Red Flags and Green Flags to Look for in a Solar and Battery Installer

A solar and battery system is a major investment that hums on your roof, powers your home and shapes your electricity bills for years. But most homeowners must decide on this big decision after a brief phone call, a maze of technical specs, and a handful of similar quotes that can hide big differences in quality. Choosing the right equipment matters. But choosing the people who design, install and support it matters even more.

‍

Even the best panels, inverters and batteries fall short if they are poorly designed, installed the wrong way or matched to the wrong home. Sometimes, it’s not obvious immediately. Months down the line, you might notice your savings are less than promised, your monitoring is unreliable, warranties become a headache, or your system fails to deliver the backup power you expected.

Price alone is not the biggest indicator of who to trust as your installer. The lowest quote is not always a red flag, and the highest price does not always mean better. A smooth-talking salesperson, a shiny warranty, or the word “premium” in a proposal cannot guarantee quality installation either.

‍

The difference hides in the details: Does the installer take time to understand your electricity habits? Spell out exactly what is included? And set honest expectations for what the system can do? Will the company still pick up the phone after your system is running and the last bill is paid?

Luckily, good installers leave behind helpful clues, just as the ones to avoid leave warning signs. Here are the most important green and red flags to spot before you sign a solar or battery contract.

‍

Green Flag: They Ask to See Your Electricity Usage

‍

A reliable installer will learn your household’s unique electricity habits, exploring when and how you use power each day. That may include asking for:

• A recent electricity bill
• Your daily electricity usage
• Your solar export data
• Your evening and overnight consumption
• Whether you have electric heating, cooling, hot water or an EV
• Whether your electricity needs are likely to change

‍

For batteries, knowing your total daily usage is just the beginning. A thoughtful installer will also examine your power patterns and how much extra solar your system produces.

These details help determine whether you need solar, a battery, or both, and what size system will give you the best value.

‍

Red Flag: They Recommend a System Without Looking at Your Usage

‍

If an installer recommends a 30 kWh battery just minutes into your chat without asking about your electricity use or solar output, consider it a warning sign. Bigger isn’t always better. An oversized battery can drain your wallet without extra savings, especially if your solar panels can’t keep it charged. It should fit your home’s needs, not just whatever product the salesperson is eager to sell this month.

‍

Green Flag: The Quote Names Every Product

Your quote should clearly state the:

• Solar panel brand and model
• Inverter brand and model
• Battery brand and model
• Nominal and usable battery capacity
• Number of panels and total system size
• Mounting equipment
• Monitoring platform
• Backup equipment, if included
• Relevant product and workmanship warranties

‍

Vague labels like “premium inverter” or “tier-one panels” do not suffice. “Tier one” is not a brand, model, or guarantee of quality work. You should be able to look up every major component before signing.

‍

Red Flag: The Products Are Vague or May Change Without Approval

Watch for phrases such as:

• “Or equivalent”
• “Subject to availability”
• “Premium panels”
• “Leading battery brand”
• “Installer’s choice”

Sometimes supply issues require some flexibility, but you should never be left in the dark about product swaps. If anything needs swapping, you should approve it in writing, and the replacement must match or exceed the original in specs, warranty, and compatibility.

‍

Green Flag: A good installer will explain their recommendation in clear, simple terms you can understand.

‍

For solar, this may include:

• Roof direction and available space
• Shading throughout the day
• Expected annual generation
• Current and future electricity use
• Export limits imposed by the electricity network
• Whether panels should be spread across different roof faces

For batteries, they should explain:

• How much solar energy you currently export
• How often the battery is expected to charge fully
• How much of your evening usage it could cover
• Expected losses during charging and discharging
• Whether backup power is included
• Which circuits would operate during an outage

‍

Green Flag: Their Savings Estimates Are Based on Realistic Assumptions

‍

A big, bold savings number at the top of your quote is not enough. There should be real evidence behind those projections.

