Thinking about installing solar panels, a home battery, EV charger or another clean energy system in Australia?
Choosing the right installer can be just as important as choosing the right equipment.
Solar and battery quotes can vary significantly depending on:
- System size
- Solar panel brand
- Inverter brand
- Battery capacity
- Installation requirements
- Switchboard upgrades
- Backup requirements
- Roof design
- Government incentives
- Installer experience
- Warranty and after-sales support
That is why getting multiple detailed quotes can help you understand what you are actually buying — and whether the price represents good value.
With our free Solar Authority service, we can connect you with up to three independent installers so you can compare system designs, equipment, pricing and installation options before making a decision.
The goal isn’t simply to find the cheapest quote.
It is to help you find the right combination of price, equipment, installation quality, warranty and service for your home.
The important questions are:
How much should my solar system cost? What size battery do I need? Which panels and inverter should I choose? Do I need a battery? What rebates are available? Can I get a better price by comparing installers? And which installer can I trust?
This Australian-focused guide explains what you should look for before choosing a solar or energy installer.
Ready to Compare Solar & Energy Quotes?
Compare up to three tailored options before you commit.
👉 Get 3 Free Solar & Energy Quotes
What Is the Solar Authority Service?
The Solar Authority service is designed to help Australian homeowners compare multiple solar and energy installation options without having to contact several companies individually.
Instead of speaking to one installer and accepting the first proposal you receive, you can request up to three tailored quotes based on your property and energy requirements.
Depending on your needs, your enquiry may relate to:
- Solar panels
- Home batteries
- Solar + battery systems
- EV chargers
- Solar system upgrades
- Battery upgrades
- Backup power
- Other residential clean energy solutions
Each installer can assess your requirements and recommend a system based on factors such as:
- Your property
- Roof configuration
- Electricity consumption
- Existing solar
- Future energy requirements
- Battery requirements
- EV ownership
- Installation conditions
This gives you a much better basis for making a decision than relying on a generic online price.
Why Should You Compare Multiple Solar Quotes?
Solar is a major home investment.
Two installers can recommend completely different systems for the same property.
One may recommend:
6.6 kW Solar + 5 kWh Battery
while another may recommend:
10 kW Solar + 13.5 kWh Battery
Both systems could be technically valid — but they may produce very different results in terms of:
- Upfront cost
- Solar generation
- Battery storage
- Electricity bill savings
- Backup capability
- Future energy capacity
- Payback
Getting multiple quotes allows you to understand why each installer is recommending a particular system.
Comparing three quotes can help you:
✔ Understand current market pricing
✔ Identify differences in system design
✔ Compare solar panel brands
✔ Compare inverter technology
✔ Compare battery options
✔ Understand installation costs
✔ Compare warranties
✔ Check government incentives
✔ Identify additional electrical costs
✔ Assess installer experience
✔ Avoid paying for equipment you don’t need
The objective is not to choose the lowest number.
It is to understand the value behind the number.
Why Solar Quotes Can Be So Different
Many homeowners are surprised when they receive multiple quotes for what appears to be the same solar system.
The reason is that the systems may not actually be the same.
A solar quote can vary because of:
- Panel brand
- Panel efficiency
- Panel warranty
- Inverter brand
- Inverter size
- Battery capacity
- Battery chemistry
- Mounting equipment
- Roof complexity
- Electrical work
- Switchboard requirements
- Monitoring
- Backup equipment
- Installation labour
- Warranty terms
- Installer overheads
- Government incentives
For example:
Quote A
6.6 kW solar
Premium panels
Premium inverter
Standard installation
Quote B
6.6 kW solar
Different panels
Different inverter
Switchboard upgrade
Backup equipment
The two systems may have the same advertised solar capacity but completely different specifications.
Ask every installer:
“Can you explain exactly what is included in this price and what isn’t?”
What Should Be Included in a Solar Quote?
A professional quote should provide enough information for you to understand exactly what you are purchasing.
