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

Backup sizing, system configuration and peak-valley arbitrage math for home storage - one offline file.
Three calculators in one: how much battery you need for backup, how to configure the system, and whether peak-valley price arbitrage pays back. Enter load, backup hours, depth of discharge, efficiency and tariffs to get capacity and economics. Runs fully offline.
Home and small-business owners planning a battery storage system.
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.