How Do I Compare Product, Performance and Workmanship Warranties?
Solar warranties are often presented as one headline number, but a solar system normally contains several separate warranties issued by different parties. Product warranties cover specified defects in equipment, performance warranties address the expected output of solar panels over time, while workmanship warranties cover defined installation-related defects. Buyers should compare the provider, coverage, exclusions, claim procedure, labour, transport, removal, reinstallation and local support for each warranty separately.
What Are the Main Types of Solar Warranties?
A solar proposal may refer to several warranties at the same time. Each warranty protects against a different risk and may be provided by a different company.
Panel Product Warranty
Covers defined manufacturing or material defects in the solar panel during the stated period.
Panel Performance Warranty
States how much of the panel’s rated output is expected to remain over a specified period.
Inverter Product Warranty
Covers specified inverter defects, subject to the manufacturer’s written conditions and exclusions.
Workmanship Warranty
Covers defined faults caused by installation work performed by the installer or contractor.
Waterproofing Warranty
Covers specified roof leaks connected to the solar mounting work, subject to stated conditions.
Mounting and Component Warranty
May cover rails, brackets, optimisers, monitoring devices or other system components separately.
What Does a Solar Product Warranty Cover?
A product warranty generally covers specified defects in materials or manufacturing. It does not automatically cover every reduction in output, installation damage, labour cost or roof-related problem.
| Product Warranty Item | What to Compare | Possible Limitation |
|---|---|---|
| Warranty Provider | The legal manufacturer, distributor or other named provider. | The installer may only assist with the claim and may not be the warrantor. |
| Warranty Period | The exact number of years and start date. | Different components may have different coverage periods. |
| Covered Defects | Manufacturing defects, material failure or specified faults. | Normal wear, misuse or external damage may be excluded. |
| Remedy | Repair, replacement, refund, credit or another stated remedy. | The provider may choose the remedy rather than the customer. |
| Replacement Basis | New, refurbished or equivalent replacement equipment. | An identical model may not be available in future. |
| Associated Costs | Inspection, labour, transport, removal and reinstallation. | The equipment may be covered while service costs remain excluded. |
- Exact product model is stated
- Warranty provider is identified
- Warranty period is stated
- Warranty start date is stated
- Covered defects are defined
- Excluded causes are listed
- Required installation conditions are stated
- Required operating conditions are stated
- Maintenance obligations are stated
- Claim evidence is stated
- Repair or replacement remedy is stated
- Equivalent-product substitution is explained
- Labour coverage is stated
- Transport coverage is stated
- Removal coverage is stated
- Reinstallation coverage is stated
What Does a Solar Panel Performance Warranty Mean?
A performance warranty describes the panel manufacturer’s stated output retention over time. It usually sets an initial degradation allowance and a yearly degradation rate or an output level at specified future years.
| Performance Warranty Question | Why It Matters | Possible Misunderstanding |
|---|---|---|
| What output is guaranteed? | It defines the minimum panel output curve. | Customers may mistake it for guaranteed annual system generation. |
| How is output measured? | Testing conditions determine whether the panel falls below the threshold. | Monitoring data alone may not satisfy the claim requirements. |
| Who pays for testing? | Testing and removal may be costly. | The customer may need to pay first and recover costs only if the claim succeeds. |
| What remedy is provided? | The remedy determines the practical value of the warranty. | The manufacturer may not provide a cash payment or identical replacement. |
| What causes are excluded? | External damage or improper installation may invalidate the claim. | Low output does not automatically prove panel degradation. |
What Should a Solar Workmanship Warranty Cover?
A workmanship warranty is normally issued by the installer or contracting company. It should state which installation defects are covered, the coverage period, exclusions, response procedure and responsibility for repairs.
