Storage

Advanced BESS & Hybrid Engineering
for Grid Flexibility and Maximum Revenue

We overcome the intermittent nature of renewable energy with battery energy storage systems, maximising plant market revenues. Simulation-driven sizing with LFP cell chemistry, BMS integration and full compliance with TEİAŞ grid codes.

BESS & Hybrid Engineering Architecture

Detailed 4-Phase BESS Process

End-to-end engineering from arbitrage simulation and cell chemistry selection through grid code compliance to degradation management during the operational period.

01Phase 01

Plant Generation Analysis, Arbitrage & Charge/Discharge Simulation

Before proceeding, the plant's historical generation data and electricity market prices are simulated to determine optimum BESS sizing.

  • Hourly (8,760 Data Points) Profile Analysis: Seasonal and hourly generation profiles are extracted to identify curtailment losses
  • Arbitrage and Price Volatility Model: Optimal charge/discharge scheduling to maximise revenue from price differentials between the Day-Ahead Market (DAM) and Intraday Market (IDM)
  • Optimum Capacity (MWh) & C-Rate Determination: MWh capacity and C-Rate parameters that minimise investment payback period
DAM / IDM SimulationArbitrage ModelMWh SizingC-Rate
02Phase 02

Cell Chemistry, System Architecture & Safety Design

The hardware architecture is structured for long-life, safe operation. The AC/DC coupling decision is determined based on the existing plant configuration.

  • LFP (Lithium Iron Phosphate) Cell Selection: Tier-1 LFP cell technology delivering high cycle life, thermal stability and safety
  • AC / DC Coupling Decision: DC-coupled (pre-inverter) or AC-coupled (post-transformer) architecture based on the existing plant structure
  • BMS, HVAC & Fire Suppression: Cell-level voltage/temperature monitoring Battery Management System and gaseous fire suppression to NFPA standards
LFPAC-CoupledDC-CoupledBMSNFPA 855
03Phase 03

Hybrid Plant Integration & Grid Code Compliance Management

A secondary source or storage is integrated into the existing plant, ensuring grid compliance and Energy Management System (EMS) integration.

  • Secondary Source Integration: Adding solar and BESS to WPP or HPP plants to deliver licensed capacity to a balanced grid around the clock
  • TEİAŞ Ancillary Services Compliance Infrastructure: Millisecond-level controller installations for Primary Frequency Control (PFC), Secondary Frequency Control (SFC) and Reactive Power Support
  • SCADA & Energy Management System (EMS): Intelligent EMS software integration enabling communication between the plant's main control centre and the BESS infrastructure
Hybrid PlantPFC / SFCEMSSCADA
04Phase 04

Operations, Cell Degradation & Warranties

Efficiency is guaranteed throughout the investment's operational life. Battery health and degradation are continuously monitored.

  • Degradation and State of Health (SOH) Monitoring: Real-time tracking of the effect of charge/discharge depth (DoD) on battery life, and State of Health (SOH) reporting
  • Performance Guarantees & Warranty Tracking: Field verification and testing of manufacturer efficiency guarantees (e.g. 10 years / 6,000 cycles at 70% SOH)
SOH MonitoringDoD ManagementDegradation ModelCycle Life
Competitive Advantage

Why AL ENERJİ for BESS & Hybrid?

Market and Simulation-Driven Sizing

We size storage capacity not on arbitrary values, but with precision — using financial simulation tools that analyse historical generation data, grid connection constraints and market price volatility (MCP).

Integrated EPC Delivery

From cell chemistry selection and AC/DC coupling architecture through transformer/MV switchgear adaptation to SCADA integration, we manage the entire process end-to-end. Single point of responsibility.

Legal and Regulatory Compliance

Full support in licensing processes with technical dossier preparation and approval management in accordance with EPDK storage electricity generation regulations and YEKDEM settlement rules.

Scope Matrix

BESS & Hybrid Technical Parameters Matrix

Technical parameters, revenue streams and regulatory compliance by storage and hybrid application type.

Application Type Key Technical Parameters Primary Revenue & Efficiency Item Applicable Standard / Regulation
Market Arbitrage (Arb) 0.5C – 1C, LFP Cell, AC-Coupled Selling at high prices during peak hours, charging during low-price hours EPDK Storage Regulation · MCP
Curtailment Prevention DC-Coupled BESS, High C-Rate Storing energy spilled due to grid constraints TEİAŞ Connection Agreement & Transformer Capacity Limits
Ancillary Services High-Speed Response (<200ms), EMS TEİAŞ Primary/Secondary Frequency Control revenues TEİAŞ Grid Code Ancillary Service Standards
Hybrid Plant (WPP+SPP+BESS) Shared Transformer/Switchgear, Smart EMS YEKDEM guarantee and imbalance penalty minimisation Law No. 5346 on Renewables & Hybrid Plant Regulation
Frequently Asked Questions

About BESS & Hybrid

Why is LFP (Lithium Iron Phosphate) chemistry preferred in BESS?+
LFP cell chemistry offers superior thermal stability compared to alternatives such as NMC, outstanding safety against explosion and ignition risks, and a long service life of 6,000 to 8,000 cycles. It is accepted as the industry standard for grid-scale stationary storage investments because it minimises the Levelised Cost of Storage (LCOS).
When adding BESS to an existing solar or wind plant, should AC-Coupling or DC-Coupling be preferred?+
For operating plants, AC-Coupling is generally preferred as it provides easy integration without changing the existing inverter and switchgear structure. For new installations or plants with high curtailment, DC-Coupling before the inverter can be chosen to reduce conversion losses.
How does cell degradation affect financial returns in BESS projects?+
Battery cells lose capacity over time as a function of charge/discharge cycles. If daily depth of discharge (DoD) and ambient temperature are not properly managed in financial models, the battery life may end earlier than targeted. In the simulations we develop at AL ENERJİ, we reflect cell ageing curves in 10–15-year cash flows to deliver realistic profitability analyses.
What are the YEKDEM advantages of storage-equipped renewable energy plants in Turkey?+
Renewable energy plants with storage significantly reduce imbalance costs because they can deliver their committed generation to the grid more reliably. Furthermore, thanks to storage, they can optimise sales revenue by feeding their generation to the grid during peak hours when market prices are highest.
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