Up to −50% off the energy bill for your organisation, without investing in solar panels
RaYSun connects businesses, public bodies, non-profits and co-owned buildings within local energy communities in Belgium. End-to-end support, set up in 3 simple steps — no jargon, no technical complexity to manage yourself.
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What is an energy community?
An energy community brings together several organisations — businesses, public bodies, co-owned buildings — that produce, share and consume locally generated renewable electricity (usually solar) together. In practice: the solar surplus of a producing building is sold directly to one or more consuming buildings nearby, at a better price than the standard supplier tariff — bypassing the traditional commercial channel.
RaYSun takes care of everything else: matching, contracts, technical setup and follow-up.
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Two B2B support models, one goal: cutting your electricity bill
Tailored to the size and maturity of your energy project.
Energilia
Join an existing sharing operation
Ideal for a simple start, without complexity.
- You own solar panels and want to get more from your surplus
- Your company pays too much for electricity
Dedicated support
Create your own sharing operation
Total flexibility, co-built with our experts.
- You have several sites to connect together
- You are an organisation bringing together several companies
RaYSun handles everything, from analysis to monthly management
No technical or administrative burden on your side: RaYSun manages the entire process.
Free assessment
In 15 minutes, we analyse your consumption or production profile and estimate your savings potential with our simulator.
Setup & matchmaking
RaYSun structures your community legally and technically — or plugs you into an existing sharing operation (Energilia). Contracts, regulator filing and producer/consumer matching included.
Management & continuous optimisation
Monthly monitoring of energy flows, automated billing, clear reporting and adjustments to maximise your savings over time.
What our members say
Do you recognise your organisation here?
Your energy bill keeps climbing and you have no real lever to bring it down.
Your solar panels produce a surplus that nobody is properly valuing.
You manage several sites and pay for energy twice instead of sharing it between them.
You want green, local energy, but the legal and administrative setup holds you back.
You were told that setting up an energy community takes months of complexity — and that stopped you.
No worries. That's exactly why RaYSun exists — and it's sorted in 3 steps, described below.
Two areas of expertise, one field: energy sharing
RaYSun is both an engineering consultancy and an energy community manager in Belgium: we design communities upfront, then run them day to day. This dual role, rare on the market, is what makes our projects reliable.
Simulate accurately, before investing
We study and size energy communities for public and private players, with a tool we built ourselves.
- Responses to public tenders: municipalities, intermunicipal bodies, institutions
- Feasibility and profitability studies for private players
- Proprietary simulator able to model complex communities — allocation keys, tariff structures, market prices
- Assumptions calibrated on the real-world experience of the communities we manage
Running the community, from A to Z
Une communauté d’énergie ne s’arrête pas à sa création : c’est un organisme vivant. En tant que gestionnaire de communauté d’énergie, RaYSun l’administre au quotidien pour ses members.
- Authorisation procedures and community registration with the regulators
- Legal structuring and management of all contractual aspects
- Financial structuring of the operation
- Billing of exchanges and payment follow-up, reminders included
- Adding and removing members, onboarding newcomers
- Continuous optimisation of allocation keys
- Relations with grid operators (DSOs), energy regulators and suppliers
Here's exactly what your journey with RaYSun looks like
No black box: this is the real process, step by step.
Assessment & simulation
Discovery call (30 min), analysis of your consumption/production profile, quantified simulation of your potential savings.
Legal & technical setup
Choice of model (Energilia or dedicated support), regulator filing, matching with partner producers/consumers, contract signing.
Go-live & monthly management
Energy sharing goes live, automated billing, monthly reporting and continuous adjustments to maximise your savings.
A solution designed for organisations, not isolated individuals
RaYSun structures and manages energy communities between organisations : industrial sites, offices, shops, public buildings, co-owned buildings. If you represent an entity that consumes or produces electricity, RaYSun has a model for you.
Multi-site companies
Share the energy produced at one site with your other buildings.
Public bodies & non-profits
Pool solar production across several public buildings or members.
Co-owned & residential buildings
Give tenants and owners access to cheaper local energy.
Solar producers
Turn your production surplus into value by sharing it at a fair price.
Concrete results for our B2B members
334 supply points already share their energy
Each dot is a municipality where members of our communities consume or produce. The network covers all three regions of the country.
The size of a dot reflects the number of connected meters in the municipality. Out of respect for our members' confidentiality, no precise address is shown.
B2B communities coming to life
For each community, the study chart shows each member's annual energy flows (in MWh):
La Brasserie Du Bocq
Two brewery sites, one producer and one consumer — plus their neighbours. RaYSun's study on real profiles identifies 195 MWh shareable each year across the 4 metering points.
