Where the engineering genuinely runs out
Qualifying work is where the field’s capability, not the company’s, has to be pushed. Novel cell chemistry, solid-state, sodium-ion, silicon or lithium-metal anodes, where degradation or thermal-runaway behaviour cannot be predicted, and pack-level engineering resolving energy density against safety, cycle life and fast-charge. Power electronics using wide-bandgap devices to resolve switching-loss, thermal and efficiency uncertainty under conflicting constraints. Grid and system integration where high renewable penetration creates genuine system-level uncertainty in stability, protection or control that a competent professional cannot readily resolve. Hydrogen electrolyser and storage development, carbon-capture solvents and processes that improve on what current techniques achieve, high-temperature heat-pump cycles and next-generation renewables. In every case the advance is in the technology, not in the fact that a clean outcome was reached.
The work that feels like R&D but is not
Most activity in the sector is deployment, and outside the definition. Routine installation and commissioning of standard solar, heat pumps, wind turbines or chargers to manufacturer specifications. Engineering and design to established codes and standards, including standard grid-connection compliance. Feasibility, site, planning and environmental studies. Buying and configuring off-the-shelf control systems. Commercial optimisation, better yield, cost or return with no technological advance. And confirmatory testing, certification and type approval.
Deployment versus development, and the grant question
Two lines decide most energy claims. The first is deployment against development: known technology at a new scale or site only qualifies where the scale or integration itself creates real technological uncertainty, not because the project was large, green or hard for the company. The second is grants. For accounting periods beginning on or after 1 April 2024, the merged scheme dropped the old restriction that reduced grant-funded R&D, so decarbonisation and innovation grants no longer cut the claim. For earlier periods still within the amendment window, the old rules apply and grant funding changes the treatment, so getting the period right is the first thing we check.
Sector pitfalls we would check first
- Deployment dressed as development. “We built a large clean-energy project” is not a claim. The advance has to sit in the technology, evidenced, not in the scale or the sustainability of the outcome.
- The grant period. The subsidised-expenditure change turns on when the accounting period begins. We confirm the period before scoping, because it moves the answer.
- Contracted-out engineering. Where you deliver R&D as contractor for a funder, utility or OEM, the merged scheme decides whether you or your customer claims. Do not assume it is yours, and do not both claim.
- The overseas restriction. For periods from 1 April 2024, overseas subcontractor and worker costs are excluded unless the conditions genuinely cannot be replicated in the UK. Genuine offshore or marine testing may qualify; offshoring for cost does not.
- The sold prototype. Where a demonstrator is commissioned and sold, its materials fall outside even though the design and testing can qualify. The rule is on qualifying costs.
Frequently asked questions
We install renewable technology. Does that qualify?
Installing standard solar, wind, heat-pump or EV-charging technology to manufacturer specifications is not R&D, however large or demanding the deployment. R&D is developing or advancing the technology, not rolling out what already exists. Deployment qualifies only where the integration itself creates genuine technological uncertainty.
We received an Innovate UK grant. Can we still claim?
Yes. For accounting periods beginning on or after 1 April 2024, the old restriction that reduced grant-funded R&D no longer applies under the merged scheme, so a grant no longer cuts your claim. For earlier periods still in the amendment window, the old rules apply and the treatment differs, so the period matters.
Does achieving a company first count?
No. Achieving something new for your business is not the same as advancing the field. The technological uncertainty has to be one a competent professional in the field could not readily resolve, not merely one your team had not met before.
We build a demonstrator that gets sold or commissioned. Do the materials qualify?
Usually not the materials. Where a prototype or first unit is commissioned into a live, revenue-generating asset and sold, the materials and construction fall outside; the design, modelling and testing that resolved the uncertainty can still qualify.