Per Eigen Huis, the Investment Subsidy for Sustainable Energy (ISDE) continues to reimburse a portion of the purchase and installation costs for measures such as cavity wall insulation, floor insulation, roof insulation, heat pumps, solar boilers and connecting to a heat network. The scheme is aimed at existing homes and buildings, not new-build projects.

According to Engie, the solar boiler remains one of the measures eligible for ISDE support in 2026, which keeps a solar thermal route open for households that want to cut gas use for hot water. Standalone solar PV, by contrast, is not part of the ISDE measure list.

Why solar alone no longer qualifies

The removal of standalone PV from the ISDE reflects a policy shift: the Netherlands is moving away from subsidising electricity generation that is already driven by the net-metering debate and falling panel prices. Per Gaslicht.com, homeowners looking for solar panel subsidies in 2026 will not find them in the ISDE; the scheme is reserved for measures that reduce heat demand or replace fossil heating.

For housing corporations, the picture is more complicated. According to Solar Magazine, housing associations have warned they may stop installing solar panels on rental rooftops because the end of the net-metering scheme undermines the business case for EPV projects.

What homeowners and building owners can still claim

• Insulation: cavity wall, floor, roof and glazing measures remain eligible under ISDE, per Eigen Huis.
• Heat pumps: air-source, ground-source and hybrid heat pumps are covered, with amounts depending on the model and installation.
• Solar boilers: still supported in 2026, according to Engie.
• Heat network connections: included for existing buildings.
• Standalone solar PV: not eligible under ISDE, per Gaslicht.com.

What this means for VvE and C&I owners

For homeowners’ associations (VvE), the ISDE still offers a route to fund insulation and heat pumps on shared building elements. Per Eigen Huis, VvE boards can apply for ISDE support for measures on the building shell and shared installations, provided the building meets the scheme’s existing-building criteria.

For C&I project owners, the message is similar: the subsidy is now a decarbonisation tool for heat and the building envelope, not a solar support scheme. Solar remains attractive on its own economics, but it no longer rides on ISDE.

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