks (peak shaving)
The result is a more stable, predictable, and optimized bill.
Strengthen energy independence and resilience
Storage strengthens the site’s energy security:
- Reduced dependence on the power grid
- A secure power supply in the event of a disruption
- Greater control over your power supply
Energy is becoming a driver of performance, not a risk.
Bringing flexibility to the power grid
The BESS doesn’t just benefit your site—it also contributes to a smarter power grid
- Fine-tuned management of energy flows
- Participation in grid balancing
- Easier integration of renewable energy
Storage becomes a true flexibility tool, at the heart of the energy transition.
Energy Storage: the key to smart management
Energy storage is the essential building block that makes the transition from the traditional model, in which energy is produced and consumed instantly, possible. This transition allows for a much more advanced approach to smart management.
Indeed, without storage, a site is subject both to the variability of its generation (particularly renewable) and to grid or price constraints, with no room for arbitrage.
Conversely, a storage system (BESS) introduces decisive flexibility:
It enables us to store energy and use it at different times, based on operational needs or economic opportunities. Thus, energy becomes a strategic resource that can be managed and optimized rather than a passive flow.
This capability paves the way for smart energy systems that can anticipate, balance, and adapt in real time. Storage becomes a key driver of performance, resilience, and the energy transition.
Key use cases
Optimized grid injection
Energy storage allows you to delay feeding electricity into the grid until conditions are more favorable.
The result
better utilization of the produced energy and a contribution to grid stability.
Optimized Self-Consumption | PV + BESS Hybrid System
Storage enables the saving of solar energy generated during the day for later use when demand is higher.
The result
low-cost energy being fed into the grid and a significantly improved self-consumption rate.
Peak shaving
The BESS provides energy during peak demand periods, which limits the amount of power drawn from the grid.
The result
lower peak-demand costs and better control over energy bills.
Load shifting
Energy is stored during periods of low prices or demand and used during periods when it is more expensive.
The result
cost optimization by consuming at the most cost-effective time.
Emergency Power Backup
In the event of a power outage or grid disruption, the storage system powers critical equipment.
The result
business continuity and secure operations.
Energy trading / market arbitrage
Storage enables the purchase of electricity at low prices for resale or use when prices rise.
The result
generation of additional revenue and dynamic optimization of energy costs.
Grid Services (flexibility, frequency, capacity)
The BESS can provide services to the power grid, such as frequency regulation, reserve capacity, and load shedding.
The result
new sources of revenue that contribute to network stability.
Microgrid/Off-Grid Sites
Combining energy storage with local power generation sources (such as solar panels or generators) makes it possible to manage an off-grid power system.
The result
achieve greater energy independence and a more secure energy supply, even in remote areas.
Multi-purpose (multi-asset) optimization
Storage can be used for several purposes simultaneously: self-consumption, peak shaving, trading, and grid services.
The result
Maximizing profitability through the combination of several value-enhancing drivers.
BESS: The heart of the integrated energy ecosystem
Storage is no longer a standalone product; it is becoming the backbone of a comprehensive energy ecosystem.
GreenYellow is developing several value chains centred on battery storage systems:
- Decentralised solar power for grid feed-in or self-consumption + BESS
- Energy efficiency + BESS
- PV + BESS + energy trading
- BESS standalone
A modular and customized approach, tailored to each client.
Proven performance
- 1,500 EEA or UaaS contracts
- 1,350 photovoltaic solar plants under supervision
- 100,000 variables analyzed every 5 minutes
- 30,000 events handled per year
- 98.5 % per cent uptime
The challenge: to maximize energy value and ensure reliable results.
GreenYellow is developing several value chains centred on battery storage systems:
- Decentralised solar power for grid feed-in or self-consumption + BESS
- Energy efficiency + BESS
- PV + BESS + energy trading
- BESS standalone
A modular and customized approach, tailored to each client.
Proven performance
- 1,500 EEA or UaaS contracts
- 1,350 photovoltaic solar plants under supervision
- 100,000 variables analyzed every 5 minutes
- 30,000 events handled per year
- 98.5 % per cent uptime
The challenge: to maximize energy value and ensure reliable results.
The Energy-as-a-Service model: performance without investment (ESCO)
With GreenYellow:
€0 CAPEX (financing provided by GreenYellow)
Operation and maintenance included
Risks transferred
Performance commitment
- 3 500 Energy-as-a-Service (EEA– UaaS) contracts delivered since 2007
- 1 500 Energy-as-a-Service contracts (EEA – UaaS) currently in operation
- 1,350 photovoltaic solar plants under supervision
- 100,000 variables analyzed every 5 minutes
- 30,000 incidents/alerts reported and dealt with each year
- 98.5 % per cent uptime
You pay for a result, not for equipment.
Performance commitment
- 1,500 EEA or UaaS contracts currently in operation
- 1,350 photovoltaic solar plants under supervision
- 100,000 variables analyzed every 5 minutes
- 30,000 incidents/alerts reported and dealt with each year
- 98.5 % per cent uptime
You pay for a result, not for equipment.
GreenYellow positions itself as a leading partner in managing energy flexibility, offering a comprehensive and integrated approach.
From design to operation, the company draws on its expertise in sizing, financing, installing, and integrating BESS and EMS solutions to ensure high-performance systems tailored to the specific challenges of each site.
GreenYellow provides support throughout the entire lifecycle of facilities, including maintenance, management, and continuous optimization. This enables businesses to maximize their energy usage while achieving operational efficiency, cost control, and sustainable performance.
GreenYellow’s advantages
A key player in the decentralised energy transition since 2007
Expertise in multi-site and complex sites
Comprehensive, value-adding energy solutions (efficiency + solar + storage + trading),
An integrated approach and a contract that is 100 per cent funded and risk-free
Advanced digital control
Guaranteed performance (> 98.5 per cent uptime)
Thanks to operational and digital monitoring, we guarantee performance. We monitor 100% of our assets in real time, analyzing more than 50 million data points daily. Our availability rate exceeds 98.5%, ensuring a secure return on investment.
Our Key Figures
MWp
storage capacity
MWh
project opportunities
Discover examples of client projects involving stand-alone BESS systems or solar PV hybrid systems
Read our customer testimonials
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Reduce your energy costs, maximise your flexibility and accelerate your transition,
without any initial investment or risk.
Take advantage of a customized assessment conducted by our experts to find
the best solution for your business.
