Professional UK Solar Contract Templates

Solar Contracts Built Around The Work You Actually Do.

Solar work isn't one-size-fits-all — and your contracts shouldn't be either.

Construction Companion provides professional UK solar contract templates built around the different projects, clients and responsibilities solar installers deal with. From working directly with homeowners to B2B and commercial clients, our agreements are developed around the realities of running a professional solar and renewable energy business.

Our wider solar contract range covers domestic solar PV installations, commercial solar projects, retrofit work, off-grid systems, roof replacement with solar, battery and renewable energy projects, heat pump integration, solar servicing and maintenance, agricultural solar and EV charging. The aim is simple: give installers professional paperwork that reflects the type of work actually being carried out.

Domestic Solar Commercial Solar B2B Projects Retrofit Solar Off-Grid Systems Roof + Solar Battery Storage Heat Pumps Solar Maintenance Agricultural Solar EV Charging

The agreement on this page can be purchased individually, downloaded instantly, filled in with your business and project details and used again whenever you need it.

No Subscription. No Membership. Just Professional Solar Contracts.
The Industry Standard For Solar Installers

More Than Paperwork. Part Of How A Professional Solar Business Operates.

A professional contract collection is not something that sits unused in a folder. It becomes part of how you run your business — helping set clear expectations, define responsibilities and put stronger terms in place before problems arise.

Scope Changes Payment Terms Variations Delays Snagging Additional Work Responsibilities Specialist Installations

Chosen by solar installers across the UK. Built from real industry experience and refined with legal knowledge — giving your business professional terms ready for the projects you actually take on.

See Exactly What's Included ↓
Built By The Trade. For The Trade.
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Heat Pump Integration Agreement

Heat Pump Integration Agreement

Real trade insight , backed by UK legal expertise.

£19.99
£19.99
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📩 Download your documents instantly after purchase
Built From Real Solar Experience

Solar Experience + Legal Knowledge

Developed from real solar installer experience and refined with legal knowledge, combining practical understanding of solar projects with clear, professional contract terms.

Protect Your Business

Avoid Disputes. Protect Payment.

Clear terms help set out scope, responsibilities, payment, variations and additional work before misunderstandings become expensive problems or delay what you are owed.

Clear From The Start

A Clear Point Of Reference

Give customers and business clients somewhere to refer back to for agreed responsibilities, project stages, expectations and what happens next. It helps answer common questions, cuts down repeated explanations and reduces the known disputes and misunderstandings that regularly arise in the solar industry.

Included With Your Purchase

Business Terms & Conditions Included

✓
Quotation Terms & Conditions

Professional terms to send alongside your quotation so expectations, responsibilities and payment terms are clear from the start.

✓
Invoice Terms & Conditions

Send them with your invoice as a gentle reminder of the payment terms and conditions already agreed before the work began.

No extra charge. Included with your solar contract.

Heat Pump Integration Agreement

For Combined Solar + Heat Pump Installations & Retrofits

This professional, easy-to-edit contract template is designed for trades working on integrated systems — where solar installations are combined with heat pumps, smart energy controls, or system upgrades.

Whether it’s a new project or a retrofit to existing solar or heating equipment, this agreement sets out clear boundaries, defines compatibility expectations, and protects your business when working across multiple technologies and standards.

Written by experienced installers and reviewed for legal clarity, it helps ensure you're covered when system limitations, usage patterns, or site-specific risks affect the final result.

What This Contract Helps With:

✔️ Covers Both New Installs and Retrofits
Whether you're adding a heat pump to an existing solar system or integrating everything from scratch, this agreement includes clauses to define each scope clearly.

✔️ Manages Compatibility Expectations
Outlines the limitations when pairing different brands, inverter logic, communication protocols, or heating control systems — so performance mismatches don’t come back to you.

✔️ Clarifies Performance vs. Seasonal Conditions
Advises the client that solar-only heating may not meet full demand year-round, especially in colder months — helping prevent overpromising and underdelivering.

