PROJECT EXPERIENCE

Many contexts.
One energy future.

Explore consulting assignments and earlier utility-sector experience in storage, hydropower and renewable integration.

Project references

Open a project for scope & context
Zambia / Zimbabwe (Lake Kariba)

Lake Kariba floating solar

HydroFPVHybridGridAfrican Development Bank
Start year2026

Hydrometeorology and hydropower expertise for a floating-solar feasibility study and integration with the existing hydropower system.

Project context
Zambezi River Authority / AfDB project · Norconsult / Dornier Suntrace
Assignment period
2026–present
Pakistan

Pakistan utility-scale battery storage

BESSGridAsian Development Bank
Start year2026

BESS sizing and technology advisory for feasibility and procurement preparation, including degradation, conceptual design and supplier-market assessment.

Project context
ADB / NGC–ISMO project · via CESI
Assignment period
2026–present
Cambodia

Cambodia utility-scale battery storage

BESSGridAsian Development Bank
Start year2025

BESS specialist support for project preparation and procurement, covering technical configuration, specifications and technical tender review.

Project context
ADB / Electricité du Cambodge project · via IES
Assignment period
2025–2026
India, West Bengal

Goaltore Phase II battery-storage procurement

BESSPVKfW
Start year2025

BESS technical requirements and tender-review support, with attention to safety, warranties, degradation and EMS/SCADA interfaces.

Project context
WBSEDCL / KfW project
Assignment period
2025–2026
Asia and Pacific

Regional BESS workshops and webinar

BESSAsian Development Bank
Start year2026

Training contributions on the German BESS market, battery recycling, circular economy, health and safety.

Project context
ADB regional programme · via INTEGRATION
Assignment period
May 2026
Nepal

Hydropower refurbishment market study in Nepal

Hydro
Start year2025

Research leadership and technical review of hydropower-refurbishment opportunities, sector capabilities and market recommendations.

Project context
Adam Smith International
Assignment period
Nov 2025–Feb 2026
Hydropower intake basin beside a river in a steep mountain valley in Nepal
Plant visit for a study of hydropower refurbishment opportunities.
Vietnam

Vietnam renewable-energy hybrid facilities

HydroFPVHybridPVGridWorld Bank
Start year2025

Hydropower and energy-system expertise for assessment of hydro–floating-PV integration and operating flexibility.

Project context
World Bank project · via Dornier Suntrace
Assignment period
2025–2026
Pakistan

Pakistan battery-storage technical regulation

BESSGridGIZ
Start year2025

Technical review and recommendations for BESS provisions in grid and distribution codes, including storage requirements and SCADA interfaces.

Project context
GIZ-funded project · INTEGRATION / GOPA Intec
Assignment period
2025–2026
Germany

Helminghausen outlet rehabilitation

HydroUniper
Start year2025

Project coordination, site inspections, construction supervision and quality monitoring for outlet rehabilitation at Diemeltalsperre.

Project context
Uniper Kraftwerke · via Dornier
Assignment period
Apr 2025–present
Armenia

Energy storage and transition in Armenia

PSHBESSGridAsian Development Bank
Start year2024

Energy-storage advisory and technical review covering batteries, pumped storage, renewable integration and the energy-transition roadmap.

Project context
Asian Development Bank
Assignment period
Nov 2024–present
Germany

Niederwartha industrial-load optimisation

PSHGrid
Start year2025

Operating and economic simulation of pumped storage with industrial demand, assessing dispatch, market prices and peak-load coverage.

Project context
BGH Edelstahl Freital
Assignment period
2025
Sri Lanka, Armenia, Bangladesh, Cambodia

Regional battery-storage advisory

BESSGridAsian Development Bank
Start year2024

Technical advisory and capacity building on BESS investment, use cases, project preparation and procurement across Asian Development Bank member countries.

Project context
Asian Development Bank
Assignment period
Dec 2024–Nov 2025
Philippines

Pumped-storage development in the Philippines

PSHGridUNOPS
Start year2024

Site-screening and prioritisation inputs, technical assessment and a project-development framework for pumped storage.

Project context
UNOPS project · INTEGRATION / IES
Indonesia

Sulawesi hydro–solar hybrid concepts

HydroFPVHybridPVGIZ
Start year2025

Pre-feasibility assessment of hydropower–solar integration, including hybrid modelling, turbine response and techno-economic inputs.

