Electrical connections

Danger

• Danger to life from electrical voltage.
• Installation must only be carried out by qualified personnel.
• De-energise the system before carrying out any work.
• Do not install damaged components.

System overview

modual delivers the modual Core, the HV battery system and the HV inverter, pre-wired to each other. The customer provides the connections at the bottom of the table.

Connection	From	To	Type
Power supply (12 V), low voltage, CAN bus	modual Core	HV battery	Pre-wired
High voltage DC and PE	HV battery	HV inverter	HV connector, earth cable
BMS data	modual Core	Inverter “BMS” port	CAN bus
Energy meter (optional)	Inverter “Meter” port	Eastron energy meter	RS485
Mains supply	Customer	modual Core	230 V, 1-phase, 10 A
Network	Customer LAN	modual Core	Ethernet
Network	Customer LAN	Inverter data logger	Ethernet or Wi-Fi
Grid	Customer	Inverter “GRID” terminal	400 V AC, 3-phase, 32 A
EMS (optional)	e.g. Solar Manager	Inverter “RS485” port	RS485
Equipotential bonding	Building	Inverter	PE

Rack overview

No.	Component
1	Battery status LED
2	modual Core
3	Network connection, main switch, mains connection (underside of the modual Core)
4	Battery signal connector
5	HV battery connector
6	Battery inverter
7	Inverter network connection

Connecting the system

1. Connect the earth terminal of the battery pack to the inverter, using the earthing screw on the inverter. With the inverter mounted on the pack, this connection is already in place.

   

2. Connect the inverter to the building’s equipotential bonding system.

3. Connect the modual Core to the local network, using the RJ45 socket on the underside of the housing.

   

   Caution

   This connection is required to comply with the warranty conditions.

4. Connect the Solis inverter to the local network, through the network interface of the Solis data logger or through the local Wi-Fi. See the Solis inverter user manual.

   

5. Remove the cover of the Solis inverter (8 screws). Connect the data cable from the modual Core to the BMS port of the inverter. With the inverter mounted on the pack, this connection is already in place.

   

6. If you are using a compatible energy management system (e.g. Solar Manager Connect 2), connect its RS485 cable to the RS485 port of the inverter.

   

   RS485 pin assignment (EIA/TIA 568B)

   RS485A to pin 1 (orange/white), RS485B to pin 2 (orange).

   

7. If you are using the supplied energy meter (Eastron), connect it to the Meter port of the inverter. The pin assignment is the same as for RS485 above.

   

8. Carefully plug the prepared HV connector into the battery pack. You should hear and feel it click into place.

   

9. Connect the power cable of the modual Core to a T13 socket (230 V / 50 Hz). If your installation requires it, you can instead connect the cable directly to an additional junction box. The circuit must be fused at 10 A.

   Danger

   Before installing the AC cables, make sure the circuit breakers (OCPDs) are switched off. Use a multimeter to check that the AC voltages are 0 V AC before proceeding.

10. Connect the 3-phase AC cable to the GRID terminal of the inverter (N, U, V, W, PE).

    

11. Carry out all measurements required by law.

12. Refit the cover of the Solis inverter with the 8 screws.

Continue with commissioning.