This is an e-tender notice for a Comprehensive Annual Maintenance Contract for online UPS/Inverter and battery replacement in the NAG Division of South East Central Railway.The tender value is ₹25,59,832.00, and the required bid security is ₹51,200.Tender submissions are accepted from August 5, 2026, until 3:00 PM on August 19, 2026, with opening scheduled for the same day.