OVO Energy vs Sainsbury’s Energy

Overall Winner: OVO Energy

OVO Energy is the stronger all-round choice for households that value established customer-service data, a highly rated app and a stronger Trustpilot presence, while Sainsbury’s Energy is better for customers wanting a cheaper fixed deal and higher Which? satisfaction scores.

Sainsbury’s Energy and OVO Energy have effectively identical standard variable pricing at around £1,805 a year on the comparison assumptions. Sainsbury’s Energy, however, offers the cheaper fixed option, while OVO has considerably more published app and Citizens Advice data to assess its service.

OVO Energy vs Sainsbury’s Energy at a Glance

If you only want a quick answer on which supplier comes out ahead, the verdict above gives you the result. But if you want to see what drives that result and whether it matches your priorities, the comparison below looks at the key differences in more detail. 

Tariffs and Pricing

Both suppliers price their standard variable tariffs identically, but their fixed deals differ on cost, term length and exit fees.

OVO Energy

• Cheapest variable tariff: Simpler Energy — £1,805/year, no fixed term, no exit fee — best for maximum flexibility
• Fixed option: 1 Year Fixed + Boiler Cover (22 July 2026) — £1,923/year, 12-month term, £100 exit fee — best for price certainty

Sainsbury’s Energy

• Cheapest variable tariff: Sainsbury’s Standard Variable — £1,805/year, no fixed term, no exit fee — best for maximum flexibility
• Fixed option: Fix and Reward Fixed 24m (v51) — £1,841/year, 24-month term, £200 exit fee — best for price certainty

Feature verdict:
Variable pricing is tied at £1,805/year. On fixed deals, Sainsbury’s Energy is cheaper (£1,841 vs £1,923), but its 24-month term and £200 exit fee lock you in for twice as long at double the penalty. Ofgem’s price cap drops to £1,723/year from October 2026, so variable rates are likely to fall — worth factoring in before choosing a fixed deal.

Pricing based on East Midlands, average 3-bed detached home, monthly direct debit, dual fuel.

Tariff Options

OVO Energy offers six tariffs covering variable, fixed, green and EV/solar needs, while Sainsbury’s Energy offers five, with a stronger focus on rewards and tracker pricing.

OVO Energy

• Simpler Energy — standard variable, no fixed term — best for flexibility
• 1 Year Fixed — 12-month fixed — best for price certainty
• 1 Year Fixed + Boiler Cover — 12-month fixed with boiler cover — best for heating protection
• 1 Year Fixed + Greener Electricity — 12-month fixed with green add-on — best for supporting UK renewables
• Charge Anytime — EV charging add-on (smart meter required) — best for EV drivers
• Smart Export Guarantee (SEG) — solar export tariff — best for homes generating their own electricity

Sainsbury’s Energy

• Sainsbury’s Standard Variable — no fixed end date — best for flexibility
• Track & Reward 12m — tracker tariff following Ofgem’s price cap, with rewards — best for those wanting cap-linked pricing
• Fix and Save 12m — 12-month fixed — best for price certainty
• Fix and Reward Fixed 24m — 24-month fixed with bonus Nectar points — best for long-term certainty plus shopping rewards
• EV tariff — 12-month fixed with a cheaper 6-hour off-peak rate — best for EV drivers

Feature verdict:
OVO Energy gives more choice overall, with six tariffs against Sainsbury’s five, plus its own solar export option — something Sainsbury’s Energy doesn’t currently offer. Sainsbury’s, however, is the stronger pick if rewards matter: its Track & Reward and Fix & Reward tariffs combine pricing with Nectar points, a benefit OVO’s range doesn’t include. EV drivers are covered by both suppliers, so that choice comes down to rate structure rather than availability.

Customer Reviews

Both suppliers score well on Trustpilot, but diverge sharply once you look at the independent Which? survey and how each handles negative feedback.

OVO Energy

• Trustpilot: 4.7/5 from 293,863 reviews — 77% five-star
• Replies to 99% of negative reviews
• Which? score: 61% — scores 2/5 on both customer service and ease of contact; 9/10 on help for those who need it
• Citizens Advice: ranked #8, score 3.3/5
• Common feedback: praised for polite staff and quick resolutions; some complaints about long wait times and being transferred multiple times

Sainsbury’s Energy

• Trustpilot: 4.3/5 from 3,127 reviews — 80% five-star
• Replies to only 35% of negative reviews
• Which? score: 71% — scores 4/5 on both customer service and ease of contact; 10/10 on help for those who need it
• Citizens Advice: not currently listed
• Common feedback: praised for knowledgeable staff, fast responses and WhatsApp support; some complaints about incorrect billing estimates

Feature verdict:
Sainsbury’s Energy has the stronger satisfaction scores where it’s measured — a higher Which? score (71% vs 61%), better five-star share, and higher customer-service/ease-of-contact ratings. OVO Energy, however, has a far higher reply rate to negative reviews (99% vs 35%) and a larger, independently ranked Citizens Advice presence, giving it more transparent, verifiable service data overall. If satisfaction on paper matters most, Sainsbury’s edges ahead; if you want a supplier that’s more accountable when things go wrong, OVO does too.

