Automotive Analysis
Electric Cars: Alternating-Current Charging — Slow but Proven
Alternating-current charging accounts for more than three times as many public charge points as DC across Germany, yet it is routinely overshadowed by debate over peak rapid-charging figures. The practical and economic arguments for AC — including home tariff optimisation and solar control — are examined in detail.
Written by Emma Thompson
(2h ago)
What happened?
Germany had 155,264 publicly accessible AC charge points compared with 54,341 DC points as of 1 July, confirming AC charging's dominant position in the country's EV infrastructure.
Why it matters
AC home charging enables price-optimised and solar-controlled energy management, making it the practical and financial foundation of electric vehicle ownership for most drivers.
Alternating-current charging for electric vehicles rarely captures headlines in the way that rapid DC charging does, yet it remains by far the most prevalent form of public charging infrastructure. As of 1 July, Germany counted 155,264 publicly accessible AC charge points — more than three times the 54,341 DC points available to all users without restriction. Those totals exclude private home wallboxes, which account for the majority of everyday charging.
The continued dominance of AC charging has done little to redirect public debate, which gravitates towards peak DC power figures — whether a vehicle charges at 100 kW or upwards of 300 kW — and related concerns such as battery pre-conditioning and kilometres recovered per minute. This fixation, the source material argues, risks obscuring the practical advantages that AC charging offers, particularly at home, where it can be timed around electricity tariffs or surplus solar generation and managed in a grid-friendly manner.
The cost of upgrading
The financial case for a higher-powered onboard AC charger is illustrated by the Kia EV2. The compact electric car's optional 22 kW AC charger carries a €990 surcharge but must be ordered alongside a separate package — covering V2L and V2X hardware preparation as well as a heat pump — priced at €1,390, bringing the combined outlay to €2,380. By comparison, the standard 11 kW charger found in most vehicles replenishes roughly 20 kWh in two hours; the 22 kW unit raises that figure to approximately 40 kWh over the same period — enough, in some weekly usage patterns, to cover an entire week's driving needs from a single stop.
Not all public AC stations are capable of delivering the full 22 kW, however, meaning the practical benefit depends heavily on the infrastructure at hand. The source material notes that as electric vehicles with battery capacities exceeding 100 kWh become more common, powerful onboard AC chargers ought to be standard equipment — a threshold it observes that manufacturers have not yet consistently reached. DC wallboxes for home installation are identified as a potential future challenge to AC charging's current primacy, though they remain more expensive at present.
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Source: Heise