Bzzz Energy — BuzzyPark Wavre
8 companies in Wavre's northern business park (Menuisol, Delitraiteur, LACA, Quimesis…) share the output of 239 kWp of panels: over a third of their needs covered by the community.
Fico Energy
Around FICO's HQ in Aalst and Haaltert, 13 members — including Wanaka, Indigo and Meerschman — consume the electricity from the 964 panels (421 kWp) installed on the park's roofs.
Heidelberg Materials
The first major industrial player to connect its Walloon sites and partners in its own sharing operation: quarries and cement plants in Quenast, Beez, Telliers… as part of its low-carbon strategy.
Facq Wallonie
Facq's Walloon sites — from Alleur to Gosselies via Jambes and Arlon — connected in a single sharing operation: a quarter of their needs covered internally.
Facq Vlaanderen
The sister operation in Flanders: 26 Facq stores and logistics centres, from Merelbeke to Zaventem, switch from an individual to a collective logic.
Wanele
Buildings owned by several parties — industrial players and builders in the lead — share their surplus with the business park's consumers: nearly half of all needs covered locally.
Hannut business park
Goossens, Destexhe, Polycar, Ampi, SPS and their neighbours on the business park exchange electricity to cut the monthly bill. And this is just the beginning.
Centracar
Centracar's centres in Eupen, Baelen, Alleur, Jemeppe and Chaineux share the surplus of their producing sites: nearly a quarter of needs covered by the community.
Municipality of Rixensart
Schools and social-services buildings in Rixensart — including the care home and the Genval school — share the municipal solar production, a first step before opening up to citizens.
Municipality of Auderghem
The municipality is studying sharing between 11 public buildings — town hall, sports centre, gymnasium, stadium, crèches and schools — to make the most of municipal solar production locally.
Novandi
A dedicated community between the Novandi group's buildings: the producing sites power the group's other buildings and their partners.
Lock’o
The solar surplus of the Lock'o sites, from Frameries to the chaussée de Tirlemont, is shared with all the operation's consumers: nearly 860 MWh of value each year.
Energilia Brussels
A sharing operation at the scale of the Brussels region: hotels, shops, distributors, non-profits and local producers share their electricity — with no grid fees in Brussels.
Energilia Wallonie
A region-wide sharing operation: industrial players, logistics companies, distributors, non-profits and business parks — varied profiles for an excellent self-consumption rate.
Everything organisations ask before getting started
RaYSun is a B2B solution: we support businesses, public bodies, non-profits and co-owned buildings. Individuals can join a community as members of an existing operation, but our support is structured for organisations.
The initial assessment takes about 15 minutes. Joining an existing sharing operation via Energilia can be done in a few weeks. Creating a dedicated community generally takes 2 to 4 months depending on the project's administrative and technical complexity — see the details in "your journey" above.
No. You can join a community as a consumer only, a producer only, or both. RaYSun handles the matching between profiles.
RaYSun takes care of the legal structuring, the filing with the competent regulator and the ongoing compliance of your sharing operation.
We support organisations across the Benelux and France, with a strong presence in Belgium.
No. You keep your current supplier and contract. Shared energy comes on top: the share supplied by the community is billed separately, the rest continues to be delivered by your supplier as it is today.
Yes, a smart meter able to measure your consumption per quarter-hour ("metering regime 3" in Wallonia). If you don't have one yet, RaYSun guides you step by step to activate it with your supplier and grid operator.
No, and that's normal: in our communities, the share supplied through sharing averages 30% of members' consumption. The balance is still supplied by your regular supplier — it's the combination of both that lowers the overall bill.
The initial assessment is free and without obligation. Support fees then depend on the chosen model (joining an existing operation or creating your own) and are presented with full transparency before any signature — no hidden fees.
Yes. The entry and exit terms are clearly defined in the sharing agreement signed by each member. You stay in control: leaving the operation doesn't change your electricity supply contract.
Your quarter-hourly data is used only to calculate the allocation of shared energy and the operation's billing, in line with GDPR. It is never resold or shared with third parties.
By joining an existing energy community such as Energilia: you access local solar power produced by other members, billed below your supplier's tariff — without investing in panels or changing your installation. The average reduction seen in our communities is 26% on the energy bill.
Yes. That's the very principle of energy sharing: nearby producers inject their solar surplus into the grid, and you consume it through your smart meter. You get green, local electricity with no suitable roof, no works and no upfront investment.
How much could your organisation save?
Leave us your details: a RaYSun expert will get back to you within 48 hours for a free, no-obligation assessment.