Renewable energy systems engineering
End-to-end engineering, from preliminary design to works supervision or owner's assistance, supporting each project from identification through to performance monitoring after commissioning.
About
Coherent Habitat & Energy Solutions
Hacsé is an independent engineering firm specialising in the technical and financial engineering of renewable energy systems, environmentally responsible construction projects and programmes providing access to water and electricity in rural areas.
Founded in France in 2007, Hacsé works in photovoltaics and bioclimatic construction while continuing to develop rural electrification and drinking water access projects internationally.
As an independent, human-scale structure, Hacsé gives its clients a responsiveness and flexibility that few large consultancies can offer, while drawing on a broad international network of expertise mobilised according to each project's specific needs.
Etienne Sauvage
ESPCI / ENSAM engineer
25 years of experience
Began his career in 2000 at the Transénergie engineering firm in Madagascar, before founding Hacsé in 2007.
+20
years of experience
400+
references
30
countries
5
continents
Areas of expertise
Complete engineering for every project
From preliminary design to works supervision, Hacsé has the technical, organisational, economic and financial skills to support renewable energy projects.
Rural electrification through mini-grids and solar kits
From large individual-kit electrification programmes to stand-alone mini-grids powered by hybrid plants, Hacsé has been supporting the sustainable deployment of facilities for 20 years, in more than 30 countries.
Agricultural photovoltaics
As the photovoltaic advisor to farmer groups, chambers of agriculture and agricultural trade unions, Hacsé has been supporting agricultural project owners since 2008, with more than 300 installations in operation.
PV/Diesel hybrid systems
Field experience focused on designing and operating hybrid systems that combine conventional and renewable sources, continuously informed by the monitoring of installations in operation.
Stand-alone sites & storage
For operators running activities in isolated locations — green hospitality, industry, health centres, telecoms — Hacsé designs and builds electricity generation systems based on local resources.
PV systems engineering
Expertise recognised nationally and internationally, both in grid-connected systems and stand-alone applications, called upon for standards development, audits and R&D programmes.
Our services
Tailored support at every stage
Feasibility studies
Upstream studies covering technical and economic aspects as well as institutional constraints, for projects of any scale. From opportunity assessment to the drafting of tender documents.
Works supervision & site management
Management of projects under public (French MOP law) or private works supervision contracts, in France and on rural electrification programmes. Supervision of complex renewable energy sites and training of local teams.
Owner's assistance
Support for public and private project owners at every stage of their renewable energy or energy-efficiency project, from defining the need to handover of the works.
Expertise, diagnosis & performance analysis
In-depth technical expertise for project owners, their legal departments and insurers, and analysis of complex failures for installers. Instrumentation of facilities to measure actual energy performance.
Yield assessment & due diligence
Production forecasting models, P50-P90 analyses and independent reviews for large-scale grid-connected photovoltaic plants. Fully independent analyses, valued by banks and financial institutions.
Socio-economic studies & surveys
Preparatory studies for rural electrification projects to accurately assess electricity demand, carried out by local and international NGOs with in-depth knowledge of socio-cultural contexts.
Support for water & energy programmes internationally
Assistance to government agencies and international organisations in preparing their project documents: strategies, methodologies, logical frameworks, budgets and procurement plans.
Training
Technical training in photovoltaics, hybrid systems and small-scale wind power. QualiPV- and QualiPhoton-accredited trainer. Several hundred installers and engineers trained across five continents.
Research & development, publications
Contribution to research projects, review of technical documents and participation in professional working groups. Etienne Sauvage is co-author of “ Électrifier l'Afrique rurale” (Observ'ER, 2019) and of the “ Guide méthodologique pour l'électrification rurale par mini-réseau”.
Audit & evaluation
Evaluations of rural electrification projects for decision-makers and donors: technical audit, socio-economic and organisational framework assessment, upstream, at mid-term and after implementation.
Clients & partners
They trust us
Our diverse client base brings together public and private stakeholders, in France and internationally.
hacsé Works with
hacsé Is a member of professional networks
hacsé Provides expertise to
Projects & assignments
The field in pictures
Over 25 years of applied engineering and technical audits in the most demanding and remote conditions. Sub-Saharan Africa, deserts, South-East Asia, island territories and overseas...
Documents
Download our documents
Let's talk about your project and your search for an independent expert
Independent engineering, contractual responsiveness and absolute technical neutrality across the entire photovoltaic and hybrid value chain.
Response time: within 24 to 48 working hours
Office: Chinon (37) / Indre-et-Loire / France
Assignments: France and worldwide