- Electrical installation defects
- Loose or incorrect connections
- Improper cable routing
- Incorrect equipment mounting
- Mounting-system installation defects
- Sealant or flashing defects
- Installation-related roof leaks
- Incorrect inverter installation
- Incorrect protection-device installation
- Incorrect monitoring installation
- Damage caused directly by installation work
- Repair labour
- Site attendance
- Replacement of installer-supplied minor materials
- Testing after repair
- Written completion record
| Workmanship Area | What a Clear Warranty Should State | Common Exclusion to Review |
|---|---|---|
| Covered Work | The installation activities and components covered. | Work performed by another contractor may be excluded. |
| Coverage Period | The exact start date and duration. | Coverage may begin at installation, commissioning or handover. |
| Roof Leaks | The covered roof area, leak cause and repair procedure. | Pre-existing leaks and unrelated roof deterioration may be excluded. |
| Response Time | The expected acknowledgement, inspection and repair process. | A quoted response time may apply only during business hours. |
| Repair Responsibility | Who pays for labour, access equipment and materials. | Scaffolding, crane or roof-repair costs may be excluded. |
| Transferability | Whether the warranty transfers when the property is sold. | Transfer may require notification, inspection or a fee. |
What Other Solar Warranties Should Be Compared?
Panels are only one part of the system. Inverters, mounting equipment, monitoring devices, batteries and other components may each have separate warranty terms.
Inverter Warranty
Compare the standard period, optional extension, local service, replacement type, labour and communication-device coverage.
Battery Warranty
Compare years, cycle limits, energy throughput, retained capacity, operating conditions and installation requirements.
Mounting-System Warranty
Review corrosion, structural component and installation-related coverage separately.
Optimiser or Microinverter Warranty
Confirm the warranty provider, period, replacement process and labour required to access roof-mounted devices.
Monitoring Warranty
Check portal access, communication hardware, data connection, subscription charges and technical support duration.
Roof Waterproofing Warranty
Confirm whether it is part of the workmanship warranty or provided under a separate written document.
- Inverter standard warranty stated
- Inverter extension terms stated
- Battery cycle limit stated if applicable
- Battery throughput limit stated if applicable
- Battery retained-capacity threshold stated
- Mounting warranty stated
- Corrosion exclusions stated
- Optimiser warranty stated if applicable
- Microinverter warranty stated if applicable
- Monitoring hardware warranty stated
- Monitoring subscription charges stated
- Communication-device responsibility stated
- Waterproofing warranty stated
- Roof-repair process stated
- System-removal responsibility stated
- System-reinstallation responsibility stated
Which Warranty-Related Costs Should Be Compared?
A warranty can cover the defective component without covering the cost of diagnosing, removing, transporting or reinstalling it. These service costs can materially affect the practical value of the warranty.
| Possible Cost | Question to Ask | Why It Matters |
|---|---|---|
| Inspection Fee | Who pays for the initial fault inspection? | A claim may require a paid site visit before coverage is confirmed. |
| Testing Fee | Who pays for laboratory or controlled performance testing? | Performance claims may require formal testing. |
| Labour | Is technician labour included? | Replacement equipment may be free while labour remains chargeable. |
| Transport | Who pays shipping or delivery costs? | Large or specialised components can be costly to transport. |
| Access Equipment | Are scaffolding, lifts or cranes included? | Access costs can exceed the value of a small replacement part. |
| Removal | Who pays to remove the defective component? | Roof-mounted equipment may require specialised work. |
| Reinstallation | Who pays to install and recommission the replacement? | A supplied replacement is not useful until safely reinstalled. |
| Roof Repair | Who pays for any related roof or waterproofing work? | Warranty work may disturb existing roof materials. |
How Should the Warranty Claim Process Be Compared?
A warranty is more useful when the claim procedure is clear, locally supported and practical. Buyers should understand who must be contacted, what evidence is required and how long each stage may take.
Report the Fault
Identify the local contact, required information and reporting method.
Initial Diagnosis
Confirm whether remote monitoring, photographs or a site visit will be used.
Collect Evidence
Prepare serial numbers, invoices, commissioning records, monitoring data and photographs.
