Fronius Reserva Pro 12.0 - 32.0 kWh

Warnings are intended to warn people of possible injuries and to avoid personal injury and damage to the product. They relate to individual actions with and on the product.

Safety instructions are designed to ensure safe product use. They are preventive and help to inform users about the fundamental risks involved when dealing with the product. They do not refer specifically to individual actions with and on the product.

Warnings are intended to warn people of possible injuries and to avoid personal injury and damage to the product. They relate to individual actions with and on the product.

Safety instructions are designed to ensure safe product use. They are preventive and help to inform users about the fundamental risks involved when dealing with the product. They do not refer specifically to individual actions with and on the product.

Warnings are intended to warn people of possible injuries and to avoid personal injury and damage to the product. They relate to individual actions with and on the product.

Safety instructions are designed to ensure safe product use. They are preventive and help to inform users about the fundamental risks involved when dealing with the product. They do not refer specifically to individual actions with and on the product.

The device has been manufactured in line with the state of the art and according to recognized safety standards.

IMPORTANT!
Labels, warning notices, and safety symbols are located on the device. A description can be found in these operating instructions.

In certain cases, even though a device complies with the standard limit values for emissions, it may affect the application area for which it was designed (e.g., when there is equipment that is susceptible to interference at the same location or if the site where the device is installed is close to either radio or television receivers). If this is the case, the operator is obliged to take action to rectify the situation.

During operation, due to the high electrical voltages and currents, local electromagnetic fields (EMF) are generated. These occur in the immediate vicinity of the inverter and the Fronius system components. Electromagnetic fields are also present in the area of the PV modules and their supply lines.

As long as the intended use and a minimum distance of 20 cm are observed, all limit values for human exposure are observed.

If the limit values are complied with, according to current scientific knowledge, no negative health effects from EMF exposure are to be expected. For persons with prostheses¹⁾ or active physical aids²⁾, there is a possible health risk in the vicinity of photovoltaic system components. To avoid possible health risks, consult with the responsible doctor.

¹⁾ e.g., implants or metal parts

²⁾ e.g., pacemaker, insulin pump, hearing aid, etc.

The connection of a defined point in the device, system, or installation to earth serves either to protect against electric shock in the event of a fault (protective earthing) or to ensure a defined electrical potential for operation (functional grounding).
When installing a battery system, a ground conductor connection is required depending on the safety class (see Technical data).

When connecting the ground conductor, ensure that it is secured against unintentional disconnection. All of the points listed in the chapter headed Connecting the ground conductor (PE) on page (→) must be observed. When using cable glands, make sure the ground conductor will be the last conductor subjected to mechanical stress in the event of a cable gland failure. The respective national standards and regulations and requirements for minimum cross-section must be observed when connecting the ground conductor.

 Technical data, markings, warnings, and safety symbols are applied to the battery. This information must be kept in a legible condition and must not be removed, covered, painted over, or concealed by stickers or labels. The information and symbols warn against incorrect operation, which may result in serious injury and property damage.

Rating plate / warning notice on the battery management system

Rating plate / warning notice on the battery module

Explanation of symbols
	CE label – confirms compliance with applicable EU directives and regulations.
	RCM marking – tested according to the requirements of Australia and New Zealand.
	VDE marking – tested according to the requirements of the Association of Electrical, Electronic and Information Technology (VDE).
	Safety class 2 marking – identifies electrical devices that belong to safety class 2 and have reinforced or double insulation.
	Separate collection – Battery Regulation 2023/1542/EU – batteries must be collected separately in accordance with the EU regulation and handed over to waste management for environmentally sound disposal or recycling.
	Recyclable – the product is recyclable or made from recycled materials.
	Do not reverse polarities
	General Warning Sign
	Warning: Electric voltage
	Warning: Heavy load
	Warning: Hazards due to the charging of batteries
	Warning: Explosive substances
	Follow the operating instructions
	Keep out of reach of children and animals
	No open flame; fire, open source of ignition, and smoking prohibited

 Technical data, markings, warnings, and safety symbols are applied to the battery. This information must be kept in a legible condition and must not be removed, covered, painted over, or concealed by stickers or labels. The information and symbols warn against incorrect operation, which may result in serious injury and property damage.

