System selection and specification
Sizing, equipment selection, layouts, electrical diagrams, protection settings and integration advice can be professional services when the contractor provides or accepts responsibility for them.
Solar Design & Construct Insurance
Understand the line between installation work, professional services, adopted designs and contractual responsibility before seeking D&C terms.
PI
Professional advice
PL
Work on site
D&C
Design responsibility
Recognition
THE SHORT ANSWER
When should a solar contractor consider design and construct insurance?
D&C cover may be relevant where a solar contractor performs or accepts responsibility for design, specifications, system selection, documentation, coordination or an adopted consultant design alongside construction work. It does not replace public liability for covered injury or property-damage allegations.
The appropriate structure depends on the signed contracts, actual scope, design responsibility, insurer acceptance and the policy's insuring clauses, limits, exclusions and notifications requirements.
- Ask
- Who owns design risk?
- Separate
- PI from public liability
- Declare
- Adopted designs
- Review
- Contract promises
A solar contractor that only installs to a settled third-party design may present differently from one that selects equipment, changes layouts, adopts a consultant's design or accepts responsibility for the finished design. Read this alongside our solar PI guide and the broader Design and Construct insurance guide.
Adopted consultant design
Engaging an engineer or designer does not automatically remove the contractor's exposure. Explain whether the business reviews, changes, adopts or contractually stands behind that work.
Construction interface
Roof work, cabling, penetrations, switchboards and commissioning are physical works. The insurance submission should show how that work connects with any professional role.
Engineering boundary
Engineering services must be declared specifically; a D&C label does not automatically include every engineering discipline. Where structural, electrical or other engineering responsibility is provided, identify the qualified party and consider the relevant electrical engineer insurance requirements.
Professional indemnity or D&C wording may be relevant to a covered allegation of financial loss from declared professional services. Public liability is directed to a different category of covered third-party injury or property damage, and should not be assumed to answer a design allegation.
Physical injury or damage
Site work can create allegations about third-party injury or property damage. Public liability wording, exclusions and the damaged property all need review.
Professional loss
A claim about advice, design, documentation or coordination can be framed as financial loss. The declared professional-services scope and PI or D&C wording matter.
Defective work and rectification
Neither section should be treated as a blanket workmanship or rectification guarantee. The policy response depends on the insuring clause, exclusions and facts of the claim.
Products and performance
Supplying equipment or promising output can introduce products, contract and performance issues. Flag warranties, liquidated damages and fitness-for-purpose clauses before cover is placed.
HOW WE ASSESS THE RISK
What Solar Enquiries Show Us
Tank's enquiry history includes solar businesses that combine activities such as retail, design, installation and subcontractor management, and one with a separate software activity. We separate those activities before approaching the market because occupation descriptions and underwriting outcomes can change with the mix.
This is a fact-find method, not a promise of insurer acceptance.
The Service Mix
Retail, design, installation, commissioning, maintenance and monitoring software are listed separately.
Who Does the Work
Employees, subcontract installers or both, and how subcontractors are engaged.
Limits and Contracts
The limit a contract or accreditation body asks for, checked against the work you perform.
Historical solar enquiries reviewed by Tank have included a business with predominantly construction work and a smaller design component, and a contractor with both design and construction work. That is a reason to ask precise questions, not a statement of current insurer appetite or terms.
Contracts and responsibility
Provide customer contracts, scopes, design appointments, indemnities, performance warranties, liability caps and the entity signing each agreement.
People and consultants
Identify who designs, checks and signs off work; their licences, experience and qualifications; and the agreements and PI arrangements of subcontract designers.
Project profile
Describe typical and maximum project values, commercial or residential work, system types, building height, battery work, locations and installation methods.
Continuity and run-off
PI and D&C are commonly claims-made. Retroactive dates, continuous cover, known circumstances and run-off needs require policy-specific advice, particularly if the business changes, sells or stops professional services.
Technical and accreditation context checked 9 September 2026; SAA insurance evidence requirements checked 10 October 2026: Clean Energy Regulator, Solar Accreditation Australia and business.gov.au insurance guidance.
PRACTICAL QUESTIONS
Solar Design and Construct Insurance FAQs
It is a form of professional indemnity structured for contractors whose professional responsibility is connected to construction work. It may be relevant where a solar business designs, specifies, adopts designs or takes responsibility for the professional outcome as well as installing the system. Terms remain subject to the policy wording and insurer acceptance.
No. Public liability generally concerns covered third-party injury and property damage. D&C and PI address a different category of covered professional-services allegation. A business may need one, both or other covers depending on its activities and contracts.
Not automatically, but using an external engineer does not by itself remove the contractor's exposure. The answer depends on who contracts for, reviews, changes, adopts and accepts responsibility for the design. The contracts and insurance arrangements should be reviewed.
Do not assume so. Output guarantees, fitness-for-purpose promises, liquidated damages and liability accepted only by contract need specific wording review and may be outside the policy response.
Anonymised historical enquiries include a solar contractor with both construction and design activity, and a business with a smaller design component. They show why insurers ask who designs, who installs and what the contract promises; they do not show that terms, limits or acceptance are currently available.
SOLAR AND BATTERY INSURANCE LIBRARY
Follow the risk from design desk to energisation
Put the Full Scope in Front of the Market
Tell us what you design, supply, install, commission and maintain. We can then identify which liability sections may be relevant and approach insurers with an accurate description of the work.