Submit the Claim
Determine whether the installer, distributor or customer submits the manufacturer claim.
Warranty Assessment
The provider reviews the evidence, exclusions and technical findings.
Repair or Replacement
Confirm the approved remedy, availability and expected replacement model.
Reinstallation and Testing
Determine who performs and pays for installation, testing and recommissioning.
Close the Claim
Obtain the repair report, replacement serial number and updated warranty record.
- Local claim contact is provided
- Claim submission channel is provided
- Required evidence is listed
- Serial-number records are maintained
- Invoice requirement is stated
- Installation-record requirement is stated
- Monitoring-data requirement is stated
- Site-inspection process is stated
- Testing requirement is stated
- Claim administrator is identified
- Expected acknowledgement time is stated
- Expected assessment process is stated
- Repair or replacement options are stated
- Customer costs are stated
- Recommissioning responsibility is stated
- Final documentation is provided
What Are the Main Solar Warranty Warning Signs?
- Only one headline warranty period is shown
- Warranty provider is not identified
- Product and performance warranties are treated as the same
- Workmanship warranty is not provided in writing
- Waterproofing responsibility is unclear
- Warranty start date is not stated
- Exact equipment model is not stated
- Warranty documents are unavailable before signing
- Exclusions are not provided
- Maintenance requirements are hidden
- Labour coverage is unclear
- Transport coverage is unclear
- Removal cost is unclear
- Reinstallation cost is unclear
- Testing cost is unclear
- No local claim contact is provided
- Installer says “everything is covered”
- Performance warranty is presented as guaranteed annual generation
- Warranty depends on an undisclosed third party
- Warranty becomes void for broad or vague reasons
- Property-transfer rules are unclear
- Installer-closure risk is not addressed
- Equipment substitution changes the warranty unnoticed
- Customer does not receive serial-number records
| Warranty Claim | What to Ask For | Why It Matters |
|---|---|---|
| “The panels have a 30-year warranty.” | Is it a product warranty, performance warranty or both? | The two warranties cover different risks. |
| “Everything is fully covered.” | Are inspection, labour, transport, removal and reinstallation included? | Service-related costs are often treated separately. |
| “The installer handles all claims.” | Is this obligation written into the contract? | Verbal support promises may not continue after installation. |
| “The roof is covered.” | Which roof area, causes and repair costs are covered? | Pre-existing or unrelated leaks may be excluded. |
| “Low generation is covered.” | What test proves the panel is below its warranted output? | Low generation may result from system or site conditions. |
What Is a Practical Method for Comparing Solar Warranties?
Separate Every Warranty
List panel product, panel performance, inverter, workmanship, waterproofing and component warranties separately.
Identify the Provider
Record the legal company responsible for each warranty.
Compare Coverage
Review covered defects, output thresholds and installation faults.
Compare Exclusions
Check external damage, misuse, weather, roof deterioration and unauthorised work.
Compare Customer Costs
Review inspection, testing, labour, transport, access, removal and reinstallation.
Compare Claim Support
Identify the local contact and party responsible for submitting the claim.
Check Transferability
Confirm what happens when the property or system ownership changes.
Keep the Documents
Retain invoices, serial numbers, commissioning reports, photographs and written warranty terms.
Final Solar Warranty Comparison Checklist
- Panel product warranty identified
- Panel performance warranty identified
- Inverter warranty identified
- Workmanship warranty identified
- Waterproofing warranty identified
- Mounting warranty identified
- Monitoring warranty identified
- Battery warranty identified if applicable
- Every warranty provider identified
- Every warranty period stated
- Every warranty start date stated
- Covered defects stated
- Performance threshold stated
- Measurement method stated
- Warranty exclusions reviewed
- Maintenance obligations reviewed
- Inspection costs reviewed
- Testing costs reviewed
- Labour costs reviewed
- Transport costs reviewed
- Access-equipment costs reviewed
- Removal costs reviewed
- Reinstallation costs reviewed
- Roof-repair responsibility reviewed
- Claim administrator identified
- Local claim contact provided
- Response process reviewed
- Transferability reviewed
- Installer-closure risk considered
- All warranty documents received
What Questions Should You Ask Before Accepting a Solar Warranty?
