The Ceylon Electricity Board (CEB) initiated final testing of commercial-scale Battery Energy Storage Systems (BESS) across strategic grid substations in the Northern Province in August 2026. The lithium-ion storage units, positioned near Chunnakam and Jaffna transmission nodes, absorb surplus rooftop and ground-mounted solar energy during peak daylight hours. The stored energy is discharged into the national grid during evening peak demand hours, stabilizing regional voltage. CEB power engineers confirmed that the BESS installation will increase Northern Province renewable energy absorption by 35% while preventing grid tripping.