Who Are Corona Energy? | UK Business Energy Supplier Guide
Last verified: March 2026 | Report outdated information
On This Page
- About Corona Energy
- The Corona Energy Checklist
- Security
- Transparency
- Convenience
- Services
- Environmental
- Sector Fit Assessment
- Telnergy’s Take
- Is Corona Energy Right For You?
- Get in Touch
About Corona Energy
Corona Energy is one of the UK’s longest-established independent business energy specialists, supplying gas and electricity exclusively to non-domestic customers since 1995. Headquartered in Watford, Hertfordshire, Corona serves approximately 17,000 business customers and manages over 85,000 metres nationwide — a scale that places it firmly in the mid-market between the Big Six and smaller challenger suppliers.
Unlike most household-name energy companies that serve both domestic and commercial markets, Corona Energy has always focused solely on business customers — from microbusinesses and SMEs through to industrial and commercial (I&C) accounts. This B2B-only model shapes the company’s entire service structure: dedicated account managers, commercially oriented billing systems, and a culture built around business energy procurement rather than consumer retail.
Corona is particularly well known in the broker and intermediary community for the quality of its account management and the availability of its SME Fully Fixed product — one of only a handful of mainstream offerings in the UK market that genuinely fixes all charges, including network pass-throughs, for the full contract term.
The company supplies approximately 14% of the UK industrial and commercial gas market, reflecting its strength in the larger-account segment despite its independent, non-Big Six status. With over 200 customer service professionals on its team, Corona maintains a service model that sits closer to a specialist consultancy than a volume retail supplier.
Quick Facts
| Detail | Information |
|---|---|
| Founded | 1995 |
| Headquarters | Watford, Hertfordshire |
| Customer Base | ~17,000 non-domestic customers; 85,000+ metres |
| Business Type | B2B only (SME and I&C) |
| Parent Company | Independent |
| I&C Gas Market Share | ~14% |
| Contact | Via website: coronaenergy.co.uk |
| Trustpilot Rating | 4.4–4.5/5 (~2,310 verified business reviews) |
The Corona Energy Checklist
Security
Are their prices fully fixed?
This is where Corona Energy genuinely stands out. Unlike most suppliers — including all of the Big Six — Corona offers two distinct product types with fundamentally different approaches to price fixing:
SME Fully Fixed: Fixes all elements of the contract price, including commodity costs, transportation charges, metering, FIT, and RO (for electricity). This is a market-leading position. When you agree a price with Corona on the Fully Fixed product, that price is guaranteed to remain unchanged for the full contract term, regardless of movements in network charges or industry levies. The only exclusion is CFD (Contracts for Difference), which is charged on top regardless of product, and standard VAT and CCL.
SME Fixed: Fixes commodity (wholesale energy) costs only. Transportation, metering, FIT, and RO charges remain variable and can change throughout the contract term — consistent with standard industry practice.
This two-tier structure requires careful attention at the quoting stage. Both products are described as “fixed” but they deliver materially different levels of price certainty. Always confirm which product underpins a Corona quote before signing.
| Charge Type | SME Fully Fixed | SME Fixed |
|---|---|---|
| Commodity costs | ✓ Fixed | ✓ Fixed |
| Transportation (DUoS/TNUoS) | ✓ Fixed | ✗ Variable |
| Metering | ✓ Fixed | ✗ Variable |
| FIT (electricity) | ✓ Fixed | ✗ Variable |
| RO (electricity) | ✓ Fixed | ✗ Variable |
| CFD (electricity) | ✗ Excluded (both products) | ✗ Excluded |
| VAT | Excluded (standard) | Excluded (standard) |
| CCL | Excluded (standard) | Excluded (standard) |
Back-billing policy
Corona Energy is an Energy UK member, adhering to the Back Billing Principle limiting retrospective billing to 12 months for meter reading corrections or estimated billing adjustments. This provides important protection against unexpected historical charges — particularly relevant given some Trustpilot reviews referencing billing adjustments following metre changes.
