About the template
What this solar invoice template covers and why it gets paid faster
Solar invoices stall when serial numbers are missing and the commissioning date is unclear. The template below repeats each line from the quote with brand, capacity, and serial numbers added. The COC number and commissioning date appear on the invoice as the deliverables that justify the final payment.
Most solar installs have a deposit invoice (on acceptance, covers panel and inverter orders), a progress invoice (on install start), and a final invoice on commissioning. The template handles staged payments with the cumulative paid-to-date figure visible.
What to include
Every solar installers invoice should have these lines
Use it as a checklist when you build your invoice from scratch, or pull the QuoteGenio template that already has them.
Sample
A real solar installers invoice laid out properly
A worked example so you can see what a clean, structured version looks like before you write your own.
Invoice sample
5kW hybrid solar system · commissioning invoice
Bill to
Nomvula Sithole
+1 (555) 408 7126
29 Olive Street, Pflugerville
From
Sithole Solar
+1 (555) 320 4498
8 Trade Avenue, Cedar Park
Stage 3 of 3: commissioning complete (40% of contract)
12x Canadian Solar 455W panels (serials on attached sheet)
Sunsynk 5kW inverter (S/N SK5K-22408)
Pylontech US3000C battery 5.12kWh (S/N PYL-09842)
COC #COC-58291 issued 28 May 2026
Grid-tie application submitted (utility ref UT-2026-4421)
Sample data converted from USD to ZAR at indicative rates. QuoteGenio supports 40+ currencies and your branded business details, banking, and logo flow through automatically.
Use this template
Build your own solar installers invoice in 2 minutes
Your business name, logo, and banking details fill in automatically. Send the branded PDF via WhatsApp in one tap.
Avoid these
Common mistakes on solar installers invoices
The patterns that quietly lose jobs, get queried at payment time, or leave money on the table.
Mistake: Serial numbers missing on the invoice
Better: List or attach serial numbers for panels, inverter, and battery. Client uses them for warranty claims.
Mistake: COC number not stated
Better: Show 'COC #COC-58291 issued 28 May'. The COC is the deliverable that justifies final payment.
Mistake: Grid-tie application not referenced
Better: Add the utility reference number. Client tracks the application from this number.
Mistake: Stage percentage does not match quote
Better: Reference the stage: 'Stage 3 of 3: commissioning, 40% of contract'.
Mistake: No cumulative paid figure
Better: Show 'Paid to date: $ 5,630 of $ 9,383'.
Mistake: Commissioning certificate not attached
Better: Attach the inverter commissioning report and the COC to the invoice. Required for warranty and grid feed-in tariffs.
FAQ
Solar Installers invoice template questions
Everything solar installers ask before they switch to a structured invoice.
Stage and percentage, panel/inverter/battery serial numbers, COC number, grid-tie reference, paid to date, tax, payment terms, and banking details.
Deposit on acceptance (covers panel and inverter orders), progress at install start, balance on commissioning and COC issue.
Yes for at least the inverter and battery. Panels can attach as a separate sheet. Client uses serials for 25-year warranty claims.
14 days residential. 30 days commercial. State the due date explicitly.
Yes for residential. The COC, spec sheets, and serial number list can attach alongside the invoice.
Inverter commissioning certificate, electrical COC, warranty documents, and grid connection notification. All attached to the invoice.
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From the blog
Guides on writing better solar installers invoices
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