✔️ Protects Against Warranty Confusion
Separates warranty coverage between solar and heat pump systems, making it clear which system you're responsible for — and avoiding cross-claim issues down the line.

✔️ Covers Smart Monitoring & Load Flow Setup
Includes terms for systems using CT clamps, portals, or other monitoring setups — with clear boundaries for internet access, client-side hardware, and usage tracking.

✔️ Outlines Client Obligations for Disclosure & Access
Clients must confirm existing systems, boiler types, thermostats, and site access in advance — to avoid failed integrations or delays.

✔️ Includes Site Prep and Risk Clauses
Protects you when working with pad foundations, frost-prone areas, drain-down requirements, and other key heat pump site conditions.

Example Terms & Conditions Highlights

Built from Trade Experience

✔️ Scope options for full installs vs. solar/heat pump retrofits
✔️ Load balancing + comms protocol compatibility
✔️ No liability for seasonal energy shortfall
✔️ Part L, Part P, and MCS compliance references
✔️ Separate warranty terms by system
✔️ Clauses for external location prep and cold-weather planning
✔️ Internet and data sharing responsibilities for smart monitoring setups

…and more clauses written to reduce risk and clearly define expectations on multi-technology installations.

When to Use This Template:

Any time you’re integrating a heat pump with a solar PV system — whether retrofitting to an existing setup or delivering a new combined install.

Why Use It?

This isn’t a generic contract.
It’s designed for real-world integration work — where you're dealing with multi-system setups, mixed warranties, and client expectations that need to be carefully managed.

✅ Instant download
✅ Easy to edit
✅ One-time payment of £25.99 — includes unlimited use and free updates for 18 months

This agreement follows the same trusted standard as all Construction Companion templates — clear, informative terms that are easy to read, with firm but fair conditions around payment, responsibilities, and protection.
It maintains a strong balance between being approachable for clients and professional enough to protect your business.

View full details
Four Of Our Most Popular Solar Agreements

Be Ready For More Than One Type Of Solar Job.

If your business takes on different types of work, the complete Solar Contract Collection gives you specialist agreements ready for the projects that come through the door.

01 Domestic Solar Installation For homeowner supply and installation projects.
02 Commercial & B2B Solar For builders, landlords, contractors and commercial clients.
03 Off-Grid Solar For battery autonomy, generators and off-grid responsibilities.
04 Retrofit Solar For upgrades and work involving existing systems.
Solar Business Contract Template Bundle
And That Is Only The Start

Get The Whole Solar Contract Library.

The complete collection includes 13 specialist solar documents covering domestic, commercial, B2B, off-grid, retrofit, roof replacement with solar, heat pump integration, maintenance, agricultural solar, EV charging and more.

Keep the full solar contract library ready in your business so when a different type of project comes through the door, the agreement is already there when you need it.

Limited Time Bundle Offer
£49.99 £19.99
All 13 Documents Included
Get The Complete Solar Contract Collection
Instant Download · No Subscription · No Membership
Trusted By Solar Installers Across The UK

Professional Solar Contract Templates. Built For Real Solar Work.

Construction Companion specialises in professional UK solar contract templates for solar installers, renewable energy businesses and contractors. Our agreements are developed from real solar and construction industry experience and refined with legal knowledge, combining practical trade terms with clear, professional contract wording.

Different Projects. Different Responsibilities.

Built Around The Solar Work Installers Actually Carry Out.

Solar work can mean dealing directly with a homeowner one week and working for a builder, landlord, contractor or commercial client the next. The responsibilities, expectations and potential problems are not always the same.

Our wider solar experience covers domestic solar PV, B2B and commercial projects, retrofit installations, off-grid systems, battery storage, roof replacement with solar, heat pump integration, maintenance, agricultural solar and EV charging.

That experience helps shape agreements around the situations installers regularly deal with — including scope, payment, variations, customer responsibilities, existing systems, delays and additional work.

