1 guide

Energy Tariffs Guides

Every energy tariffs guide from the SMS engineering team — practical, factual, and from the people who fit the systems.

2026-04-12· 7 min read

Octopus Flux vs Go vs Cosy: Best Tariff for Solar+Battery in 2026

A practical comparison of Octopus's three solar-friendly tariffs — what each one is best for, and which numbers to plug into your battery scheduler.

Where to go next

For whole-home backup, Tesla Powerwall installation.
For barn, shed and packhouse roofs, agricultural solar.
For sites with an O&M obligation, maintenance for commercial arrays.
If this is for a business roof, commercial solar PV.

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