How many customers does Ovo Energy have?

Ovo Energy has approximately 4 million customers in England, Scotland and Wales, making it one of the UK's largest energy suppliers. It grew significantly after acquiring SSE Energy Services' domestic customers in January 2020 and additional customers from failed supplier Bulb. It is currently the fourth-largest supplier. Around 12% of UK households receive their electricity from Ovo and 11% their gas.

What is Ovo Energy's customer satisfaction rating?

Ovo Energy's customer satisfaction is among the lowest of major UK suppliers. Which? energy survey (September-October 2025, 11,945 respondents): 60% overall score — the lowest of any supplier surveyed, joint with Scottish Power. Poor 2-star ratings across every category: overall customer service, customer communications, and value for money. Expert Reviews Energy Awards 2025: bottom for complaint handling satisfaction (13% very satisfied). Trustpilot: 4.6/5 from 258,000+ reviews — a contrast suggesting straightforward queries are handled well but complex complaints are not.

Ovo Energy Review UK 2026: 4M Customers, Worst Which? Rating

Q: Is Ovo Energy any good?

Ovo Energy receives very mixed reviews in 2026. On the positive side: Trustpilot 4.6/5 from 258,000+ reviews; resolves complaints fairly quickly (74% by next working day); offers good sustainability credentials. On the negative side: Which? gave Ovo its lowest customer score of any major supplier at 60% (joint lowest with Scottish Power); Expert Reviews ranked it bottom for complaint handling satisfaction (only 13% very satisfied vs 31% for Octopus); 1,510 complaints per 100,000 accounts (second highest among large suppliers per Ofgem data). The Trustpilot score and the Which?/Ofgem complaint data paint very different pictures.

Q: Should I switch from Ovo Energy?

For most customers, switching from Ovo Energy to Octopus Energy or another competitive supplier is likely to improve both price and customer service. The switching process is risk-free (your energy supply is never interrupted), takes 5-10 minutes on Uswitch, and typically takes effect within 2-3 weeks. If you are on a fixed-rate deal with Ovo, check your exit fee before switching — it may be worth waiting until your deal ends if the exit fee exceeds the potential savings.

Ovo Energy Review UK 2026: Is It Worth It? Honest Verdict

Chandraketu Tripathi

Finance Editor, Kaeltripton

Published 4 Apr 2026

Last reviewed 9 May 2026

✓ Fact-checked

Part of: Best Energy Suppliers UK 2026

Ovo Energy became one of the UK's largest suppliers almost overnight — but size has not translated to quality in every area. Here's the complete 2026 review. Updated April 2026

Ovo Energy at a Glance — 2026

Metric	Ovo Energy	Best in Market	Source
Customers	~4 million (4th largest)	British Gas ~12M	Company / Ofgem data
SVT (typical household)	£1,641/year (price cap)	Octopus fixed ~£1,480-£1,620	Ofgem Q2 2026
Trustpilot	4.6/5 from 258,000+ reviews	Octopus 4.8/5	Trustpilot April 2026
Which? overall score	60% — joint lowest	Octopus (highest)	Which? Oct 2025
Which? rating (all categories)	2 stars (poor)	Octopus 5 stars	Which? Oct 2025
Complaint volume	1,510/100,000 — second highest	Best ~200-300/100,000	Ofgem Q2 2025
Complaint resolution (next day)	74% — above average	British Gas 48%; best ~90%+	Ofgem data
Complaint handling satisfaction	13% very satisfied — bottom	Octopus 31%	Expert Reviews Energy Awards 2025
Green electricity option	Yes — Greener Electricity (+£8/month)	Octopus 100% standard	Ovo tariff information
EV tariff	Charge Anytime — cheaper any time	Octopus Intelligent	Ovo tariff information

The Trustpilot vs Which? Problem

Ovo's Trustpilot score of 4.6/5 from 258,000+ reviews is genuinely high — and this represents real positive customer interactions. The conflict with the Which? 60% score (lowest of any major supplier) can be explained: Trustpilot captures customers who voluntarily write reviews, often after a positive interaction or successful resolution. The Which? survey captures a representative sample of energy customers including those who haven't had cause to contact their supplier, giving a broader picture of overall satisfaction. Expert Reviews and Ofgem complaint data (1,510 complaints per 100,000 accounts) tend to align with the Which? view. The pattern suggests Ovo handles simple routine queries well but struggles significantly with complex complaints and billing disputes.

Ovo Tariffs — April 2026

Tariff	Type	Best For	Notes
Standard Variable Tariff	Variable — at price cap	Maximum flexibility	Tracks Ofgem cap quarterly; no exit fee
1-year fixed	Fixed	Budget certainty for 12 months	Exit fees apply
2-year fixed	Fixed	Longer price certainty	Exit fees apply
Greener Electricity upgrade	Add-on (+£8/month)	Environmental credentials	100% renewable; contributes to new UK generation
Charge Anytime EV	Time of use	EV owners	Cheaper EV charging at any time (not just overnight)

Who Might Still Choose Ovo Energy?

Despite its poor Which? ratings, some customers may prefer Ovo if: you have had a good personal experience with Ovo's customer service and are on a competitive fixed deal; you value its sustainability initiatives (£40/year per Greener Electricity customer contributed to new UK renewable generators); or you specifically want the Charge Anytime EV tariff which allows cheap charging at any time of day rather than only overnight. However, Octopus Energy offers comparable or better options in all of these categories in 2026.

KAELTRIPTON VERDICT

Ovo Energy's Which? score of 60% (joint lowest in market) and 1,510 complaints per 100,000 accounts (second highest) tell a clear story about complex complaint handling. For most customers, switching to Octopus Energy is likely to improve both price and service. The Trustpilot 4.6/5 suggests routine interactions are handled fine — but when things go wrong, Ovo consistently underperforms. If switching: check your exit fee first. If not on a fixed deal, there's no cost to leaving.

Which? Joint Lowest 60% — Switch to Octopus Likely Better

Q: Is Ovo Energy any good?

A: Trustpilot 4.6/5 (positive for routine queries). Which? 60% score — joint lowest of all major suppliers. 1,510 complaints/100,000 accounts — second highest. Mixed overall.

Q: Should I switch from Ovo Energy?

A: Yes for most customers — Octopus offers cheaper tariffs and significantly higher customer satisfaction (Which? survey). Check exit fees if on a fixed deal. Switching is free and risk-free.

Q: What is Ovo Energy's Trustpilot rating?

A: 4.6/5 from 258,000+ reviews. High Trustpilot but conflicts with Which? and Ofgem complaint data — routine queries handled well but complex complaints poorly.

Q: How many customers does Ovo have?

A: ~4 million, making it UK's 4th largest supplier. Grew after acquiring SSE Energy Services customers in 2020.

This article is for informational purposes only. Energy prices change frequently — always compare on Uswitch or MoneySavingExpert for your current best deal. Figures verified April 2026 from Ofgem, Which?, Citizens Advice and Trustpilot.

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