Introduction
Congratulations! You are about to install and use a high-end equipment that will play a central role in the energy management of your battery-based system. The next3 is the first device of our new generation of smart battery inverter/charger with advanced functions. This next3 has been designed, manufactured, assembled and tested in our factory in Switzerland. It has a 6-year warranty and is eligible for an extension 6+6, under the studercare+ program (not yet available, check with your studer representative for further information).
[Swiss Made Assembly] ??
The studercare+ program allows to extend the warranty 6 additional years along with further features.
General Information
Exclusion of Liability
Studer disclaims all responsibility and liability for damage, costs or losses resulting from an installation that does not comply with the instructions, a faulty operation or inadequate maintenance. The use of studer equipment is in any case under the responsibility of the customer. Read carefully the safety and operation instructions. Installation must be entrusted to qualified personnel. Check the user manual online or contact support for help.
Options & Accessories
- nx3 st: next3 full option (standard)
- nx3 sti: next3 full option + interface
- nx tempSensor: next3 battery temperature sensor
- nx interface: next3 user interface
Mounting and Installation
Storage and Content
The product is shipped in packaging with dimensions approximately 800mm x 600mm x 720mm and weighs 72 kg. It can be stored within a temperature range of -20°C to 60°C.
Mounting Place
The next3 and batteries should only be installed by qualified personnel. Ensure the mounting location is suitable:
- Temperature: Suitable for indoor use.
- Ventilation: Requires adequate airflow.
- Child Safety: Keep out of reach of children.
- Sunlight: Avoid direct sunlight. ❌☀️
- Noise: Avoid excessively noisy environments. ❌?
- Weather: Protect from moisture and weather. ❌?️
Fixing and Dimensions
Diagrams show fixing points and required clearances. The device weighs 58 kg. Minimum clearances required are: 250mm (front), 150mm (left), 290mm (right), 550mm (top), 120mm (bottom), 350mm (rear). Device dimensions: Height 716mm, Width 454mm, Depth 352mm.
Wiring
Earthing
Use a minimum 16mm² earth cable, with the same section as the AC cables up to 25mm². The solar generator must be Class II insulated.
Communication and Control
- CAN BMS: For communication with Lithium batteries. Connector included.
- RS485i: Modbus communication connector included.
- Remote entries: 2 remote inputs connector included.
- nx tempSensor: Temperature sensor for lead-acid batteries.
- Communication Bus: Studer nx communication bus, uses 2x RJ45 black cables for nx interface and multi-units. Bus termination is required.
- Auxiliary Contacts: 2 auxiliary contacts (outputs) with connectors included (16A 250Vac/24Vdc, 3A 50Vdc).
Battery Connection
Use 4 x 70mm² cable (M8 terminals, torque 10Nm). Supports up to 4 x 95mm² cable (M8 terminals, torque 10Nm). A 400A protection device is required on the battery side.
Solar PV Connection (MPPT 1, MPPT 2)
Use 2.5-6mm² cable with Sunclix connector. A protection device with Overvoltage protection (SPD: 4x900Vdc, 1 per input) is required on the PV side.
AC Connection
Use up to 5 x 25mm² cable (torque 1.6Nm). Protection device AC to protect cables (circuit breaker type B). Protection device AC to protect people (RCCB/RCD, check earth scheme). Overvoltage protection SPD.
Regulations
The device must be installed in accordance with local standards and regulations in force.
Communication and Power Up
Nx Interface Requirement
An nx interface is required in the communication bus for full functionality.
Display System Status
The display system provides various status indicators:
- AC Source: Present and working, waiting for connection, input limit, phase rotation check, warning/error.
- Solar PV: Producing, night, no production for 48h, warning/error.
- AC Load: Powered 400 Vac, standby, load search, warning/error.
- Battery: Connected, low battery, warning/error.
State of Charge
Indicated in ranges: 0-25%, 25-50%, 50-75%, 75-100%.
Upper LED (not for lithium)
Indicates battery charging modes: floating, bulk, absorption, equalization.
Device Status Indicators
- Off: Device is off.
- On: Device is on, with potential warnings/errors.
- No Error: System is operating normally.
- Device Off (with warnings): Indicates low battery, overload, high temperature, or general warning/error.
Manual Button Functions
- ON/OFF: Press for 1 to 3 seconds.
- Clear error: Press and hold.
- Enable/disable buzzer: Press for 5 to 7 seconds.
- No effect: Press for more than 7 seconds.
Configuring the next
Nx Interface Navigation
The nx interface provides access to:
- User menu: Dashboard, Synoptic, Graphs, Notification center, Remote control, Update, Installation configuration, Monitoring.
- Dashboard/Synoptic: Display real-time information and configure settings.
- Installation configuration: Guided configuration is presented on the first screen during initial startup.
Multi-Units
3-phase and parallel combinations are not yet available. Future support for up to 3 units in parallel with 1 internal transfer and common battery, and multi-unit and multi-battery configurations for Li and Pb batteries is planned.
Technical Data
| Parameter | Specification |
|---|---|
| Inverter | |
| Model | nx3 16000-48 st |
| Continuous Power | 15000 VA |
| Power 30min | 16000 VA |
| Power 5sec | 30000 VA |
| AC Output Voltage | 230V Phase to Neutral / 400V Phase to Phase |
| AC Output Frequency | 50/60Hz |
| Solar | |
| Solar MPPT Inputs | 2 |
| PV Input Voltage | 100 - 900 Vdc |
| PV Input Startup Voltage | 350 Vdc |
| PV Max Current | 2 x 27 Adc |
| PV Power | 2 x 8 kW |
| Transfer | |
| Max Rated Current | 3 x 80 Aac |
| Phase to Neutral Voltage | 230 Vac |
| Phase to Phase Voltage | 400 Vac |
| Frequency | 50/60 Hz |
| Battery | |
| Nominal Voltage | 48Vdc (38-68Vdc) |
| Charge Current | 300 Adc |
| Protection | |
| IP Rating | IP30 |
| Protection Class | Class I |
Certifications: CE, RoHS Pb compliant.
Maintenance and Recycling
Except for the periodic check of the connections (tightening, general condition), the next does not require any particular maintenance. To dispose of this product, please use the service for the collection of electrical waste and observe all obligations in force in the place of purchase.
Contact and Support
Call our specialists: +41 27 205 60 80
Or visit: studer-innotec.com/support
Studer Innotec SA
rue des Casernes 57
1950 Sion, Switzerland
Email: info@studer-innotec.com
Certifications
- Certified Net Management System
- SQS ISO 9001 / ISO 14001
- Valais Excellence Certified
- Solar Impulse 1000 Efficient Solutions
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