Octopus Flux Tariff

Unit Rates

Octopus Flux is a time-of-use import and export tariff designed for homes with solar panels and battery storage.

• off-peak (02:00–05:00): Cheapest import rates - ideal for charging your battery overnight.
• Peak (16:00–19:00): Highest import and export rates - best time to discharge and export energy.
• Day rate (all other times): Standard rate for typical household usage.

This structure allows users to buy electricity cheaply overnight and sell or avoid importing during peak hours, maximising savings and export revenue.

Overview

Octopus Flux is a UK tariff designed for households with solar panels and battery storage. It combines both import and export pricing into a single structure, rewarding users who shift energy usage and export to peak times.

How BatteryWiz optimises Octopus Flux

BatteryWiz automatically optimises your battery for the Flux tariff without requiring manual scheduling:

• The solver charges the battery during the 02:00–05:00 off-peak window
• The charge level is dynamically computed based on:
  • household load forecast
  • solar generation forecast
• During peak hours (16:00–19:00), BatteryWiz prioritises:
  • reducing grid import
  • exporting excess energy when beneficial

This removes the need for manual scheduling typically required by Flux tariffs.

Why optimisation matters

Octopus Flux requires users to manually align charging and discharging with tariff windows to maximise savings.

Without optimisation:

• Batteries may charge too much or too little overnight
• Solar energy may be underutilised
• Export opportunities during peak hours may be missed

BatteryWiz solves this by continuously recalculating the optimal plan based on real conditions.