The installer should clearly explain the information used to calculate your estimated savings, including:

• Your current electricity usage
• When your household consumes the most power
• Your electricity usage and supply rates
• Your current or expected solar feed-in tariff
• The amount of solar energy you are likely to use directly
• How much electricity may be exported to the grid
• Expected solar generation based on your location, roof direction and shading
• Battery charging and discharging losses
• Whether future electricity price increases have been assumed
• Expected changes to your household, such as installing an EV, pool or electric hot water system

‍

Even tiny tweaks to these assumptions can dramatically change your payback period. A proposal might look irresistible if it assumes soaring electricity prices, near-perfect solar usage, or a battery that charges and discharges fully every day. But these rosy scenarios often do not match how your household really uses power.

‍

Ask your installer to explain where their numbers come from and whether they are tailored to your actual electricity use or based on a generic household. Request a more cautious scenario so you can see how your system might perform if prices, feed-in tariffs, or your energy habits change.

The Australian Government recommends asking installers about the assumptions behind their calculations because actual savings and payback periods depend on numerous factors and cannot be predicted with certainty. (Solar Consumer Guide)

‍

Red Flag: They Promise to Eliminate Your Electricity Bill

‍

Solar and batteries can slash your electricity costs, but promises like “no more power bills” or “never pay for electricity again” deserve scepticism. Even a massive solar setup does not guarantee total energy independence. You will still pay your retailer’s daily supply charge as long as you are connected to the grid, no matter how little power you buy. You might also need grid electricity during long stretches of cloudy weather, unexpected energy spikes, or after your battery runs out overnight.

‍

Your results will depend on several factors, including:

• How much electricity your household uses
• What time of day you use it
• The size and design of the solar system
• The battery’s usable capacity and output
• Weather conditions and seasonal generation
• Shading, panel orientation and system losses
• Electricity usage rates and daily supply charges
• Feed-in tariffs
• How household consumption changes over time

‍

Your household might use more electricity after installation, especially if you add an electric vehicle, pool, air conditioning, or a new hot water system. Not even the best installer can predict future electricity prices, the weather, or exactly how your family’s habits will change over the next ten years.

‍

A trustworthy installer will explain how much your grid usage is likely to drop and give you a realistic savings range. If someone promises a zero-dollar bill without examining your actual usage and tariff, that offer is probably just a sales pitch, not a true prediction.

‍

Do not take an accreditation logo at face value on a quote or website. Ask for the full name and accreditation number of the person designing and installing your system, and double-check those details yourself. Solar and battery installers participating in the federal Small-scale Renewable Energy Scheme must hold the relevant accreditation through Solar Accreditation Australia.

‍

Battery installations require the appropriate battery endorsement because installing storage involves different technical and safety requirements from installing rooftop solar alone.

You can check an installer’s current status through Solar Accreditation Australia.

‍

• The accreditation is current
• The name matches the person identified by the company
• The installer holds accreditation for the type of system being installed
• A battery endorsement is held when battery storage is included

‍

The installer must also hold the electrical licences required in your state or territory. Depending on where you live, you may be able to search your state’s electrical licensing register to verify that the licence is current and appropriate for the work. It is smart to check if the business selling you the system is a New Energy Tech Approved Seller. This approval covers the retailer or seller, while SAA accreditation is for the individual designer or installer. New Energy Tech Approved Sellers promise to follow consumer-protection standards for advertising, quoting, contracts, installation, warranties, and after-sales support.

‍

Accreditation cannot promise a flawless system or a perfect experience every time. But it does show that the people involved have met strict requirements and gives you an extra layer of protection and accountability if issues arise.

‍

Red Flag: The Accredited Installer Is Only a Name on the Paperwork

‍

The salesperson who prepares your quote may not be the electrician who completes the work. In many cases, the company selling the system will use subcontractors to carry out some or all of the installation. Subcontracting happens often in the solar industry and is not a problem by itself. Many skilled, qualified installers work as subcontractors. The real red flag is a retailer who will not tell you who is doing the work, cannot confirm their credentials, or uses an accredited installer’s name without that person supervising the job.

