Investeringssubsidie duurzame energie en energiebesparing (ISDE)
Investment subsidy for business premises using eligible sustainable energy devices.
ISDE is an investment subsidy for smaller-scale assets. For business users the scheme covers heat pumps, solar boilers and small-scale wind turbines. The key is to check the RVO application sequence and technical device eligibility before purchase.
2026 budget
EUR 500 million for homeowners and business users, plus EUR 5 million extra for small-scale wind turbines for business users (RVO, page checked 22 August 2026)
Business measures
Heat pumps, solar boilers and small-scale wind turbines
Scheme duration
New budget each year; the scheme runs until 2031 according to RVO
Application
Conditions and the application sequence differ per measure; consult the RVO page for business users
Reference date: Checked 2 September 2026 against RVO; RVO page content dated 22 August 2026. Always verify the current rules, budget status and deadlines with RVO before submitting an application or making investment commitments.
Where the opportunity is
- Heat pumps for business premises where grid and heat profile allow it.
- Solar boilers and small-scale wind turbines.
- Projects where ISDE improves a broader heat transition business case.
- Combination with energy strategy and capacity assessment.
Key conditions to check
- The device must be installed in the Netherlands.
- The device must meet RVO technical requirements and appear on the relevant list.
- Follow the RVO application sequence for business users before ordering.
- The subsidy amount depends on the type and performance of the device.
Do not let the subsidy choose the technology.
COMCAM can test whether an ISDE-eligible technology makes sense for the site: heat demand, electricity capacity, contract structure and operational profile matter.
Common pitfalls
- Ordering before checking the application sequence with RVO.
- Selecting a device because it is subsidised without checking grid capacity.
- Ignoring interaction with gas consumption, heat profile and future electrification.
Practical next steps
- Check device eligibility and technical list.
- Assess heat profile and electricity connection impact.
- Check the RVO application sequence before purchase.
- Connect the measure to the wider energy transition route.
Want to test whether ISDE fits your project?
COMCAM reviews your energy data, investment plan, timing, subsidy fit and operational constraints before you commit to a solution.