Rating plate / warning notice on the battery management system

Rating plate / warning notice on the battery module

Explanation of symbols
	CE label – confirms compliance with applicable EU directives and regulations.
	RCM marking – tested according to the requirements of Australia and New Zealand.
	VDE marking – tested according to the requirements of the Association of Electrical, Electronic and Information Technology (VDE).
	Safety class 2 marking – identifies electrical devices that belong to safety class 2 and have reinforced or double insulation.
	Separate collection – Battery Regulation 2023/1542/EU – batteries must be collected separately in accordance with the EU regulation and handed over to waste management for environmentally sound disposal or recycling.
	Recyclable – the product is recyclable or made from recycled materials.
	Do not reverse polarities
	General Warning Sign
	Warning: Electric voltage
	Warning: Heavy load
	Warning: Hazards due to the charging of batteries
	Warning: Explosive substances
	Follow the operating instructions
	Keep out of reach of children and animals
	No open flame; fire, open source of ignition, and smoking prohibited

The conventions regarding how information is presented in the document, which are set out below, have been defined in order to increase the readability and comprehensibility of the document.

Application notes

IMPORTANT! Indicates application notes and other useful information. It does not indicate a harmful or dangerous situation.

Software

Software functions and elements of a graphical user interface (e.g., buttons, menu items) are highlighted in the text with this mark up.

Example: Click Save.

Instructions for action

This document provides detailed information and instructions to ensure that people can use the machine safely and efficiently.

Regardless of any qualifications, only perform the activities listed in this document.

The definition of professional qualifications and their applicability are subject to national law.

¹⁾ TCP/IP - Transmission Control Protocol/Internet Protocol
²⁾ MQTT - Message Queuing Telemetry Protocol

When you connect your device (and any associated devices) to the internet, the following device and operating data (device ID/identifier, device IP address, device time, configuration settings, hardware and software information, device status log files, serial number) is sent automatically to

Fronius International GmbH, Froniusstraße 1, 4643 Pettenbach, Austria, telephone +43(0) 7242241-0, email: contact@fronius.com (controller)

and stored.

The processing of this device and operating data is carried out for the purpose of ensuring the operational safety of the device (time synchronization, provision of updates). This processing is therefore necessary for the functionality of the device and thus for the fulfillment of the contract (Art. 6 (1) (b) GDPR).

If you do not wish to have such data processed, you must manually disable the device's internet connection.

In addition, the device and operating data is also processed for the purpose of providing services as part of a supplementary digital service for your device (such as solar.web or similar) as soon as you have registered your device with such a digital service (identification). This data is processed to provide the requested digital services and is therefore necessary for the fulfillment of the contract (Art. 6 (1) (b) GDPR).

Furthermore, this data processing is also carried out for maintenance and support purposes and for handling customer concerns as well as in warranty and guarantee cases (only in individual cases and given connection between device and internet). In this context, the device and operating data may also be passed on to our cooperation partners (third-party providers and suppliers). The processing of this data is necessary for maintenance and support purposes or for processing warranty and guarantee cases and thus for the fulfillment of the contract (Art. 6 (1) (b) GDPR).

Device and operating data are also processed for analysis and diagnostic purposes in order to gain insights into the functionality of the devices and improve them accordingly. This data processing is based on our legitimate interest (Art. 6 (1) (f) GDPR).

We store this data for as long as it is necessary to fulfill the existing contract with you. Any storage beyond this is carried out for legal reasons or if we have a legitimate interest in doing so. For more information on data processing for the solar.web-digital service, as well as our general privacy policy and your rights as a data subject, please visit https://www.fronius.com.

Fronius International GmbH retains the copyrights of these operating instructions.

Text, illustrations, and other media correspond to the technical state of the art at the time of publication. Fronius reserves the right to make changes. If you have any suggestions for improvement or have found a mistake in this document, we would be most grateful for your comments.

(1)	Battery management system (BMS)
(2)	Battery module
(3)	Cover
(4)	Base plate

The Fronius Reserva Pro battery is a stackable battery system in which a maximum of 4 battery systems can be operated in parallel. Lithium iron phosphate (LFP) batteries are known for their high thermal and chemical stability. The multi-level safety design and intelligent safety monitoring systems ensure safe operation throughout the total life cycle of the batteries.

