☀️ Free Tool — Solar Installers
Know Your Margin Before You Send the Quote
Enter your system size, materials, labour, and STC zone — instantly see net profit, margin %, effective hourly rate, and exact breakeven prices.
STC auto-calc by state & zone
4 breakevens at 0%, 10%, 15%, 20% margin
Battery aware hybrid job impact
What the Calculator Includes
🔩
Full Material Cost
Panels, inverter, mounting, cabling — plus battery if applicable
👷
True Labour Cost
Field hours plus all admin and compliance time at your actual rates
🛡️
Overhead & Warranty Reserve
Insurance, vehicle, and a statistical warranty callback provision
⚡
STC Rebate
Auto-estimated from system size and your state's deeming zone
How STC auto-calculation works: The calculator uses your system size (kW) and state to determine your Clean Energy Regulator deeming zone (1–4), then estimates the number of Small-scale Technology Certificates at the current deeming period (through 2030) multiplied by a $35 spot price. This is an estimate — your actual STC value depends on your certificate agent's price. Edit the STC field directly if you know your exact deal.
How to Use This at Quote Time
- Run it before every quote — enter the system design you're about to propose and confirm the margin hits your target before sending
- Use it to test battery add-ons — toggle battery on to instantly see how adding storage changes your job economics
- Find your minimum quote price — the breakeven table tells you the lowest price you can quote at 10%, 15%, or 20% margin
- Share with your estimator — bookmark this page; it's faster than a spreadsheet for quick in-field checks
- Adjust callback probability by job type — commercial roofs with quality mounting typically run 4–5%; residential AC installations on aging switchboards can run 12%+
Quote Faster. Invoice Instantly. Get Paid Sooner.
ServiceM8 connects your job quotes to compliance checklists, CER documentation, and automatic invoicing — so the admin cost in this calculator drops to near zero.
Start Free 14-Day Trial →