A full KGM Torres EVX charge costs about £19.32 at the Ofgem average household electricity benchmark used for 1 October–31 December 2026. The same nominal battery energy costs about £39.64 on a slower public charger averaging 54p/kWh, or £56.52 on a rapid charger averaging 77p/kWh.
Those figures use the UK Torres EVX’s 73.4kWh battery and are energy-in-battery estimates before charging losses. Your actual home bill depends on your tariff, while a public session depends on the operator’s current price, subscriptions and payment conditions.
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The headline charging costs
KGM lists the UK Torres EVX with a 73.4kWh battery. Multiplying that capacity by the relevant electricity price gives a useful comparison, but it is not the same as measuring electricity taken from the mains: charging losses mean the wall normally supplies more energy than reaches the battery.
| Charging situation | Illustrative price | Nominal 0–100% (73.4kWh) | Nominal 10–80% (51.38kWh) |
|---|---|---|---|
| Home, Ofgem default-tariff benchmark for England, Scotland and Wales, 1 October–31 December 2026 | 26.32p/kWh | £19.32 | £13.52 |
| Slower public charging, reported UK average for August 2026 | 54p/kWh | £39.64 | £27.75 |
| Rapid public charging, reported UK average for August 2026 | 77p/kWh | £56.52 | £39.56 |
The home figure comes from Ofgem’s average default-tariff unit rate for Direct Debit customers. Ofgem states that the 26.32p figure excludes VAT for this period, and it is a national average rather than a quote for every household. Northern Ireland is not covered by that England, Scotland and Wales benchmark. The public figures are averages reported from Zapmap’s August 2026 price index through EVCompared.co.uk, not guaranteed prices at a particular site.
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What the 73.4kWh battery figure means
A battery capacity is the energy quantity used for a simple estimate. A 10–80% session adds 70% of the stated capacity:
- 73.4kWh × 70% = 51.38kWh added to the battery.
- At 26.32p/kWh, 51.38 × £0.2632 = £13.52.
- At 54p/kWh, 51.38 × £0.54 = £27.75.
- At 77p/kWh, 51.38 × £0.77 = £39.56.
A car’s usable energy may not exactly equal its advertised gross capacity because manufacturers reserve some energy for battery protection. KGM’s published 73.4kWh figure is therefore the appropriate basis for the transparent estimates above, not proof that every charging session will show exactly that amount on a meter.
Home charging cost in detail
Using your household unit rate
The calculation is:
energy added in kWh × your electricity price in £/kWh = estimated energy cost
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For the most accurate home estimate, use the electricity unit rate that applies during the charging period and, if your charger or energy monitor reports it, the actual kWh delivered from the grid. Do not use the standing charge as though it were a per-kWh charging cost: it is normally payable whether or not the car is plugged in.
Why the bill can exceed the simple arithmetic
AC charging involves the car’s onboard charger, the charge point and the battery-management system. Conversion and balancing consume some energy as heat and system overhead. The 73.4kWh calculation describes energy entering the battery, whereas your meter records energy supplied to the charging equipment. Because no single loss percentage is published for every temperature, state of charge and charger, an exact wall-to-battery adjustment cannot be stated responsibly.
Overnight and time-of-use tariffs
A dedicated overnight EV tariff can make home charging cheaper during its low-rate window, but the headline cheap rate is not enough to judge the whole tariff. Compare the off-peak unit rate with the tariff’s other unit rate and standing charge, and confirm when the low-rate period applies. Apply the same kWh formula to the rate in force while the Torres EVX is charging.
Three-pin, 11kW and installation costs
KGM recommends a dedicated home charge point and describes it as approximately three times faster than a three-pin plug. Its brochure also describes an optional portable household-outlet charger as an emergency solution: at 2kW, a full charge is quoted at about 30 hours. A regular home installation is a separate one-off expense and is not included in any per-charge figure in this article.
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- Fast & Powerful: This EV charger charges 9× faster than a 120V outlet, delivering up to 45 mi/hr., dependent upon your vehicle. It features a J1772 connector for all non-Tesla EVs and plugs into a 240V outlet with a 14-50 receptacle, requiring a 40A or 50A circuit. For Tesla EVs, this will require an adapter
The vehicle is specified for up to 11kW AC charging. KGM quotes about nine hours for 0–100% on an 11kW AC connection. A charge point advertised as 22kW will not make the car accept 22kW; the vehicle’s onboard charger, electrical supply and the point’s output all set the actual rate.
Public charging cost in detail
Slower public charging
Using the reported 54p/kWh August 2026 average, the nominal cost of 73.4kWh is £39.64. A 10–80% increment of 51.38kWh is £27.75. This category can include AC destination or other lower-power public points, but the average is not a promise that every site will charge 54p/kWh.