The Fronius Reserva Pro can be used as a backup power supply when used in combination with a Fronius inverter with backup power capability and backup power changeover with the appropriate configuration.

(1)	Battery management system (BMS)
(2)	Battery module
(3)	Cover
(4)	Base plate

The Fronius Reserva Pro battery is a stackable battery system in which a maximum of 4 battery systems can be operated in parallel. Lithium iron phosphate (LFP) batteries are known for their high thermal and chemical stability. The multi-level safety design and intelligent safety monitoring systems ensure safe operation throughout the total life cycle of the batteries.

The Fronius Reserva Pro can be used as a backup power supply when used in combination with a Fronius inverter with backup power capability and backup power changeover with the appropriate configuration.

Reserva Pro module

Reserva Pro BMS

The Fronius Reserva Pro battery is designed for storing electrical energy from photovoltaic systems. It is used to store surplus energy and release this again as necessary, in order to optimize the energy supply and maximize the self-consumption of solar energy. The battery is designed for use in private households and for small to medium-sized commercial applications.

The Fronius Reserva Pro can be used as a backup power supply in combination with a Fronius inverter with backup power capability and backup power changeover.

System owners and installers can easily monitor and analyze the PV system using Fronius Solar.web or Fronius Solar.web Premium. With the appropriate configuration, the inverter transmits system component data such as power, yield, load, and energy balance to Fronius Solar.web. More detailed information can be found at Solar.web - Monitoring & analysis.

IMPORTANT!
Appropriate installation and configuration is a prerequisite for the backup power operating mode.

(1)	The loads in the house are supplied with solar energy from the PV modules.
(2)	The loads in the house are supplied with energy from the battery if the solar energy from the PV modules is insufficient.
(3)	There is no energy available from the public grid.

(1)	PV module – inverter – load/grid/battery
(2)	Battery – inverter – load/grid*
(3)	Grid – inverter – load/battery*

* Charging the battery from the grid depends on the settings, as well as the local standards and directives.

Battery systems distinguish between different operating states. In each case, the relevant current operating state is displayed on the user interface of the inverter or in Solar.web.

All installed components in the PV system must be compatible with each other and have the necessary configuration options. The installed components must not restrict or negatively affect the functioning of the PV system.

All installed components in the PV system must be compatible with each other and have the necessary configuration options. The installed components must not restrict or negatively affect the functioning of the PV system.

All installed components in the PV system must be compatible with each other and have the necessary configuration options. The installed components must not restrict or negatively affect the functioning of the PV system.

IMPORTANT! The installation location must be chosen such that all operating controls are easily accessible and simple to operate. The battery must not be covered or installed in enclosures.

		Maximum ambient temperature: -20 °C to +50 °C
		Relative humidity: 5 to 95%
		The battery must not be installed or operated at more than 2000 m above sea level.
		The battery is suitable for indoor installation.
		The battery is suitable for installation in protected outdoor areas (e.g., under an overhanging roof).
		The battery is not suitable for unprotected installation outdoors. In order to prevent the battery from heating up as much as possible, do not expose the battery to direct sunlight. The battery is not fully waterproof and must not be immersed in water.
		Do not install the battery: Where it may be exposed to ammonia, corrosive gases, acids, or salts (e.g., vent openings for livestock stables, chemical plants, tanneries).
		Do not install the battery in: Areas where there is an increased risk of accidents from farm animals (e.g., horses, cattle, sheep, pigs) Stables or adjoining areas Storage areas for hay, straw, chaff, animal feed, and fertilizers
		Do not install the battery in: Greenhouses Storage or processing areas for fruit, vegetables, or viticulture products Areas used in the preparation of grain, green fodder, or animal feeds
		Do not install the battery close to sources of fire or near to flammable, explosive or chemical materials. Ensure a minimum distance of 2 meters from heat sources (max. 60 °C).

IMPORTANT! The installation location must be chosen such that all operating controls are easily accessible and simple to operate. The battery must not be covered or installed in enclosures.

