Lewden

Lewden EV consumer units are purpose-built protection enclosures for dedicated EV charger circuits, supplied ready-assembled so the installer is not building a board on site. We stock 2 Lewden units: the PRO65-REV40AS with a 40A Type A RCCB and integrated Type 2 SPD in a weatherproof die-cast metal enclosure (£92), and the PRO-REV40BS with a 40A Type B RCCB and Type 2 SPD in a steel enclosure (£250). Both suit 7.2–7.4kW single-phase charger installations. Free UK delivery.

Lewden Consumer Units / All EV Consumer Units / Installer Equipment / EV Installation Kits

What Lewden products are available?

Two dedicated EV consumer units. The PRO65-REV40AS (£92) combines a 40A protective device, a Type A 30mA RCD and a Type 2 surge protection device in a die-cast metal enclosure rated for outdoor use — the choice where the board has to live outside next to the charger. The PRO-REV40BS (£250) uses a 40A Type B RCCB with the same integrated Type 2 SPD in a steel enclosure, for installations where Type B protection is required. Both are sized for dedicated 7.2–7.4kW single-phase EV charging circuits.

What is the difference between a Type A and Type B RCD?

This is the question that decides which unit you need. A Type A RCD detects AC and pulsating DC residual currents. A Type B additionally detects smooth DC residual current, which EV charging can produce. Most modern chargers include 6mA DC protection internally, and where they do, a Type A device upstream is sufficient — which is why the £92 Type A unit covers the majority of installations. Where the charger does not provide that internal DC protection, a Type B RCD is required instead, and the £250 unit is the compliant option. Check the charger's specification before ordering.

Why fit a dedicated EV consumer unit?

An EV charger draws near its rated current continuously for hours, which is unlike anything else on a domestic board. A dedicated unit gives the charging circuit its own correctly rated protection, keeps the charger off shared RCDs where a fault elsewhere would interrupt charging, and avoids replacing an existing consumer unit that is otherwise perfectly serviceable. It also makes the installation cleaner to inspect and certify. Browse all EV consumer units, including the FuseBox EV32ABDZ at £72.

What does the integrated SPD do?

The Type 2 surge protection device protects the charger and connected equipment from transient overvoltages — short, high-voltage spikes caused by nearby lightning strikes or switching events on the distribution network. EV chargers sit at the end of a long cable run on an external wall and contain sensitive electronics, which makes them more exposed than most household equipment. Having the SPD built into the same enclosure saves fitting a separate device and the board space it would take, and keeps the installation compliant with current requirements for surge protection.

Which Lewden unit should I choose?

Start with the charger specification. If it has 6mA DC protection built in — as most current smart chargers do, including Sevadis, Teltonika, Deta and Easee — the PRO65-REV40AS at £92 is the correct and far cheaper choice, and its die-cast weatherproof enclosure means it can be mounted outdoors beside the charger. Only specify the PRO-REV40BS at £250 where Type B protection is genuinely required by the charger or the installation design. If you are unsure, check the charger's product page or get in touch before ordering.