Domestic Solar B2B Solar Commercial Solar Off-Grid Solar Retrofit Battery Storage Roof + Solar Heat Pumps Maintenance Agricultural Solar EV Charging
Simple By Design

A Price Is A Price. No Hidden Costs.

The price shown above is the price you pay. There is no membership to join and no monthly subscription waiting afterwards. Purchase the agreement, download it, fill in your business and project details and it is ready to use.

  • ✓ No subscription
  • ✓ No membership required
  • ✓ No hidden fees or unexpected costs
  • ✓ Instant download after purchase
  • ✓ Simply fill in your business, customer and project details
  • ✓ Keep it ready and use it again and again on future projects
01 Download
02 Fill In The Details
03 Ready To Use

Professional solar paperwork without complicated platforms, memberships or ongoing fees. Download it. Fill in the details. Put it to work.

Why Solar Installers Choose Us

Built With People Who Understand The Job.

A solar contract should reflect more than legal wording. It should understand how solar projects are actually delivered, where problems arise and what needs to be clear before work begins.

Industry Knowledge Behind The Documents

Real Solar Experience.
Not Just Template Writing.

Built from real solar installer experience, covering domestic and commercial PV, retrofit work, roof replacement with solar, batteries and off-grid projects.

Our knowledge also reflects the day-to-day realities of DNO processes, G98, G99, MCS project delivery and handover, existing systems and coordinating different parts of an installation.

Alongside our installers, contracts managers bring practical experience of variations, payment stages, responsibilities and project expectations.

Level 3 Solar PV 18th Edition Inspection & Testing Battery Storage DNO · G98 · G99 SMSTS / SSSTS
A Key Part Of Our Experience Practical experience delivering solar projects through MCS requirements, project delivery and customer handover.
Built By The Trade. For The Trade.
The Difference

More Than A Generic Contract With “Solar” Added.

What Matters
Construction Companion
Typical Generic Template
Built around real solar projects
✓ Solar-specific
— Often generic
Installer experience behind the wording
✓ Yes
— Not always
Contracts management knowledge
✓ Built in
— Varies
MCS project delivery understanding
✓ Real experience
— Not guaranteed
Plain English and straightforward to use
✓ Fill in the details
— Can be legal-heavy
Membership or subscription required
✓ No
— Often possible
Ready immediately after purchase
✓ Instant download
— Varies
Reuse on future projects
✓ Use again & again
— Depends on provider
✓
A Price Is A Price. No Hidden Costs. No subscription. No membership. No complicated platform. Purchase your agreement, download it and put it to use.
Solar Contract FAQs

Straight Answers. No Legal Jargon.

Common questions from solar installers and renewable energy businesses using professional contract templates across the UK.

How do I complete and use the solar contract template?

The template is designed to be straightforward to complete. Simply add your business details, customer or client information, project details, agreed price, payment arrangements and any relevant project-specific information.

Once completed, you have a professional agreement you can issue to your customer or business client before work begins.

Can I reuse the contract on future solar projects?

Yes. The agreement is intended to become part of the way you run your business, rather than something you purchase for one job and forget about.

Keep a master copy and complete it again for future projects, changing the customer, project, scope, price and relevant details for each new job.

Is it suitable for UK solar installation work?

Our solar agreements are developed around the realities of UK solar installation and renewable energy work, with input from experienced solar PV installers and contracts management knowledge.

That experience includes domestic and commercial PV, retrofit installations, roof replacement with solar, battery storage, off-grid work and the practical processes surrounding MCS project delivery, DNO requirements, G98 and G99.

What regulations and requirements should solar installers consider?

Depending on the project, UK solar installation work may involve requirements connected with MCS, Building Regulations, electrical standards, DNO applications, G98, G99, planning, consumer protection and project handover.

Your contract helps set out the commercial relationship between you and the customer or client, including responsibilities, payment, scope and expectations.

