Green tariffs
Supply matched with certificates for every unit you use: REGOs in Great Britain, Guarantees of Origin across Europe. The quickest way to 100% renewable supply.
- REGO
- GO
- Fixed or flexible
Business energy brokerage
Lower carbon. Lower bills.
We broker electricity and gas for businesses of every kind, from single sites to multi-site portfolios across the UK and Europe, with 100% renewable electricity at competitive rates.
- Supply
- 100% renewable power
- Contracts
- Electricity and gas
- Coverage
- UK and Europe
- Partner
- Europe's leading data centre energy broker
One broker for every site you run.
01The problem
Where business energy goes wrong.
Energy costs creep up in a few predictable places: on the bill, at renewal and in the gaps between sites. These are the six we check first.
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Out-of-contract rates
When a fixed contract ends with nothing new agreed, supply moves onto the supplier's out-of-contract rates, which are usually much higher.
FixWe track every end date and have the next contract agreed before the current one runs out.
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Renewing at a market high
Signing the incumbent's renewal letter fixes your price at whatever the wholesale market is doing that week.
FixWe start early, tender the contract and watch the market, so you fix when the price suits you.
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Paying a premium for green
Renewable supply is often sold as an optional extra, priced on top of a standard tariff.
FixRenewable supply is part of every tender we run, priced side by side with standard offers.
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Bills nobody checks
Estimated reads, wrong rates and charges that should not be there can run for months before anyone notices.
FixWe check bills against the contract and the meter data, and chase the supplier for corrections.
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Every site on a different end date
A portfolio that renews one site at a time never gets priced as a portfolio, and one site always slips through.
FixWe line up end dates so the whole estate can be tendered together.
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No data for carbon reporting
Without accurate consumption data and certificates for your renewable supply, Scope 2 figures rest on estimates, and the market-based figure cannot show what you buy.
FixWe collect the consumption data and the certificates behind your renewable supply.
02How it works
Four steps from bill to new contract.
You see the offers side by side, you make the choice, and we stay with the contract once it is signed.
Half-hourly consumption14 days x 48 periodsIllustrative
- 12 months of bills
- Half-hourly data
- Meters and sites
- Contract end dates
TenderIllustrative
Offers receivedUnit rate, p/kWh
SupplierSupplyTermRate
Renewal letterStandard12 mo27.9
Supplier AStandard24 mo25.4
Supplier B Chosen100% renewable36 mo24.6
Supplier C100% renewable24 mo25.1
Supplier DStandard36 mo24.9
Supplier E100% renewable36 mo26.2
Illustrative figures, not a quote.
Bill checks, year oneAgainst contract and meter dataIllustrative
JanFebMarAprMayJunJulAugSepOctNovDec
Example: April query raised with the supplier and credited
Contract term36 months
SwitchRenewal reviewEnd date
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01
Review your bills and half-hourly data
We start with what you have: recent bills, meter data and contract dates for every site. That tells us what you use, when you use it and what you are paying for.
- Bills and contracts
- Half-hourly data
- Every meter, every site
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02
Tender through our energy partner
We take your requirement to market with our partner, Europe's leading data centre renewable energy broker. Suppliers compete for your contract, with renewable supply priced in from the start.
- Electricity and gas
- Fixed or flexible
- Green tariffs and PPAs
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03
Compare and choose
You get the offers side by side, including your current supplier's renewal, with term, rate and supply source laid out plainly. You make the decision.
- Like-for-like comparison
- Renewal letter included
- No obligation
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04
Switch, check bills, watch renewals
We handle the switch, check bills against the contract, and keep the renewal date in view, so the next tender starts in good time.
- Switch managed
- Bill validation
- Renewals tracked
03Timing
Work back from your contract end date.
Wholesale prices move every day. Starting early gives you a window to tender and fix when the market suits you, instead of taking whatever is on offer the week the contract runs out.
Wholesale electricity priceIllustrative, not market data
- 12 months out
Gather the data
Bills, meter data and end dates for every site, so the tender is ready to go.
- 9 to 2 months out
Tender and watch
Offers come in from suppliers and we track the market with you.
- Inside the window
Fix the price
You choose the offer and the moment, then the new contract is signed.
- End date
Switch on time
Supply moves onto the new contract the day the old one ends, with no out-of-contract period.
04Renewable
Renewable, and provably so.
Through our partner, clients buy 100% sustainable energy at very competitive rates, backed by certificates and contracts that stand up in a carbon report.
