Volt Polska Sinus Pro Ultra Plus 3000 12/230V Solar Inverter

About This Manual

Purpose

This manual describes the assembly, installation, operation, and troubleshooting of this unit. Please read this manual carefully before installations and operations. Keep this manual for future reference.

Scope

This manual provides safety and installation guidelines as well as information on tools and wiring.

Safety Instructions

WARNING: This chapter contains important safety and operating instructions. Read and keep this manual for future reference.

1. Before using the unit, read all instructions and cautionary markings on the unit, the batteries, and all appropriate sections of this manual.
2. CAUTION --To reduce risk of injury, charge only deep-cycle lead acid type rechargeable batteries. Other types of batteries may burst, causing personal injury and damage.
3. Do not disassemble the unit. Take it to a qualified service center when service or repair is required. Incorrect re-assembly may result in a risk of electric shock or fire.
4. To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning. Turning off the unit will not reduce this risk.
5. CAUTION – Only qualified personnel can install this device with battery.
6. NEVER charge a frozen battery.
7. For optimum operation of this inverter/charger, please follow required specs to select appropriate cable size. It's very important to correctly operate this inverter/charger.
8. Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please refer to INSTALLATION section of this manual for the details.
10. Fuse is provided as over-current protection for the battery supply.
11. GROUNDING INSTRUCTIONS -This inverter/charger should be connected to a permanent grounded wiring system. Be sure to comply with local requirements and regulations to install this inverter.
12. NEVER cause AC output and DC input to short circuit. Do NOT connect to the mains when DC input short circuits.
13. Warning!! Only qualified service persons are able to service this device. If errors still persist after following the troubleshooting table, please send this inverter/charger back to the local dealer or service center for maintenance.

Product Overview

The inverter features the following components:

• 1. LCD display
• 2. Status indicator
• 3. Charging indicator
• 4. Fault indicator
• 5. Function buttons
• 6. Grounding terminal
• 7. AC input terminal
• 8. AC output terminal
• 9. Battery input terminal
• 10. PV input terminal
• 11. WIFI communication port
• 12. Power on/off switch

Diagrams illustrating the unit's front, side, and rear views with labeled components are provided.

Installation

Unpacking and Inspection

Before installation, please inspect the unit. Ensure that nothing inside the package is damaged. The package should contain:

• The unit x 1
• User manual x 1
• AC terminal (red x 2 / black x 2)
• PV terminal (red x 1 / black x 1)

Preparation

Before connecting any wiring, remove the bottom cover by unscrewing three screws.

Mounting the Unit

Consider the following points before selecting the installation location:

• Do not mount the inverter on flammable construction materials.
• Mount on a solid surface.
• Install the inverter at eye level to ensure the LCD display is always readable.
• The ambient temperature should be between 0°C and 55°C for optimal operation.
• The recommended installation position is vertically against a wall.
• Ensure sufficient space for heat dissipation and wire access as shown in the diagram (20cm clearance on sides, 50cm above and below).

SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.

Battery Connection

CAUTION: For safe operation and regulatory compliance, install a separate DC over-current protector or disconnect device between the battery and inverter. Refer to the table for typical amperage requirements for fuse or breaker size.

WARNING! All wiring must be performed by a qualified personnel.

WARNING! It's very important for system safety and efficient operation to use appropriate cables for battery connection. To reduce risk of injury, use the proper recommended cable, stripping length (L2), and tinning length (L1) as detailed below.

Please follow below steps to implement battery connection:

1. Remove insulation sleeve 18 mm for positive and negative cables based on recommended stripping length.
2. Connect all battery packs as units require. It's suggested to use recommended battery capacity.
3. Insert battery cable flatly into the battery connector of the inverter and ensure the bolts are tightened with a torque of 2-3 Nm. Make sure polarity is correct at both the battery and the inverter/charger, and that battery cables are tightly screwed to the battery connector.

Diagrams show the battery connection for 12V, 24V, and 48V models.

WARNING: Shock Hazard Installation must be performed with care due to high battery voltage in series.

CAUTION!! Do not place anything between the flat part of the inverter terminal, otherwise, overheating may occur.

CAUTION!! Do not apply anti-oxidant substance on the terminals before terminals are connected tightly.

