After-sales Support
Service requests, fault reports, maintenance schedules and warranty information for installed CESC energy storage systems.
Fill in your product information, describe the issue and select urgency level.
Our service team reviews your request and provides initial diagnosis within 24 hours.
Remote troubleshooting, firmware update, parts replacement or on-site service as needed.
Report an issue
Submit your service request and our after-sales team will respond within 24 hours with a diagnosis and action plan.
24-hour response guarantee
Initial diagnosis within one business day
Remote-first approach
Remote diagnosis & OTA updates supported for BMS/EMS
On-site service network
Certified service partners across 25+ countries
Full lifecycle tracking
Every request tracked from submission to closure
Find a service outlet near you
- Bonn
- Berlin
- Riverside
- Queretaro
- Saint-Germain-du-Puch
- Wolkersdorf
- Siracusa
- Vardon
- Veendam
- Lasi
- Bucharest
- Bonn
- Berlin
Service policy
Overview of warranty terms, covered services and conditions. Refer to your purchase contract for product-specific warranty details.
All CESC battery systems are covered by a standard warranty of up to 10 years from the date of commissioning, subject to product series and contract terms.
Battery capacity is guaranteed to remain above the specified threshold (typically 80%) throughout the warranty period under normal operating conditions.
Manufacturing defects, component failures under normal use, firmware-related faults and performance degradation beyond the guaranteed threshold.
Physical damage, unauthorized modifications, operation outside specified parameters, force majeure events and consumable parts (fuses, fans, filters).
Extended warranty packages are available for purchase at the time of order or within the first year of commissioning. Contact sales for pricing.
Paid service available for systems beyond warranty period. Includes diagnostics, parts replacement and on-site labor at standard service rates.