Quick answer
A solar installer invoice in Australia should include your business details (including ABN and CEC accreditation number), an invoice number, dates, a clear description of the system (panels, inverter, mounting, install), any STC rebate applied as a discount, GST (if registered), and payment terms.
Use the copy/paste template below, or send it faster with Free Invoice App (Starter plan includes 7 sends/month, no credit card).
The solution (manual first, then faster)
Option A: Use a manual template (good in a pinch)
Manual templates work when you just need something you can copy into an email or PDF.
Option B: Use Free Invoice App (faster, more consistent)
- Save the client and job once, reuse forever
- Generate a clean PDF instantly
- Email invoices and track status (draft / sent / paid)
- Upgrade only when you need it: Starter (7 sends/month), Pro (250 sends/month), Pro+ (unlimited + custom domain + team)
Free solar installer tax invoice template (copy/paste)
Copy this into a document. If you’re GST-registered, label it “Tax Invoice” and include GST amounts.
TAX INVOICE (if GST-registered) From: Business name: [Your Solar Business Name] ABN: [Your ABN] CEC Accreditation: [Number] Phone: [Phone] Email: [Email] Bill To: Client name: [Client Name] Install address: [Job Address] Email: [Client Email] Invoice details: Invoice number: [INV-0001] Invoice date: [DD/MM/YYYY] Due date: [DD/MM/YYYY] System & install: - [Panels: 18 x 440W] $[amount] - [Inverter: 6.6kW] $[amount] - [Mounting, cabling & isolators] $[amount] - [Installation & commissioning] $[amount] Subtotal (ex GST): $[amount] GST (10%): $[amount] (only if GST-registered) Total: $[amount] Less STC rebate (assigned): -$[amount] Balance payable by customer: $[amount] Payment terms: - Balance due in [7/14] days - Bank transfer to: [Account name / BSB / Account] - Reference: Invoice number Notes: - CEC-accredited install. Thanks for your business.
STC rebates, deposits and accreditation
Most installers apply the STC (small-scale technology certificate) rebate as a point-of-sale discount — show the full system price, then the STC rebate as a clearly labelled deduction so the customer sees their net cost. Show your CEC accreditation number, and take a deposit before ordering equipment (see our deposit invoice guide). GST treatment of STCs can be nuanced — confirm with your accountant.
What needs to be on a solar tax invoice in Australia?
- Words “Tax Invoice” (if GST-registered)
- Your business name, ABN and CEC accreditation number
- The invoice date and a unique invoice number
- A description of the system and install supplied
- The total amount, STC rebate, and net amount payable
- GST amount (or that the total includes GST)
Note: This is general information and not tax advice.
Features solar installers tend to use most
- Deposit + final invoice: cover the equipment order, then bill the balance.
- Discount line for STCs: show full price then the assigned rebate.
- Add expenses: track panels, inverters and components so your margin is clear.
- Custom domain (Pro+): send from your own business email.
Conclusion: send your solar invoice today
Copy/paste the template above if you just need something quick. For deposits, STC rebates, and tracking, Free Invoice App handles the full workflow.