Why SA homeowners should be more careful before signing solar or battery contracts

South Australians are still right to be interested in solar and batteries. Power bills, evening usage, falling feed-in returns and the federal battery discount all make home energy planning more important than ever.

But the latest consumer warning from South Australia’s Consumer and Business Services is a reminder that the decision should not be rushed. On 4 August 2026, CBS said it had seen an unprecedented spike in complaints about solar panel and battery installation, with nearly 130 complaints in the last financial year.

For homeowners, the message is not “avoid solar.” The message is “choose the right installer, ask better questions and make sure the system is properly designed before you pay a deposit.”

What the warning tells homeowners

CBS said complaints had more than doubled compared with the previous financial year and were almost triple the year before that. The issues raised included solar and battery installation delays, systems not working properly, poor after-sales communication and concerns about defective or unsafe installations.

CBS also issued a public warning notice about 1 Solar Australia Pty Ltd, trading as Solar Power Nation. In that notice, CBS said it had recorded 94 complaints between July 2025 and April 2026 about the supply and installation of solar systems and battery products.

That does not mean every solar business is a problem. It means high demand, rebates and cost-of-living pressure can create the wrong environment for rushed sales, unclear promises and weak follow-up. Homeowners need a process that protects them before, during and after installation.

The cheapest quote can become expensive if the system is wrong

A solar or battery quote is not just a price. It is a design decision for your home. The right recommendation should consider your roof, shading, switchboard, inverter, usage pattern, tariff, backup expectations, battery location and future plans such as EV charging or electric hot water.

If those details are skipped, a cheap quote can become expensive later. The system may not suit your evening usage. The battery may not be the right size. The inverter may need to be replaced. The installation location may not be practical. Or the support team may disappear once the sale is complete.

This is why a good residential solar conversation should feel more like an assessment than a quick sale. A homeowner should understand what is being installed, why that size was recommended, what is included, what is excluded and who is responsible if something needs attention later.

Battery rebates make quality checks even more important

The Australian Government’s Cheaper Home Batteries program can reduce the upfront cost of eligible small-scale batteries. That is helpful for households that want to store more of their solar energy and use it at night or during peak demand.

But a rebate should not be the only reason to choose a battery. The Clean Energy Regulator says eligible batteries must meet requirements around system size, approved products, Australian standards, installer accreditation and technical capability. It also notes that only one battery system is eligible for STCs per premises.

That makes the first decision more important. If a battery is undersized, oversized or poorly matched to the home, the homeowner may not get the outcome they expected. The rebate can reduce the purchase cost, but proper design is what helps protect the long-term value.

What to check before paying a deposit

Before signing a solar or battery contract, South Australian homeowners should ask whether the installer is properly licensed and accredited, whether the products are approved, whether the quote includes all required electrical work and whether the installer has checked the actual site conditions.

It is also worth asking how the system was sized. A proper recommendation should be based on electricity usage, when the household uses power, the available roof space, expected solar generation, battery goals and whether backup power is required. A generic package may not be enough.

Homeowners should also clarify the practical details: deposit terms, expected installation timeline, warranty process, monitoring setup, handover documents, maintenance expectations and who to contact if the system does not perform as expected.

What to do if something has already gone wrong

If a solar or battery system has not been installed, is not working properly or the company is not responding, energy.gov.au says homeowners should first contact the solar retailer or installer and explain the problem. If it is not resolved, the next step is to send a complaint letter or email.

If the company still does not resolve the issue, South Australian customers can report the matter to Consumer and Business Services SA. Where the company is an electricity retailer, the Energy and Water Ombudsman SA may also be relevant.

The best outcome is to avoid reaching that point. Clear documentation, a trustworthy installer, proper product selection and a strong support process can reduce the chance of confusion later.

How SunEnergy approaches a residential solar check

SunEnergy’s role is to help homeowners make a cleaner, more confident energy decision. That means checking the home before recommending the system, not just quoting a package from a price list.

A good residential check should look at the roof, household usage, existing solar equipment, inverter compatibility, battery suitability, backup needs, product quality, installation requirements and after-sales support. It should also explain the trade-offs clearly so the homeowner knows what they are choosing.

For some homes, the right next step may be a new solar system. For others, it may be adding a battery to existing solar, preparing for future storage or fixing the way the household uses daytime solar. The important part is that the recommendation matches the home.

The practical takeaway for SA homeowners

Solar and batteries can still be a smart move for South Australian households. The stronger point from the CBS warning is that homeowners should slow down at the contract stage and make sure the installer, product, paperwork and support are right.

Before you commit, ask for a proper residential suitability check. That gives you a clearer view of the right system size, the right battery pathway, the likely installation requirements and the support you can expect after the system is installed.

A good solar or battery system should not leave you guessing. It should help you use more of your own energy, reduce reliance on the grid where suitable and feel supported long after installation day.

Sources: Consumer and Business Services SA, 4 August 2026; Consumer and Business Services SA public warning notice, 23 July 2026; Clean Energy Regulator: Solar batteries; DCCEEW: Cheaper Home Batteries Program; energy.gov.au: Solar dispute resolution.