Project context
GIZ project · via Dornier Suntrace
Assignment period
2025
Sri Lanka

Sri Lanka INVEST-104 floating solar

HydroFPVHybridPVUSAID
Start year2022

Hydropower expert support for floating-solar pre-feasibility and hydro–PV integration under the INVEST-104 programme.

Project context
USAID / DAI INVEST-104 · via Dornier Suntrace
Kenya

Battery-storage training in Kenya

BESSUSAID
Start year2024

Training of trainers on BESS applications, system design, operation, safety and project economics.

Project context
Kenya Power · USAID Power Africa · EnerNex / CESI
Assignment period
Sep 2024
Peru

Pumped storage for a mining grid

PSHBESSHybridPV
Start year2024

Concept and economic assessment of pumped-storage options for a private mining grid, including hydraulic layouts and comparison with batteries.

Project context
Compañía Minera Poderosa
Assignment period
May–Jun 2024
Project team wearing safety helmets and high-visibility vests at a site in the Peruvian Andes
Project team at a prospective pumped-storage location in the Andes.
Germany

Franken hydropower pre-feasibility

HydroUniper
Start year2024

Technical concept and economic screening of hydropower generation using an existing cooling-water system.

Project context
Uniper · via Dornier Power and Heat
Assignment period
Apr–May 2024
Germany

Pumped storage for irrigation

PSHBESSHybridPV
Start year2024

Concept study and operating simulations for storage integrated with irrigation, frost protection and renewable generation.

Project context
LVWO Weinsberg
Assignment period
Jan–Mar 2024
Mexico

Floating-solar options in Mexico

HydroFPVHybridPVGridWorld Bank
Start year2024

Hydropower and hybrid-system assessment of floating-solar options, including operational constraints and control interfaces.

Project context
World Bank / CFE project · via Dornier Suntrace
Assignment period
2024
Burundi

Burundi hydropower tender design

HydroRural
Start year2023

Hydraulic design, technical specifications and tender-document preparation for a small-hydropower project.

Project context
Virunga Power · GFA / GET.invest project
Assignment period
Jun–Dec 2023
A group gathered on a hillside during a hydropower site visit in Burundi
Meeting on site during small-hydropower project preparation.
South Africa

Industrial pumped-storage feasibility

PSHBESSHybridPV
Start year2023

Pumped-storage concept design and technical and economic comparison with batteries for an industrial solar-energy system.

Project context
Oceana Group
Assignment period
Jul–Oct 2023
Mozambique

Chicamba hydro–solar hybrid study

HydroBESSFPVHybridPVGridAfrican Development Bank
Start year2023

Hydropower expert input to the assessment of floating solar and its integration with operation of the Chicamba hydropower scheme.

Project context
EDM / AfDB project · Norconsult / Dornier Suntrace
Madagascar

Belaoko–Lokoho electrification modelling

HydroBESSHybridPVRuralGridKfW
Start year2022

Long-term operating and expansion modelling of a standalone grid combining hydropower, solar PV and battery storage.

Project context
HIER-SAVA · KfW project
Assignment period
Apr–May 2022
Suriname

Afobaka floating-solar assessment

HydroBESSFPVHybridPVGridInter-American Development Bank
Start year2022

Hydropower and hybrid-operation inputs to floating-solar feasibility on the Afobaka reservoir.

Project context
IDB project · via Dornier Suntrace
Nepal

Pumped-storage screening in Nepal

HydroPSHRuralGrid
Start year2022

Screening of pumped-storage options, reservoir and water-availability assessment, concept sizing and preliminary cost analysis.

Project context
IMC Worldwide · APPIIC / OIBN project
Assignment period
Jul–Oct 2022
Sri Lanka

Sri Lanka grid-scale battery storage

BESSPVGridAsian Development Bank
Start year2022

Feasibility, site-selection and sizing assessment for battery storage, including operating strategies and technical procurement inputs.

Project context
Asian Development Bank
Assignment period
Jul–Dec 2022
Georgia

Georgia grid-scale battery storage

BESSGridAsian Development Bank
Start year2022

Battery-storage feasibility, technical procurement requirements and grid-code support for a grid-scale BESS project.

