What the Solar + AD Plant Bundle delivers
Larger UK farms operating anaerobic digestion (AD) plants alongside livestock or arable production can pair rooftop solar PV on the AD plant buildings with the AD's biogas generation. The two technologies are complementary — AD handles primary energy production from biological feedstock; solar handles auxiliary electrical loads at near-zero marginal cost.
Standard Solar + AD Plant Bundle scope
Standard solar+AD bundle: rooftop PV on AD plant buildings (CHP house, digestate handling, control building); typical 100-300 kW PV install; integration with AD plant electrical infrastructure; combined monitoring of biogas and solar generation.
Economics in 2026 prices
For a typical retrofit on existing AD plant: 200 kW rooftop PV. Capex £160,000. 100% AIA delivers ~£40,000 year-one tax saving. Annual savings: replaces grid import for AD auxiliary loads (mixers, pumps, control systems) at £35,000+. Simple payback 3.5-4.5 years — among the fastest solar paybacks we deliver because AD auxiliaries provide near-continuous high-quality daytime baseload.
Why we deliver as a single project
The Solar + AD Plant Bundle works because all components are designed, procured, and installed as one coordinated project. Single G99 grid connection application. Single monitoring portal. Single set of warranties. Single contractual relationship. Compared to running multiple separate projects, the bundled approach saves £20,000-£60,000 in mobilisation overhead alone.
Get a bundle proposal
Send us your half-hourly meter data and a brief on your operational goals (fleet electrification plans, supplier audit requirements, capital position, planned building work). We deliver a free desk feasibility study within 10 working days, including bundle scope recommendation, total capex with all elements, 25-year financial model, and indicative project timeline.
Common questions
What's the total capex for a typical Solar + AD Plant Bundle?
Varies by farm scale. AD plant: 200 kW rooftop PV. . We deliver fixed-price proposals within 7 working days of receiving meter data.
Can the Solar + AD Plant Bundle be financed?
Yes — asset finance over 5-10 years for the entire bundle is typically EBITDA-positive from month one for installs with strong daytime baseload. PPA available for systems above 250 kW. Capital purchase with 100% AIA for incorporated farms.
How long does the bundle take from contract to commissioning?
Most bundles complete in 6-9 months from contract signature. The longest item is typically DNO G99 grid connection (6-14 months on most rural feeders, running in parallel). Physical install on-site is typically 4-8 weeks.
Is the bundle eligible for AIA tax relief?
Plant and machinery components (panels, inverters, batteries, EV chargers, heat pump units) are 100% AIA eligible up to the £1m annual cap. Building fabric (re-roofing, structural reinforcement) typically isn't but may have other tax treatment. We provide itemised invoices supporting clean accountant claim.