‍

The accredited installer should not exist only as a signature on the paperwork. For installations claiming federal incentives, the responsible installer has onsite attendance obligations and must physically attend the property during critical stages of the work. These include job setup, mid-installation, testing and commissioning. These requirements help ensure the installer taking responsibility for the system has genuinely overseen the work rather than approving it remotely. (Clean Energy Regulator)

‍

Before accepting the quote, ask:

• Who will physically complete the installation?
• Who is the accredited installer responsible for the work?
• Will that person attend the property during the required stages?
• Do they hold the appropriate solar or battery accreditation?
• Are the electricians appropriately licensed in your state or territory?
• Is the installation being completed by employees or subcontractors?
• Who takes responsibility for workmanship defects?
• Who handles warranty claims if the subcontractor is no longer available?
• Who should you contact if the system stops working?

‍

The company selling your system should stand by its promises, even if subcontractors are involved. You should not have to chase a mystery electrician, a distant distributor, or an overseas manufacturer while the retailer disappears.the company dodges these questions, gives you different names, or claims it will not know who is coming until installation day, take it as a clear warning sign.

‍

Green Flag: The Equipment Is Approved for Australian Installation

‍

A reputable installer will use equipment that meets Australian standards and appears on the official approved product lists. The Clean Energy Council keeps official lists of approved solar panels, inverters, and batteries. These lists prove that products have passed the required checks and meet Australian standards. Always ask for the exact brand and model number, since approval is for specific products, not just the manufacturer’s name.

‍

You should verify that:

• The exact panel model appears on the approved solar module list
• The exact inverter model appears on the approved inverter list
• The battery and its approved configuration appear on the approved battery list
• The listed model numbers match those in your written quote
• The products will remain approved on the installation date

‍

This is especially important for modular batteries. A manufacturer might offer a range of battery modules, controllers, and inverter combinations, but not every setup is approved or eligible for federal incentives. To qualify under the federal Cheaper Home Batteries Program, a battery must meet a range of eligibility requirements. These include appearing on the Clean Energy Council’s approved battery list, meeting the relevant capacity and technical requirements and being installed by a Solar Accreditation Australia-accredited installer with the appropriate battery endorsement. (Clean Energy Regulator)

‍

Just because a product is approved does not mean it is the best fit for your home. Approval means it meets certain standards, but you should also look at the manufacturer’s presence in Australia, warranty terms, monitoring features, compatibility, and track record for local support.

Before you sign anything, look up the exact brand and model in the Product Safety Australia recalls database. Recalls can hit big-name brands as well as lesser-known ones, and sometimes recalled battery cells end up inside systems sold under different names.

‍

A quality installer will clearly identify the equipment they are supplying, confirm its approval status, and tell you who will support it in Australia if there is a safety notice, recall, or warranty problem.

‍

Red Flag: They Use Government Incentives to Pressure You

‍

Government rebates, discounts and interest-free loans can make solar and battery storage more affordable. But watch out: pushy salespeople sometimes use these incentives to create urgency, turning a standard sales pitch into what feels like an exclusive government offer.

‍

Be cautious of claims such as:

• “The rebate ends tonight.”
• “There are only a few places left in your suburb.”
• “You have already been approved.”
• “This is a government-funded solar program.”
• “The government will pay for your battery.”
• “You need to sign now to secure the discount.”
• “The battery is practically free.”

‍

The federal Small-scale Renewable Energy Scheme provides an upfront discount for eligible solar and battery systems through Small-scale Technology Certificates. This reduces the purchase price, but the government does not pay the installer the entire cost of your system, and the battery is not free. State and territory programs may provide additional rebates, loans or incentives, but each has its own eligibility criteria, limits and application process. A salesperson should never imply you are approved before your circumstances are properly assessed.

‍

A trustworthy installer will clearly explain:

• Which incentive applies to the system
• Whether you meet the eligibility requirements
• How the estimated discount has been calculated
• Whether the discount is already included in the quote
• What happens if the application is unsuccessful
• Whether you are assigning the right to create STCs
• Whether the price changes if the certificate value changes
• What repayments apply if finance or a government loan is involved

‍

They should also distinguish between a rebate, an upfront certificate discount and a loan. An interest-free loan reduces the immediate financial burden but must still be repaid.