Project context
ADB project · via INTEGRATION
Assignment period
Dec 2022–2025
Aerial view of existing grid infrastructure and rocky hills at the BESS study site in Georgia
Existing grid infrastructure and the surrounding landscape in Georgia.
Sri Lanka

Sri Lanka hydro–solar hybrid assessment

HydroBESSFPVHybridPVGridWorld Bank
Start year2021

Assessment of floating and ground-mounted PV integration with hydropower, including turbine response, dispatch and control concepts.

Project context
World Bank project · via Dornier Suntrace / VPC
Rathkinda reservoir surrounded by wooded islands and hills in Sri Lanka
Reservoir landscape from the hydro–solar hybrid assessment in Sri Lanka.
Mongolia

Pumped-storage development in Mongolia

PSHGridAsian Development Bank
Start year2021

Technical review, site-selection inputs and preliminary concepts and cost assessment for pumped-storage development.

Project context
ADB project · via INTEGRATION
Italy

Terni hydropower assessment

Hydro
Start year2021

Technical condition assessment of hydropower assets, including site inspection, equipment review and lifecycle considerations.

Project context
LEAG · via VPC
Assignment period
2021
Jordan

Aquifer-based underground pumped storage

PSHHybridPVRuralGIZ
Start year2020

Preliminary assessment of an aquifer-based pumped-storage concept and solar integration for renewable-energy applications in the water sector.

Project context
GIZ project
Assignment period
2020
Germany

Gaildorf hybrid-storage operation

PSHBESSFPVHybrid
Start year2019

Operating simulations, dispatch and market concepts for pumped storage in a hybrid renewable-energy system.

Project context
Max Bögl Wind AG
Finland

Åland underground pumped-storage concept

PSH
Start year2019

Technical contributions to discussions on an underground pumped-storage pilot and its potential participation in frequency-control markets.

Project context
Pumped Hydro Storage AB
Assignment period
2019–2020
Guyana

Hydropower advisory for GEA

HydroBESSHybridPVRuralGrid
Start year2019

Technical review, project-development advice and mentoring for the Guyana Energy Agency’s hydropower portfolio.

Project context
Guyana Energy Agency (GEA)
Assignment period
2019–2023
Guyana

Parliament Building solar and storage

BESSPV
Start year2018

Installation coordination and grid-integration support for solar PV and battery storage at Guyana’s Parliament Building.

Project context
Ministry of the Presidency · Guyana Energy Agency
Assignment period
2018
Guyana

Tiger Hill low-head hydropower

Hydro
Start year2017

Site exploration, feasibility assessment and preliminary technical concepts for a low-head hydropower opportunity serving Linden.

Project context
Guyana Energy Agency
Assignment period
2017
Guyana

Solar PV and battery microgrid

BESSPVRural
Start year2017

Design and specification support for a remote PV–battery microgrid, including installation and commissioning support.

Project context
Hinterland Electrification Company
Assignment period
2017
Guyana

Kato hydropower development

HydroBESSPVRuralGridInter-American Development Bank
Start year2016

Hydropower design, demand assessment and tender preparation for electricity supply to a village and secondary school.

Project context
Ministry of Public Infrastructure, Guyana · IDB project
Guyana

Hosororo small hydropower

HydroRuralGrid
Start year2016

Feasibility, detailed design and construction and commissioning support for the Hosororo hydropower project.

Project context
Guyana Energy Agency (GEA)
Assignment period
2016–2018
Three people beside a small hydropower turbine and control panel inside the Hosororo powerhouse in Guyana
Technical work inside the Hosororo powerhouse during commissioning.
Aerial view of Hosororo's red-roofed powerhouse and penstock surrounded by rainforest in Guyana
Powerhouse and penstock within the tropical landscape of Guyana.
Guyana

Kumu hydropower development

HydroBESSPVRuralGrid
Start year2016

Hydropower concept development, feasibility assessment, demand and generation analysis, and site-layout studies.

Project context
Guyana Energy Agency
Guyana

Moco-Moco hydropower upgrade concept

HydroBESSPVRuralGrid
Start year2016

Feasibility, upgrade design and procurement preparation for rehabilitation of the Moco-Moco hydropower station.

Project context
Guyana Energy Agency
Guyana

Hydropower capacity building in Guyana

HydroBESSPVRuralGrid
Start year2016

Training and mentoring for hydropower engineers, alongside technical support for project preparation and development.

Project context
Guyana Energy Agency (GEA)
Assignment period
2016–2018
Guyana

Kaieteur Falls flow-turbine concept

HydroRural
Start year2016

Site surveys and technical assessment of underwater flow-turbine options in a protected-area setting.

