Top Solar Companies in Australia, New Zealand, Canada & USA (2026): Best Residential, Commercial and Solar PPA Providers Compared
Compare the top solar companies in Australia, New Zealand, Canada, and the United States. Discover the best residential and commercial solar installers, solar PPA providers, battery specialists, financing options, and expert tips for choosing the right solar company in 2026.
The global solar energy industry continues to expand as homeowners, businesses, and governments invest in renewable energy to reduce electricity costs and lower carbon emissions. Advances in photovoltaic technology, battery storage, and energy management systems have made solar power more efficient and affordable than ever before.
Top Solar Companies in Australia, New Zealand, Canada & USA
For property owners planning a residential or commercial solar installation, selecting the right solar company is one of the most important decisions in the entire project. Equipment quality, installation experience, warranty support, financing options, and after-sales service can have a significant impact on system performance over the next 25 years or more.
Australia, New Zealand, Canada, and the United States each have mature solar markets with hundreds of installers and developers competing for residential and commercial customers. While many companies offer similar products, the best providers distinguish themselves through engineering expertise, certified installation teams, long-term customer support, and transparent pricing.
This guide explains what separates leading solar companies from the rest of the market and outlines the criteria homeowners and business owners should consider before requesting quotations.
Why Choosing the Right Solar Company Matters
A solar system is a long-term investment that typically operates for decades.
Selecting an experienced installer can help ensure:
Proper system design
Safe electrical installation
Maximum energy production
Compliance with local regulations
Reliable warranty support
Long-term maintenance assistance
Better return on investment
A high-quality installation often produces greater lifetime savings than a lower-priced system installed without careful planning.
Residential vs Commercial Solar Companies
Although many installers work in both sectors, residential and commercial projects have different requirements.
Residential Solar Companies
Residential specialists typically focus on:
Detached houses
Townhouses
Apartments
Battery storage
Electric vehicle charging
Smart home energy systems
Most residential installations range from 3kW to 15kW.
Commercial Solar Companies
Commercial solar contractors usually design larger systems for:
Office buildings
Warehouses
Manufacturing facilities
Retail centres
Schools
Hospitals
Agricultural operations
Commercial installations often require detailed engineering studies, structural assessments, and long-term energy management planning.
What Makes a Top Solar Company?
The best solar companies are evaluated using more than just installation price.
Important considerations include:
Industry Experience
Established companies often have:
Experienced engineering teams
Qualified electricians
Certified installation technicians
Extensive project portfolios
Years of experience can be particularly valuable for complex projects.
Product Quality
Leading installers typically offer:
High-efficiency solar panels
Reliable inverters
Premium battery systems
Advanced monitoring software
Equipment quality directly affects long-term energy production.
Installation Standards
Professional installation includes:
Detailed site inspections
Correct roof mounting methods
High-quality electrical work
Waterproof roof penetrations
Compliance with applicable electrical standards
Poor installation practices may reduce system performance and affect warranty coverage.
Customer Support
After-sales service remains an important factor.
The best providers usually offer:
Performance monitoring
Warranty assistance
Technical support
Maintenance services
System inspections
Long-term customer support is especially valuable for systems expected to operate for 25 years or longer.
Solar Market Overview
Australia
Australia has one of the highest rates of residential rooftop solar adoption in the world.
Strong sunshine, competitive installation costs, and widespread consumer awareness have created a highly competitive market with experienced installers operating nationwide.
Common residential systems include:
6.6kW
8kW
10kW
Battery storage
Hybrid solar systems
Commercial solar adoption also continues to grow rapidly.
New Zealand
The New Zealand solar market has expanded steadily over recent years.
Growth has been supported by:
Rising electricity prices
Improved battery technology
Increased interest in energy independence
Expanding residential installations
Sustainable building practices
Battery storage is becoming increasingly popular for homeowners seeking greater self-sufficiency.
Canada
Canada's solar market varies considerably between provinces.
Residential demand continues to increase as homeowners invest in:
Energy-efficient homes
Battery storage
Electric vehicle charging
Renewable energy upgrades
Commercial and utility-scale solar development remains an important part of Canada's clean energy transition.
United States
The United States has one of the largest and most diverse solar industries globally.
