Charge Rates and AC & DC Charging

ABB Rapid Charger fitted for South East Ambulance Service.

At EV charging solutions we offer units in various ratings – the smallest being 3.7kW to the largest being over 44kW. But what does this mean for you and your installation?

First we need to clear up the confusion over AC and DC charging.

Standard home units and workplace charging units use alternating current (AC). All plug in vehicles will charge using an AC charger. Direct current (DC) chargers relate to rapid chargers where a vehicle can be refilled to 80% usually within 30 mins. These units are often very large, heavy and expensive, and are usually used by fleet or taxi companies where a very quick charge rate is required. It is worth noting that not all vehicles are equipped with a rapid charge connection.

As a rule of thumb, plug in hybrid vehicles (PHEVs) will charge at a maximum rate of 3.7kW giving a mile per hour charge of around 9-10 miles. Most full battery electric vehicles will charge at a higher rate of 7kW giving a mile per hour charge of around 18-20. It is worth noting that the vehicle determines the charge rate not the chargepoint. Putting a PHEV on a 7kW charge will not increase the rate of charge to 20 miles per hour.

New Motion Units at Birchwood Park Warrington

New Motion Units at Birchwood Park Warrington

For clients with Renault Zoe, the new BMW i3, BYD and Tesla – these vehicles are able to charge at higher rates on an AC charger. The new i3 will charge at 11kW as the vehicle contains 3 x 3.7kw chargers. Zoe, BYD and Tesla will charge at 22kW giving a rate of charge per hour of around 60 miles. Where clients are looking to install at workplace locations we would advise the 22kW units, as they offer the greatest flexibility if spare capacity is available.

We recommend the following AC units – Evolt, ICU and EC Charging. For DC chargers we would recommend ABB or Evolt units.

EV Charger Fitted at Winnersh Triangle Reading EV Charger Fitted at Winnersh Triangle Reading

2018-03-19T12:43:29+00:00