The ACCC warns solar and battery businesses against misleading consumers about prices, savings and government incentives, as well as using coercive or high-pressure sales practices. You should have enough time to understand the offer, compare quotes and decide whether the system is right for you. (ACCC) If a deal only seems tempting when you have ten minutes to decide, it probably deserves hours of careful thought instead.

‍

Green Flag: The Price and Exclusions Are Transparent

A professional quote should do more than just reveal the final price. It should spell out exactly what is included, what is left out and which site quirks might lead to extra costs.

The quote should clearly identify the cost and scope of:

• Solar panels, inverter and battery
• Mounting and electrical equipment
• Standard installation labour
• Network and grid-connection applications
• System design and commissioning
• Monitoring setup
• Backup hardware and essential-load circuits
• Removal of existing equipment
• Metering work, where applicable
• GST and any government incentive
• Travel or regional installation fees

It should also identify work that may cost extra, such as:

• Switchboard upgrades
• Three-phase equipment
• Long cable runs
• Trenching
• Difficult roof access
• Tile replacement
• Structural work
• Asbestos management
• Bollards or battery protection
• Additional backup circuits
• Relocating existing equipment
• Network-required export control equipment

‍

Not every cost can be confirmed from a satellite image or a photograph of the switchboard. A site inspection may be necessary when the roof, wiring, switchboard, proposed battery location or existing solar system cannot be properly assessed from a distance. A green flag does not mean there will never be changes. It means your installer is upfront about possible variations before you sign, and clearly explains how any extra work will be quoted and approved.

‍

You should never find out halfway through installation that the advertised price left out crucial parts needed to make your system safe, compliant, or even working at all.

‍

Red Flag: The Quote Is Suspiciously Cheap—or Expensive Without Explanation

‍

A low price is not automatically a red flag. Efficient businesses, competitive equipment pricing and straightforward installations can all produce a genuinely good-value quote.

A real warning sign is when one quote is much cheaper than the rest, but the company cannot give a clear reason for the difference.

A cheaper proposal may include:

• A smaller or lower-specification system
• Less usable battery capacity
• No blackout backup
• Lower battery output
• Shorter warranty coverage
• No switchboard work
• Minimal after-sales support
• Different panel or inverter models
• Essential work listed as an optional extra
• A product with limited Australian support

‍

Battery quotes can be difficult to compare because one company may advertise nominal capacity while another uses usable capacity. A battery described as 20 kWh may not allow the household to use the entire 20 kWh. Output also matters: two batteries with similar storage capacity may differ substantially in how many appliances they can power at once. An expensive quote deserves just as much scrutiny. Sometimes higher prices are fair because you get better equipment, a trickier installation, extra electrical work, stronger backup or more support. But fancy terms like “premium installation”, “enhanced monitoring” and “extended protection” are just words unless the quote spells out exactly what you are getting.

‍

Compare quotes based on the same:

• Product brands and model numbers
• Panel capacity
• Nominal and usable battery capacity
• Continuous and peak battery output
• Backup capability
• Number of backup circuits
• Switchboard and electrical work
• Monitoring features
• Workmanship warranty
• Manufacturer warranty
• After-sales support
• Finance costs
• Total installed price

‍

The best-value quote is not always the cheapest or the most expensive. It fits your home, clearly explains the work involved and promises support that will be there when you need it.

‍

Green Flag: They Are Honest About Battery Backup

‍

“Battery included” does not necessarily mean “your entire home will keep running during a blackout”.

Some batteries do not provide backup power unless additional equipment is installed. Others can support only selected circuits, while whole-home backup may be possible only when the battery and inverter have sufficient output, and the switchboard has been configured appropriately.

A trustworthy installer should explain:

• Whether blackout backup is included in the quoted price
• Whether backup requires additional hardware
• Which circuits will continue operating
• How quickly the system switches to backup mode
• How much power the battery can provide at once
• Which appliances may overload the system
• Whether solar can continue charging the battery during an outage
• What happens when the battery reaches its minimum charge level
• Whether three-phase appliances can be supported
• Whether manual action is required after an outage

‍

A battery might store enough energy to keep your essentials running for hours but still fall short when starting a big air conditioner, electric oven, pool pump or several appliances at once.

