Fronius Battery Storage Solution

with Fronius GEN24 Plus and BYD Battery-Box Premium HVS/HVM

The Advantages at a Glance:

Use of PV energy also possible at night
Demand-oriented backup power variants
Simultaneous supply of the loads and charging of the battery also possible in the event of a power outage
High self-consumption and self-sufficiency rates

Onboard Basic Backup Power Supply: The PV Point

Single-phase loads in households up to 3 kW can be supplied with backup power
No additional installations necessary
Automatic activation in case of a grid outage

Configuration Scheme

Diagram shows a PV GENERATOR connected to a FRONIUS GEN24 PLUS inverter. The inverter can be configured for VARIANT 1: PV POINT or VARIANT 2: FULL BACKUP. The PV POINT variant connects to a DC-COUPLED BATTERY STORAGE SYSTEM and has a Modbus RTU/RS 485 connection. The FULL BACKUP variant connects to a FRONIUS SMART METER, UTILITY METER, and the GRID, with HOUSEHOLD LOADS connected. Communication paths and power paths are indicated.

What is Needed to Implement the Fronius Battery Storage Solution?

Device	Type	Note
Inverter	Fronius Primo GEN24 (3.0-6.0) Plus or Symo GEN24 (6.0-10.0) Plus	Depending on the type of inverter and the type and capacity of the battery
Battery Storage System	BYD Battery-Box Premium HVS/HVM	More details available at eft-systems.de and alpspower.com.au.
Fronius Smart Meter	63A-1; 63A-3; 50KA-3 240V-3 UL; 480V-3 UL; 600V-3 UL	Suitable for single-phase and three-phase grids. Measures energy consumption and energy from the grid.
Communication Inverter with Battery		The inverter communicates with the battery via a shielded 4-pin cable (CAT5 and higher) via Modbus RTU (RS485). Terminating resistors must be set at the end of the ring. Refer to GEN24 Plus Operating Instructions for details.
Communication Inverter with Smart Meter		Cable connection (CAT5 and higher) via Modbus RTU (RS485).

Backup Power Options *

Variant 1: Backup Power Variant: "PV Point"

For the PV Point, a socket must be connected to the OP-terminal of the inverter in accordance with the installation standard. The PV Point can be implemented with or without a battery storage. For further details on installation, please refer to the GEN24 Plus Operating Instructions.

Variant 2: Backup Power Variant: "Full Backup"

For the Full Backup, additional mains switchover contactors or auxiliary relays (Enwitec) are required. The requirements for this switchover vary from country to country - please contact your grid operator. For the Full Backup, a battery storage is required.

* Only one of the two backup power variants can be implemented.

Compatibilities and Maximum Charging and Discharging Power

BYD Battery-Box Premium *

	HVS 5.1	HVS 7.7	HVS 10.2	HVM 8.3	HVM 11.0	HVM 13.8	HVM 16.6	HVM 19.3	HVM 22.1
Usable capacity of the battery [kWh]	5.1	7.7	10.2	8.3	11.0	13.8	16.6	19.3	22.1
Nominal voltage of the battery [V]	204	307	409	153	204	256	307	358	409
Battery operating voltage [V]	160-240	240-360	320-480	120-180	160-240	200-300	240-360	280-420	320-480
Max. charge/discharge current Primo/Symo GEN24 Plus [A]	22	-	-	-	22	-	-	-	-

* Values according to BYD.

Maximum Charging and Discharging Power with GEN24 Plus (kW)

	HVS 5.1	HVS 7.7	HVS 10.2	HVM 8.3	HVM 11.0	HVM 13.8	HVM 16.6	HVM 19.3	HVM 22.1
Primo GEN24 3.0 Plus	3.2	3.2	3.2	3.2	3.2	3.2	3.2	3.2	-
Primo GEN24 3.6 Plus	3.9	3.9	3.9	3.9	3.9	3.9	3.9	3.9	-
Primo GEN24 4.0 Plus	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2	-
Primo GEN24 4.6 Plus	4.5	4.9	4.5	4.5	4.9	4.9	4.9	4.9	-
Primo GEN24 5.0 Plus	4.5	5.3	4.5	4.5	5.3	5.3	5.3	5.3	-
Primo GEN24 6.0 Plus	4.5	6.3	4.5	4.5	5.6	6.3	6.3	6.3	-
Symo GEN24 6.0 Plus	4.5	6.3	6.3	4.5	5.6	6.3	6.3	6.3	-
Symo GEN24 8.0 Plus	4.5	6.8	8.3	4.5	5.6	6.8	7.9	8.3	-
Symo GEN24 10.0 Plus	4.5	6.8	9.0	4.5	5.6	6.8	7.9	9.0	-

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