Enel appears to be a large, investment-grade-style utility group with substantial operating scale and access to capital markets, which generally supports hybrid bond issuance.

Key factors supporting suitability:
- Very large revenue base: revenue rose to €140.5bn in 2022 from €85.7bn in 2021.
- Positive operating profitability: operating profit increased to €11.2bn from €7.6bn.
- Positive net profit: profit was €2.9bn in 2022, despite a large loss from discontinued operations.
- Positive operating cash flow: cash flow from operating activities was €8.7bn.
- Large asset base: total assets were €219.6bn at year-end 2022.
- Existing hybrid bond track record: equity instruments/perpetual hybrid bonds were €5.6bn at both 2022 and 2023 year-end, indicating the company has already issued and maintained hybrids.
- Dividends continued to be paid and proposed, suggesting management confidence and continued shareholder distributions.

Key concerns:
- Leverage is high: liabilities were €177.5bn versus equity of €42.1bn, and long-term borrowings increased materially to €68.2bn.
- Free cash flow pressure: investing cash outflows were significant, with investing cash flow of -€13.6bn, exceeding operating cash flow.
- Net profit declined year-on-year, mainly due to discontinued operations.
- Cash flow from operating activities declined from 2021.

Overall, the company has high leverage and capital intensity, but its size, regulated/utility profile, positive operating cash generation, continued profitability, and existing hybrid bond market access make it suitable for hybrid issuance. The elevated debt burden prevents an unqualified “Strongly Suitable” assessment.

<answer>Marginally Suitable</answer>