Helios Nexum

About the Model Developer Orestis Delardas is fluent in both the physics of energy systems and the language of institutional finance. Armed with a BEng in Electrical Engineering, an MSc in Energy Economics from UCL, a CEM designation, and formal training in investment analysis, capital markets, and risk — he operates where grid constraints meet capital structures. A peer-reviewed researcher and AEE Europe presenter, his models reflect how energy projects are actually built, financed, and scrutinised. What This Means for the Models The financial models offered through this platform are designed for professionals who need tools that go beyond surface-level templates. Each model is built with a clear engineering foundation — reflecting real system behaviour, technology-specific cost structures, and operationally grounded assumptions — while being structured to meet the analytical demands of project finance, investment appraisal, and strategic planning. Whether evaluating a utility-scale renewable energy project, stress-testing a financing structure, or building a business case for an energy infrastructure investment, the models here are designed to offer a rigorous, transparent, and adaptable starting point. Every assumption is documented, every output is traceable, and the structure is designed to be understood, interrogated, and modified — not treated as a black box. The combination of engineering discipline, financial training, and active research engagement that defines Orestis's professional profile is what sets these models apart. They are purpose-built tools developed by someone who understands energy systems from the physics of generation through to the financial close of a project — and who has spent years working at the boundary where those two worlds meet. Who These Models Are For These models are suitable for energy developers, project finance teams, independent power producers, advisory firms, infrastructure investors, sustainability professionals, and researchers who need analytically rigorous, professionally structured tools. They are built to be used in real investment decisions, and real reporting environments — and are priced and packaged accordingly.

by Helios Nexum

Helios Nexum – Solar & Battery Storage Financial Model

Helios Nexum is a professional Excel-based financial simulation model purpose-built…