Credit requirements
As a business-only supplier, Corona Energy carries out credit assessments for new customers. Terms offered — including contract length, payment method, and whether a security deposit is required — are determined by the outcome of this assessment. Businesses with strong credit histories are typically offered standard terms with Direct Debit payment.
Transparency
What is the termination process?
For non-microbusinesses: 30 days’ written notice required before your contract end date. Corona Energy contacts customers when they have 60 days remaining on their contract with renewal options, which is a longer lead time than many suppliers and provides good forward planning opportunity.
For microbusinesses (fewer than 10 employees, turnover under £1.7m, consuming under 100,000 kWh electricity annually): No advance notice is required to end fixed-term contracts under the 2021 Ofgem microbusiness protections. Exception: evergreen or rollover tariffs require 30 days’ notice.
Termination submission: Via written notice to Corona Energy. All outstanding balances must be settled before switching supplier.
What happens at contract end?
Corona Energy sends renewal notifications at the 60-day mark before contract expiry — earlier than the 30-day minimum required by Ofgem, giving businesses more time to compare the market and make an informed decision. Businesses that do not renew or switch are placed on Corona’s out-of-contract variable rates, which — as with all suppliers — are significantly higher than fixed-term tariffs and can change at any time.
From October 2024, DUoS and TNUoS fixed charges are passed through separately on out-of-contract rates, adding further cost layers beyond the headline unit rate. Businesses approaching contract end should prioritise timely renewal or switching.
Is there a rollover period?
No automatic rollover into a new fixed term. Businesses not renewing are placed on out-of-contract variable rates until a new agreement is reached or they switch.
What about early exit fees?
Early termination fees apply and are specified in your Contract Confirmation Letter. Corona’s contracts are standard fixed-term agreements — once signed, businesses are committed to the minimum supply period. Corona Energy reserves the right to amend contract terms in specific circumstances, including changes in law, customer failure to fulfil obligations, or gas customers failing to use their stated consumption.
💬 Questions about Corona Energy contracts? Our team can explain the SME Fully Fixed vs SME Fixed distinction and benchmark Corona’s offer against the market. Call: 01202 028888 | WhatsApp: 07360 272168 | Email: hello@telnergy.com
Convenience
Payment options
- Monthly Direct Debit (standard for all accounts)
Corona Energy bills are paid by Direct Debit as standard across all tariff types. Businesses requiring alternative payment arrangements should raise this at the quotation stage.
Online account management
Corona Energy provides an online account portal offering bill history, usage insights, and contract management tools with straightforward navigation. Customers can access consumption data and reporting, which is particularly useful for businesses with energy management or sustainability reporting requirements. Webchat support is available through the online platform.
The portal is functional rather than feature-rich — appropriate for a supplier whose value proposition centres on account management relationships rather than self-service technology. Businesses wanting a highly sophisticated digital experience comparable to Octopus Energy’s platform may find it less polished.
Customer service standards
Corona Energy’s service model is built around dedicated account managers rather than generic call centre support. Business customers are assigned named account contacts for renewals, billing queries, and ongoing support. This relationship-led approach distinguishes Corona from volume retail suppliers and is consistently praised in Trustpilot reviews — with reviewers frequently naming individual account managers who delivered efficient, knowledgeable assistance.
Webchat is available as an additional contact channel. Standard customer service hours apply; 24/7 support is available for I&C accounts via a dedicated corporate team.
Trustpilot reviews from verified business customers score Corona at 4.4–4.5/5. Positive themes include smooth onboarding, responsive named contacts, and clear billing on fixed contracts. Negative themes — present in a minority of reviews — include delays resolving billing adjustments following metre changes, and occasional slow escalation response times during peak periods. These are not unusual for an independent specialist supplier and the overall satisfaction level is significantly above the industry average.
VAT declarations
Businesses eligible for reduced VAT rates — including charities and residential care facilities — can submit declarations to Corona Energy with supporting documentation. CCL exemption for qualifying organisations is also available.
Services
Smart metres
Corona Energy supports both AMR (Automated Meter Reading) metres and SMETS2 smart metres. AMR metres — which provide half-hourly data via one-way communication — are recommended for larger enterprise accounts where the scale of data reduces risk of reporting errors. Smart metres, with two-way communication, are better suited to SMEs, enabling greater usage visibility and control. Corona’s team can advise on the appropriate metre type for a given account profile.
