Peru scales up solar capacity as Sunny complex reaches 345 MW

Peru’s photovoltaic sector is moving from a pipeline of announced projects to tangible capacity additions, with recent developments indicating a structural acceleration in utility-scale solar deployment. 

The most immediate example is the commissioning of Sunny Expansión, a 141 MW addition authorised for commercial operation on April 3, 2026 by the Comité de Operación Económica del Sistema Interconectado Nacional (COES). 

This expansion brings the total capacity of the Sunny complex, operated by Kallpa Generación in La Joya, Arequipa, to 345 MW.

The sequencing of the project illustrates the transition from phased development to rapid scaling. The original 204 MW Sunny photovoltaic plant entered commercial operation in October 2025. Less than six months later, the expansion phase was integrated into the Sistema Eléctrico Interconectado Nacional (SEIN), following technical milestones such as the energisation of a 220 kV busbar and the L-2070 transmission line linking San José and Sunny in August 2025, PV Magazine reported.

This compressed timeline underscores improved execution capacity in both generation and grid integration.

From a technical standpoint, the expansion reflects a high-density configuration: 182,040 photovoltaic modules, 370 inverters and 13 transformation centres were deployed to optimise output and system stability.

These specifications indicate a design focused not only on installed capacity but also on efficiency and grid compatibility, aligning with broader trends in utility-scale solar engineering.

However, the significance of Sunny Expansión lies less in its standalone capacity than in its role within a broader investment cycle. According to Peru’s Ministry of Energy and Mines (MINEM), the country has nine solar projects scheduled between 2026 and 2028, representing a combined investment of $1.268bn and an additional 1,420 MW of capacity. This pipeline suggests that recent project completions are early indicators of a larger build-out phase rather than isolated achievements.

Geographically, this expansion is reinforcing a regional concentration of solar assets. Arequipa, in particular, is emerging as the primary hub, combining high solar irradiation with improving transmission infrastructure. Large-scale developments such as the 396 MW Illa solar project further consolidate this regional clustering, indicating a strategic preference among developers for southern Peru.

Regulatory and financial structuring have also played a role. The Sunny project’s expansion was enabled by prior approvals from MINEM in 2025 and supported by Kallpa’s $700mn international bond issuance, which facilitated both refinancing and construction financing.