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- Generates 100% renewable electricity
- Reasonable value for money
- Above-average complaint numbers
- Not among the best at complaint handling
- Its website isn’t among the easiest to use
Glasgow-based Scottish Power was created in 1990 and has been owned by Spanish energy firm Iberdrola since 2006. It offers a green tariff that supplies homes with 100% renewable electricity, and it’s also a generator, solely producing renewable energy via its UK wind farms.
In addition to energy, it offers boiler and heating maintenance and support plans, appliance care plans and home emergency cover. Its partnership with Cancer Research UK has seen it raise more than £40 million for the charity to date.
Scottish Power had been investing in the production of green hydrogen – an alternative to fossil fuels made using renewable electricity – to create a clean source of energy for vehicles, but has now halted its projects due to “challenging conditions”.
The supplier, which is one of Britain’s largest, was in the middle of the rankings for many categories of our Expert Reviews Energy Awards 2025 and didn’t win any awards. In our survey, 24% of its customers said they would be extremely likely to recommend it to others. The winner in this category, Octopus Energy, achieved a much higher percentage of 53%.
To find out how to get the best energy deal for you, visit our guide to the best energy suppliers.
What kind of tariffs does Scottish Power offer?
Scottish Power offers two fixed tariffs – one that helps support Cancer Research UK and one with 100% green electricity. It also has a tariff that tracks the price cap and is cheaper than its standard tariff.
It also offers an EV tariff that provides cheaper electricity at night and a heat pump tariff that allows you to power your heat pump at a lower rate during off-peak daytime hours.
Does Scottish Power offer good value for money?
Scottish Power customers weren’t wowed by its value for money – it was in fourth place for this. Here, 19% of customers reported being very satisfied. This was just under half of the percentage received by Utility Warehouse. There were poorer suppliers in this category, though. The worst, E.ON Next, had just 14% of customers saying they were very satisfied.
It was also in fourth place for customer trust, with 21% of customers saying they completely trusted it to act in their best interests. The top performers in this category, British Gas and Octopus Energy, had 30% of customers saying so.
How good is Scottish Power at handling complaints?
Scottish Power was near the bottom in terms of how well it handles customer complaints, with 30% of customers saying they were very satisfied. By comparison, the top supplier, Utility Warehouse, had 49% who were very satisfied.
Scottish Power had an above-average number of complaints, according to the most recent data from the energy regulator Ofgem for the second quarter of 2025. It received 1,499 per 100,000 customer accounts; the industry average was 1,052. Octopus Energy received the least with 561.
For resolving complaints, Scottish Power wasn’t too bad compared to the other suppliers in our survey. It resolved 62% of them by the end of the next working day and 88% within eight weeks. The quickest supplier at resolving them, Utility Warehouse, managed to address 83% and 100% of complaints within these timeframes.
Ofgem complaints data
| Complaints per 100,000 customer accounts | Industry average complaints per 100,000 customer accounts | Complaints resolved by end of next working day | Complaints resolved within eight weeks |
| 1,499 | 1,052 | 62% | 88% |
Notes: Data is for the second quarter of 2025.
How clear are Scottish Power’s bills?
Scottish Power was at the lower end of the scale for the clarity of its bills, as 68% strongly agreed or agreed that their bills were clear and easy to understand. This compares to 79% for the award-winning Utility Warehouse and 81% for Octopus. The bottom supplier in this category – EDF Energy – only had 63% of customers saying this.
How easy to use are Scottish Power’s website and app?
Scottish Power had one of the lowest ratings for how easy its website is to use, with 30% saying they found it very easy compared with 49% for the top provider, Utility Warehouse. It was rated slightly better for its app, coming fifth overall, with 33% saying it was very easy to use, versus around half for the award winners Utility Warehouse and Octopus.
Should I choose Scottish Power?
Scottish Power is an important player in renewable electricity generation and supplies 100% renewable electricity to homes on its green tariff. It performed reasonably well for value for money and customer trust.
However, its performance across the majority of our award categories was below average, and it was a long way behind the top two suppliers, Octopus Energy and Utility Warehouse, overall.