The market includes:
Residential installers
Commercial EPC contractors
Utility-scale developers
Solar leasing companies
Power Purchase Agreement (PPA) providers
Battery storage specialists
Competition has encouraged continuous innovation across equipment, financing, and customer service.
Solar Business Models
Different solar companies specialise in different types of projects.
Turnkey Installation
The installer manages every stage of the project, including:
Design
Engineering
Equipment supply
Installation
Commissioning
Customer support
This is the most common model for residential projects.
Engineering, Procurement and Construction (EPC)
Commercial EPC contractors manage larger projects involving:
Detailed engineering
Procurement
Construction
Grid connection
Long-term maintenance
These projects often involve schools, commercial buildings, factories, and utility-scale installations.
Solar Power Purchase Agreements (PPA)
Some commercial providers offer Power Purchase Agreements.
Under a PPA, the provider typically owns and maintains the solar system while the customer purchases the electricity generated under a long-term agreement.
PPAs are commonly used by:
Businesses
Schools
Industrial facilities
Government organisations
Availability varies by country and region.
Services Offered by Leading Solar Companies
Top installers frequently provide:
Residential solar installation
Commercial solar systems
Battery storage
Hybrid solar systems
Electric vehicle charging integration
Solar monitoring platforms
Maintenance programs
System upgrades
Some companies also offer financing assistance or guidance on available renewable energy incentives.
Questions to Ask Before Choosing a Solar Company
Before requesting quotations, homeowners should consider asking:
| Question | Why It Matters |
|---|---|
| How many years has the company been operating? | Demonstrates industry experience |
| Are installers appropriately licensed? | Supports installation quality |
| Which solar panel brands are offered? | Affects long-term performance |
| What warranties are included? | Protects the investment |
| Is battery storage available? | Supports future energy independence |
| Does the company provide maintenance services? | Helps maximise system lifespan |
Comparing multiple installers helps homeowners identify the provider that best matches their budget, energy requirements, and long-term expectations.
Planning Your Solar Investment
Before selecting a contractor, gather:
| Information | Purpose |
|---|---|
| Recent Electricity Bills | Estimate system size |
| Roof Orientation | Assess solar production |
| Roof Material | Determine installation method |
| Future EV Charging Plans | Size the system appropriately |
| Battery Interest | Plan for future energy storage |
| Budget | Compare suitable system options |
Proper planning improves the likelihood of selecting the most suitable installer and system configuration.
Here is Part 2 of the article.
Leading Solar Companies in Australia, New Zealand and Canada
Australia, New Zealand, and Canada each have well-established renewable energy industries with experienced installers serving residential, commercial, agricultural, and industrial customers. While every company has its own strengths, the best providers generally focus on system quality, certified installation teams, transparent pricing, and reliable after-sales support.
Instead of choosing a provider based solely on advertising or the lowest quotation, homeowners should compare installation experience, warranty coverage, financing options, equipment quality, and customer service.
Leading Solar Companies in Australia
Australia has one of the most competitive rooftop solar markets in the world. Homeowners can choose from national installers as well as highly regarded regional specialists.
Several companies have built strong reputations through long operating histories, nationwide service networks, and extensive installation experience.
Solahart
One of Australia's longest-established solar brands, Solahart is widely recognised for residential solar water heating and photovoltaic systems.
Common services include:
Residential solar panels
Battery storage
Solar hot water
Energy monitoring
Commercial solar solutions
Strengths include:
Long operating history
National dealer network
Strong warranty support
Broad product selection
Solargain
Solargain provides residential and commercial renewable energy systems throughout much of Australia.
Services typically include:
Rooftop solar
Battery installation
Electric vehicle charging
Commercial solar engineering
The company has completed thousands of residential installations across multiple states.
RESINC Solar
RESINC Solar has developed a strong reputation for customer satisfaction and customised residential installations.
Popular services include:
Home solar systems
Battery storage
Hybrid systems
Solar maintenance
Many homeowners appreciate the company's focus on tailored system design rather than standard packages.
Comparing Australian Solar Companies
| Company | Residential | Commercial | Battery Storage | Nationwide Coverage |
|---|---|---|---|---|
| Solahart | Yes | Yes | Yes | Yes |
| Solargain | Yes | Yes | Yes | Yes |
| RESINC Solar | Yes | Limited Commercial | Yes | Selected Regions |
Every installer may offer different equipment brands and financing options depending on the project.
