Octopus Agile prices change every half hour, so the saving depends on when you charge and when you use power. A battery charges when prices are low, usually overnight, and supplies your home when prices are high, usually in the early evening.
Your saving depends on:
- how much electricity you use in the evening
- how big the battery is compared with that usage
- how often prices spike and how much you pay at peak times
Ask for a quote based on your own bills rather than a headline figure. At Solar Heaven we size each system from your usage, and we set up systems to work with smart tariffs such as Octopus Agile and Intelligent Go.
Published October 26, 2026 · All guides