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SOLAR ENERGY
INSTALLERS & PARTNERS

Fronius Storage solutions Product Guide



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

The BYD Battery-Box Premium HVS/HVM is the successor of the BYD Battery Box HV. The BYD Box Premium Line is compatible with GEN24 Plus (HVS/HVM) and Symo Hybrid (HVM). The capacities of the batteries range from 5.1–10.2 kWh (HVS) and 8.3-22.1 kWh (HVM). Fronius has once again achieved true grid back-up, with the BYD Battery-Box Premium HVS/HVM. This means that even three-phase loads can be used in a grid back-up situation.   

Please note:

/ During commissioning, make sure to set up the BYD using the BeConnect App first, then afterwards commission the GEN24 Plus.

/ The BYD battery should always be turned on before the inverter.

Turning the system off:

  1. Battery OFF: Hold the power button on the front at least 5 seconds.
  2. Inverter OFF:  Switch off the DC-side (rotary switch on the inverter) and the AC-side (circuit breaker).
  3. Leave the components off for at least 30 seconds. The LEDs of the inverter and battery must be completely off.

Turning the system on:

1. Battery ON: Switch on the battery fuses. If you're unable to switch on the fuses, hold the power button for 5 seconds and try again.

2. Inverter ON: Switch on the DC-side (rotary switch on the inverter) and the AC-side (circuit breaker).

Further information on this storage solution and its backup feature can be found in the Fronius GEN24 Plus Product Guide.

Parallel operation GEN24 plus and BYD Battery-Box Premium HVS/HVM

Due to the cascadability of the BYD Battery-Box Premium HVS/HVM, up to 3* batteries can be operated in parallel on one GEN24 hybrid inverter. The advantage of running multiple storage units in parallel is that high capacities can be achieved. Thus, even small commercial systems can be realized with the combination of GEN24 Plus and BYD Battery-Box Premium HVS/HVM. For more information, please refer to the battery storage solution sheet in the download area.Parallel operation of several GEN24 hybrid inverters, each with one or more connected batteries, is not possible.

* Attention: The combination of 3x HVM 22.1 is not possible!

Fronius GEN24 Plus with LG RESU FLEX

With the Fronius GEN24 Plus hybrid inverter and the high-voltage battery from LG Energy Solution, your customers get 24 hours of sunshine in their homes. This means they have their harvested PV energy reliably available at night and even in the event of an emergency power supply. The combination of Fronius GEN24 Plus and LG RESU FLEX enables high charging or discharging capacities for optimal use of the solar energy from your own PV system. This not only enables higher self-consumption, but also sustainably ensures greater self-sufficiency and independence from the public power grid. 

The LG RESU FLEX is clearly visualized in Fronius Solar.web. This gives you an overview of all data at all times - conveniently at the click of a button in just one app. 

The LG RESU FLEX battery convinces with the following strengths:

  • Lithium battery storage (NMC), modularly expandable in 4.3 kWh steps.
  • Storage capacities of 8.6 kWh, 12.9 kWh and 17.2 kWh*
  • Emergency power capability (with PV point as well as full backup)
  • Different variants of floor and wall mounting possible
  • Temperature, water and dust resistant housing (IP 55 protection class)

* depending on type of inverter, country specific certification and availability

Fronius GEN24 Plus battery management

With battery management (time-of-use), rules can be defined according to which the battery is to be charged or discharged - depending on the day of the week and the time of day.

The advantages of this function:

  • Individual definition of weekday and time of day dependent rules.
  • Possibility for electricity tariff-dependent battery charging from the grid
  • Reservation of storage capacity for the times with high PV production

Fronius Symo Hybrid with BYD Battery-Box Premium HVM

The Fronius Symo Hybrid inverter is compatible with the BYD Battery-Box Premium HVM since firmware 1.16.6-1. The firmware of the inverter can be updated on Solar.web under Settings - Components.The wiring plan for the Fronius Symo Hybrid - BYD Box Premium HVM is available in the Battery-Box Premium HVS/HVM Quick Start Guide, available in the external BYD Downloads.

Please note:

/ During commissioning, make sure to set up the BYD using the BeConnect App first, then afterwards commission the Symo Hybrid.

/ The BYD battery should always be turned on before the inverter.

Turning the system off:

  1. Battery OFF: Hold the power button on the front at least 5 seconds.
  2. Inverter OFF:  Switch off the DC-side (rotary switch on the inverter) and the AC-side (circuit breaker).
  3. Leave the components off for at least 30 seconds. The LEDs of the inverter and battery must be completely off.

Turning the system on:

  1. Battery ON: Switch on the battery fuses. If you're unable to switch on the fuses, hold the power button for 5 seconds and try again.
  2. Inverter ON: Switch on the DC-side (rotary switch on the inverter) and the AC-side (circuit breaker).

Backup Power

The Fronius Symo Hybrid with BYD Battery-Box Premium HVM offers a 3-phase backup power feature. The switchover from normal operation to backup power takes less than 90 seconds. A backup power switchover system is required (e.g. Enwitec switchover box). The respective version must be clarified with the grid operator.

Please note: The Fronius Symo Hybrid is a grid-connected inverter with a backup power function – it is not a stand-alone inverter. The backup power mode must not be in operation for more than 15% of the duration of the inverter's overall operating hours.


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