Corporate PPAs
A long-term power purchase agreement with a specific wind or solar project, either sleeved through your supplier or virtual, as a financial contract alongside your normal supply. It fixes the price of the contracted volume for years, and with a new-build project it adds renewable capacity that would not otherwise exist.
- Sleeved
- Virtual
- Wind and solar
On-site generation
Solar on roofs and car parks cuts what you draw from the grid in the first place. We look at it alongside the supply contract, so the two work together.
- Rooftop solar
- Car park canopies
- Demand reduction
Scope 2, explained
Two ways to report the same electricity.
The GHG Protocol asks companies to report Scope 2 emissions both ways. Location-based uses the average carbon intensity of the grid you draw from. Market-based reflects the electricity you contract for, so certificate-backed renewable supply can bring it close to zero.
Standard supply
100% renewable supply
Location-based: both supplies draw from the same grid, so both report the grid average, whatever the contract says.
Illustrative, not to scale.
Reporting we support
- Net zero
- Scope 2
- RE100
- SBTi
- ESG reporting
The same consumption data and certificates feed SECR and ESOS in the UK and CSRD in the EU.
05Savings
What a penny is worth.
On a large load, a small change in the unit rate adds up to a large sum. Put in your own figures and see what one penny, or more, means over a year and over a contract.
Annual consumption
4,380 MWh
500 kW x 8,760 h
Annual spend at this rate
£1,095,000
4,380,000 kWh x 25.0p
Saving per year
£43,800
4,380,000 kWh x 1.0p
Over a 3-year contract
£131,400
Saving per year x 3
A calculator, not a quote. It multiplies your figures and nothing else. Standing charges and VAT are not included. Your actual rates depend on the market, your load and the contract you choose.
06Case study, data centres, 2025
Lower rates. Fully renewable.
In 2025, several of our data centre clients renewed their energy contracts at a lower rate while moving to fully sustainable supply, cutting both bills and emissions.
What we did
- Review. Bills, consumption data and contract dates.
- Tender. Taken to market through our energy partner.
- Compare. Renewable offers set against the incumbent's renewal.
- Renew. New contracts at a lower rate, on fully sustainable supply.
Outcome
- Lower unit rate
- Fully sustainable supply
- Lower market-based Scope 2 emissions
Worked exampleNot client figures
What a penny is worth on a 2 MW load.
Average draw
2 MW
A year, at 8,760 hours
17,520 MWh
2 MW x 8,760 h
Every 1p/kWh
£175,200 a year
17,520,000 kWh x £0.01
Over a 3-year contract
£525,600
£175,200 x 3
07Sectors
What works in a data centre works on any site.
Data centres are the most energy-hungry buildings there are, which is where our expertise comes from. The same discipline works for any business that pays an energy bill.
S-01
Offices
Daytime load, often on a landlord's supply.
- Whose name the supply is in
- Half-hourly or standard meters
- Renewable supply for tenant reporting
S-02
Manufacturing
Large, process-driven load where price risk matters.
- Shift patterns and peak demand
- Gas for process heat
- Fixed or flexible purchasing
S-03
Warehousing and logistics
Long hours, cold storage and a growing fleet to charge.
- Capacity for EV charging
- Roof space for solar
- Many sites on one contract
S-04
Retail and hospitality
Many smaller sites with long opening hours.
- Aligned end dates
- Estimated bills caught early
- One contract across the estate
S-05
Healthcare and education
Long hours or round-the-clock use, and budgets set a year ahead.
- Budget certainty
- Gas for heating
- Evidence for carbon targets
S-06
Multi-site estates
Dozens or hundreds of meters, each with its own dates.
- One tender for the portfolio
- Every end date in one view
- Consolidated data for reporting
08Why Optronix
Engineers who know where the power goes.
Optronix are data centre lifecycle experts. We plan, design, build, migrate and run data centres, so we understand energy from the meter to the equipment that uses it.
Back to
- 01
Use as well as price
Designing and running data centres means working on PUE and efficiency every day. We look at how much you use as well as what you pay for it.
- 02
A specialist partner
Since 2024 we have worked with Europe's leading data centre renewable energy broker, so tenders reach the suppliers that matter in each market.
- 03
Supply and demand, one team
Supply contracts and efficiency work sit with one team, so what you pay and how much you use are looked at together.
- 04
One contact for every site
Every meter, contract and renewal across the UK and Europe, with one team that knows your estate.
09Contact
Get an indicative offer.
Tell us about your sites and your current contract. A recent bill is the quickest way to start.
- 01We review your figures and any bill you send.
- 02We come back with an indicative offer and the timing that suits your end date.
- 03If you want to go ahead, we run the full tender.