Ask the installer to list the proposed backup circuits in writing. These may include refrigeration, lighting, internet, selected power points and medical equipment. If you want to operate larger appliances, that requirement must be discussed during the design stage.

The answer might not always be what you want to hear, but honesty about limitations is a green flag. It is better to know what your system can do before installation than to find out the hard way during a blackout.

‍

Green Flag: The Warranty Process Is Clear

‍

Solar and battery warranties can look impressive at first glance. A quote may promote 25-year panel coverage, a ten-year battery warranty and a long workmanship guarantee, but those figures do not always explain what is covered or how a claim will be handled.

‍

A complete system can involve several separate warranties:

• Solar panel product warranty
• Solar panel performance warranty
• Inverter warranty
• Battery product warranty
• Battery capacity-retention warranty
• Battery energy-throughput or cycle warranty
• Installation and workmanship warranty
• Mounting-system warranty
• Monitoring or communications warranty
• Australian Consumer Law protections

‍

Panel performance warranties generally promise that the panels will retain a specified percentage of their original output over time. They are different from product warranties covering physical defects or failures. Battery warranties may contain several conditions. Coverage can be limited by time, total energy throughput, number of cycles or the battery’s remaining capacity—whichever limit is reached first. Usage settings, installation conditions, internet connectivity or participation in certain programs may also affect warranty terms.

‍

Before signing, ask:

• Who should you contact first if something fails?
• Will the retailer manage the claim?
• Is there an Australian manufacturer or distributor?
• Are labour and call-out costs included?
• Who pays for freight, removal and reinstallation?
• Is travel covered for regional properties?
• Does the workmanship warranty transfer if the property is sold?
• What happens if the original installer stops trading?
• Are there servicing or internet-connection requirements?
• Which battery warranty limit applies first?

‍

Automatic consumer guarantees under Australian Consumer Law apply separately from voluntary manufacturer and workmanship warranties. A business cannot simply rely on an expired written warranty to avoid all responsibility if a product has failed earlier than a reasonable consumer would expect. (ACCC)A strong warranty is great, but a clear and easy claims process truly makes a warranty valuable.

‍

Red Flag: They Disappear After Installation

‍

You often discover the true quality of a solar company after your system is installed, not while the salesperson is trying to win you over. A system can be installed without being fully operational. Network approval, meter changes, monitoring setup, retailer configuration or commissioning issues may still need resolving. If nobody takes responsibility for these final steps, you could be left with equipment that is not exporting, not charging correctly or not visible in the monitoring app.

‍

Before signing, ask who will:

• Submit the grid-connection application
• Coordinate required metering work
• Commission and test the system
• Set up your monitoring account
• Explain how to use the app
• Confirm the system is generating and exporting correctly
• Configure the battery’s operating mode
• Respond to fault alerts
• Manage warranty claims
• Provide the final compliance and handover documents

‍

Look beyond a company’s overall star rating. Read reviews describing what happened when a customer experienced a fault, installation delay or warranty problem. A five-star review written on installation day shows the team arrived on time; it does not show how the company behaves three years later when an inverter fails.

‍

Other warning signs may include:

• No clear local contact details
• Constantly changing business names
• Difficulty reaching anyone except the sales team
• Warranty enquiries redirected between multiple businesses
• Reviews describing long periods without a response
• No explanation of who provides technical support
• Pressure to post a review before commissioning is complete

‍

Every business gets the odd bad review. What matters is whether issues keep cropping up and how the company handles them when they do. They Provide a Proper Handover

Installation should not end with the team packing up and leaving you to figure out the system on your own.

‍

A professional handover should include:

• Product manuals and warranty information
• System design and equipment details
• Electrical safety and compliance documents
• Shutdown and restart procedures
• Emergency information
• Monitoring login details
• An explanation of system alerts
• Battery operating and backup instructions
• Network or metering information
• Installer and retailer contact details
• Maintenance recommendations

‍

Your installer should also prove the system is working, walk you through monitoring your solar and battery performance and show you what normal operation looks like.