		Maximum ambient temperature: -20 °C to +50 °C
		Relative humidity: 5 to 95%
		The battery must not be installed or operated at more than 2000 m above sea level.
		The battery is suitable for indoor installation.
		The battery is suitable for installation in protected outdoor areas (e.g., under an overhanging roof).
		The battery is not suitable for unprotected installation outdoors. In order to prevent the battery from heating up as much as possible, do not expose the battery to direct sunlight. The battery is not fully waterproof and must not be immersed in water.
		Do not install the battery: Where it may be exposed to ammonia, corrosive gases, acids, or salts (e.g., vent openings for livestock stables, chemical plants, tanneries).
		Do not install the battery in: Areas where there is an increased risk of accidents from farm animals (e.g., horses, cattle, sheep, pigs) Stables or adjoining areas Storage areas for hay, straw, chaff, animal feed, and fertilizers
		Do not install the battery in: Greenhouses Storage or processing areas for fruit, vegetables, or viticulture products Areas used in the preparation of grain, green fodder, or animal feeds
		Do not install the battery close to sources of fire or near to flammable, explosive or chemical materials. Ensure a minimum distance of 2 meters from heat sources (max. 60 °C).

IMPORTANT!
The battery system must be installed on a sufficiently load-bearing and non-combustible surface (e.g., brick or concrete wall). Installation sites for battery storage systems must be effectively ventilated to the outside if the indoor space does not guarantee sufficient ventilation.

A minimum clearance of 300 mm is recommended on the left and right sides of the battery.

For detailed information regarding the battery dimensions, see chapter Dimensions on page (→).

IMPORTANT! The cables used must comply with the requirements of EN 50618 or IEC 62930. Cables that do not comply with EN 50618 or IEC 62930 have a lower current carrying capacity and the technical specialist is responsible for ensuring appropriate cable dimensions and cable lengths.

Round copper conductors can be connected to the terminals as described below:

DC connections
Manufacturer	Ø insulation layer	Stripping length
Stäubli MC4 EVO STO 6 mm2	4.7-6.4 mm	7 mm	6 mm2	6 mm2
Stäubli MC4 EVO STO 10 mm2	6.4-8.5 mm	7 mm	10 mm2	10 mm2

PE ground conductor connection (ring cable lug)
Material	Ø bore	Torque
Copper with tin coating	4 mm	3 Nm	2.5 - 6 mm2	2.5 - 6 mm2	2.5 - 6 mm2

IMPORTANT! Allow the capacitors of the inverter to discharge.

1

Turn off the automatic circuit breaker. Set the switch position of the inverter's DC disconnector to "Off".

IMPORTANT! The battery modules are connected to one another in the battery system via a common ground connection. This ensures equipotential bonding of the battery system. An additional ground connection to the individual battery modules is neither necessary nor permitted.

IMPORTANT! The technical specialist is responsible for selecting the cable lug and screw lock.

1

Fasten the ground conductor (PE) to the ground conductor connection using the M4x10 TX20 screw supplied and a torque of 3 Nm.

IMPORTANT!
The maximum cable length between the inverter and battery is 40 m.

1

Remove the caps.

2

Select the cable cross-section according to the information in Permitted cables for the electrical connection on page (→). Strip 7 mm (0.27 inches) of insulation from the single conductors.

3

Attach the crimp contact to the individual conductors using a suitable crimping tool.

4

Push the crimp contact into the MC4 plug with an audible click.

5

Tighten the cable glands with a torque of 2.5 Nm ‑ 3 Nm.

IMPORTANT!
Full selectivity of the overcurrent protection devices is only guaranteed if they are installed correctly.

6

Push the MC4 plugs (+/-) into the DC1+/DC1- slots until they click into place.

IMPORTANT!
The maximum cable length between the inverter and the last battery system is 40 m and the maximum cable length between the battery systems is 7 m. The cable lengths between the battery systems should be as short as possible and identical cable lengths should be used in order to avoid current differences between the battery systems.

1

Remove the caps.

2

Select the cable cross-section according to the information in Permitted cables for the electrical connection on page (→). Strip 7 mm (0.27 inches) of insulation from the single conductors.

3

Attach the crimp contact to the individual conductors using a suitable crimping tool.

4

Push the crimp contact into the MC4 plug with an audible click.

5

Tighten the cable glands with a torque of 2.5 Nm ‑ 3 Nm.

IMPORTANT!
Full selectivity of the overcurrent protection devices is only guaranteed if they are installed correctly.

6

Push the MC4 plug (+/-) into the respective slot until it clicks into place.

