Tools

Written 26 Oct 2026Last checked 26 Oct 2026Applies to one household's method; plan facts as at 15 Oct 2026Stage Working

Calculators for your own numbers. They run in your browser; nothing is uploaded or stored.

• Free-window calculator

  Live

  Given my battery, my charge rate and a free window, how full do I get, and what is left for the evening?

  Three example plan shapes.

  Open the calculator

• Bill replay

  Planned

  What would my own meter file have cost on a tariff I type in from its fact sheet?

  Read about it

• Export break-even

  Planned

  What price does an exported battery kWh need to beat, given what it cost to charge, the round-trip efficiency and the wear?

• Paced-export planner

  Planned

  For a plan with a capped evening export rate, how can the export be spread across the window while keeping a reserve?

General information about one household's sums, not financial advice. For the whole market, the government comparators are Victorian Energy Compare and Energy Made Easy.