The useful starting point
Flux and Intelligent Go serve different household arrangements. First establish which offers are available and compatible with your equipment, then compare the complete electricity bill.
Start with the reason each tariff exists
Octopus describes Flux around solar and battery import/export use. Intelligent Octopus Go is associated with smart EV charging. That difference matters: the right comparison starts with the equipment and loads you have, not a single low unit rate.
Product names that sound similar can have different control requirements. In particular, do not treat standard Flux and Intelligent Flux as interchangeable. Check the exact tariff name, availability and conditions on the supplier’s live pages.
Eligibility comes before savings
Check your meter, EV or charger compatibility, battery arrangement and the way the supplier controls charging. Ask which export tariff can be paired with the import offer. Old advice about EV tariff compatibility may no longer reflect the supplier’s current rules.
We deliberately do not reproduce a fixed “today’s rates” table here. Rates, availability, regions and terms can change. Obtain both offers directly and keep their effective dates.
Separate the home’s loads
| Part of consumption | What to model |
|---|---|
| EV charging | Energy needed and the charging periods you can actually use |
| Normal household demand | Imports that remain outside cheaper periods |
| Battery charging | Input energy including losses and the permitted charging window |
| Solar exports | Energy available in each relevant export period |
| Standing charges | The daily charge for the full year |
A tariff that improves EV charging can still increase the cost of other imports. An attractive peak export rate only applies to energy you can export in that period.
Use weighted rates carefully
Suppose 40% of imported energy costs 10p and 60% costs 30p. The weighted import rate is 22p, not the simple average of 20p and not the cheapest rate of 10p. Those fictional rates illustrate the method, not either Octopus product.
Calculate an export-weighted rate separately. A battery strategy may change the imported and exported volumes as well as their timing, so a full comparison may need separate profiles for each offer.
Choose using your household evidence
Ask for your half-hourly consumption and export data if it is available. Test a winter and summer period, include charging losses and keep any backup reserve intact. Check what happens when the car is away or the battery cannot follow the planned schedule.
The whole-bill tool provides a first comparison using weighted rates and fixed annual volumes. It is not a half-hourly tariff simulator. For a battery purchase, use the battery tool separately so you do not attribute all tariff savings to the hardware.
Published information supports your research. Your installer should confirm the exact product, suitability, scope and terms for your property.
Suggest a correction ↗Your next useful step
Put the information to work.
Take the questions that matter to your project, explore the numbers and decide what to ask next.