IMPORTANT!
It is not possible to guarantee effectiveness of the cable gland and IP65 protection class for the data communication connection if the connection is not established correctly.

1

Unscrew the cap on the "Inverter" data communication connection.

2

First feed the data cable through the union nut and then through the seal and cable gland.

3

Connect the data cable to the "Inverter" data communication connection with an audible click. Fasten the union nut to the cable gland.

IMPORTANT!
The maximum cable length between the inverter and the battery is 30 m and the maximum cable length between the battery systems is 10 m.

IMPORTANT!
It is not possible to guarantee effectiveness of the cable gland and IP65 protection class for the data communication connection if the connection is not established correctly.

Overview
The terminating resistors are integrated in the Reserva Pro BMS. As such, no configuration or installation of terminating resistors on the battery is required.

1

Unscrew the caps on the "Parallel IN" and "Parallel OUT" data communication connections.

2

First feed the data cable through the union nut and then through the seal and cable gland.

3

Connect the data cables to the "Parallel IN" and "Parallel OUT" data communication connections with an audible click. Fasten the union nuts to the cable glands.

Installation without terminating resistors can lead to interference during operation of the photovoltaic system. To ensure faultless functionality, install terminating resistors according to the following overview.

For permitted cables and maximum distances for the data communication area, see chapter Permitted cables for the data communication connection on page (→).

Installation without terminating resistors can lead to interference during operation of the photovoltaic system. To ensure faultless functionality, install terminating resistors according to the following overview.

For permitted cables and maximum distances for the data communication area, see chapter Permitted cables for the data communication connection on page (→).

1

Slide the right-hand cover on the Reserva Pro BMS upwards and lift it off.

2

Loosen the 2 screws of the connection area cover with a screwdriver (TX20).
Remove the connection area cover from the device.

3

Set the "Terminal Resistor Switch" to the "OFF" position.

4

Place the cover on the connection area. Tighten the 2 screws with a screwdriver (TX20) and a torque of 3 Nm.

5

Push in the right-hand cover from above until the covers click into place.

Use appropriate mounting materials depending on the surface and pay attention to the recommendation for the screw dimensions for the L-shaped mounting bracket. A technical specialist is responsible for selecting appropriate mounting material.

Use appropriate mounting materials depending on the surface and pay attention to the recommendation for the screw dimensions for the L-shaped mounting bracket. A technical specialist is responsible for selecting appropriate mounting material.

IMPORTANT! Allow the capacitors of the inverter to discharge.

1

Turn off the automatic circuit breaker. Set the switch position of the inverter's DC disconnector to "Off".

IMPORTANT! Before starting work on the battery, all LEDs on the LED status indicator must be unlit.

2

Set the switch position of the battery's DC disconnector to "Off".

1

Fasten the ground conductor (PE) to the ground conductor connection using the M4x10 TX20 screw supplied and a torque of 3 Nm.

IMPORTANT!
Full selectivity of the overcurrent protection devices is only guaranteed if they are installed correctly.

2

Push the MC4 plugs (+/-) into the DC1+/DC1- slots until they click into place.

3

Connect the data cable to the "Inverter" data communication connection with an audible click. Fasten the union nut to the cable gland.

There is no energy available from the PV modules or from the public grid. If backup power operation or battery operation are not possible (e.g., deep discharge protection of the battery), the inverter and battery switch off.

There is no energy available from the PV modules or from the public grid. If backup power operation or battery operation are not possible (e.g., deep discharge protection of the battery), the inverter and battery switch off.

Status codes about the inactive state of the battery are displayed on the user interface of the inverter. A notification via e-mail can be activated in Fronius Solar.web.

As soon as energy is available again, the inverter and the battery will start operation automatically. If the battery has switched off to protect against deep discharge for example, the battery must be started manually (dark start), see chapter Switching on the photovoltaic system on page (→).

The inverter requires a supply of energy from the battery to start backup power mode. This is established manually on the battery as described below.

1

Set the switch position of the battery's DC disconnector to "On".

2

Close the cover on the DC disconnector with an audible click and secure it with the screws to prevent unauthorized opening.

IMPORTANT! Settings in the Device Configuration menu item may only be entered by staff trained to do so!

To access the Device Configuration menu item, you must log in with user “Technician” and the technician password.