Look for:
Solar panels
- Brand
- Model
- Number of panels
- Individual panel wattage
- Total system capacity
- Product warranty
- Performance warranty
Inverter
- Brand
- Model
- Capacity
- Warranty
- Monitoring
- Single-phase or three-phase compatibility
Battery
If included:
- Brand
- Model
- Nominal capacity
- Usable capacity
- Warranty
- Backup capability
- Expansion capability
Installation
Check whether the quote includes:
- Labour
- Mounting system
- Cabling
- Electrical protection
- Switchboard work
- Metering requirements
- Commissioning
- Grid connection
- Compliance documentation
Incentives
The quote should clearly show:
- Applicable STCs
- Battery incentives where eligible
- State or territory incentives
- Other discounts
Final price
Most importantly:
What is the actual amount I will pay after all applicable incentives and discounts?
Solar Panels: What Should You Compare?
Solar panels are not all the same.
When comparing quotes, don’t simply compare:
Panel wattage × number of panels
Look at:
- Manufacturer
- Model
- Wattage
- Efficiency
- Temperature coefficient
- Product warranty
- Performance warranty
- Degradation rate
- Panel technology
- Australian availability and support
For example, two 440 W panels can have the same nominal output but different:
- Efficiency
- Dimensions
- Warranty
- Temperature performance
- Degradation characteristics
- Manufacturer support
Ask:
“Why have you selected this particular panel for my property?”
The installer should be able to explain the recommendation.
Solar Inverters: Why the Inverter Matters
The inverter is one of the most important components in a solar system.
It converts the DC electricity produced by your solar panels into usable AC electricity for your home.
When comparing quotes, consider:
- Inverter brand
- Model
- Capacity
- Efficiency
- Warranty
- Monitoring
- Battery compatibility
- Backup capability
- Single-phase or three-phase operation
- Future expansion
A cheaper solar system isn’t necessarily better if it uses an inverter that doesn’t suit your future requirements.
Ask:
“Why is this inverter the right choice for my solar system and future energy needs?”
Home Batteries: Do You Actually Need One?
A battery can allow you to store excess solar energy generated during the day and use it later.
Without a battery:
Solar → Home → Excess → Grid
With a battery:
Solar → Home → Battery → Evening/Night Loads
A battery can be particularly useful for households with:
- High evening electricity consumption
- Low feed-in tariffs
- Large solar systems
- Electric hot water
- Pool pumps
- Air conditioning
- EV charging
- High electricity prices
However, a battery isn’t automatically the right investment for every home.
The economics depend on your:
- Electricity consumption
- Solar generation
- Electricity tariff
- Feed-in tariff
- Battery cost
- Battery size
- Battery usage
- Government incentives
Ask:
“Based on my electricity usage, do I actually need a battery — and if so, what size?”
How Big Should Your Solar System Be?
The biggest solar system isn’t necessarily the best system.
Solar sizing should consider:
- Current electricity consumption
- Future electricity consumption
- Roof space
- Roof orientation
- Roof shading
- Electricity tariff
- EV ownership
- Battery plans
- Pool
- Air conditioning
- Electric hot water
- Available network capacity
For example, a household planning to buy an EV may benefit from more solar capacity than a household with relatively low electricity consumption.
Ask:
“What annual electricity usage have you used to size my solar system?”
A good installer should be able to explain the assumptions behind the design.
How Much Does Solar Cost in Australia?
There is no single price for a solar system in Australia.
The installed price can vary depending on:
- System size
- Panel brand
- Inverter
- Roof type
- Installation complexity
- Electrical requirements
- Location
- Switchboard
- Monitoring
- Warranty
- Government incentives
A low-cost quote may look attractive, but it is important to understand what is included.
Compare:
Total system price → Incentives → Equipment → Installation → Warranty → Final out-of-pocket cost
Rather than:
Price ÷ panel capacity
Price per kW can be useful as a starting point, but it doesn’t tell you the complete value of the system.
Solar Rebates and Incentives Australia
Government incentives can significantly affect the upfront cost of solar and batteries.
The Australian Government’s Small-scale Renewable Energy Scheme (SRES) can reduce the cost of eligible rooftop solar systems through Small-scale Technology Certificates (STCs).
For eligible batteries, the Cheaper Home Batteries Program has provided support from 1 July 2025, with the government describing the support as around a 30% discount on eligible small-scale battery systems, subject to program rules.
State, territory and local programs can also provide additional rebates, loans or other assistance, and these programs can change over time.
Don’t assume every quote receives the same incentive.
Ask:
“Which incentives have been applied to this quote, and what is my final price after those incentives?”
Also ask whether the quoted price assumes any future government payment or certificate value.
Solar Installer Accreditation: What Should You Check?