App Ratings & Features

OVO Energy has a fully rated, actively used mobile app — Sainsbury’s Energy currently has no published app store presence to compare it against.

OVO Energy

• App Store (iOS): 4.6/5 from 18,000 reviews
• Google Play (Android): 3.0/5 from 10,621 reviews, over 1,000,000 installs
• Main features: usage and payment tracking, tariff details, account management
• Feedback: praised for detailed usage/payment info; some users report loading issues and unclear tariff details on certain devices

Sainsbury’s Energy

• No standalone app listed on the App Store or Google Play at the time of writing
• Account management is handled through an online web portal rather than a dedicated app
• Customer communication includes WhatsApp support (noted in the Customer Reviews section), which OVO’s app-based model doesn’t currently offer

Feature verdict:
OVO Energy is the clear winner on app experience — it’s the only one of the two with a rated, downloadable app, giving customers usage tracking and account management on the go. Sainsbury’s Energy’s lack of an app is a genuine gap, not just missing data: customers manage their account online instead, and rely on WhatsApp for support rather than in-app tools. If managing your energy account from your phone matters to you, OVO Energy is the stronger choice.

Customer Service & Support

OVO Energy publishes detailed, independently verified service data through Citizens Advice — Sainsbury’s Energy currently has none, despite being supplied by E.ON Next.

OVO Energy

• Citizens Advice: ranked #8, score 3.3/5
• Email response: 98.5% answered within 2 days
• Average call wait: 1 min 33 sec
• Opening hours: Phone — weekdays 9am–5pm (closed weekends); Email — 24/7; Social media — business hours
• Vulnerability commitments formally registered with Citizens Advice

Sainsbury’s Energy

• No standalone Citizens Advice data, ranking or score published
• Supplied and supported by E.ON Next, but no independently verified response times, call wait data, or opening hours are available for the Sainsbury’s-branded service

Feature verdict:
OVO Energy is the only one of the two with independently verified service data — a fast average call wait, a near-total email response rate, and formal vulnerability commitments on record. Sainsbury’s Energy’s absence from Citizens Advice isn’t necessarily a sign of worse service — it’s supplied by E.ON Next, an established provider — but without published figures, customers have no independent way to check response times or service quality before switching. If verified support data matters to your decision, OVO Energy is the safer bet on paper.

Complaints & Performance

Sainsbury’s Energy receives far fewer complaints than OVO Energy, but OVO’s fuller Citizens Advice data gives a more complete, independently verified picture.

OVO Energy

• Complaints: 1,725 per 100k customers (Q1 2026)
• Citizens Advice: 39.5 per 10k customers
• Resolved same/next day: 67%
• Resolved within 8 weeks: 92%
• Complaint themes: customer service, payment issues, smart/general billing and meter reading, debt-related disconnections

Sainsbury’s Energy

• Complaints: 659.62 per 100k customers (Q1 2026)
• Citizens Advice: not published
• Resolved same/next day: 57%
• Resolved within 8 weeks: 90%
• Complaint themes: not broken down by category, but overall performance figures are published directly by the supplier

Feature verdict:
Sainsbury’s Energy receives roughly a third of the complaints OVO Energy does per 100k customers, and that’s a genuine point in its favour. But OVO Energy resolves complaints faster — 67% same/next day versus 57%, and 92% within 8 weeks versus 90% — and it publishes a full breakdown of why customers complain, which Sainsbury’s doesn’t. If low complaint volume matters most, Sainsbury’s Energy wins; if you want to see resolution speed and root-cause transparency, OVO Energy gives you more to go on.

Green Energy Comparison

Both suppliers report a fuel mix that’s still majority non-renewable, but their approach to green energy — and transparency around it — differs.

