Sri Lanka’s Solar Capacity Tops 3,070 MW As Grid Operator Outlines New Measures

A milestone reached ahead of schedule

Sri Lanka's solar sector has crossed a significant threshold, with the country's installed solar power capacity now exceeding 3,070 MW, according to figures released by the National System Operator (NSO). The scale of the achievement becomes clear when set against daily consumption: depending on weather conditions, solar energy is currently meeting roughly 15% to 25% of the nation's daily electricity requirement. The composition of that installed base is heavily weighted toward consumer-scale generation.

Approximately 2,542 MW of the total has been delivered through rooftop solar connected under the Net Metering, Net Accounting and Net Plus schemes. The remaining 534 MW comes from ground-mounted solar projects. In other words, the overwhelming majority of Sri Lanka's solar capacity sits on the roofs of homes and businesses rather than in utility-scale fields.

Growth that keeps compounding month after month

The 3,070 MW figure is not a plateau. The NSO said that a further 25-30 MW of solar capacity is being added to the system every month through rooftop and ground-mounted projects that have already received approvals. This steady monthly inflow, the NSO noted, underscores the pace at which the technology is being adopted across the country. That continuing expansion is precisely what has prompted the grid operator to flag new measures. According to the NSO, rooftop solar additions envisaged for 2026 have already been exceeded, a consequence of rapid growth combined with existing technical limitations on the network. It is against that backdrop that the operator has moved to introduce closer oversight of new capacity.

A temporary check on new rooftop approvals

In response to the pace of rooftop uptake, the NSO has asked electricity distribution licensees, including EDL and LECO, to closely monitor new rooftop solar approvals and capacity additions. The instruction is directed at the approval stage of the process, giving the licensees a front-line role in tracking how much new rooftop capacity is being connected to the network. The NSO was explicit about the nature of the step, describing it as a temporary grid-security measure rather than a long-term restriction on renewable energy development. The framing positions the monitoring requirement as a response to present-day technical constraints rather than a shift in policy direction away from solar.

Applicants carved out from the new measures

While rooftop approvals face closer scrutiny, the NSO confirmed that several categories of solar connection remain unaffected. Zero-export solar connections, which allow consumers to store daytime solar generation in batteries for use during the evening and night, will not be subject to these limitations. These systems, by drawing on stored energy rather than exporting to the grid during peak evening demand, are treated separately under the new arrangement.

New applications will also continue to be accepted under the Net Plus scheme, meaning that one of the three main rooftop connection pathways remains open to fresh entrants. There is further protection for those already in the pipeline. The NSO confirmed that all solar applications approved before September 11, 2026, will be allowed to proceed without changes to their existing approvals. Applicants holding approvals dated before that cutoff therefore retain the terms under which their projects were originally sanctioned.

The road map to 2029

Beyond the immediate monitoring measure, the NSO has laid out its plans for solar expansion through the end of the decade. The operator intends to facilitate an additional 1,392 MW of solar capacity between 2027 and 2029. That total breaks down into three strands: 500 MW of rooftop solar, 442 MW of small- and medium-scale projects, and 450 MW of large-scale solar parks. The planned additions span the full spectrum of project scale, from individual rooftops through to utility-scale parks, and together would build substantially on the 3,070 MW already installed.

Storage as the counterpart to solar growth

Running alongside the solar expansion plan is a parallel commitment to battery energy storage. During the same 2027 to 2029 period, the NSO also intends to add approximately 1,240 MW/4,660 MWh of battery energy storage capacity. The operator identified storage as a component that will shape how the grid absorbs further solar growth, tying the two strands of its forward plan directly together. The pairing of the two figures is significant. The 4,660 MWh of energy storage would give the system a buffer to hold solar output for periods when the sun is not shining, addressing the variability that comes with a generation mix in which solar already supplies up to a quarter of daily electricity demand on favourable days.

Where the sector now stands

The current picture is one of a grid adapting to success. Solar capacity above 3,070 MW, monthly additions of 25-30 MW, and rooftop systems accounting for 2,542 MW of the installed base have combined to push the 2026 envisaged rooftop additions past their target ahead of time. The NSO's response, a temporary monitoring requirement on new rooftop approvals alongside continued acceptance of zero-export connections and Net Plus applications, and unchanged terms for all approvals granted before September 11, 2026, is designed to manage the technical limits of the network while the longer-term programme of 1,392 MW of additional solar and 1,240 MW/4,660 MWh of battery storage is delivered through 2029.