Choosing the installer is just as important as choosing the equipment.
Since 2024, Solar Accreditation Australia (SAA) has been the accreditation scheme operator for solar installers and designers under the Australian Government’s SRES. The Clean Energy Council no longer administers installer accreditation.
When comparing installers, check:
- Current SAA accreditation
- Electrical licensing
- Relevant installation experience
- Battery experience
- Local reputation
- Warranty support
- Compliance history
- Business longevity
- Consumer protections
You can also consider whether the retailer participates in the New Energy Tech Consumer Code (NETCC), which is administered separately from installer accreditation. The CEC provides a consumer search for approved sellers.
Ask:
“Can you provide your current SAA accreditation details and electrical licence information?”
Don’t rely only on a logo displayed on a website.
Why Installer Experience Matters
Solar installation is not simply about putting panels on a roof.
A quality installation requires consideration of:
- Roof structure
- Panel layout
- Shading
- Electrical design
- Inverter location
- Cable management
- Switchboard
- Safety equipment
- Grid requirements
- Battery location
- Future expansion
Two installers can use exactly the same equipment and produce very different installation outcomes.
Ask:
“How many systems like mine have you installed?”
If you’re installing a battery, ask specifically about battery experience.
If you’re installing a three-phase system, ask about three-phase experience.
If you’re installing backup power, ask about backup installations.
What Should You Compare Between Three Quotes?
When your quotes arrive, don’t immediately look at the bottom-line price.
Compare them side by side.
| Category | Quote 1 | Quote 2 | Quote 3 |
|---|---|---|---|
| Solar size | |||
| Panel brand/model | |||
| Panel wattage | |||
| Inverter brand/model | |||
| Inverter size | |||
| Battery size | |||
| Usable battery capacity | |||
| Backup capability | |||
| Installation inclusions | |||
| Switchboard work | |||
| Warranty | |||
| Incentives | |||
| Final price | |||
| Installer accreditation | |||
| After-sales support |
This makes it much easier to identify whether you’re actually comparing like-for-like systems.
How to Compare Solar Quotes Properly
When comparing quotes, use a simple process.
1. Compare system size
Is each installer recommending roughly the same amount of solar?
If not, ask why.
2. Compare equipment
Check the exact:
- Panel model
- Inverter model
- Battery model
3. Compare usable battery capacity
Don’t compare only nominal battery capacity.
4. Compare installation
Check what electrical and structural work is included.
5. Compare warranties
Look at product, performance, inverter, battery and workmanship warranties.
6. Compare incentives
Make sure all quotes use the same basis.
7. Compare the final price
Compare the actual amount you will pay.
8. Compare the installer
Price is only one part of the decision.
What Does a Good Solar Quote Look Like?
A good quote should be specific, transparent and easy to understand.
You should not have to guess:
- What equipment you’re receiving
- How many panels are included
- Which inverter you’re getting
- How much battery storage you’re receiving
- What installation work is included
- What the warranty covers
- Which incentives have been applied
- What the final price is
Be cautious if a quote only says:
“10 kW Premium Solar System — $X,XXX installed.”
That’s not enough information to make a meaningful comparison.
You should be able to see the actual equipment and scope of work.
Red Flags to Watch for When Comparing Solar Quotes
Getting multiple quotes is useful partly because it can reveal potential red flags.
Be careful if an installer:
⚠ Refuses to provide equipment model numbers
⚠ Gives an unusually low price without explaining why
⚠ Uses vague warranty language
⚠ Makes unrealistic savings promises
⚠ Guarantees a specific payback period without analysing your electricity usage
⚠ Pressures you to sign immediately
⚠ Cannot explain the system design
⚠ Is unclear about who will actually perform the installation
⚠ Cannot provide current accreditation or licensing information
⚠ Does not clearly explain incentives
A professional installer should be comfortable answering detailed questions.
Should You Always Choose the Cheapest Solar Quote?
No.
The cheapest quote can sometimes be the best quote.
But price alone does not tell you:
- Equipment quality
- Installation quality
- Warranty support
- Installer experience
- System performance
- Long-term service
Imagine three quotes:
Quote A — $8,500
Basic equipment
Limited inclusions
Quote B — $10,000
Better equipment
More comprehensive installation
Stronger warranty
Quote C — $11,000
Premium equipment
Battery-ready inverter
More comprehensive support
The cheapest option may not provide the best long-term value.