Leading Solar Companies in New Zealand
New Zealand's residential solar market continues to expand as more households seek lower electricity costs and greater energy independence.
Several companies have become recognised for quality installations and nationwide service.
solarZero
solarZero is well known for offering integrated solar and battery solutions.
Key services include:
Residential solar
Home battery storage
Smart energy management
Performance monitoring
The company has helped accelerate residential battery adoption across New Zealand.
Harrisons Solar
Harrisons Solar operates nationally and provides both residential and commercial installations.
Typical services include:
Solar panel installation
Battery storage
Solar financing guidance
Energy consultations
Its nationwide network makes it one of the country's better-known residential solar providers.
Lodestone Energy
Unlike traditional residential installers, Lodestone Energy focuses primarily on large-scale solar generation.
Areas of expertise include:
Utility-scale solar farms
Commercial renewable energy
Large infrastructure projects
Grid-connected generation
Although homeowners typically work with residential installers, companies such as Lodestone contribute significantly to New Zealand's renewable energy capacity.
Comparing New Zealand Solar Companies
| Company | Residential | Commercial | Utility Scale | Battery Storage |
|---|---|---|---|---|
| solarZero | Yes | Limited | No | Yes |
| Harrisons Solar | Yes | Yes | No | Yes |
| Lodestone Energy | No | Yes | Yes | Limited |
Choosing between providers depends largely on project size and energy requirements.
Leading Solar Companies in Canada
Canada's solar industry varies by province, with different installers serving residential, commercial, agricultural, and utility-scale markets.
Some organisations focus primarily on manufacturing, while others specialise in engineering and installation.
Canadian Solar
Canadian Solar is one of the world's largest solar technology companies.
The company is recognised for:
High-efficiency photovoltaic modules
Battery energy storage solutions
Utility-scale project development
Commercial solar engineering
Its products are widely installed across North America, Australia, Europe, and Asia.
Regional Installation Specialists
Across Canada, many experienced regional contractors provide:
Residential rooftop solar
Agricultural solar systems
Commercial rooftop installations
Battery storage
Electric vehicle charging integration
Working with an experienced local installer often provides advantages such as familiarity with provincial regulations, weather conditions, and permitting requirements.
Residential vs Commercial Installation
When comparing providers, homeowners should understand that residential and commercial installations differ significantly.
Residential Projects
Typical characteristics include:
5kW–15kW systems
Rooftop installation
Battery integration
Electric vehicle charging
Home energy monitoring
Commercial Projects
Commercial systems often involve:
Larger system capacities
Structural engineering
Demand analysis
Long-term maintenance contracts
Energy management software
Commercial contractors usually employ dedicated engineering and project management teams.
What Makes These Companies Stand Out?
Leading solar companies generally share several important characteristics.
Engineering Expertise
Professional engineering improves:
System sizing
Panel placement
Energy production
Electrical safety
Long-term reliability
Premium Equipment
Top installers typically offer equipment from recognised manufacturers with:
High conversion efficiency
Long product warranties
Proven durability
Advanced monitoring features
Customer Support
Reliable after-sales service may include:
Performance monitoring
Warranty assistance
Maintenance programs
Technical support
System inspections
Long-term support is especially valuable because solar systems commonly operate for 25 years or more.
Comparing Residential Installation Services
| Service | Australia | New Zealand | Canada |
|---|---|---|---|
| Rooftop Solar | Yes | Yes | Yes |
| Battery Storage | Yes | Yes | Yes |
| EV Charger Integration | Yes | Yes | Yes |
| Commercial Solar | Yes | Yes | Yes |
| Utility Scale Development | Yes | Yes | Yes |
Although many companies offer similar services, installation quality and long-term customer support remain important differentiators.
Preparing Before Requesting Quotes
Before contacting installers, prepare:
Recent electricity bills
Roof dimensions
Roof orientation
Property photographs
Planned battery storage
Electric vehicle charging plans
Budget expectations
Providing this information allows installers to prepare more accurate proposals and recommend appropriately sized systems.
Top Solar Companies in the United States: Residential Installers, Commercial EPC Contractors and Solar PPA Providers
The United States has one of the world's largest and most competitive solar industries. Thousands of installers operate across residential, commercial, industrial, and utility-scale markets, offering a wide range of financing models, battery storage solutions, and long-term maintenance services.