I&C and large account services
Corona’s corporate team serves large business accounts and multi-site portfolios with 24/7 availability. For businesses with complex energy estates, multi-site supply, or high consumption profiles, Corona’s I&C expertise — backed by a 14% share of the UK industrial and commercial gas market — is a material advantage. The company’s long independent history in this segment means it understands the procurement requirements and risk management priorities of larger energy users.
Public sector supply
Corona Energy has a specialist public sector team and established relationships with public sector organisations. The company understands the procurement frameworks, contract requirements, and stakeholder reporting obligations specific to public sector energy supply — making it a credible option for local authorities, NHS trusts, and educational institutions operating under procurement frameworks.
New connections
Corona Energy can assist with new gas and electricity connections coordinated through local network operators.
Multi-utility supply
Corona Energy supplies electricity and gas only. Water and telecommunications are not offered.
Environmental
Corona Energy offers businesses a genuine choice of electricity supply mix, with three distinct options reflecting different sustainability and cost priorities.
ECOrona — 100% renewable electricity
ECOrona is Corona’s renewable electricity product, delivering 100% renewable electricity with zero CO₂ emissions and zero radioactive waste, backed by Renewable Energy Guarantees of Origin (REGOs). This is the appropriate product for businesses with ESG reporting requirements, supply chain sustainability obligations, or net zero commitments that require verified renewable electricity supply.
ECOrona carries a price premium over the standard supply options — the exact differential depends on consumption, location, and market conditions at the time of quoting.
Standard supply options
Corona offers two standard electricity products alongside ECOrona:
Corona Average: A balanced fuel mix with CO₂ emissions of approximately 363g/kWh, broadly in line with the UK grid average. Suitable for businesses focused on cost rather than environmental credentials.
Standard Brown: Conventional generation supply with approximately 474g/kWh CO₂ emissions — the highest-carbon option, typically carrying the lowest unit rate. Appropriate only where cost is the sole procurement criterion.
Fuel mix disclosure (April 2024 – March 2025):
| Product | CO₂ Emissions | Radioactive Waste | Renewable Content |
|---|---|---|---|
| ECOrona | 0g/kWh | 0g/kWh | 100% |
| Corona Average | 363g/kWh | 0.00021g/kWh | Balanced mix |
| Standard Brown | 474g/kWh | 0g/kWh | Minimal |
This three-tier transparency is more granular than most suppliers provide and enables businesses to make genuinely informed choices about the environmental profile of their supply.
Gas sustainability
Corona Energy does not currently offer a carbon-neutral or green gas product. Gas supply is standard natural gas. Businesses requiring whole-energy sustainability coverage for both electricity and gas should explore specialist green suppliers or the SSE Green Gas upgrade alongside ECOrona for electricity.