Ask:
“What am I getting for the difference in price?”
That question can reveal more than simply negotiating the price down.
How Much Can Solar Save You?
Solar can reduce the amount of electricity you purchase from the grid by generating electricity at your property.
However, your savings depend on:
- Solar system size
- Household electricity consumption
- Solar generation
- Electricity prices
- Feed-in tariff
- Time of electricity use
- Battery storage
- EV charging
- System performance
A household that uses a large amount of electricity during daylight hours may achieve a different result from a household that uses most of its electricity at night.
Ask every installer:
“What annual electricity bill saving are you forecasting, and what assumptions are behind that estimate?”
A credible proposal should explain the assumptions rather than simply promise a large saving.
Solar + Battery vs Solar Only
When comparing quotes, you may receive different recommendations.
For example:
Option 1
Solar only
Option 2
Solar + battery
Option 3
Larger solar + larger battery
None is automatically correct.
The right choice depends on your energy profile.
A battery can make more sense if you have:
- High evening usage
- Large solar exports
- Low feed-in tariff
- High electricity prices
- EV charging
- Pool loads
- High air-conditioning use
Ask:
“Show me the estimated financial outcome for solar only versus solar + battery.”
This allows you to compare the additional cost against the potential additional savings.
Solar + EV Charging
If you own or plan to buy an EV, tell the installer before your system is designed.
An EV can significantly increase electricity consumption.
Your system may need to consider:
Solar → Home → Battery → EV → Grid
You may benefit from:
- More solar generation
- Smart EV charging
- Battery storage
- Time-of-use electricity
- Solar-priority charging
Ask:
“How will my solar system accommodate my future EV electricity consumption?”
Designing for the EV now can be more cost-effective than redesigning your system later.
Solar Battery Backup and Blackout Protection
Not every solar system provides backup power.
Having solar panels and a battery does not automatically mean your home will continue operating during a blackout.
Backup requires appropriate:
- Inverter
- Battery
- Backup equipment
- Electrical configuration
- Switchboard design
When comparing quotes, ask:
“Does this system provide backup power during a grid outage?”
Then ask:
“Exactly which circuits and appliances will operate during the blackout?”
If backup is important to you, compare:
- Backup capacity
- Switching
- Essential circuits
- Whole-home capability
- Battery capacity
- Inverter power
Don’t assume that a larger battery automatically provides stronger backup.
Solar System Monitoring
Monitoring can help you understand whether your solar system is performing as expected.
A good monitoring platform can show:
- Solar generation
- Household consumption
- Grid imports
- Grid exports
- Battery charging
- Battery discharge
- System performance
- Faults or alerts
When comparing three quotes, ask:
“Which monitoring platform is included, and what can I see from my phone?”
The monitoring system can become particularly important when diagnosing performance issues.
Solar Warranty: What Should You Compare?
Warranty is one of the easiest things to overlook when comparing quotes.
Don’t simply compare:
“25-year warranty.”
Find out what that warranty actually means.
Panel product warranty
Covers manufacturing defects.
Panel performance warranty
Covers expected output over time.
Inverter warranty
Usually shorter than panel performance warranties and can vary considerably by manufacturer.
Battery warranty
Check:
- Warranty period
- Capacity retention
- Throughput
- Operating conditions
Installation warranty
Ask:
“How long is the workmanship warranty?”
Most importantly:
“Who do I contact if something goes wrong five years from now?”
The quality of after-sales support matters just as much as the headline warranty period.
What Happens After You Request 3 Quotes?
Once you submit your enquiry, your requirements can be used to connect you with relevant installers.
The process is designed to be simple.
Step 1 — Tell Us About Your Energy Needs
Let us know whether you’re interested in:
- Solar
- Battery
- Solar + battery
- EV charging
- System upgrade
- Backup power
Step 2 — Provide Basic Property Information
You may be asked for information such as:
- Property location
- Roof information
- Electricity usage
- Existing solar
- Energy requirements
Step 3 — Installer Assessment
Relevant installers review your requirements and determine whether they can provide a suitable solution.
Step 4 — Receive Your Quotes
You can receive up to three tailored proposals, depending on installer availability and suitability.
Step 5 — Compare Before You Decide
Review:
System → Equipment → Installation → Warranty → Incentives → Price → Installer
Step 6 — Choose Whether to Proceed
You are under no obligation to accept a quote simply because you requested one.