Choosing the right company depends on more than price. Homeowners and business owners should evaluate experience, equipment quality, engineering capability, warranty coverage, financing options, and customer support before making a decision.
This section highlights several well-known companies that have established significant positions in the U.S. solar market and explains the differences between residential installers, commercial engineering firms, and Power Purchase Agreement (PPA) providers.
Largest Residential Solar Companies in the United States
Several companies have built nationwide operations serving homeowners throughout multiple states.
These providers generally offer:
Rooftop solar systems
Home battery storage
Energy monitoring
Financing options
Maintenance services
Electric vehicle charging integration
Sunrun
Sunrun is one of the largest residential solar providers in the United States.
Its services typically include:
Residential solar installation
Home battery systems
Solar leasing
Financing options
Energy monitoring
Sunrun has expanded through both direct sales and partnerships with home improvement retailers, making it one of the most recognised residential solar brands in North America.
NextEra Energy
NextEra Energy is one of North America's largest renewable energy companies.
Although widely recognised for utility-scale renewable energy projects, the company also contributes significantly to:
Utility-scale solar generation
Battery energy storage
Renewable infrastructure
Grid modernisation
Clean energy development
Its primary focus differs from traditional residential installers, but its influence on the renewable energy sector is substantial.
Canadian Solar
Although headquartered in Canada, Canadian Solar has a major presence throughout the United States.
The company is known for:
High-efficiency photovoltaic modules
Utility-scale solar development
Battery energy storage
Commercial solar engineering
Its products are commonly installed by independent solar contractors across residential and commercial markets.
Residential Installation Comparison
| Company | Residential Solar | Battery Storage | Financing | Nationwide Presence |
|---|---|---|---|---|
| Sunrun | Yes | Yes | Yes | Yes |
| Canadian Solar* | Equipment Supplier | Yes | Through Partners | International |
| NextEra Energy | Limited Residential | Utility Focus | Project-Based | Nationwide |
*Canadian Solar primarily manufactures equipment and develops projects. Residential installations are generally completed by authorised installers or independent contractors.
Top Commercial Solar Companies
Commercial solar projects require specialised engineering, procurement, construction, and long-term maintenance.
Leading commercial contractors commonly provide:
Engineering design
Structural analysis
Utility coordination
Grid connection
Project management
Performance monitoring
Commercial projects typically range from several hundred kilowatts to multi-megawatt installations.
Commercial EPC Contractors
Engineering, Procurement and Construction (EPC) companies manage every phase of a commercial solar project.
Typical responsibilities include:
Site assessment
System engineering
Equipment procurement
Construction
Electrical integration
Testing and commissioning
Businesses often prefer turnkey EPC solutions because a single contractor manages the entire project lifecycle.
Utility-Scale Solar Developers
Large renewable energy developers focus on projects supplying electricity directly to the grid.
Typical projects include:
Solar farms
Battery storage facilities
Grid-connected renewable energy
Utility infrastructure
These projects differ significantly from residential rooftop installations in both scale and engineering complexity.
Understanding Solar Power Purchase Agreements (PPA)
A Power Purchase Agreement (PPA) is a financing arrangement commonly used by commercial organisations and, in some markets, residential customers.
Instead of purchasing the solar system outright, the customer agrees to buy the electricity generated by the system over a fixed contract period.
Typical characteristics include:
Lower upfront investment
Professional system maintenance
Long-term electricity pricing
Performance guarantees in some agreements
The exact structure varies according to provider and jurisdiction.
Best Solar PPA Providers
PPA availability differs by region, but companies offering this type of arrangement often focus on:
Commercial buildings
Schools
Hospitals
Government facilities
Industrial operations
Before entering a PPA, organisations should carefully review:
Contract duration
Pricing structure
Escalation clauses
Ownership arrangements
End-of-contract options
Independent legal and financial advice may also be appropriate for large commercial agreements.
Residential Purchase vs Solar Lease vs PPA
| Option | Ownership | Upfront Cost | Maintenance Responsibility |
|---|---|---|---|
| Cash Purchase | Homeowner | High | Homeowner |
| Solar Loan | Homeowner | Medium | Homeowner |
| Solar Lease | Provider | Low | Provider |
| Power Purchase Agreement | Provider | Low | Provider |
Each option has advantages depending on financial goals, available capital, and long-term property plans.
