Mistake 1: Using a non-accredited installer
The rebate only applies if your installer is on the Solar Accreditation Australia (SAA) register at the time of install. Some legitimate-looking businesses use sub-contracted accredited installers - meaning the company you're talking to isn't the one whose accreditation is being used. If the named accredited installer doesn't show up on site, the rebate can be denied.
How to avoid it: Ask explicitly: "Who is the SAA-accredited installer doing the install, and will they be on site for the entire job?" Get the accreditation number. Cross-check it on the SAA register before signing.
Mistake 2: Buying a battery model not on the SAA approved list
The federal Cheaper Home Batteries Program restricts eligible models to a specific list. The list grows over time but it's narrower than the marketing makes out - at launch it included Tesla Powerwall 3, Sungrow SBR-series, BYD Battery-Box Premium HVS/HVM, and a handful of others. "Brand-approved" doesn't mean "model-approved." A BYD HVS is approved; a BYD HVS variant with a different model number might not be.
How to avoid it: Ask for the exact model number in writing. Check the SAA approved products list for that specific number. Variants matter.
Mistake 3: Signing the install agreement before the rebate is lodged
For the WA Residential Battery Rebate Scheme, the rebate application must be lodged through your installer as part of the install process - not retroactively. If you sign a contract, pay a deposit and book the install, but the installer hasn't formally flagged the rebate, you may lose it.
How to avoid it: Before paying any deposit, get in writing that the installer has submitted (or will submit) the rebate application. Better: ask to see the application receipt.
Mistake 4: Claiming the rebate without owning the home
The rebate is for property owners only. Renters can't claim, even if their landlord agrees in writing to let them pay for the install. The owner must be the named claimant on the application. If the property is in a trust or company name, the rebate process is more complex - you may need additional paperwork.
How to avoid it: If you're a tenant interested in this, talk to your landlord. If you're a landlord, the rebate is available to you for rental properties - and a paid-off battery is a strong tenant retention tool given how much it reduces bills.
Mistake 5: Not stacking the federal rebate properly
The WA state rebate and the federal Cheaper Home Batteries Program are designed to stack. Both are typically handled by your installer. But we've seen quotes where the installer either (a) only applies one rebate, or (b) calculates the federal rebate incorrectly. The federal rebate is based on usable kWh - get the exact figure on your quote, not a "we'll work it out" line.
How to avoid it: Ask for two specific line items on your quote: "WA state rebate (specific amount)" and "Federal Cheaper Home Batteries rebate (specific amount based on X kWh × Y rate)". If either is missing or vague, push back.
Bonus: The "no email needed" trap
Some less-scrupulous lead generators harvest WA homeowners' details under the guise of "free rebate quote" then sell them on to up to 8 installers (not 3). Quality drops, spam increases. Always check who's behind the lead form. Ours sends to maximum 3 vetted installers and never sells data beyond that. Anyone offering "instant quotes from 6+ installers" is selling your data wider than you'd like.
The 15-minute due diligence checklist
- Confirm the SAA accreditation number on the SAA register.
- Confirm the exact battery model is on the SAA approved products list.
- Ask for both rebate amounts in writing on the quote.
- Verify the rebate application is being lodged before you pay a deposit.
- Read at least 3 recent reviews of the specific installer (not just the brand).
15 minutes. Saves the difference between a great install and one where you're chasing rebates 6 months later.