TE

terra.blue

Xolo Go OÜ

Tartu, Estonia

WindGeothermalEnergy StorageHydrogenOther
Profile last updated: August 14, 2026

About

terra.blue is a renewable energy company headquartered in Tartu, Estonia specializing in Wind, Geothermal, Energy Storage.

terra.blue is the website of independent advisor Dr. Walter L. Kuehnlein, offering strategic advisory, engineering review and consulting in energy systems, offshore wind, marine technology and ice engineering. Services include design review of offshore structures in ice-affected waters, rig move planning, concept development for energy storage and geothermal systems, and AI applications for energy and marine optimisation. The practice also runs NRG.Vision initiatives on smart and renewable energy and lectures at German universities.

Headquarters

Tartu, Estonia

Focus areas

energy consultingoffshore windice engineeringarctic engineeringmarine technologyenergy storagegeothermalgreen ammoniaartificial intelligencerenewable ocean energy

Products & services

Business models

B2B

Value chain

ConsultingAdvisoryEngineering

Service areas (1)

  • Energy, marine and ice technology advisory

    Independent strategic advisory, engineering review and consulting for energy systems, offshore wind, marine and ice-covered water projects, and AI applications in energy and marine technology.

Locations

Headquarters

Paju tn 1a, 50603, Tartu, Estonia

Projects

6

Rig Move with Parker Rig 257

Offshore drilling rig move

Responsible for the de-grounding and grounding operation of a rig in the North Caspian Sea.

Offshore wind park in part-time ice-covered waters

Offshore wind park

Consultant and design reviewer for an offshore wind park concept in ice-affected waters.

Closed Loop Hot Rock Geothermal System

Geothermal system

Concept study on developing a closed loop hot rock geothermal system.

EV Battery Swapping and BESS

Battery storage

Concept development for EV battery swapping and battery energy storage systems.

NRG.Vision VisionGuard AI

AI energy project

NRG.Vision project in the energy sector applying AI.

NRG.Vision GridSync AI

AI energy project

NRG.Vision project in the energy sector applying AI.

Credentials & affiliations

Industry memberships

German Association for Marine TechnologyGerman Offshore Committee (DNV)ASME Ocean, Offshore and Arctic Engineering Division

Partnerships

NRG.Vision

People

Management & team (1)

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