Stratos Vlasakidis

General Manager, Five Hundred  ·  ICT Entrepreneur  ·  Microsoft 365 & Solar O&M Specialist

Background

Stratos Vlasakidis has spent the better part of a decade watching solar operations teams drown in spreadsheets, WhatsApp threads, and PDF reports that arrive a week after the fault was fixed. That gap — between what is happening in the field and what management can actually see — is expensive. Not just in direct repair costs, but in the compounding inefficiency of decisions made on stale data.

That problem is what Five Hundred is built to solve. Stratos leads Five Hundred as General Manager, overseeing product direction, enterprise partnerships, and customer deployments for solar O&M operators managing portfolios from 50MW to multi-GW scale across Europe.

His background is in ICT and digital transformation. Before focusing on renewable energy, he worked across multiple industries helping organisations build operational software on the Microsoft 365 ecosystem — Power Apps, Power Automate, Dataverse, Teams, and Azure. He came to solar because the operational complexity is high, the data infrastructure is often inadequate, and the cost of getting it wrong is measured in megawatt-hours, not server credits.

WIZSP, the company behind Five Hundred, was founded on the principle that enterprise software should be deployed into the client’s own environment — not hosted on a third-party’s servers and billed back monthly. That architecture is not an accident. It is a deliberate position against the SaaS model’s structural incentives: to keep your data on their infrastructure, to charge for seat growth, and to make migration painful enough that switching feels impossible. Five Hundred installs software. It does not host data. Every Five Hundred deployment lives inside the client’s own Microsoft Azure tenant, governed by their security team, audited by their policies.

The work Stratos focuses on day-to-day sits at the boundary between operational engineering and software architecture: understanding exactly how a 300MW portfolio runs its preventive maintenance cycles, how SCADA alarms get triaged into work orders, how technician certifications expire and nobody notices until an inspection. Then building systems that eliminate each of those failure modes, inside tools the client already owns and knows how to govern.

Stratos has been involved in the technology and startup ecosystem for most of his career — participating in innovation forums, building partnerships with European software vendors, and representing the perspective that enterprise-grade software does not have to mean enterprise-grade complexity. His collaborations have included strategic partnerships with firms like skybow AG to extend low-code capability on the SharePoint and M365 stack.

Credentials & Specialisations

  • Role: General Manager, Five Hundred (WIZSP SRL)
  • Specialisations: Solar O&M platform architecture, Microsoft 365 Power Platform, digital transformation strategy, enterprise CMMS deployment, SCADA-to-workflow integration
  • Platform Expertise: Microsoft Power Apps · Power Automate · Dataverse · Power BI · Microsoft Teams · Azure Entra ID
  • Industry Focus: Utility-scale and commercial solar O&M, renewable energy operations, critical infrastructure software
  • Experience: 9+ years designing and deploying Microsoft 365-native enterprise applications
  • Partnerships: Microsoft Partner · skybow AG (low-code SharePoint extensions)
  • Published on: Solar CMMS, SCADA integration, O&M digital transformation, Microsoft 365 for renewable energy operators
  • LinkedIn: linkedin.com/in/stratosvlasakidis

“Sunlight takes exactly 500 seconds to travel from the Sun to Earth. Every time you look at the Sun, you are seeing it as it was eight minutes and twenty seconds ago. I named this platform Five Hundred because that lag is unavoidable in physics — but operational lag in your solar assets is not. The entire product exists to close that gap: to make sure that when something fails at a solar park, the right technician knows about it before the system loses another hour of generation. Solar operations, built to last. Not to rent.”

— Stratos Vlasakidis, General Manager, Five Hundred

Published Articles & Insights

Stratos writes on the operational and technical challenges facing solar O&M teams as they scale. All articles are published on Five Hundred Articles & Insights.

Work Together

If you are evaluating O&M software for a solar portfolio running on the Microsoft 365 ecosystem, Stratos is the right person to start with. No sales pitch — just a direct conversation about whether Five Hundred fits your operational model and what deployment would actually look like for your team.