IN Brief:
- The €730 million package supports refinancing, optimisation, and construction across four Southern European markets.
- Approximately 540MW of photovoltaic capacity and two battery assets are included, with more than 350MW allocated to Italy.
- The financing establishes a wider platform for hybridising solar assets and expanding storage deployment.
Sonnedix has closed €730 million of financing to refinance, optimise, and construct renewable energy assets across Italy, Spain, Portugal, and France, combining a substantial solar portfolio with two battery energy storage projects.
The package covers photovoltaic plants with a combined capacity of approximately 540MW alongside the two battery assets. More than 350MW of the capacity allocation is in Italy, making it the largest national component and giving that market particular weight within Sonnedix’s Southern European platform.
AIB, Crédit Agricole CIB, CIBC, ING, Intesa Sanpaolo, Sabadell, Santander CIB, Société Générale, and UniCredit participated in the transaction. The breadth of the banking group reflects the number of markets, assets, and financing purposes involved rather than a single project reaching financial close through one standard construction facility.
The proceeds cover several points in the asset lifecycle. Existing plants can be refinanced under updated terms, operational assets can be optimised, and projects still requiring construction capital can move towards delivery. Combining those requirements can simplify portfolio funding, although lenders must still assess assets operating under four separate legal and electricity-market frameworks.
Solar finance creates a base for storage
Sonnedix is using the transaction to support a broader hybridisation strategy in which battery systems are developed alongside its photovoltaic fleet. The company said the refinanced assets provide a platform for adding storage, reaching new customers, and increasing the flexibility and value of its renewable portfolio.
Miguel A. García Mascuñán, chief financial officer at Sonnedix, said the transaction offered “significant financial flexibility and capacity to accelerate our development pipeline across core markets”. That flexibility is relevant because adding storage changes both the operating profile and financing case of a solar asset.
A standalone photovoltaic plant produces according to available irradiation and normally exports when the wider solar fleet is also generating strongly. A battery can shift part of that output into later periods, manage export limits, reduce curtailment exposure, and support participation in balancing or ancillary-service markets where the rules permit.
The commercial value depends on connection rights, charging arrangements, dispatch strategy, market access, and the battery’s degradation and augmentation plan. Hybridisation can make better use of land, transformers, switchgear, metering, and grid infrastructure already associated with a solar site, but it does not remove the need for technical studies or amended connection agreements.
Protection settings, power conversion, control coordination, fire strategy, and the combined export envelope must all be assessed before a battery can be added. Existing infrastructure may reduce development time, although a retrofit remains an electrical-engineering project rather than a simple extension of the original solar plant.
Sonnedix recently expanded its Italian storage pipeline through the acquisition of two standalone battery projects in Tuscany totalling 260MW/1,040MWh. The €730 million financing is a separate development, but the sequence shows storage becoming part of the company’s wider funding and portfolio-management model.
Portfolio finance spreads risk and complexity
Sonnedix reports a total portfolio of 12GW, including more than 4GW in operation, over 1GW under construction, and a 6GW development pipeline. At that scale, financing can be arranged across groups of assets, allowing operational cash flows, construction requirements, and future development to be managed within a broader capital structure.
The approach can reduce duplication in due diligence, hedging, documentation, and lender engagement, particularly where an owner has repeat relationships with the same banks and advisers. It also spreads exposure across different electricity markets and revenue arrangements.
The trade-off is additional complexity. Legal frameworks, tax treatment, grid rules, subsidy mechanisms, and merchant-price exposure vary across Italy, Spain, Portugal, and France, while the inclusion of batteries introduces a revenue model that may draw on several markets rather than one contracted tariff.
The lender group was supported by separate legal, technical, tax, model-audit, hedging, and market-analytics advisers. That advisory structure reflects the scrutiny required when a financing combines established solar assets with storage projects whose performance depends on equipment availability, operating strategy, and changing market conditions.
For battery projects, bankability extends well beyond the cell supplier and headline megawatt-hour rating. Lenders examine power-conversion performance, availability guarantees, cycle assumptions, warranty conditions, thermal management, augmentation budgets, route-to-market contracts, and the credit quality of optimisers or offtakers.
Those considerations become more demanding as the revenue stack moves between energy arbitrage, balancing, ancillary services, capacity mechanisms, and bilateral contracts. A project designed around several revenue sources may be more flexible, but its financial model also contains more assumptions that must survive lender scrutiny.
Italy’s allocation of more than 350MW gives it particular significance within the package. The country is seeing simultaneous activity in standalone storage, solar-plus-storage, tolling arrangements, and state-supported procurement. Sonnedix’s position across photovoltaic generation and battery development gives it several routes to participate, although each project must still reach its own permitting, connection, financing, and construction milestones.
The €730 million close does not commission another megawatt of generation or storage. It removes one of the constraints that can prevent technically mature assets from progressing and provides a larger platform from which Sonnedix can structure hybrid projects. The next measure will be the number of connected systems capable of shifting renewable output when the network and electricity market value it most.