Services for battery energy storage systems (BESS)

With long-term service agreements (LTSA), Siemens Energy guarantees on the performance and operation of BESS. Customers benefit from optimal profitability and the reliability of their Battery Energy Storage System (BESS) throughout its lifetime based on continuous improvement.

Siemens Energy safeguards grid operators by ensuring fast, reliable access to critical spare parts for battery energy storage systems. Our global parts service minimizes operational and fiscal risks with worldwide logistics, 24/7 customer support, and tailored spare parts solutions.

Siemens Energy customers benefit from the following key features minimizing downtime and risk at the same time as optimizing spare parts investment:

• Guaranteed availability of spare parts throughout the asset lifetime 
• Worldwide supply backed by Siemens Energy´s global logistics network
• Rapid response to customer requests via 24/7 Support Center
• Customized spare parts strategies:
  • Smart strategic spare parts solution - cost-optimal selection of essential parts
  • Spare parts inventory solution - maximize value from existing stock with assessments and interchangeability checks

Siemens Energy keeps your Battery Energy Storage System (BESS) running at peak performance – offering a wide range of scheduled preventive maintenance as well as unscheduled corrective maintenance for BESS which maximizes uptime, reduces risk, and ensures reliability when it matters most.

Scheduled preventive maintenance: the maintenance is planned according to OEM guidelines and project-specific maintenance plans, available from level one to three: 

• Level 1: Basic on-site tasks requiring no special tools (e.g., inverter reboot, oil replacement)
• Level 2: Skilled troubleshooting requiring certified expertise and specialized tools
• Level 3: OEM-level expert interventions for advanced technologies

Unscheduled corrective maintenance: Siemens Energy delivers fast and reliable corrective maintenance to minimize costly downtime and keep your plant running smoothly. Our expert teams and certified subcontractors are ready to repair or replace faulty components on-site within guaranteed response times in select regions. Whether its minor interventions handled directly on-site or major repairs requiring additional resources, Siemens Energy ensures swift, professional service that restores performance and protects your operations. 

Siemens Energy keeps your Battery Energy Storage System (BESS) future-ready and performing at its best. Through smart modernization and upgrades from control and protection systems to industrial IT, capacity augmentation, and complete DC/AC enhancements, we extend the lifecycle of your assets and maximize efficiency. With seamless integration and expert service, Siemens Energy ensures reliable energy storage that meets today’s demands and tomorrow’s challenges.

Siemens Energy ensures long-term performance of BESS by maintaining the required power and energy capacity throughout their lifecycle, typically 10 to 20 years. To address natural battery degradation, we offer two proven strategies: 

• PCS overhaul, where systems are initially designed to meet future capacity needs and
• System augmentation, where additional capacity is added at agreed intervals during the plant’s lifetime. System augmentation solutions that optimize both upfront capital expenditure and total lifecycle costs of BESS. Instead of oversizing the system at the beginning, capacity is added strategically during the project lifetime to maintain guaranteed energy and power output.