What to Look for in a Solar Company
Before selecting an installer or developer, compare:
Experience
Look for companies with:
Proven project history
Qualified engineering teams
Licensed electricians
Strong safety record
Equipment
Evaluate:
Solar panel efficiency
Inverter quality
Battery compatibility
Product warranties
Customer Support
Reliable providers usually offer:
Performance monitoring
Warranty assistance
Maintenance programs
Technical support
System inspections
Financial Stability
Because solar systems commonly operate for 25 years or more, choosing a financially stable company can improve long-term support and warranty confidence.
Questions to Ask Before Signing
Before approving a quotation, ask:
Which solar panels are included?
Which inverter is recommended?
Is battery storage available?
What monitoring software is included?
What warranties apply?
Can the system be expanded later?
What maintenance services are offered?
Detailed answers help homeowners compare proposals objectively.
Residential and Commercial Service Comparison
| Feature | Residential Installer | Commercial EPC | Utility Developer |
|---|---|---|---|
| Home Solar | Yes | Limited | No |
| Commercial Buildings | Limited | Yes | No |
| Battery Storage | Yes | Yes | Yes |
| Utility-Scale Projects | No | Limited | Yes |
| Long-Term Maintenance | Yes | Yes | Yes |
Understanding these distinctions helps property owners choose a company that specialises in the type of project they require.
Planning a Successful Solar Project
Whether installing solar on a family home or a commercial facility, preparation remains essential.
Before requesting quotations:
Review recent electricity consumption.
Assess roof condition and orientation.
Consider future electric vehicle charging.
Evaluate battery storage requirements.
Compare several qualified installers.
Review financing options.
Understand warranty coverage.
Good planning often results in stronger long-term performance and better financial outcomes.
Solar Company FAQ, Warranty Comparison and Expert Buying Guide
Selecting a solar company is a decision that can affect your property's energy performance for decades. While solar panels, inverters, and battery systems receive most of the attention, the installer's experience and long-term support are equally important.
A professionally designed system should deliver reliable electricity generation, comply with local electrical standards, and provide ongoing support through product warranties, monitoring services, and maintenance programs.
Whether you are planning a residential rooftop system in Australia, a commercial installation in Canada, a battery upgrade in New Zealand, or a Power Purchase Agreement in the United States, understanding how to compare solar companies will help you make a more informed investment.
Frequently Asked Questions
Which type of solar company is best?
The answer depends on your project.
| Project Type | Recommended Provider |
|---|---|
| Residential Home | Residential Solar Installer |
| Apartment Complex | Multi-Residential Solar Specialist |
| Warehouse | Commercial EPC Contractor |
| Manufacturing Facility | Industrial Solar Engineering Company |
| Utility Project | Utility-Scale Solar Developer |
Working with a company that regularly completes similar projects usually improves installation quality and long-term reliability.
Should I choose the cheapest quotation?
Not always.
A lower quotation may exclude important items such as:
Premium solar panels
Battery-ready inverters
Monitoring software
Extended workmanship warranties
Roof repairs
Electrical upgrades
Ongoing maintenance support
Comparing total project value is generally more effective than comparing price alone.
What warranties should I expect?
Most professionally installed solar systems include several different warranties.
| Warranty Type | Typical Coverage |
|---|---|
| Solar Panel Product Warranty | Manufacturing defects |
| Solar Panel Performance Warranty | Long-term energy output |
| Inverter Warranty | Equipment performance |
| Battery Warranty | Storage performance and product defects |
| Installation Warranty | Workmanship provided by the installer |
Warranty duration varies by manufacturer and installer, so homeowners should review documentation carefully before signing a contract.
Can one company provide everything?
Many leading providers offer complete turnkey solutions, including:
Site assessment
System design
Engineering
Equipment supply
Installation
Grid connection
Battery integration
Monitoring software
Maintenance services
A single contractor managing the entire project often simplifies communication and ongoing support.
Is battery storage worth adding?
Battery storage may be beneficial for households or businesses that:
Consume significant electricity after sunset.
Want greater energy independence.
Plan to install an electric vehicle charger.
Wish to maximise self-consumption of solar generation.
Want backup power capability where supported by the system design.
