Autor

Who writes, and why

These books are written in Romanian.

Marius Ion writes practical books about energy in Romania. He is founder, president, and chief executive of Energy Investment LLC and develops renewable energy projects.

The books do not replace technical, legal, or financial analysis. They ask the questions worth having before a decision.

Why these three books exist

Photovoltaic Parks and Storage - 2026 Edition

The book is for investors who are assessing photovoltaic parks and storage and want to ask the questions about land, grid connection, EPC, and operation before they sign.

I want the guide for investors

Prosumer in Romania - 2026 Edition

The book is for prosumers: households, companies, and farms that compare offers and want to start from their own site, not from the number of panels.

I want the guide for prosumers

One Stop Shop - Vision and My or Others Nightmare

The book is a general vision of a circular energy value chain. It does not describe internal plans and it is not an investment offer.

I want to read the vision

Public brands

These are public activities, not an internal plan and not a list of confidential projects.

PV Park

Public brand for developing and building photovoltaic plants, from permits through to grid connection. The site presents it in connection with Energy Investment LLC.

Public site: pvpark.ro

BESS Romania

Public site about battery storage systems for companies and for larger projects. The description here does not repeat yield promises or portfolio figures.

Public site: bessromania.com

Finantare Energie

Public advice on identifying and preparing applications for non-reimbursable energy funds. It is not a promise that funding will be approved.

Public site: finantare-energie.ro

Energy Investment

Energy Investment LLC presents itself publicly as a renewable energy developer, with development, construction, financing, and procurement services. We do not repeat capacity figures here.

Public site: energyinv.com