Why Businesses Installing EV Chargers Should Review Their Electricity Contract First
Installing EV charging infrastructure is a smart investment for businesses that want to attract customers, support employee commutes, and demonstrate environmental commitment. But the ongoing cost of that infrastructure depends almost entirely on the electricity tariff the business is running on. Companies that install chargers on an out-of-contract or uncompetitive electricity rate end up paying far more per charge than businesses that have secured a well-negotiated commercial tariff.
The sequence matters. Reviewing and optimizing your electricity contract before adding significant charging load to your premises gives you an accurate picture of operating costs and positions you to negotiate from the highest possible consumption base.
How Commercial EV Charging Increases Electricity Consumption
A single workplace Level 2 charger draws between 7 and 22 kilowatts depending on the specification. Running one charger for eight hours adds 56 to 176 kilowatt hours to daily consumption. Across a fleet of chargers in a commercial parking facility, the additional load can be substantial enough to move the business into a higher metering category, which affects the type of contract available and the standing charges applied.
Smart chargers with load management software distribute this demand across available capacity to avoid peak demand spikes, which is valuable both for energy efficiency and for staying within contracted demand thresholds. But the unit rate at which every kilowatt hour is billed still determines the baseline operating cost, and that rate is set by the electricity contract.
What Business Electricity Contracts Cover
Commercial electricity contracts in the UK are negotiated between the business and the supplier. The core variables are the unit rate per kilowatt hour, the standing charge per day, and the contract length. Businesses on default or deemed rates from a previous supplier are typically paying premium prices that were not competitively tendered.
Utility Bidder is a UK business energy comparison service that helps businesses compare electricity contracts from multiple suppliers based on actual consumption data. The comparison produces quotes in a consistent format, making it straightforward to evaluate total cost across different contract options and lengths.
The Business Case for Reviewing Your Contract Before Expanding Charging
When a business installs EV chargers, the electricity supplier sees a meaningful increase in annual consumption at the next renewal. That increase, if it moves the business into a new consumption bracket, can support a renegotiation for a lower unit rate because larger consumption volumes are more attractive to suppliers.
Timing a contract review to coincide with the installation of charging infrastructure means the business enters negotiations with the updated consumption profile, which is the strongest version of the procurement case. Waiting until the existing contract expires without making this connection means missing the opportunity to use the expanded consumption as leverage.
Renewable Energy Options for Charging Infrastructure
Many businesses installing EV charging prefer to offset the additional electricity consumption by sourcing from renewable energy contracts. Green electricity tariffs sourced from certified renewable generation are now available from multiple UK business energy suppliers and typically carry a modest premium over standard contracts. For businesses with a sustainability reporting framework or net-zero commitments, the premium is often justified by the reputational and compliance value.
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Frequently Asked Questions
Will installing EV chargers change my electricity contract category? If the additional load from chargers increases annual consumption above certain thresholds, it may trigger a change in meter type or profile class, which affects available tariff structures. A broker can model this before installation.
Can I get a separate electricity contract for my EV charging infrastructure? In some cases, businesses install a dedicated meter for their charging infrastructure and contract it separately. This can simplify cost allocation and make it easier to pass costs on to employees or customers using the chargers.
How quickly do electricity savings offset the cost of a contract switch? Typically immediately, since switching removes the cost premium of out-of-contract rates from the first billing period on the new contract. There are no hardware costs associated with switching electricity suppliers.
What is a deemed rate? A deemed rate is the tariff a supplier charges when a business continues using their supply after the fixed-term contract has expired and no new agreement has been made. These rates are not competitively tendered and are consistently higher than negotiated alternatives.