For batteries, you should understand the reserve settings, charging mode and what happens during a grid outage. If the battery is configured for time-of-use charging, backup reserve or participation in a virtual power plant, those settings should be explained before handover is complete.You should never have to hunt online to find out how to safely shut down your system.

‍

Green Flag: They Tell You When Solar or a Battery Does Not Stack Up

‍

One of the strongest signs of a trustworthy installer is a willingness to recommend a less

expensive option—or advise you not to proceed at all.

Not every household needs the largest solar system or battery available. Depending on your electricity use, existing equipment and future plans, an installer may reasonably recommend:

‍

• A smaller battery
• Solar without a battery
• A battery retrofit rather than replacing the whole system
• Keeping your existing panels or inverter
• Repairing a current system before expanding it
• Waiting until more usage data is available
• Moving flexible electricity use into daylight hours
• Improving household energy efficiency first
• Delaying installation until planned renovations are complete

‍

A battery might not pay off if you use little electricity overnight, do not export enough solar to charge it or already have low grid usage. Similarly, swapping out a working solar system just to get newer gear is not always the smartest financial move. A good installer will talk you through both the upsides and the limits of the system they recommend. Their job is not to sell you the biggest system your budget can handle, but to design something that truly fits your home, your electricity use and your goals.

A Final Checklist Before You Sign

Before accepting a solar or battery quote, make sure you can answer the following questions.

About the company

• How long has the business been operating?
• Is the business name and ABN shown on the contract?
• Is the retailer a New Energy Tech Approved Seller?
• Does the company have a clear Australian contact and service process?
• Who is responsible if a subcontractor completes the installation?

About the installer

• Who designed the system?
• Who will physically install it?
• Is their Solar Accreditation Australia accreditation current?
• Do they hold the correct battery endorsement?
• Are the required electrical licences current?
• Will the responsible installer attend during the required stages?

About the equipment

• Are the exact brands and model numbers listed?
• Are the products on the relevant Clean Energy Council approved lists?
• Has the equipment been checked against current product recalls?
• What are the battery’s nominal and usable capacities?
• What are its continuous and peak power outputs?
• Is the equipment supported by an Australian manufacturer or distributor?

About the system design

• Is the recommendation based on your actual electricity use?
• Have your daytime, evening and overnight consumption been considered?
• Has shading and roof orientation been assessed?
• Can your solar system generate enough surplus electricity to charge the proposed battery?
• Have network export limits been considered?
• Are the projected savings based on realistic assumptions?

About backup power

• Is blackout backup included?
• Which circuits will remain powered?
• Can the battery run the appliances you consider essential?
• Can solar recharge the battery during an extended outage?
• Are additional backup components included in the price?

About the quote

• Is the total installed cost clear?
• Are government discounts shown and explained?
• Are finance costs and total repayments disclosed?
• Are switchboard upgrades and potential variations identified?
• What circumstances could increase the price?
• Do you need to approve additional work in writing?
• What happens if grid approval is rejected or restricted?

About warranties and support

• What product, performance and workmanship warranties apply?
• Who manages each warranty claim?
• Are labour, travel, freight and reinstallation covered?
• Who sets up monitoring and provides technical support?
• What documents will you receive after installation?
• Who should you contact if the system stops working?

‍

If the answers are vague, inconsistent or only verbal, ask for them in writing before paying a deposit.

‍

Final Thoughts

‍

Solar and battery storage can be a fantastic investment, but its real value depends on more than just the brand name on the box. A quality installation starts with a careful look at your home and how you use electricity. It carries through clear quotes, smart system design, safe installation and honest savings estimates. Most importantly, it means you get real support long after the installers have packed up.

Do not get distracted by flashy discounts, big battery numbers or promises of tiny power bills. Instead, notice if your installer asks smart questions, explains both the pros and cons, and puts every key promise in writing.

Good installers make everything easier to understand. They tell you exactly what you are getting, who will put it in, what it should do and who to call if anything goes wrong.

If a quote leaves you feeling more pressured than informed, with more promises than proof and more questions than answers, that is probably the biggest red flag of all.

‍