OVO Energy

• Renewable: 11% | Nuclear: 9% | Fossil fuel: 74% | Other: 6% (Jan–Mar 2026, Citizens Advice data)
• Runs Plan Zero, targeting net zero by 2035
• Buys electricity directly from UK renewable generators via long-term contracts (no longer uses renewable certificates as of 2023)
• Optional Greener Electricity add-on (£8/month), with £40/year per subscription supporting independent UK renewable generators
• Has planted 5 million trees in the UK since 2015

Sainsbury’s Energy

• Supplied by E.ON Next, so shares its fuel mix — reported as majority natural gas, with a significant share of renewable energy, and some coal, nuclear and other sources (Apr 2024–Mar 2025 figures)
• No dedicated green tariff add-on like OVO’s Greener Electricity
• Offers discounts on home-energy upgrades — solar panels, home batteries, EV chargers

Feature verdict:
OVO Energy is more transparent and more current — its fuel mix is independently sourced from Citizens Advice for early 2026, while Sainsbury’s Energy’s figures come from E.ON Next and cover an older period (April 2024–March 2025). OVO also offers a direct way to pay extra for greener electricity, which Sainsbury’s doesn’t. Sainsbury’s Energy’s edge is practical rather than green: discounts on solar panels, batteries and EV chargers help customers cut their own footprint, even without a green tariff option. If verified, recent renewable data matters most, OVO Energy leads; if you want help funding your own green upgrades, Sainsbury’s Energy has the edge.

Rewards, Benefits & Extra Features

Beyond pricing, both suppliers offer loyalty perks and extras that can add real value — OVO Energy focuses on lifestyle rewards and energy-shifting incentives, while Sainsbury’s Energy ties everything back to its Nectar points ecosystem.

OVO Energy

• OVO Beyond — loyalty scheme offering perks like free electric vehicle miles and event tickets
• Power Move — rewards customers for shifting energy use away from peak times
• EV benefits — Charge Anytime add-on for customers with a compatible EV, charger and smart meter
• Solar/SEG — Smart Export Guarantee pays customers who generate their own electricity via solar panels and battery storage bought through OVO
• Won Best Value for Money at the 2025 Uswitch Energy Awards

Sainsbury’s Energy

• Nectar points — earned on certain fixed tariffs, including bonus points via the Fix and Reward Fixed 24m tariff
• Shopping rewards — up to triple Nectar points on regular Sainsbury’s shopping
• Home-energy upgrade discounts — money off solar panels, home batteries and EV chargers
• Named Which? Recommended Provider for 2026

Feature verdict:
This is where the two suppliers genuinely diverge in approach. OVO Energy rewards customers for how they use energy — shifting usage, going solar, driving an EV — with tangible extras like free EV miles and event tickets. Sainsbury’s Energy rewards customers for staying loyal, linking energy spending directly to Nectar points and supermarket shopping — a real advantage if you already shop there regularly. Neither is objectively better; it depends on whether you’d rather earn perks tied to energy behaviour (OVO) or everyday shopping (Sainsbury’s).

Which Supplier Is Better for Different Households?

Every household prioritises something different — price, service, rewards or sustainability. Here’s a quick breakdown based on what matters most to you.

A closer look:

• Budget-conscious households wanting flexibility get identical pricing either way — but if you want to lock in a fixed rate, Sainsbury’s Energy is currently cheaper.
• Tech-savvy households who want to manage energy from their phone should lean towards OVO Energy, which has the only rated app between the two.
• Loyal Sainsbury’s shoppers get real added value from Nectar points and shopping rewards that OVO Energy simply doesn’t offer.
• Solar or EV-heavy households benefit most from OVO Energy’s Smart Export Guarantee, though EV tariffs themselves are competitive on both sides.
• Households prioritising transparency — verified service data, recent fuel-mix figures, formal vulnerability commitments — get more of that from OVO Energy.

Pros and Cons

OVO Energy
Pros

• Only supplier with rated, downloadable apps (iOS 4.6, Android 3.0)
• Full Citizens Advice data — ranked #8, 3.3/5
• 98.5% of emails answered within 2 days; average call wait under 2 minutes
• More tariff choice, including solar export (SEG)

Cons

• Lower Which? score (61% vs 71%)
• More expensive fixed tariff (£1,923 vs £1,841)
• No loyalty/shopping rewards ecosystem

Sainsbury’s Energy
Pros

• Cheaper fixed tariff, and fewer complaints per 100k customers
• Higher Which? score and stronger customer-service ratings
• Nectar points and shopping rewards on top of energy pricing

Cons

• No published app, and no standalone Citizens Advice data
• Replies to far fewer negative Trustpilot reviews (35% vs OVO’s 99%)
• Fixed deal requires a longer 24-month commitment with a higher exit fee

Our Verdict

Overall Winner: OVO Energy

OVO Energy is the stronger all-round choice, backed by independently verified service data, a rated app, and faster response times. Sainsbury’s Energy remains the better pick if a cheaper fixed deal, higher customer satisfaction, or Nectar rewards matter more to you.

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