
Travel Invoice Generator
Generate clean, professional travel invoices right in your browser.

Estimate home rooftop solar capacity from roof area, panel density, orientation and shading - one offline file.
Enter usable roof area and panel power density, then adjust orientation, shading and region to estimate installable rooftop capacity and panel count, with the formulas shown and a printable sizing report. Runs fully offline; your inputs never leave your device.
Homeowners sizing a rooftop solar system before talking to installers.
Every important detail, in one place.
Your download is released as soon as Paddle confirms the payment.
Check what it does, the supported languages and the license.
See who takes your payment before you pay.
The download is delivered right after payment.
Unzip and open the HTML file. No install and no account.