What Information Should You Have Ready?
The more information you can provide, the more useful your quotes are likely to be.
If available, have:
- Recent electricity bill
- Electricity retailer
- Average electricity usage
- Existing solar system details
- Existing inverter model
- Existing battery details
- Roof information
- Property type
- EV ownership
- Pool
- Air conditioning
- Future energy plans
Your electricity bill is particularly useful because it provides real consumption information.
The better the data, the better the system design.
Who Should Get 3 Solar Quotes?
The service can be useful if you:
✅ Are installing solar for the first time
✅ Are comparing solar installers
✅ Want to add a battery
✅ Already have solar and want more storage
✅ Are replacing an old inverter
✅ Are planning to buy an EV
✅ Want backup power
✅ Want to understand current market pricing
✅ Have received a quote but aren’t sure whether it represents good value
You May Especially Benefit If:
⚠ You have only received one quote
⚠ You don’t understand the equipment being proposed
⚠ Different installers are recommending different system sizes
⚠ You aren’t sure whether you need a battery
⚠ You want to compare premium and budget equipment
⚠ You want to understand your available incentives
When Should You Get Multiple Solar Quotes?
The best time to compare is before you sign a contract.
If you already have one quote, you can still compare it.
In fact, having an existing quote can make the comparison more useful because you can ask other installers to explain differences in:
- System size
- Equipment
- Price
- Battery
- Warranty
- Installation
- Savings
Don’t wait until you’ve already committed.
Compare first.
Decide second.
Why Compare 3 Quotes Instead of 10?
More isn’t always better.
Contacting ten or fifteen installers can become difficult to manage.
You may receive:
- Repeated phone calls
- Different system designs
- Conflicting recommendations
- Different assumptions
- Too much information
Three well-matched quotes can provide enough information to identify:
Low price → Mid-market option → Premium option
This can make the decision easier without overwhelming you.
The goal is meaningful comparison, not simply collecting as many quotes as possible.
12 Questions to Ask Before Choosing a Solar Installer
Before signing your contract, ask:
- What exact solar panels am I receiving?
- What exact inverter model is included?
- What is the total system size?
- If a battery is included, what is its usable capacity?
- What is included in the installation price?
- Are there any additional electrical or switchboard costs?
- Which government incentives have been applied?
- What warranties apply to the panels, inverter, battery and installation?
- Who will actually install my system?
- Is the installer currently SAA-accredited and appropriately licensed?
- What happens if I have a problem after installation?
- What annual bill saving are you forecasting and what assumptions support it?
Getting clear answers to these questions can make comparing three quotes significantly easier.
How to Choose the Best Quote
After receiving your quotes, don’t immediately choose the cheapest.
Instead, score each proposal across five areas:
1. System Design
Does the system actually match your energy requirements?
2. Equipment
Are the panels, inverter and battery appropriate and reputable?
3. Installation
Is the installer experienced and appropriately accredited?
4. Warranty & Support
What happens if something fails?
5. Price
What is the final amount you will actually pay?
The best quote is usually the one that provides the strongest overall value, not necessarily the lowest price.
Is Getting 3 Solar Quotes Worth It?
Yes — particularly for a major home energy investment.
Solar, batteries and EV energy systems can involve thousands of dollars in equipment and installation.
Even a relatively small difference in system design or pricing can have a significant effect on the long-term value of your investment.
Getting multiple quotes gives you the opportunity to:
Compare → Question → Negotiate → Understand → Decide
Instead of:
Quote → Sign → Hope
You don’t have to become a solar expert before choosing a system.
You simply need enough information to understand what you’re being offered.
Get 3 Free Solar & Energy Quotes
Choosing solar isn’t just about finding the cheapest system.
It’s about finding the right combination of:
System Size → Equipment → Installation → Warranty → Energy Savings → Support → Final Price
With our Solar Authority service, you can compare up to three tailored options before making your decision.
Whether you’re considering:
- Solar panels
- Home batteries
- Solar + battery
- EV charging
- Backup power
- A solar upgrade
comparing multiple proposals can help you make a more informed decision.
👉 Get 3 Free Solar & Energy Quotes
Tell us about your property and energy requirements and compare your options before you commit.
Free to enquire. No obligation to proceed.