CAUTION!! Before making the final DC connection or closing the DC breaker/disconnector, be sure positive (+) is connected to positive (+) and negative (-) is connected to negative (-).

AC Input/Output Connection

CAUTION!! Before connecting to the AC input power source, install a separate AC breaker between the inverter and the AC input power source. This will ensure the inverter can be securely disconnected during maintenance and fully protected from over-current of AC input. The recommended spec of the AC breaker is 50A.

CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-connect input and output connectors.

WARNING! All wiring must be performed by a qualified personnel.

WARNING! It's very important for system safety and efficient operation to use appropriate cable for AC input connection. To reduce risk of injury, please use the proper recommended cable size as below.

Please follow below steps to implement AC input/output connection:

1. Before making AC input/output connection, be sure to open the DC protector or disconnector first.
2. Remove insulation sleeve 10mm for six conductors. Shorten phase L and neutral conductor N by 3 mm.
3. Insert AC input wires according to polarities indicated on the terminal block and tighten the terminal screws. Be sure to connect the PE protective conductor [~] first.
4. Then, insert AC output wires according to polarities indicated on the terminal block and tighten the terminal screws. Be sure to connect the PE protective conductor [~] first.
5. Make sure the wires are securely connected.

CAUTION: Important Be sure to connect AC wires with correct polarity. If L and N wires are connected reversely, it may cause utility short-circuited when these inverters are worked in parallel operation.

CAUTION: Appliances such as air conditioners require at least 2~3 minutes to restart because they need enough time to balance refrigerant gas inside their circuits. If a power shortage occurs and recovers in a short time, it will cause damage to your connected appliances. To prevent this kind of damage, please check the air conditioner manufacturer if it's equipped with a time-delay function before installation. Otherwise, this inverter/charger may trigger an overload fault and cut off output to protect your appliance, but this can sometimes still cause internal damage to the air conditioner.

PV Connection

CAUTION: Before connecting to PV modules, please install a separate DC circuit breaker between the inverter and PV modules.

WARNING! All wiring must be performed by a qualified personnel.

WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV module connection. To reduce risk of injury, please use the proper recommended cable size as below.

PV Module Selection

When selecting proper PV modules, please consider the following parameters:

1. Open circuit Voltage (Voc) of PV modules should not exceed the maximum PV array open circuit voltage of the inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than the minimum battery voltage.

Solar Charging Mode

The following tables provide recommended module configurations for 450Wp and 550Wp PV modules, considering the parameters above.

PV Module Wire Connection

Please follow below steps to implement PV module connection:

1. Remove insulation sleeve 10 mm for positive and negative conductors.
2. Check correct polarity of connection cable from PV modules and PV input connectors. Then, connect positive pole (+) of connection cable to positive pole (+) of PV input connector. Connect negative pole (-) of connection cable to negative pole (-) of PV input connector.
3. Make sure the wires are securely connected.

Final Assembly

After connecting all wirings, put the bottom cover back by screwing two screws as shown below.

The AC output of the inverter is used to directly supply power to the connected devices in the so-called island system. It is forbidden to connect the AC output to the existing electrical system (even through differential current protection), especially to the phase, neutral N, and differential current wires. Such a connection may result in reverse voltage applied to the inverter output. Damage caused by such connection will result in loss of warranty.

If interference from the mains occurs at the 230V AC input during PSU operation, the PSU will switch to battery operation (BATTERY MODE) for the duration of such interference in order to filter out the interference. After detecting a voltage without interference at the 230V AC input, the power supply will switch back to mains operation (NORMAL WORKING). This situation may occur several times in a short time interval (e.g., 4-5 times switching within 10 seconds). This is due to an incorrect parameter of the power supply network in the form of a 50Hz frequency imbalance or an incorrect sine wave. The main reason may be heat pumps or on-grid photovoltaics plugged into the same power line (off the customer's grid). This is normal behavior of the inverter and does not in any way adversely affect the operation of the power supply itself and the devices connected to it.

Operation

Power ON/OFF

Once the unit has been properly installed and the batteries are connected, simply press the On/Off switch (located on the bottom of the case) to turn on the unit.