IMPORTANT! Settings in the Device Configuration menu item may only be entered by staff trained to do so!

To access the Device Configuration menu item, you must log in with user “Technician” and the technician password.

The Fronius Solar.start app is required for commissioning. Depending on the mobile device used to perform the installation, the app is available on the relevant platform.

1Download and install the Fronius Solar.start app.

2Open the access point on the inverter by touching the sensor    .

✓Communication LED flashes blue.

3Open the Fronius Solar.start app and scan the QR code on the rating plate of the inverter using a smartphone or tablet to connect to the inverter.

4Add the battery as in chapter Adding a battery in the user interface of the inverter on page (→).

The network wizard and product setup can be performed independently. A network connection is required for the Fronius Solar.web installation wizard.

WiFi:

1Open the access point on the inverter by touching the sensor    .

✓Communications LED flashes blue.

2Establish the connection to the inverter in the network settings (the inverter is displayed with the name “FRONIUS_” and the serial number of the device).

3Enter the password from the inverter’s rating plate and confirm.
IMPORTANT!
To enter the password in Windows 10, first select the Connect using a security key instead link to be able to establish the connection with the password.

4Enter the IP address 192.168.250.181 in the address bar of the browser and confirm to connect to the inverter.

5Add the battery as in chapter Adding a battery in the user interface of the inverter on page (→).

The network wizard and product setup can be performed independently. A network connection is required for the Fronius Solar.web installation wizard.

Ethernet:

1Establish a connection to the inverter (LAN1) using a network cable (min. CAT5 STP).

2Open the access point on the inverter by touching the sensor    .

✓Communications LED flashes blue.

3Enter the IP address 169.254.0.180 in the address bar of the browser and confirm to connect to the inverter.

4Add the battery as in chapter Adding a battery in the user interface of the inverter on page (→).

The network wizard and product setup can be performed independently. A network connection is required for the Fronius Solar.web installation wizard.

Obsolete firmware/software versions may lead to incompatibilities between the inverter and the battery. In this case, the following steps are to be performed:

All available updates are provided on the product page and in the "Fronius Download Search" area at www.fronius.com .

IMPORTANT! Before starting work on the battery, all LEDs on the LED status indicator must be unlit.

5

Set the switch position of the battery's DC disconnector to "Off".

IMPORTANT! Before starting work on the battery, all LEDs on the LED status indicator must be unlit.

6

Set the switch position of the battery's DC disconnector to "Off".

Wipe the device, if necessary, with a damp cloth.
Do not use cleaning agents, scouring agents, solvents, or similar products to clean the device.

Wipe the device, if necessary, with a damp cloth.
Do not use cleaning agents, scouring agents, solvents, or similar products to clean the device.

Wipe the device, if necessary, with a damp cloth.
Do not use cleaning agents, scouring agents, solvents, or similar products to clean the device.

The device is maintenance-free. Service work may only be carried out by qualified technical personnel.

Forced re-charging to protect against deep discharge takes place automatically using solar energy or energy from the grid if the battery's state of charge (SoC) falls below the minimum level and the requirements are met.

Start forced re-charging if the battery has switched off automatically to protect against deep discharge, see chapter Switching on the photovoltaic system on page (→).

Used equipment and batteries must be returned to the distributor or an authorized local collection system. Do not dispose of batteries with domestic waste. Protect batteries from high temperatures, direct sunlight, moisture and corrosive environments.

Arrange for the safe collection and proper disposal of damaged, leaking or used batteries by a battery recycling company or the Fronius Service Partner.

In addition, it should be noted that batteries contain substances that, if disposed of improperly, can have a significant negative impact on the environment as well as on human health and the safety of persons, in particular due to the leakage of hazardous substances such as heavy metals or electrolytes, which can contaminate soil, water and air.

Detailed warranty conditions specific to your country can be found at https://www.fronius.com/en/download-center?searchword=Warranty+conditions .

If there is a warranty for the relevant product, register the product at https://warranty.fronius.com/ and activate or extend the warranty.

Detailed warranty conditions specific to your country can be found at https://www.fronius.com/en/download-center?searchword=Warranty+conditions .

If there is a warranty for the relevant product, register the product at https://warranty.fronius.com/ and activate or extend the warranty.