Sector Fit Assessment
| Sector | Suitability | Notes |
|---|---|---|
| Hospitality | ⭐⭐⭐⭐ Good | SME Fully Fixed pricing ideal for hospitality businesses managing tight margins where budget certainty is critical. Named account management suits busy operators who want a reliable point of contact. ECOrona available for hotels and restaurants with sustainability credentials to maintain. |
| Manufacturing | ⭐⭐⭐⭐⭐ Excellent | Corona’s I&C heritage and 14% commercial gas market share make it a strong fit for manufacturing. Fully Fixed pricing protects against pass-through cost volatility particularly relevant for energy-intensive operations. 24/7 corporate team support available. |
| Retail | ⭐⭐⭐⭐ Good | SME Fully Fixed removes pricing uncertainty for multi-site retail operations. Named account management scales well for businesses with multiple premises across a portfolio. ECOrona supports sustainability reporting. |
| Education | ⭐⭐⭐⭐ Good | Public sector specialist team understands procurement frameworks relevant to academies, maintained schools, colleges, and universities. Fully Fixed pricing aids annual budget setting. VAT and CCL exemption support available. |
| Healthcare | ⭐⭐⭐⭐ Good | Specialist public sector team relevant for NHS-adjacent organisations. Fully Fixed pricing aids operational budget management. Named account managers provide continuity of contact for healthcare administrators. VAT declaration support available. |
| Automotive | ⭐⭐⭐ Moderate | Standard dual-fuel supply for garages and dealerships. SME Fully Fixed useful for predictable cost planning. No EV charging or automotive-specific services offered. |
| Professional Services | ⭐⭐⭐⭐ Good | Named account management and straightforward billing suit professional services firms. ECOrona supports ESG commitments. Fully Fixed pricing removes budget uncertainty for firms managing multiple cost centres. |
| SMEs (General) | ⭐⭐⭐⭐ Good | Corona’s B2B-only focus and named account management model is well suited to SMEs that want more than a transactional supplier relationship. The SME Fully Fixed product is one of the most genuinely protective pricing structures available to smaller businesses. |
📊 Want us to compare Corona Energy against alternatives for your sector? We work across all major business energy suppliers and can benchmark Corona’s offer against the market. Request a Free Comparison
Telnergy’s Take
Our Professional Assessment
Corona Energy occupies a distinctive and underappreciated position in the UK business energy market. It is not a household name — it does not advertise on television or appear prominently in consumer comparison engines — but among energy brokers, procurement professionals, and experienced business energy buyers, its reputation is consistently strong.
What we like:
SME Fully Fixed is genuinely rare: The ability to fix not just commodity costs but all non-commodity pass-through charges — network, metering, FIT, and RO — for the full contract term is a product feature that distinguishes Corona from almost every mainstream competitor. At a time when non-commodity costs represent 40–50% of a typical electricity bill and are rising, this is a meaningful proposition for businesses that genuinely need budget certainty rather than the partial certainty of a standard fixed-rate deal.
B2B-only focus translates into a better service model: Every element of Corona’s operations is designed around business customers. There is no domestic customer base creating competing service demands, no consumer-oriented digital platform prioritised over commercial account management, and no tension between the needs of a home energy customer and a hospitality business. This single focus shows in the quality of account manager relationships and the commercial literacy of the customer service team.
Named account management is the real differentiator: In a market where most suppliers route business customers through generic call centres, Corona’s model of assigned named account managers represents a genuinely different service experience. Trustpilot reviews repeatedly reference individual account managers by name — a pattern that indicates consistent, relationship-led service rather than transactional processing.
14% I&C gas market share signals credibility: This figure reflects decades of sustained performance in the competitive industrial and commercial segment. Businesses with high gas consumption — manufacturers, large hospitality groups, healthcare providers — are well served by a supplier with this level of experience in complex, high-volume accounts.
60-day renewal notification: Proactively contacting customers 60 days before contract expiry — twice the Ofgem minimum — gives businesses a genuine window to compare the market and make an informed renewal decision. This transparency contrasts with suppliers whose renewal process is deliberately designed to minimise switching.
Watch points:
Not widely available through direct channels: Corona Energy does not publish its fixed tariff rates online and is primarily accessed through energy brokers and intermediaries. Businesses that prefer to manage procurement entirely independently may find the quoting process less straightforward than with digital-first suppliers.
Digital platform is functional, not leading edge: The online account portal meets business account management needs without matching the sophistication of platforms like Octopus Energy’s Kraken system. Businesses wanting real-time consumption dashboards, app-based management, or advanced analytics may find Corona’s digital offering limited.
Green gas not available: ECOrona covers electricity only. Businesses with whole-energy sustainability targets requiring certified green gas alongside renewable electricity will need to look elsewhere for a combined solution.
CFD excluded from both products: CFD charges are excluded from all Corona contracts regardless of product type — including the SME Fully Fixed. Businesses should factor this into their total cost modelling as CFD represents a component of the electricity bill that Corona cannot fix.
Bottom line:
Corona Energy is one of our most reliable recommendations for businesses prioritising genuine price certainty, quality account management, and I&C expertise. The SME Fully Fixed product is among the most protective pricing structures available in the UK SME market, and the named account manager model delivers a service experience that most large suppliers cannot match.
