What the Sync Energy EVAB1ETP400 is

Sync Energy EVAB1ETP400 is a dynamic EV load balancer kit for three-phase installations. It is intended for sites where multiple compatible Sync Energy chargers may operate at the same time and where the total charging demand has to be controlled against the wider building load. The product is supplied in an IP20 steel enclosure with an integrated 6A MCB and three 400A CT clamps, giving the installer a dedicated three-phase balancing package rather than a hub alone.

On real projects, that matters because three-phase charging sites often involve more variables than a domestic single-phase installation. Building demand can change quickly, phases can be loaded unevenly, and charger numbers may grow over time. A correctly specified balancer helps the installation respond to those changes more intelligently.

Who it suits

EVAB1ETP400 suits three-phase properties where charger demand must be managed instead of simply left to run at full power. Typical examples include commercial sites, staff car parks, fleet depots, mixed-use buildings, light industrial units, hospitality venues, and larger residential properties with a three-phase service and several compatible chargers.

It is also a sensible option for future-minded projects. Because the balancer supports up to 16 chargers per unit, it can suit a phased rollout where only a few charge points are installed initially but extra chargers may follow later. Putting the correct balancing platform in place early can reduce redesign work later.

Key features and practical benefits

• Three-phase dynamic load balancing for compatible Sync Energy charger systems.
• Supplied with three 400A CT clamps for monitoring load across all three phases.
• Enclosed IP20 steel housing with 6A MCB for a complete packaged solution.
• Supports up to 16 chargers per balancer.
• RS485 charger communication for coordinated charging control.
• Local balancing operation without relying on a permanent subscription connection.

The main commercial benefit is better use of available electrical capacity. Instead of oversizing the charger installation and hoping the site never hits a demand peak, the balancer lets the project use the available supply more deliberately. That can help avoid needless infrastructure spend while still delivering a scalable charging setup.

Another important advantage is operational resilience. On a site with several users, unmanaged charging can quickly create avoidable problems if vehicles are plugged in during other periods of high demand. A dynamic balancer helps the chargers respond to site conditions rather than ignoring them.

Technical detail that matters in practice

The published specification identifies EVAB1ETP400 as the three-phase kit supplied with three CT clamps rated up to 400A. The balancer itself takes a single-phase 220 to 240V, 50 to 60Hz input and uses RS485 communication to coordinate compatible chargers. The specification also states 2% Class C equivalent internal meter accuracy with the option to connect an external RS485 Modbus meter.

The enclosure is IP20, so the expected mounting environment is indoors or within a suitable protected electrical area. That is a practical specification point rather than a marketing one. The balancer is there to manage power allocation, not to act as an outdoor charger body.

It is also useful that the specification distinguishes this kit clearly from the other balancing options. EVAB1ESP120 is the single-phase enclosed kit with one 120A CT clamp. EVAB1D is the DIN rail module for integration into an existing panel. That makes EVAB1ETP400 the correct choice when the project needs an enclosed three-phase solution with the higher-capacity CT set included.

Installation and fitment considerations

As with any load management product, correct installation depends on correct CT placement, phase awareness, and commissioning. The three CT clamps must be installed in the right positions and orientations so the balancer can read the site load properly. On a three-phase site, that is particularly important because charger allocation decisions rely on accurate phase information.

Communications planning also matters. The balancer works with compatible chargers over RS485, so the cable route, panel position, and possible future charger extensions are worth considering early in the design. Leaving sensible allowance for later expansion can make the installation more useful over the long term.

Where the project needs a module-only arrangement for an existing board, the EVAB1D dynamic load balancer module may be more appropriate. Where the supply is actually single-phase, the EVAB1ESP120 single-phase kit is the better fit. Compatible charger ranges can be explored through commercial EV chargers and home EV chargers.

Why this variant may be the right choice

EVAB1ETP400 stands out because it is built around the needs of higher-capacity three-phase installations. It is not a generic accessory and it is not a stripped-back controller. It is a purpose-defined kit that includes the balancer, enclosure, protective device, and the correct three-phase 400A CT clamp set.

That matters when the site brief includes growth. A workplace or depot may start with a few chargers but end up with significantly more. Specifying the correct balancing platform at the outset gives the project a firmer base for expansion and reduces the risk that charger growth will create avoidable electrical constraints.

It is also the more sensible choice where the load profile is complex. On sites with varying building demand, the ability to monitor and respond across all phases is far more useful than treating EV charging as an isolated load.

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