Summary
E.ON Next's overnight rate is now 6.5p per kWh from midnight to 6am. On the price cap the same unit is 26.32p. A 40kWh charge is £2.60 versus £10.53.
On 27 October 2026, E.ON Next cut the overnight rate on its Next Drive Smart tariff to 6.5p per kWh, from midnight to 6am. The Ofgem price cap for 1 October to 31 December 2026 averages 26.32p per kWh. The 6.5p figure is one supplier's tariff. It is not the price every household pays.
The short answer. On E.ON Next's tariff page, dated 28 October 2026, Next Drive Smart is 6.5p per kWh between midnight and 6am, and the rate applies to the whole home.
The same page says that if the app schedules the car to charge outside that window, the house is billed at 6.5p for that slot as well. Boost, or charging without the smart feature during peak hours, is billed at 34.322p per kWh. E.ON Next says that if you do not use Boost, you are charged 6.5p. The press note sent on 21 October quoted a day rate of 34.04p. The later product page is the figure used here.
E.ON Next also says that, as of 22 October 2026, 6.5p was the lowest dedicated off-peak EV tariff in the comparison it published. That comparison left out bundled products, broker exclusives and bolt-ons, and the supplier says the saving is not guaranteed. Other companies publish their own overnight rates, so the number that matters is the one on the quote in front of you. The product terms are on the Next Drive Smart page, and the cut was announced in E.ON Next's 27 October notice.
The short answer. At 6.5p, 40kWh costs £2.60. At the October to December cap of 26.32p, the same 40kWh costs £10.53.
Using 4 miles per kWh as a worked example, those four rates are about 1.6p, 2.1p, 6.6p and 8.6p a mile. That efficiency is there so the prices can be compared. It is not a claim about every car. The standing charge is separate. Moving the car's units into the overnight window does not remove it.
E.ON Next's annual comparison uses different assumptions: 8,000 miles a year at 3.33 miles per kWh, charged at the overnight rate rather than at 26.32p. That is about 2,402 kWh. At 6.5p it comes to about £156, and at 26.32p about £632, which is the £476 gap the supplier publishes. The same sum at 8.5p is the £428 gap it publishes for Next Drive Fixed. Both figures are the supplier's comparison, not a promise for every driver.
The short answer. The rate is for customers on that tariff who have an eligible electric vehicle and charger, and a smart meter that can provide half-hourly readings.
A household still on a standard variable tariff pays the cap rate, unless their supplier has a different unit price within the cap. A fixed deal signed earlier keeps its own rate until it ends. Electricity used outside the cheap window, including a daytime Boost, is not 6.5p. E.ON Next says these two tariffs have no exit fees. Eligibility still has to be checked before a switch, and the cap rate itself varies by region.
The short answer. Ofgem will announce the price cap for 1 January to 31 March 2027 by 25 November 2026. A fixed overnight rate does not have to change on the day that announcement lands.
The current cap, for a typical Direct Debit household in England, Scotland and Wales, is £1,723 a year. The average electricity unit rate is 26.32p per kWh and the average electricity standing charge is 54.83p a day. Ofgem says those electricity figures include no VAT. On 28 October 2026 the Budget extended the 0% VAT rate on qualifying domestic electricity in Great Britain from 31 March 2027 to 30 June 2027. The legislation is due in early 2027. Northern Ireland stays at 5% for now. The Budget says funding is being provided so comparable support can apply there from April 2027. The dates are in HMRC's VAT notice and the Budget tax overview. The unit rates are on Ofgem's price-cap page.
The short answer. The useful comparison is your own mileage, and whether the car can actually charge in the cheap window. The savings calculator applies home rates to the miles you drive.
If the car can charge at home, you can get a quote for the charger, then set the overnight rate next to the cap before you switch.