- Who provides the panel product warranty?
- Who provides the panel performance warranty?
- Who provides the inverter warranty?
- Who provides the workmanship warranty?
- Who provides the waterproofing warranty?
- When does each warranty start?
- What exact defects are covered?
- What causes are excluded?
- What maintenance is required?
- What documents must I keep?
- How is panel underperformance measured?
- Who pays for performance testing?
- Who pays for the initial inspection?
- Who pays for technician labour?
- Who pays for transport?
- Who pays for scaffolding or access equipment?
- Who pays to remove defective equipment?
- Who pays to reinstall replacement equipment?
- Who pays for recommissioning?
- Is the replacement new, refurbished or equivalent?
- What happens if the original model is unavailable?
- Who submits the manufacturer claim?
- Is there a local warranty contact?
- What is the expected response process?
- Are roof leaks covered separately?
- Which roof areas are covered?
- Does the warranty transfer when the property is sold?
- What happens if the installer stops operating?
- Will I receive all warranty documents and serial numbers?
- Which warranty-related costs remain payable by me?
What Is Solar100’s Role in Comparing Solar Warranties?
Solar100
- Supports solar-provider discovery
- Helps organise initial warranty information
- Supports quotation and warranty comparison
- Highlights differences in providers, coverage and exclusions
- Does not administer manufacturer or installer warranties
- Does not guarantee that a future claim will be approved
Selected Provider and Warranty Parties
- Provide accurate written warranty documents
- Identify every warranty provider
- Explain coverage, exclusions and customer costs
- Maintain equipment and serial-number records
- Support claims according to the agreed contract
- Remain responsible for their stated warranty obligations
Frequently Asked Questions
What is the difference between a product and performance warranty?
A product warranty generally covers specified material or manufacturing defects, while a performance warranty states the expected retained output of a solar panel over time.
What does a solar workmanship warranty cover?
It generally covers specified defects caused by the installer’s work, such as incorrect mounting, cabling, electrical connections or installation-related waterproofing faults, subject to written terms.
Does a 25-year performance warranty mean the panel will never fail?
No. A performance warranty normally relates to the panel’s output curve and is separate from the product warranty covering defined defects.
Does a panel performance warranty guarantee annual system generation?
No. Annual generation also depends on weather, shading, dirt, system design, inverter performance, wiring, outages and electricity use.
Are labour costs normally included in solar warranties?
Not automatically. The warranty documents should state whether inspection, labour, transport, removal and reinstallation are included or payable separately.
Who handles a solar manufacturer warranty claim?
Depending on the contract, the installer, distributor or customer may submit the claim. The responsible party should be identified in writing.
Is a longer solar warranty always better?
Not necessarily. The provider, covered risks, exclusions, customer costs, local support and claim process may be more important than the number of years alone.
Does a workmanship warranty cover every roof leak?
Usually not. Coverage may be limited to leaks directly caused by the solar installation and may exclude existing roof defects, ageing or unrelated damage.
What happens to the warranty if the installer closes?
Manufacturer warranties may continue according to their terms, but installer-issued workmanship or waterproofing warranties may become difficult to enforce. Buyers should consider this risk before signing.
Does Solar100 approve or administer solar warranty claims?
No. Solar100 supports provider discovery and comparison. Warranty claims are assessed and administered by the relevant manufacturer, distributor, installer or contracting party.
Compare Solar Warranties Before Choosing a Provider
Send your available solar quotations, panel and inverter models, warranty summaries, property type and roof information to compare product, performance, workmanship, waterproofing and equipment warranties, including exclusions, labour, transport, claim procedures and local support.
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