Project context
Protected Areas Commission
Assignment period
2016
Guyana

Pico pumped storage for rural electrification

PSHPVRuralGrid
Start year2016

Site surveys and concept development for small pumped-storage systems combined with solar PV in remote communities.

Project context
Ministry of Indigenous Peoples Affairs
Assignment period
2016–2019
Germany

Long-duration pumped-storage concept

PSHVattenfall
Start year2014

Feasibility assessment of a long-duration storage concept connecting existing reservoirs, including hydraulics, operating modes and economics.

Project context
Vattenfall Europe Generation
Assignment period
2014
Germany

Saale hydropower cascade optimisation

HydroGridVattenfall
Start year2013

Flow modelling and coordinated operation of a run-of-river cascade, including integration into secondary-control processes.

Project context
Vattenfall Europe Generation
Assignment period
2013–2014
Germany

Pumped-storage potential in Saxony

PSH
Start year2013

Candidate-site concepts, market analysis and cost assessment for potential pumped-storage development in Saxony.

Project context
State Ministry of Economy Saxony
Assignment period
2013
Germany

Virtual pumped-storage fleet

PSHGridVattenfall
Start year2012

Coordinated operating and control concepts for a fleet of pumped-storage units, including water management and operational planning.

Project context
Vattenfall Europe Generation
Germany

Ziegenrück small-hydro rehabilitation

HydroVattenfall
Start year2012

Engineering, procurement coordination and construction and commissioning support for small-hydropower rehabilitation.

Project context
Vattenfall Europe Generation
Assignment period
2012–2014
South Africa

Ingula construction support

PSH
Start year2012

Technical expert support during pumped-storage construction and commissioning preparation, including risk and interface review.

Project context
ESKOM
Germany

Hohenwarte II hydraulic short circuit

PSHGridVattenfall
Start year2012

Concept assessment and testing of hydraulic short-circuit operation to extend pumped-storage flexibility and control capability.

Project context
Vattenfall Europe Generation
Assignment period
2012
Germany

Pumped storage in a former lignite mine

PSH
Start year2012

Feasibility assessment of reservoir, hydraulic and machinery concepts for pumped storage in a former mining area.

Project context
MIBRAG AG
Assignment period
2012
Germany

Hydropower and pumped-storage asset management

HydroPSHVattenfall
Start year2011

Condition assessment and lifecycle-risk analysis to support refurbishment priorities and investment planning across a hydropower portfolio.

Project context
Vattenfall Europe Generation
Assignment period
2011–2014
Greece

Plastiras hydropower modernisation

Hydro
Start year2011

Equipment assessment, life-extension planning and refurbishment options for the Plastiras hydropower plant.

Project context
PPC, Greece
Assignment period
2011
Germany

Niederwartha rehabilitation concept

PSHGridVattenfall
Start year2011

Hydraulic-transient analysis and technical concepts for pumped-storage rehabilitation and component modernisation.

Project context
Vattenfall Europe Generation
Lithuania

Kruonis pumped-storage extension

PSH
Start year2011

Technical support for extension options, equipment configuration and operational flexibility at the Kruonis pumped-storage plant.

Project context
Lietuvos Energija AB
Assignment period
2011
Germany

Ringwall pumped-storage concept

PSHGrid
Start year2011

Concept development for pumped storage in flat terrain, covering reservoir configuration, hydraulic layout and flexible operating modes.

Project context
WEMAG AG
Assignment period
2011
Germany

Micro pumped storage in former mining sites

PSHVattenfall
Start year2010

Feasibility assessment of small pumped-storage systems in disused mining areas, including reservoir layouts, hydraulics and economic screening.

Project context
Vattenfall New Energy
Assignment period
2010
Germany

Goldisthal pumped-storage operation

PSHGridVattenfall
Start year2010

Coordinated operating concepts, water management and control logic for the Goldisthal pumped-storage units.

Project context
Vattenfall Europe Generation
Assignment period
2010–2011

Organisations are shown in their project context, including utilities, funding institutions and consulting partners. Historical assignments may predate REESSA Consulting.

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tobias@reessaconsulting.org

Dipl.-Ing. Tobias Dertmann
Independent Energy Storage Consultant

REESSA Consulting UG
Priorsheide 10
58730 Fröndenberg/Ruhr
Germany