Important: a contract does not replace the technical, regulatory or certification requirements that apply to an individual solar installation. Installers remain responsible for complying with the requirements applicable to their work.
Why use a specialist solar contract instead of a generic agreement?

Solar projects create situations that a generic business agreement may not properly reflect.

These can include existing systems, additional work, variations, customer responsibilities, access, payment stages, delays, grid connection processes, handover and different installation types.

A specialist solar agreement gives both sides a clearer point of reference and helps reduce the misunderstandings and disputes that are already well known within the solar industry.

Do I need different contracts for different types of solar work?

Different projects can involve very different responsibilities. A domestic homeowner installation is not the same as a commercial project, retrofit, off-grid system, roof replacement with solar, maintenance agreement or EV charging installation.

If your business carries out several types of solar work, our complete Solar Contract Collection includes 13 specialist documents so you can keep the appropriate agreement ready for the different jobs that come through the door.

Built By The Trade. For The Trade.
Trusted By Solar Businesses Across The UK

Built For The Work. Rated By The Trade.

From DNO approvals and G98 responsibilities to retrofit systems, payment expectations and customer questions, solar installers value contracts that understand the work as well as the paperwork.

4.9 / 5 Rated UK Trade Reviews Solar Installer Feedback Built From Industry Experience
Easy To Use Solar Installer
★★★★★

“Really happy with it. I was expecting something quite legal and intimidating but it wasn't like that at all. Filled our company details in, changed a couple of bits to suit how we work and it was ready. Looks miles better than what we were sending customers before.”

CM
Chris M CM Solar Solutions
DNO & Customer Questions Renewables
★★★★★

“The biggest thing for us is it answers a lot of the questions customers normally ring about after the quote. DNO, export, meter changes, access and what happens if something holds the install up. Saves going over the same stuff on every job.”

AP
Andy Palmer AP Renewables
Retrofit Solar Solar + Battery
★★★★★

“Bought it mainly for the retrofit agreement because we're doing more battery additions and upgrading older PV systems now. Good wording around existing equipment because that's always the grey area when you're working on someone else's original install.”

LH
Lee H South Coast Solar & Battery
Complete Bundle Domestic PV
★★★★★

“For twenty quid I wasn't expecting everything that's in it. We do domestic PV mostly but we've already used the commercial one and the roof and solar agreement. Handy having the others there because you never know what the next enquiry is.”

MR
Matt R MR Solar Installations
Off-Grid Systems Battery Storage
★★★★★

“The off-grid contract is what sold it to me. Customers don't always understand that battery capacity and generation aren't an unlimited supply. It puts the expectations down properly before we install which is much better than trying to explain it after.”

RE
Rob Ellis RE Solar & Storage
Professional Paperwork Solar Electrical
★★★★★

“Simple enough to fill out but still looks like proper paperwork. Customers are spending a lot of money on these systems so I don't want to hand them some basic two-page thing I've knocked together myself. Very happy with it.”

DW
Dan Wilson Wilson Solar & Electrical
G98 & Grid Connection Solar PV
★★★★★

“Good proper terms for DNO approvals, warranties and system layout. The section on G98 is clear and saves me having to explain it every time. Customers sign knowing exactly what they're getting, who's responsible for what and the timeframes involved.”

LW
Lorenzo W Essex Solar And Roofing
Commercial Solar B2B Projects
★★★★★

“We mainly work B2B and needed something that looked right going out to commercial clients. The variation and additional works terms are useful because scope always seems to move once you're actually on site. Good solid agreement.”

CB
Carl Bennett Bennett Commercial Solar
Roof + Solar Roofing & PV
★★★★★

“We're roofers as well as solar installers so the roof replacement agreement was the one I wanted. Much better having the roofing work and solar installation set out together rather than sending the customer two completely different sets of paperwork.”

GT
Gary T GT Roofing & Solar
The Same Themes Keep Coming Up

Easy To Use. Professional To Hand Over. Written For Real Solar Work.

