BESS Development
Battery Energy Storage Systems in Sri Lanka
Utility-scale Battery Energy Storage Systems (BESS) in Sri Lanka — 10 MW / 40 MWh systems for grid balancing, peak-load management, and renewable energy firming.
What is a BESS?
Battery storage that puts electricity where and when it is needed.
A Battery Energy Storage System (BESS) is a utility-scale installation that stores electrical energy in battery cells and releases it to the grid on demand. Unlike conventional power plants, a BESS can respond within milliseconds — absorbing surplus generation during low-demand periods and discharging during peaks.
At grid scale, BESS acts as a critical balancing asset: it smooths the variability of solar and wind generation, provides fast-response frequency regulation, and enables a higher proportion of renewables to operate reliably on Sri Lanka's national grid.
BESS technologies including lithium iron phosphate (LFP) chemistry have matured rapidly, bringing utility-scale projects to cost parity with conventional peaking plants while offering longer operational life and lower maintenance requirements.
Grid Applications
Six ways BESS strengthens the grid.
- Frequency regulation and reserve capacity
- Peak-load shifting and demand management
- Renewable energy firming (solar and wind)
- Voltage and reactive power support
- Black-start capability for grid restoration
- Reduction of fossil fuel peaking plant use
Skylis Project Specifications
10 MW / 40 MWh — district-scale storage at 33 kV.
Skylis Lanka Power is developing Battery Energy Storage Systems at the 10 MW / 40 MWh scale — a project size capable of providing meaningful grid support at the district and provincial level. Each project targets interconnection to the 33 kV distribution network at a CEB grid substation.
10 MW
Rated power output
Peak discharge rate
40 MWh
Energy storage capacity
4-hour duration at full power
33 kV
Grid interconnection
CEB distribution substation
2 ×
Hambantota projects
Current development priority
Strategic Development