Project Overview
An industrial manufacturing facility in Valdorros (Burgos), Spain required a battery energy storage system to time-shift surplus generation from its existing 400 kW solar PV array, arbitrage volatile evening peak tariffs under the PVPC market, reduce curtailment losses, and provide uninterrupted backup for critical loads such as production lines and cold storage. The project supported Spain’s broader renewable energy integration and self-consumption objectives under RD 244/2019.
SUNPAL ESS was selected for its modular all-in-one cabinets, advanced EMS platform, and proven AC-coupled hybrid performance. The 1 MWh / 500 kW containerised BESS was designed, supplied, and commissioned as a behind-the-meter system delivering reliable daily arbitrage and operational continuity.
Challenge & Solution
Challenges
- Surplus solar generation exceeded daytime factory consumption
- Volatile evening tariffs increased grid electricity purchase costs
- PV curtailment reduced the value of available solar generation
- Critical production loads required reliable backup during grid outages
SUNPAL ESS Solutions
- 1MWh battery stores surplus solar for peak-period consumption
- 500kW PCS enables rapid charging and discharging for energy arbitrage
- Intelligent EMS optimizes PV, battery, grid, and factory loads
- Backup power supports critical production and cold-storage loads
Key Technical Specifications
| Parameter | Specification |
|---|---|
| PV Capacity | 400 kW |
| PCS Rated Power | 500 kW |
| Battery Capacity | 1 MWh |
| Battery Chemistry | LiFePO₄ |
| System Configuration | AC-Coupled |
| Installation Type | Behind-the-Meter |
| Energy Management System | Intelligent EMS |
| Critical Loads | Production Lines / Cold Storage |
| Electricity Market | PVPC |
| Regulatory Context | Spain RD 244/2019 |
Project Timeline
OCT 2022 | Project Design
SUNPAL ESS engineering team completed system sizing based on the facility's 400kW PV array, load profile, tariff structure, and critical-load requirements.
NOV 2022 | Equipment Preparation
The 500kW PCS, 1MWh LiFePO₄ battery system, EMS, and supporting electrical equipment were prepared for integration and site deployment.
MAR 2023 | Site Installation
The containerized BESS was installed behind the meter and electrically integrated with the existing solar PV system and industrial distribution network.
APR 2023 | System Integration
PV, battery, PCS, EMS, grid connection, and critical-load circuits were integrated to enable coordinated energy dispatch and backup operation.
MAY 2023 | Commissioned
The 500kW / 1MWh BESS completed functional testing and commissioning, enabling daily solar time-shifting, energy arbitrage, and critical-load backup.