Rapid public charging
At the reported 77p/kWh rapid-charging average, 73.4kWh costs £56.52 on the same nominal basis. A 10–80% session costs £39.56. Rapid prices can be substantially higher than home electricity because the network funds high-power equipment, site operation and access arrangements; the relevant fact for your session is still the price displayed by that operator.
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Check the price before you start
UK guidance requires the public charge-point price in pence per kWh to be made clear on the point or through a separate device. Check the charger’s display or the operator’s current information before authorising a session. Subscription rates, app discounts and session conditions can change the effective price, so a published network average should never replace the live price at the charger.
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How to calculate your own Torres EVX session
- Find the applicable unit price. Use the rate on your household bill for home charging. For public charging, use the current displayed p/kWh price and any clearly stated account condition that applies to you.
- Work out the energy increment. Subtract the starting battery percentage from the target percentage, then multiply by 73.4kWh. For 20–80%, the difference is 60%, so 73.4 × 0.60 = 44.04kWh.
- Convert pence to pounds. Divide the displayed pence figure by 100. For example, 54p becomes £0.54.
- Multiply energy by price. A 20–80% session at 26.32p/kWh is 44.04 × £0.2632 = £11.59 before losses. At 54p it is £23.78; at 77p it is £33.91.
- Account for measurement limits. A battery-percentage estimate is not a meter reading. If you need the amount actually billed at home, use the charger’s or energy monitor’s measured grid kWh.
How long charging takes
KGM’s UK brochure gives these manufacturer estimates:
| Connection | Quoted session | Estimated time |
|---|---|---|
| 350kW rapid charger | 10–80% | About 28 minutes |
| 100kW fast charger | 20–80% | About 37 minutes |
| 11kW AC home charging | 0–100% | About 9 hours |
| 2kW household outlet charger | 0–100% | About 30 hours |
These are not guarantees. KGM says charging time varies with ambient temperature, battery condition and charger specification. DC charging also tapers as the battery approaches a high state of charge, so the final part of a session is usually slower than the initial ramp-up. The Torres EVX’s CCS connection and battery limits determine how much power it can actually accept; plugging into a 350kW unit does not mean the car charges at 350kW.
Energy use and cost per mile
KGM quotes a combined WLTP range of up to 287 miles. Dividing 73.4kWh by 287 miles gives a simple ratio of about 0.256kWh per WLTP mile. Applying the three illustrative prices produces:
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|---|---|
| 26.32p/kWh home benchmark | About 6.7p |
| 54p/kWh slower public average | About 13.8p |
| 77p/kWh rapid public average | About 19.7p |
This is a calculation from the published battery capacity and WLTP range, not a measured real-world running cost. Actual miles per charge vary with speed, temperature, heating or air-conditioning use, terrain, load, tyres and driving style. If your car’s trip computer or measured charging data gives a different consumption figure, multiply that real consumption by your actual electricity price for a more personal result.
Home versus public charging: which is cheaper?
On the cited prices, home charging is the lowest-cost option per kWh. A nominal full battery at the 26.32p home benchmark is £19.32, compared with £39.64 at the slower public average and £56.52 at the rapid average. Public charging trades a higher unit price for access away from home and much shorter charging times.
| Decision factor | Home | Public |
|---|---|---|
| Price to use | Your household tariff, including any time-of-use window | Live operator price, subscription or app condition |
| Energy basis | Measured wall kWh or battery estimate | Displayed p/kWh multiplied by energy added |
| Typical speed in KGM specifications | 11kW AC; about nine hours for 0–100% | Up to the car and site limits; about 28 minutes for 10–80% on a quoted 350kW setup |
| Extra cost to consider | Dedicated charge-point installation is a separate one-off expense | Check the site’s current terms and displayed price before charging |
Practical ways to keep charging costs predictable
- Record your actual household p/kWh rate rather than relying on a national average.
- Schedule charging inside a confirmed low-rate period if your tariff offers one, while checking the tariff’s standing charge and non-peak rate.
- Use public rapid charging when time or route demands it, not as the default price benchmark for every charge.
- Start with the energy you need for the next journey instead of assuming every stop must be 0–100%; the 10–80% calculation is often more representative of normal use.
- Read the live public price immediately before starting because averages from August 2026 do not establish today’s price at an individual site.
- Keep the distinction between battery energy and wall energy in any household-cost comparison so losses are not mistaken for a tariff change.
What can change these estimates
The figures are tied to dated inputs: KGM’s currently listed 73.4kWh battery and 287-mile WLTP range, Ofgem’s 26.32p/kWh benchmark for 1 October–31 December 2026, and public averages reported for August 2026. Electricity prices, public-network rates and vehicle specifications can change. Recalculate with the latest battery specification and the rate shown on your bill or at the charger whenever those inputs change.
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