Choosing the right commercial solar installer is the single highest-impact decision in a farm solar project. The wrong installer can leave you with a system that underperforms by 20%, a warranty you can't claim against, or a roof leak that takes years to resolve. Here's the 2026 checklist for picking a UK farm solar installer.
Non-negotiable accreditations
**MCS Commercial Certification.** The Microgeneration Certification Scheme is the UK gold standard for solar PV installers. MCS Commercial covers installations above 50 kW. Verify the installer's certification at mcscertified.com — the database is public and searchable. Avoid any installer without current MCS Commercial certification; without it, your SEG application will be rejected.
**NICEIC Approved Contractor.** NICEIC certifies electrical contractors to BS 7671. Required for any commercial electrical work in the UK. Verify at niceic.com.
**RECC Membership.** The Renewable Energy Consumer Code applies to renewable energy installations. Provides consumer protection guarantees. Verify at recc.org.uk.
**TrustMark Licence.** Government-endorsed quality scheme for tradespeople. Verify at trustmark.org.uk.
**IWA Insurance-Backed Warranty Provider.** IWA provides 10-year insurance-backed workmanship warranty cover. Without IWA registration, your workmanship warranty isn't insured against installer insolvency — meaning if the installer goes out of business, your warranty is worthless. Critical accreditation for long-term protection.
For most UK farm installs, all five of these accreditations should be in place before signature. If any is missing, ask why.
Sector-specific experience
Generalist commercial solar installers (who do offices, warehouses, retail) typically struggle with farm-specific challenges: asbestos cement roofs, biosecurity protocols for poultry and pig units, tenant-farmer landlord engagement, calving/lambing/harvest scheduling, NFU and TFA awareness. Ask for: number of farm installations completed in the past 3 years; references from working farms specifically (not just general commercial); experience with combined re-roof + PV projects; experience with the building type you're considering (a dairy parlour installer might be unfamiliar with poultry biosecurity, or vice versa).
Insurance and bonding
Verify: public liability cover (£10m minimum for commercial installs); employers' liability cover; professional indemnity cover (£5m+ for design and feasibility scope); products liability cover. Ask for current certificates with insurer name and policy number.
Warranty terms
Understand the full warranty stack:
- **Panel manufacturer warranty** (12–25 years on product, 25–30 years on performance). Provided by the panel manufacturer (JA Solar, LONGi, etc.), independent of installer.
- **Inverter manufacturer warranty** (10 years standard, extendable to 20). Provided by the inverter manufacturer.
- **Installer workmanship warranty** (10 years for most reputable installers). Covers the installer's work — connections, fixings, cabling, racking installation.
- **Insurance-backed workmanship** (IWA-backed for 10 years). The critical layer — pays out if installer goes out of business during the workmanship warranty period.
Make sure all four layers are documented and provided at handover.
Project delivery process
A proper farm solar installer should provide:
1. **Free desk-based feasibility study** (no obligation, no fees) — within 7 working days of receiving your meter data
2. **On-site survey** — structural, electrical, access; typically 1 day per site
3. **Fixed-price proposal** — including detailed PVSyst yield modelling, DCF financial model, scope of works, payment schedule, programme
4. **Planning consultation** if required — handled by the installer, not pushed back to you
5. **G99 grid connection submission** — typically immediately after structural survey to compress timeline
6. **Asbestos sample testing** if applicable — UKAS-accredited lab, results in 5–10 working days
7. **Installation programme** — with clear milestones, key dates, and farm-calendar scheduling
8. **Commissioning, MCS certification, monitoring portal handover, warranty documentation**
Avoid any installer who quotes without an on-site survey, charges for desk feasibility, or doesn't provide a fixed-price proposal.
References and case studies
Ask for at least three references from farm installations in the past 24 months. Call them. Specific questions: did the install complete on time? Did the install complete on budget? Were there any major changes or surprises during construction? How is the system performing against the original yield model? Has the installer responded promptly to any post-install issues? Would you use them again?
Financial stability
The installer must be financially stable enough to honour 10-year workmanship warranty obligations. Check: Companies House for the installer's accounts (search at companieshouse.gov.uk); trading history (more than 5 years is reassuring; less than 2 years is concerning for warranty protection); any registered insolvencies or CCJs; ownership structure.
IWA-backed warranty cover mitigates installer insolvency risk during the warranty period — but installer financial stability still matters for ongoing support, monitoring, fault response, and project relationship.
Sector-specific considerations for farms
**Asbestos cement handling.** If your building has AC cladding, the installer must coordinate with an HSE-licensed asbestos contractor. Verify the installer's process: do they have a preferred partner? Can they coordinate the full combined project? Do they handle Asbestos Removal Notification to HSE? Is the asbestos and PV scope under a single fixed-price contract?
**Biosecurity protocols.** For poultry and pig installations, confirm: boot dips, vehicle decontamination, restricted access lanes, AHDB or Red Tractor scheme awareness. The installer should walk through these protocols before contract signature.
**Tenant-farmer landlord engagement.** If you're a tenant, confirm: does the installer provide lease addendum templates? Will they engage with the landlord agent directly? Have they worked with your specific landlord before (Crown Estate, Church Commissioners, NFU Mutual Estates, etc.)?
**Farm-calendar awareness.** Confirm: will the installer schedule physical works around calving, lambing, harvest, and shearing? Do they understand which weeks of the year are off-limits for your operation?
Red flags
Walk away from any installer who:
- Cannot show current MCS Commercial certification
- Provides a quote without an on-site survey
- Pushes a specific manufacturer with no comparison
- Doesn't carry IWA-backed workmanship warranty
- Quotes without itemised line-by-line scope
- Pressures fast decision-making (legitimate quotes are typically valid 30+ days)
- Cannot provide three checkable farm references from the past 24 months
- Has poor or no online reviews (Google Business Profile, Trustpilot)
- Has been trading less than 2 years (warranty risk)
- Cannot answer detailed technical questions about your specific building type
What we do differently
We focus exclusively on UK farm-building solar — dairy parlours, livestock sheds, grain stores, poultry, pig, polytunnels, equestrian, farm workshops. We don't install on offices, warehouses, or schools. Every project includes desk feasibility within 7 days, fixed-price proposal, full warranty stack, and 10-year IWA workmanship cover. If your site doesn't suit solar, we'll tell you honestly rather than push a marginal project.
Ready to talk? Send us your half-hourly meter data and building dimensions via the [quote form](/quote/) and we'll deliver feasibility within 7 working days.