Why a solar cadastre?
Today, communities need to offer their residents and professionals a simple and effective way to assess the solar potential of their rooftops and parking surfaces.
Solar Cadastre is a tool that fits perfectly into a renewable energy development action plan.
Stages of a solar cadastre’s setup
1Shading calculation
The 3D representation of the territory is the raw material for the production of a solar cadastre.
We base our shading calculations on the latest national geographic institutions data with an accuracy of 25 cm in planimetry. All elements specific to the roof (chimney, roof windows, etc.) and surroundings (trees, other buildings, terrain) are taken into account in the solar survey.
We can also base our calculations on the 3D model of the city buildings when available, which allows us to have a geometric distinction of each side of the roofs in the solar cadastre.
2Solar energy received by each roof
Archelios MAP computes the solar trajectory hour by hour for each month of the year, taking into account the shading calculated in step 1.
The algorithms come from Archelios PRO, considered as the most accurate production forecasting software in the world by 2 independent international studies.
3Integrative Results in Community GIS
The results of the irradiation calculations are provided to the community in the form of standard GIS files (SHAPE and ESRI grid formats). These become the full property of the community upon receipt and may be exploited without copyright or any other commercial limit.
GIS files allow the community to cross the data of the solar cadastre with all the geographical data at their disposal. They can easily identify the most interesting rooftop on their territory or their own buildings, so as to encourage or initiate the most promising photovoltaic projects.
4Online Publication
The solar cadastre is made available to the general public and professionals of the territory via our internet application.
This application has been designed to be easy-to-use, intuitive and ergonomic. It adapts to all screens (smartphone, tablets, computers) and it is compatible with all popular Internet browsers (Chrome, Internet Explorer 11, Firefox, Edge, Safari).
Who are we?
Cythelia Energy has been a reference for more than 20 years, helping their customers throughout the lifecycle of solar projects, from the feasibility studiy to the complete project management of execution and construction.
Cythelia Energy designed Archelios suite, which is dedicated to PV from Design to Operations. The forecast production calculations made with Archelios PRO are the most accurate in the world, according to 2 independent international studies.
All our solar cadastres made by us today
The solar cadastre of
Grand Annecy
KEY DATA
The solar cadastre of
Bordeaux and its region
KEY DATA
Community testimonials
The solar cadastre is a formidable tool that is fully into keeping on with the Climate Plan and the ambitious energy transition objectives of Positive Energy Transition. The solar cadaster really encourages citizens to install photovoltaic panels on their rooftops.

The solar cadastre helped us sensitize the population of Bordeaux on the solar potential of their rooftops, thanks to a simple and precise visualization in a few clicks. It is an integral part of our action plan in the energy field.