Operation and Display Panel

The operation and display panel is on the front panel of the inverter. It includes three indicators, four function keys, and an LCD display, indicating the operating status and input/output power information.

LED Indicator:

Function Keys:

LCD Setting

After pressing and holding the ENTER button for 3 seconds, the unit will enter setting mode. Press “UP” or “DOWN” to select setting programs. Then, press “ENTER” to confirm the selection or ESC to exit.

Setting Programs:

Battery Equalization

The equalization function is added to the charge controller. It reverses the buildup of negative chemical effects like stratification, a condition where acid concentration is greater at the bottom of the battery than at the top. Equalization also helps to remove sulfate crystals that might have built up on the plates. If left unchecked, this condition, called sulfation, will reduce the overall capacity of the battery. Therefore, it's recommended to equalize the battery periodically.

How to Apply Equalization Function

You must enable the battery equalization function in monitoring LCD setting program 33 first. Then, you may apply this function by either one of the following methods:

1. Setting equalization interval in program 37.
2. Active equalization immediately in program 39.

When to Equalize

In float stage, when the setting equalization interval (battery equalization cycle) is arrived, or equalization is active immediately, the controller will start to enter the Equalize stage.

Diagrams illustrate the charging stages: BULK, ABSORPTION, FLOAT, and EQUALIZE, showing voltage and time relationships.

In the Equalize stage, the controller will supply power to charge the battery as much as possible until the battery voltage rises to the battery equalization voltage. Then, constant-voltage regulation is applied to maintain the battery voltage at the battery equalization voltage. The battery will remain in the Equalize stage until the setting battery equalized time is arrived.

However, in the Equalize stage, when the battery equalized time is expired and the battery voltage doesn't rise to the battery equalization voltage point, the charge controller will extend the battery equalized time until the battery voltage achieves the battery equalization voltage. If the battery voltage is still lower than the battery equalization voltage when the battery equalized timeout setting is over, the charge controller will stop equalization and return to the float stage.

Setting for Lithium Battery

Setting for lithium battery without communication

This suggestion is used for lithium battery application and to avoid lithium battery BMS protection without communication. Please finish the setting as follows:

1. Before starting setting, you must get the battery BMS specification:
   A. Max charging voltage
   B. Max charging current
   C. Discharging protection voltage
2. Set battery type as "LIB"

3. Set C.V voltage as Max charging voltage of BMS-0.5V.
4. Set floating charging voltage as C.V voltage.
5. Set Low DC cut-off voltage ≥ discharging protection voltage of BMS+2V.
6. Set Max charging current which must be less than the Max charging current of BMS.
7. Setting voltage point back to utility source when selecting “SBU priority” or “Solar first” in program 01. The setting value must be ≥ Low DC cut-off voltage+1V, or else the inverter will have a warning as battery voltage low.

Remark:
1. It's better to finish setting without turning on the inverter (just let the LCD show, no output).
2. When you finish setting, please restart the inverter.

Fault Reference Code

Warning Indicator

Specifications

Table 1 Line Mode Specifications

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INVERTER MODEL	1.5KW	1.5KW	2.5KW	3.5KW	5.5KW
Input Voltage Waveform	Sinusoidal (Utility or Generator)
Nominal Input Voltage	230Vac
Low Loss Voltage	170Vac±7V (UPS) 90Vac±7V (Appliances)
Low Loss Return Voltage	180Vac±7V (UPS); 100Vac±7V (Appliances)
High Loss Voltage	280Vac±7V
High Loss Return Voltage	270Vac±7V
Max AC Input Voltage	300Vac
Nominal Input Frequency	50Hz / 60Hz (Auto detection)
Low Loss Frequency	40±1Hz
Low Loss Return Frequency	42±1Hz
High Loss Frequency	65±1Hz
High Loss Return Frequency	63±1Hz
Output Short Circuit Protection	Battery mode: Electronic Circuits
Efficiency (Line Mode)	>95% (Rated R load, Battery full charged )
Transfer Time	10ms typical (UPS); 20ms typical (Appliances)
Output power derating: When AC input voltage drops to 95V or 170V depending on models, the output power will be derated.

References

• Balancer.it - Home Page
• Zasilanie awaryjne, akumulatory, przetwornice | VOLT Polska

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