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 & contextZambia / Zimbabwe (Lake Kariba)Lake Kariba floating solar
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
PakistanPakistan utility-scale battery storage
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
CambodiaCambodia utility-scale battery storage
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 BengalGoaltore Phase II battery-storage procurement
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 PacificRegional BESS workshops and webinar
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
NepalHydropower refurbishment market study in Nepal
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

VietnamVietnam renewable-energy hybrid facilities
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
PakistanPakistan battery-storage technical regulation
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
GermanyHelminghausen outlet rehabilitation
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
ArmeniaEnergy storage and transition in Armenia
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
GermanyNiederwartha industrial-load optimisation
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, CambodiaRegional battery-storage advisory
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
PhilippinesPumped-storage development in the Philippines
Start year2024
Site-screening and prioritisation inputs, technical assessment and a project-development framework for pumped storage.
- Project context
- UNOPS project · INTEGRATION / IES
IndonesiaSulawesi hydro–solar hybrid concepts
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 LankaSri Lanka INVEST-104 floating solar
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
KenyaBattery-storage training in Kenya
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
PeruPumped storage for a mining grid
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

GermanyFranken hydropower pre-feasibility
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
GermanyPumped storage for irrigation
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
MexicoFloating-solar options in Mexico
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
BurundiBurundi hydropower tender design
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

South AfricaIndustrial pumped-storage feasibility
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
MozambiqueChicamba hydro–solar hybrid study
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
MadagascarBelaoko–Lokoho electrification modelling
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
SurinameAfobaka floating-solar assessment
Start year2022
Hydropower and hybrid-operation inputs to floating-solar feasibility on the Afobaka reservoir.
- Project context
- IDB project · via Dornier Suntrace
NepalPumped-storage screening in Nepal
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 LankaSri Lanka grid-scale battery storage
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
GeorgiaGeorgia grid-scale battery storage
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

Sri LankaSri Lanka hydro–solar hybrid assessment
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

MongoliaPumped-storage development in Mongolia
Start year2021
Technical review, site-selection inputs and preliminary concepts and cost assessment for pumped-storage development.
- Project context
- ADB project · via INTEGRATION
ItalyTerni hydropower assessment
Start year2021
Technical condition assessment of hydropower assets, including site inspection, equipment review and lifecycle considerations.
- Project context
- LEAG · via VPC
- Assignment period
- 2021
JordanAquifer-based underground pumped storage
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
GermanyGaildorf hybrid-storage operation
Start year2019
Operating simulations, dispatch and market concepts for pumped storage in a hybrid renewable-energy system.
- Project context
- Max Bögl Wind AG
FinlandÅland underground pumped-storage concept
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
GuyanaHydropower advisory for GEA
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
GuyanaParliament Building solar and storage
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
GuyanaTiger Hill low-head hydropower
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
GuyanaSolar PV and battery microgrid
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
GuyanaKato hydropower development
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
GuyanaHosororo small hydropower
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


GuyanaKumu hydropower development
Start year2016
Hydropower concept development, feasibility assessment, demand and generation analysis, and site-layout studies.
- Project context
- Guyana Energy Agency
GuyanaMoco-Moco hydropower upgrade concept
Start year2016
Feasibility, upgrade design and procurement preparation for rehabilitation of the Moco-Moco hydropower station.
- Project context
- Guyana Energy Agency
GuyanaHydropower capacity building in Guyana
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
GuyanaKaieteur Falls flow-turbine concept
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
GuyanaPico pumped storage for rural electrification
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
GermanyLong-duration pumped-storage concept
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
GermanySaale hydropower cascade optimisation
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
GermanyPumped-storage potential in Saxony
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
GermanyVirtual pumped-storage fleet
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
GermanyZiegenrück small-hydro rehabilitation
Start year2012
Engineering, procurement coordination and construction and commissioning support for small-hydropower rehabilitation.
- Project context
- Vattenfall Europe Generation
- Assignment period
- 2012–2014
South AfricaIngula construction support
Start year2012
Technical expert support during pumped-storage construction and commissioning preparation, including risk and interface review.
- Project context
- ESKOM
GermanyHohenwarte II hydraulic short circuit
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
GermanyPumped storage in a former lignite mine
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
GermanyHydropower and pumped-storage asset management
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
GreecePlastiras hydropower modernisation
Start year2011
Equipment assessment, life-extension planning and refurbishment options for the Plastiras hydropower plant.
- Project context
- PPC, Greece
- Assignment period
- 2011
GermanyNiederwartha rehabilitation concept
Start year2011
Hydraulic-transient analysis and technical concepts for pumped-storage rehabilitation and component modernisation.
- Project context
- Vattenfall Europe Generation
LithuaniaKruonis pumped-storage extension
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
GermanyRingwall pumped-storage concept
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
GermanyMicro pumped storage in former mining sites
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
GermanyGoldisthal pumped-storage operation
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
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Organisations are shown in their project context, including utilities, funding institutions and consulting partners. Historical assignments may predate REESSA Consulting.
Dipl.-Ing. Tobias Dertmann
Independent Energy Storage Consultant
REESSA Consulting UG
Priorsheide 10
58730 Fröndenberg/Ruhr
Germany