Today, your clients' surplus is sold back to the supplier at around 35 €/MWh. In a RaYSun energy community, it is sold to neighbouring businesses at 60 to 95 €/MWh. Your offer is more profitable, your client is paid back sooner, and RaYSun handles all the administration.
On a company roof, a good share of the production goes to the grid: at weekends, at midday, in summer. That surplus is bought back by the supplier at market price, at the very moment everyone is producing. In 2025, an injected solar kWh in Belgium was worth on average 32 to 42 €/MWh on the market, before supplier fees.
That price stretches the payback period and pushes installers to undersize systems. In an energy community, the same kWh is sold to a nearby business, which pays less than with its supplier. Both sides win.
The energy community gives you two ways in with the same client.
You sell the installation with the energy community built into the offer.
They join the community to buy cheaper local electricity, without investing anything.
An order of magnitude in 30 seconds. The RaYSun study redoes the calculation on the site's 35,040 real quarter-hours.
Assumptions: 900 kWh/kWp/year; self-consumption valued at 180 €/MWh; surplus sold back to the supplier at 35 €/MWh; maintenance 1.5% of the investment per year; RaYSun management fees of 5 to 8 €/MWh shared deducted. Simple payback, without inflation or panel degradation.
Volumes actually measured and invoiced by RaYSun, not simulations.
The developer produces on the park and sells its surplus to neighbouring businesses at 95 €/MWh instead of 35.
RaYSun financial plan for the project, recalculated with the volumes actually shared from April to August 2026 (42% of injection).
Warehouses that consume little and produce a lot: the typical case where surplus weighs most.
637 MWh shared out of 937 MWh injected, October 2025 to September 2026.
It placed 6 of its clients' roofs in the community: its offer earns more, with no administrative work on its side.
Volumes invoiced over 10 months, 2025-2026.
Including a catering site and a chemicals SME: they buy the shared energy of neighbouring producers.
April to September 2026. This is the "consumer" way in for your prospects.
A roof, a client, a bill and a smart meter. That is all we need.
RaYSun simulates the sharing quarter-hour by quarter-hour and gives you the figures for your offer.
Contracts, grid operator file, entry into the community: about 1 month in Brussels, 3 months in Wallonia.
Readings, allocation, invoicing and payment to the producer. Your client receives their revenue without lifting a finger.
No. They keep their supplier for the remainder. Only the share supplied through the community is invoiced by RaYSun.
Those that inject a lot: warehouses, sheds, buildings closed at weekends, roofs larger than the client's needs. The larger the injected share, the shorter the payback period.
Allow about 1 month in Brussels and about 3 months in Wallonia and Flanders, the time needed for the grid operator's procedures.
They choose their term: no commitment, 1, 3, 5 or 10 years. The longer the contract, the better their surplus is valued (60 to 70 €/MWh in Energilia). If they leave before the end, they are simply paid at the rate of the term completed.
A smart meter and a recent electricity bill. RaYSun handles the simulation, the contracts, the grid operator file and the monthly invoicing.
Yes. RaYSun operates communities in all three Regions, with the open sharing operations Energilia Brussels and Energilia Wallonie, and dedicated communities for business parks and multi-site companies.
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