The trade-off is lower brand visibility, a less sophisticated digital platform, and no green gas option. For businesses where these factors are secondary to pricing integrity and account quality, Corona deserves serious consideration — and consistently appears on our shortlists for manufacturing, hospitality, and public sector procurement where budget certainty and supplier reliability are the primary criteria.
Is Corona Energy Right For You?
✓ Consider Corona Energy if you:
- Need genuine all-inclusive fixed pricing covering non-commodity pass-through costs (SME Fully Fixed)
- Want a dedicated named account manager rather than a generic call centre experience
- Have significant gas consumption and want a supplier with proven I&C expertise
- Operate in the public sector and need a supplier experienced in procurement frameworks
- Are in manufacturing, large hospitality, or healthcare where cost predictability is critical
- Value a B2B-only supplier whose entire operation is designed around business customer needs
- Want 100% renewable electricity (ECOrona) with clear CO₂ and fuel mix disclosure
- Appreciate a 60-day renewal notice window to allow proper market comparison
✗ Consider alternatives if you:
- Want green gas alongside renewable electricity (not currently available from Corona)
- Require a sophisticated digital self-service platform or real-time consumption app
- Need EV charging infrastructure or on-site energy generation services
- Prefer a well-known brand name for internal stakeholder approval processes
- Are a very small microbusiness with low consumption where the complexity of Fully Fixed pricing adds unnecessary overhead
Quick Comparison: Corona Energy vs Market
| Feature | Corona Energy | Market Typical |
|---|---|---|
| Minimum contract | 1–5 years | 1–2 years |
| Notice period (non-micro) | 30 days | 30–90 days |
| Renewal notification | 60 days (above minimum) | 30 days |
| Notice period (micro) | None required | None required (since 2021) |
| Back-billing protection | 12 months (Energy UK member) | 12 months |
| Non-commodity cost fixing | Yes (Fully Fixed product) | Rarely |
| Green electricity | Yes (ECOrona, REGO-backed) | Varies |
| Green gas | No | Varies |
| Named account manager | Yes | Rarely |
| Online account portal | Yes (functional) | Usually yes |
| B2B-only focus | Yes | Rarely |
| Multi-utility | Electricity and gas only | Usually dual fuel only |
| Trustpilot (business-verified) | 4.4–4.5/5 (~2,310 reviews) | Varies |
| I&C gas market share | ~14% | Varies |
Get in Touch
As an independent energy consultancy established in 2002, we have an established working relationship with Corona Energy and regularly include their products in competitive comparisons. We can:
- Obtain Corona Energy quotes on your behalf including SME Fully Fixed pricing
- Explain the Fully Fixed vs Fixed distinction clearly before you commit
- Compare Corona’s all-in pricing against 10+ other suppliers including pass-through cost modelling
- Manage the switching process for you
- Diarise renewal dates to supplement Corona’s own 60-day notification
- Advise on ECOrona renewable electricity eligibility and cost differential
Telnergy Contact Details
| Method | Details |
|---|---|
| Telephone | 01202 028888 |
| 07360 272168 | |
| hello@telnergy.com | |
| Website | www.telnergy.uk |
Page last updated: March 2026
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References
- Corona Energy. (2026). Business Electricity and Gas Supplier. Retrieved from https://www.coronaenergy.co.uk
- Trustpilot. (2026). Corona Energy Reviews. Retrieved from https://www.trustpilot.com/review/coronaenergy.co.uk
- Business Juice. (n.d.). Corona Energy SME Fully Fixed vs SME Fixed. Retrieved from https://www.businessjuice.co.uk
- Business Energy Deals. (2026). Corona Energy Reviews, Prices and Details. Retrieved from https://www.businessenergydeals.co.uk
- Smart Energy Company. (2026). Corona Energy Review. Retrieved from https://www.smart-energy.uk
- Telnergy. (n.d.). Transforming Your Energy Future Sustainably. Retrieved from /
Telnergy Limited is an independent commercial energy consultancy established in 2002, based in Christchurch, Dorset. Ofgem registered TPI · ADR Ref E3561 · CRN 04576876.