The ideal battery size should be based on actual electricity usage rather than property size alone.
Annual Solar Maintenance Checklist
Regular maintenance helps maintain system performance and supports long-term reliability.
| Maintenance Task | Recommended Frequency |
|---|---|
| Review Monitoring App | Monthly |
| Visual Roof Inspection | Every 6–12 Months |
| Check Inverter Status | Monthly |
| Professional Electrical Inspection | Every 1–2 Years |
| Clean Solar Panels (if required) | Every 12–24 Months |
| Battery Inspection | Annually |
| Roof Condition Assessment | Every 2–3 Years |
Maintenance requirements may vary depending on local climate and environmental conditions.
Warning Signs That Require Professional Inspection
Arrange an inspection if you notice:
Unexpected reduction in energy production.
Inverter warning lights or fault messages.
Battery charging problems.
Loose or damaged mounting hardware.
Water leaks around roof penetrations.
Visible damage to solar panels.
Significant increases in electricity bills without a clear explanation.
Early maintenance can often prevent more expensive repairs later.
Questions to Ask Before Choosing a Solar Installer
Before approving a quotation, consider asking:
How long has the company been installing solar systems?
Are electricians and installers appropriately licensed?
Which panel, inverter, and battery brands are recommended?
Does the quotation include monitoring software?
Is the system expandable in the future?
What workmanship warranty is included?
Is ongoing maintenance available?
Comparing answers from several providers makes it easier to evaluate long-term value.
Residential vs Commercial Service Comparison
| Feature | Residential Installer | Commercial EPC | Utility Developer |
|---|---|---|---|
| Rooftop Solar | Yes | Yes | Limited |
| Battery Storage | Yes | Yes | Yes |
| Energy Monitoring | Yes | Yes | Yes |
| Large Industrial Projects | Limited | Yes | Yes |
| Utility-Scale Solar Farms | No | Limited | Yes |
Choosing the correct type of contractor helps ensure the project is designed for its intended application.
Expert Recommendations
When comparing solar companies across Australia, New Zealand, Canada, and the United States, consider the following best practices:
Request at least three detailed quotations.
Compare equipment specifications, not just installation prices.
Review product and workmanship warranties carefully.
Confirm that the proposed system matches your current and future electricity needs.
Choose installers with a strong reputation for after-sales support.
Verify licensing, insurance, and relevant certifications.
Consider battery storage if your household has significant evening electricity consumption or plans to add electric vehicle charging.
A well-designed system installed by an experienced contractor often delivers better long-term value than a lower-cost installation with limited support.
Key Factors That Differentiate Leading Solar Companies
The most reputable providers typically demonstrate strength in several areas:
| Evaluation Factor | Why It Matters |
|---|---|
| Industry Experience | Proven installation expertise |
| Product Quality | Higher efficiency and reliability |
| Engineering Capability | Better system performance |
| Financial Stability | Long-term warranty confidence |
| Customer Reviews | Insight into service quality |
| Monitoring Technology | Easier performance tracking |
| After-Sales Support | Faster issue resolution |
| Financing Options | Greater affordability |
Evaluating companies across these categories provides a more complete picture than comparing price alone.
Long-Term Benefits of Choosing a Quality Solar Installer
Selecting an experienced solar company can contribute to:
Higher energy production over the system's lifetime.
Improved installation quality and electrical safety.
Better warranty support.
Easier future upgrades, including battery storage.
Reduced maintenance issues.
Increased confidence in long-term system performance.
Because residential and commercial solar systems are expected to operate for 25 years or more, installer quality can have a lasting impact on overall value.
Final Thoughts
The solar industry continues to expand rapidly across Australia, New Zealand, Canada, and the United States as households and businesses invest in renewable energy, battery storage, and smart energy management technologies.
Whether you are comparing the top solar companies in the USA, evaluating commercial solar EPC contractors, researching Power Purchase Agreement (PPA) providers, or searching for the best residential solar installer, the most successful projects begin with careful planning and a thorough comparison of qualified providers.
Rather than focusing solely on installation cost, consider the complete value offered by each company, including engineering expertise, product quality, warranty coverage, monitoring technology, financing options, and long-term customer support. A professionally designed solar system backed by experienced installers and reliable equipment can provide decades of clean energy, lower electricity costs, and increased energy independence.
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