Octopus Energy vs Scottish Power

Scottish Power is no longer just a standard-tariff comparison. Its current EV and heat-pump offers mean the useful question is not whether it has a clever tariff at all, but whether the product shape fits your home. Scottish Power still is not as flexible as Octopus, but its current offers are more nuanced than a basic overnight-rate row makes them look.

That matters because Scottish Power is now offering two quite different EV paths. EV Saver is the simpler one, a classic time-of-use tariff with an overnight off-peak window. EV Optimise is the more interesting one. It is not a cheap-rate tariff in the usual sense. You stay on a normal Scottish Power tariff, smart charging is scheduled through the app and the difference between your standard unit rate and the advertised smart-charging rate is credited back later on your bill.

The latest support wording makes that credit model worth spelling out. EV Optimise works only for home charging, currently supports one vehicle per account and asks you to avoid conflicting vehicle or third-party charging schedules. Scottish Power also says smart charging will not happen during the 4pm to 8pm peak period. Those details do not make the product poor, but they do mean the cheapest-looking number is only part of the decision.

Pricing

If you are only comparing standard or fixed tariffs, Scottish Power may be more credible than older comparison pages implied. Its fixed deals can be worth checking, especially if you want a mainstream supplier and are comfortable locking in for a while. That said, Octopus still tends to become more interesting once you look beyond today's quote and think about what else your home might need next.

That is the recurring pattern across these supplier pages. The flat-rate difference may be modest. The wider difference comes from what each supplier lets you do afterwards. Octopus usually offers more realistic next steps if you later want a better EV tariff, export payments, solar compatibility or a more experimental smart-tariff setup.

Scottish Power's EV offers are not all the same product

This is the part most likely to trip people up. Scottish Power now has two genuinely different EV models, so the first useful question is which product shape you are actually comparing before you look at the headline pence-per-kWh number.

That later-credit model is not automatically bad, but it does make the product harder to reason about. It also means Scottish Power can create the same kind of app-versus-bill confusion that already shows up in other smart-energy products. The credit is calculated after your normal unit rate and Scottish Power says VAT is calculated on the original electricity charge before that credit is applied. If a customer wants the simplest possible answer to "what rate am I paying?", Octopus Go and Intelligent Go remain cleaner products to compare.

Eligibility and trust are the real caveats

Scottish Power's eligibility notes make EV Optimise less universal than the headline suggests. The current rules point towards a live Scottish Power electricity account, a communicating smart meter sharing half-hourly readings, a single-rate tariff and meter rather than Economy 7, credit payment, a compatible car and a home charger. It is also not available on Scottish Power's own time-of-use tariffs such as EV Saver, Solar Saver and Heat Saver.

That does not make the product weak, but it does mean the good headline rate hides a fair amount of setup logic. If your household is simple, one EV, one charger and an ordinary single-rate tariff, it may fit well. If your home is already a bit more complicated, Octopus usually gives you more room to compare EV, solar, battery and export decisions without treating them as separate product silos. Scottish Power says EV Optimise can work with solar panels or home batteries, but its algorithm does not currently account for self-generated or stored electricity when calculating smart-charging schedules and credits.

The other caveat is trust and support. Scottish Power's Trustpilot score now looks healthier than many people expect, sitting around 4.3 with a very large review base. Yet Which?'s January 2026 customer survey still placed it at the bottom of the table with poor scores across service measures. That mismatch does not prove one source is wrong, but it is a reminder that a decent public review profile does not automatically mean a smoother experience once billing or meter data gets messy.

Green and heating credentials

Scottish Power still has a genuine renewables story through Iberdrola and its own UK wind generation. This page should not pretend otherwise. If you mainly care about backing a large supplier with a serious generation portfolio, Scottish Power has a credible answer.

Where Octopus still feels stronger is in how the low-carbon story joins up across the whole household. Octopus is not only selling renewable electricity. It also offers better continuity across EV tariffs, export tariffs, solar, batteries and heat pumps. Scottish Power can cover parts of that world, but the product line still feels more segmented and more conditional.

The heat-pump comparison is a good example. Scottish Power Heat Pump Saver currently offers a daytime off-peak window between 11am and 4pm and says that cheaper window applies to all household electricity use, not only the heat pump. That may suit homes that can heat water, pre-warm rooms or run appliances in the middle of the day. Cosy Octopus is a different shape, with multiple cheaper periods and a more obvious late-evening slot, so the better choice depends on the rhythm of the home rather than the headline rate alone.

Where Scottish Power has genuine strengths

A plausible EV option for the right driver. This is not just a dusty big-supplier page any more. EV Saver and EV Optimise both give Scottish Power a real place in the EV comparison rather than a token presence.

Mainstream familiarity with a stronger public review profile than its reputation suggests. Plenty of households still want a large established supplier, and Scottish Power's current Trustpilot picture is better than the usual stereotype.

Serious renewable generation backing. If supplier ownership of actual renewable assets matters to you, Scottish Power can make a respectable case.

The verdict

Choose Scottish Power if the live quote is strong and its specialist product genuinely matches your home. In practice that may mean one EV, one charger, a straightforward meter setup and a willingness to use app-led charging without getting frustrated by later bill credits. For heat-pump homes, it means being able to shift enough use into the 11am to 4pm cheaper period to make the tariff worthwhile.

Choose Octopus if you want clearer tariff logic, better flexibility and fewer reasons to second-guess how the billing model works. The more you value whole-home tariff clarity, future options and a smoother path into a more complex setup, the more likely Octopus is to be the better long-term choice.

Octopus Energy rates update automatically. Other supplier rates and public charging costs were correct as of May 2026 and may have changed.