The Sync Energy EVAB1D is a dynamic EV load balancer hub for integration into existing panel boards. It is the hub only option in the Sync Energy EVAB1 range, intended for jobs where the installer is providing the existing DIN rail mounting position and ordering CT accessories separately. The balancer monitors available power and communicates with connected compatible chargers so that each receives managed power without exceeding the building’s safe power limit. It supports scalable EV charging layouts with up to 16 chargers connected to one hub. The unit is powered from a single-phase 220-240V, 50-60Hz supply and communicates to chargers over RS485. Commissioning can be carried out through the installer app using Bluetooth, or through the hub interface, giving installers a practical route for setting the circuit limit, phase arrangement and metering details.

• Balancer hub for existing panel board integration
• DIN rail mounting format with accessories sold separately
• Single-phase 220-240V, 50-60Hz supply to the balancer
• Supports up to 16 compatible Sync Energy chargers per hub
• RS485 communication to connected chargers
• Bluetooth 4.2 BR/EDR and BLE for commissioning
• 2% Class C equivalent internal metering with external RS485 Modbus meter option

When to choose the hub only balancer

EVAB1D is the correct buying route when the installation already has an appropriate panel board or enclosure position and the installer does not need the pre-enclosed CT kit. The manufacturer describes it as a balancer hub for integration into existing panel boards and also as the balancer only option for existing DIN rail mounting. That distinction matters because the single-phase and three-phase kits include CT clamps and an IP20 enclosure, while this hub option leaves the accessories to be specified separately.

The hub only format keeps the purchase focused where a larger distribution panel is already being built or upgraded. It also avoids buying an enclosure that may not be used on installations where panel space, gland plates and cable routes have already been planned. For related products and load management accessories, use the LAMPS EV ancillaries category.

How the balancer manages charger demand

The balancer dynamically monitors available power and communicates with compatible Sync Energy chargers to control charging demand. Its purpose is not to carry the charger load through the hub. The installation guide states that the power for the EV chargers does not run through the hub, because the hub is designed to monitor EV circuits or the complete building supply for load management.

When correctly set up, the system can support up to 16 chargers per hub. The connected chargers must have balancer multi-charger management enabled during commissioning. If communication to the balancer is lost, compatible chargers fall back to a 6A maximum charge rate and indicate a balancer communication fault, giving the installation a defined low-current fail-safe state rather than continuing unmanaged.

RS485 wiring and commissioning route

EVAB1D uses RS485 communication to the connected chargers. The cable from the balancer to the last connected charger can be up to 150m, and chargers can be looped in and out or wired back directly to the balancer. Correct polarity into the hub and chargers is required, so the wiring route should be planned before commissioning rather than treated as an afterthought.

Commissioning allows the installer to select single-phase or three-phase installation type, set the maximum circuit limit and configure CT settings. If an external RS485 Modbus meter is used for circuit monitoring, the installer can enable the power meter and enter the baud rate and RS485 address. The guide directs installers to check compatibility before using an external meter, so meter selection should be treated as a verified system design point.

Choosing EVAB1D, EVAB1ESP120 or EVAB1ETP400

The EVAB1 range has three buying routes. EVAB1D is the hub only model for existing panel board integration and has accessories sold separately. EVAB1ESP120 is the single-phase kit supplied in an IP20 enclosure with one 120A split core CT, MCB and wiring terminals. EVAB1ETP400 is the three-phase kit supplied in an IP20 enclosure with three 400A split core CTs, MCB and wiring terminals. Choose the hub only version when the panel build is already planned, choose the 120A kit for single-phase CT monitoring, and choose the 400A kit for three-phase monitored supplies.

EVAB1D questions installers ask

Loading delivery information...