Insurance is the cost every solar business treats as a fixed overhead and every owner underbudgets. Roof work, electrical work, lithium batteries and a dependence on subcontractors all push premiums up, and the policy that looked adequate when the business had two people may not satisfy a head contractor when it has ten.
This guide sets out what a solar installer actually needs, what published sources suggest it costs, and how to read the cost against a job. Premiums vary by insurer, location, turnover and claims history, so every dollar figure below is a guide drawn from public comparison sources, not a quote. Get at least two before you commit.
The policies a solar business needs
| Policy | What it covers | Notes |
|---|---|---|
| Public liability | Injury or property damage to others caused by your work | Typically the first policy; often a contract requirement |
| Tools and equipment | Theft or damage of tools, stock and vehicle contents | Check whether stock in transit is included |
| Workers compensation | Injury to employees | Compulsory if you employ staff; state-based |
| Professional indemnity | Claims arising from design or advice | Relevant if you design systems or give performance advice |
| Commercial motor | Work vehicles | Separate from home or personal cover |
| Home warranty or similar | Defective residential work on larger jobs in some states | Thresholds and rules vary by state |
| Cyber | Data breach, payment fraud | Worth considering if you hold customer data |
What the published figures say
Comparison sources report that public liability for solar installers commonly falls somewhere in the range of $800 to $2,500 a year, with sole traders and small operators at the lower end. Business packs that combine public liability, tools and contents are reported at roughly $150 to $280 a month for small to medium operations. Most installers carry $5 million to $20 million of public liability, and head contractors on commercial sites often require $10 million or $20 million. Workers compensation depends on wages and the risk classification of the work, so it varies widely.
These figures are reported ranges. Your premium depends on:
- Turnover and wages. Insurers rate on the size of the business.
- The scope of work. Roof work, height, commercial installs and batteries all carry loadings.
- Claims history. Past claims raise premiums; a clean record helps.
- Qualifications and systems. Documented safety processes and accreditation help.
- Cover limits and excess. A higher excess lowers the premium.
Batteries and fire risk
Home batteries add risk. Insurers look at installer accreditation, the standards used and whether the battery is approved and installed in a compliant location. Under the Cheaper Home Batteries Program, installers must be accredited and the battery must be CEC-approved and VPP-capable, which supports an insurer’s view of your process. Tell your broker about battery work before you start it, because some policies exclude or limit it.
Putting the premium in context
Insurance is easier to judge as a cost per job. Suppose a crew does 30 jobs a month, or 360 a year, and the full insurance stack costs $9,000 a year. That is $25 a job. Compare it with the certificate value on a 6.6 kW system in a zone 3 postcode: 45 STCs at $39 is $1,755. Insurance is about 1.4 percent of that line, and one uninsured claim can be larger than a year of premiums.
The numbers change if you are a sole trader with a lower job count. A crew doing six jobs a month, with a $4,000 policy stack, pays about $55 a job. That is why very small businesses feel premiums hardest.
From the desk: the cheapest policy is rarely the right one. Check exclusions for height, batteries, commercial work and subcontractors. A policy that excludes the work you actually do is an expensive piece of paper. Ask the broker in writing whether your last three job types are covered.
Subcontractors and head contractors
If you use subcontractors, confirm their own public liability and workers compensation, and collect certificates of currency before work starts. If you subcontract to a head contractor, expect them to ask for evidence of cover, often at a stated limit. Not having it can cost you the contract. See our licensing guide for the licence side of the same checks.
How to lower the bill without losing cover
- Compare brokers and insurers. Quotes for the same cover can differ materially.
- Document safety. Safe work method statements, training records and photo records lower risk and help at renewal.
- Raise the excess if your cash flow can handle it.
- Bundle policies where a combined pack saves money, after checking exclusions.
- Keep claims low with a clean-site, test-before-handover routine.
- Pay annually if you can. Monthly instalments usually cost more.
- Review each year. Turnover, headcount and job mix change.
Insurance and cash flow
A premium is a fixed cost, so it hits hardest when cash is tight. If you pay monthly, it competes with wages and stock. Faster certificate payment lifts the pressure; see solar installer cash flow problems. Our partner program and pricing pages show how we settle and what we publish.
Reading a policy schedule
Brokers often send a schedule of premiums and a short summary. The summary is not the policy. Before you pay, read the exclusions and the definitions. Look in particular at what the policy says about work at height, work on batteries, the maximum job value, subcontractors and the geographic area. Check whether the cover includes the cost of rectifying defective work or only the damage it causes, because many policies exclude the former. Ask what evidence an insurer would want after a claim, such as photos, commissioning records and supervision logs. A solar business that already keeps those records for certificate claims is well placed, because the same documents support an insurance claim.
Insurance and certificate claims
Insurance and certificate compliance overlap more than most owners expect. A fire or water damage claim after an install can trigger questions about whether the system was installed to standard, and the photo set, the compliance certificate and the accreditation record are the evidence. Our answers on installer written statements and attendance requirements show the type of records an auditor asks for.
What to do next
- List the policies you have and the jobs they cover.
- Get two quotes for the same cover and compare exclusions.
- Check what a head contractor or retailer you work with requires.
- Read the pillar for installers at /installers/ and how to become a solar retailer.