Clear enough for customers to understand, detailed enough for a professional solar business and built around the questions and problems that repeatedly appear during real installations.

Easy To Fill In DNO & G98 Terms Customer Responsibilities Payment Terms Retrofit & Existing Systems Domestic & Commercial Solar Off-Grid & Battery Projects No Legal Jargon
How Our Solar Contracts Are Built

Real Solar Experience. Turned Into Stronger Terms.

Our solar contract templates start with the situations installers and renewable energy businesses actually face — then that experience is developed into clear, professional contract terms.

01
Experience From The Solar Trade
It Starts With The Work

Real Solar Industry Experience.

The starting point is not a blank legal document. It is knowledge of domestic solar installations, commercial projects, off-grid systems, retrofit work, roof and solar projects, battery systems and specialist renewable installations.

02
Problems Seen In The Real World
We Know Where Problems Start

Common Solar Disputes Are Considered Early.

Scope changes, additional work, existing equipment, roof responsibilities, delays, access, customer expectations, payment issues and snagging can all become disputes. Those recurring problems help shape the contract before the project begins.

03
Practical Experience Becomes Terms
Experience Put Into Writing

The Risks Become Clear Contract Terms.

The practical issues installers face are developed into clear scope, responsibilities, variation procedures, payment arrangements, customer obligations and project-specific terms. The aim is simple: fewer assumptions and more clarity from the start.

04
Refined With Legal Knowledge
The Final Stage

Industry Knowledge. Professionally Refined.

The real-world solar knowledge behind the agreement is then refined with legal expertise, helping turn practical experience into professional solar contract templates that are clear, structured and straightforward to use in your business.

Built By The Trade. For The Trade.

The Trusted Name In Contract Templates For UK Tradespeople

We understand the challenges you face. Our documents are built with integrity and deliver real value, crafted by trades for trades with professionalism and real-world experience at their core.

Built From Experience

Decades of experience are built into every document we create.

From the dream customer who pays on time and lets you get on with the job, to the ones we all dread , the ones who expect free extras that weren’t in the quote, ignore invoices, or think your price should depend on how long you’re on-site.

All our documents have you covered.

" Written by trades, for trades, with real-world challenges in mind "

A Smart Investment Without the Wait

When you choose this investment for your business, we don’t keep you waiting. Whether it’s for a job today or tomorrow, all documents are available instantly, easy to customize, and ready to use. Just fill in the blanks.

" Less Time at the Laptop, More Time Doing What Matters "

On Time Payments

"One of the most important aspects of an agreement is ensuring you get paid on time."

Our documents do exactly that. Spend less time chasing invoices or awkwardly sending payment reminders, and more time focusing on your trade.

With clear terms, you decide when you get paid, whether it’s upon completion, within 7 days, or 30 days later.

Our agreements are fully customisable to suit your business.

"An agreement with solid terms puts a stop to invoice ignorance."

Confidence in Every Agreement

Your customers deserve more than a cheap, generic template that has no relevance to your trade.

You wouldn’t give your customers unreliable materials, so don’t give them a low-quality agreement.

Join the countless trades across the country who look professional with documentation that reflects the quality of their work and their approach to business management.

" provide your customers with a professional agreement they’ll respect "

Ready When You Are

Still Need The Heat Pump Integration Agreement?

Your workmanship looks professional. Your paperwork should too.

Give your customers or business clients something you are proud to put your company name on and confident to hand over. Clear, professional paperwork reflects the same standards you bring to the job itself.

Got a job ready to go today, tomorrow or next week? You do not need to start writing terms from scratch. Download the document, fill in the blanks with your business, client and project details and it is ready to use.

✓ Instant Download
✓ Fill In The Blanks
✓ No Subscription
✓ Use Again & Again
One Simple Price
£19.99
✓
Two Years Of Downloads & Updates Included

You will have unlimited downloads for two years. If we update your document during that period, you can download the latest version at no extra charge.

Built By The Trade. For The Trade.