PRODUCT MANUAL

ECO SOLAR BOOST FOR HEATING WATER, BOILER

GREEN BOOST PRO 4000 SINUS BYPASS

Version: 2025-08-21

Introduction

Congratulations on choosing a VOLT device! This manual is an integral part of the device and contains important information on safety, operation, and disposal. Before using the device, please read all safety and operating instructions carefully. Keep this manual in a safe place for future reference. Use the device only as intended and in accordance with the instructions provided in this manual. If you pass the device on to another person, make sure that this manual is also included.

Installation: The device must be installed by a qualified electrician with SEP electrical qualifications and OZE photovoltaic installer qualifications issued by UDT. Alternatively, the installer must have equivalent qualifications in the country where the device is being installed.

VOLT POLSKA is not liable for any accidents or damage resulting from the use of the equipment in a manner not in accordance with the instructions described in this manual. This manual is subject to change.

The latest version of the manual is always available on the website www.voltpolska.pl.

The Green Boost PRO 4000 SINUS BYPASS (DC 160-500VDC) is designed for water heating, boilers, underfloor heating, and more.

Technical Specifications

Solar Inverter GREEN BOOST PRO 4000 SINUS BYPASS
Parameter	Value
Max constant power	4000W
Output voltage	70-245 VAC / 50Hz
Output voltage Voc from panels PV	from 160 to 500VDC
Max PV panel power	≤ 4000W
Max Imp current from PV	10A
Output voltage waveform	Pure sine
Connection of PV panels	series
Output socket	2 pcs
Mode	MPPT / STABLE
Display	LED
Overload protection	YES
Short circuit protection	YES
Thermal protection	YES 100±10°C
Cooling	active fans
Warning system	Sounds and lights signals
Operating temperature	from -25 to +55°C
Storage temperature	from -20 to +55°C
IP Class	IP 20
Dimensions	311x232x140mm (with MC-4)
Weight	4.7kg

Application and Key Features

The GREEN BOOST PRO 4000 SINUS BYPASS is designed to power heating devices using both PV solar panels and the utility grid.

Key Features

Multifunctionality (BYPASS): The inverter can be connected to both solar panels and the utility grid.
Pure Sine Wave Output: The inverter generates a pure sine wave output, making it suitable for powering inductive devices such as power tools, air conditioners, refrigerators, freezers, and more.

Operating Principle

The solar inverter converts the direct current (DC) power generated by solar panels into alternating current (AC) power that can be used to power heating devices. The solar panels should be connected in series with a total Voc (Open circuit Voltage) of up to 500VDC and an Imp (Maximum Power Current) of 10A.

Compatible Devices

The GREEN BOOST PRO 4000 SINUS BYPASS solar inverter can power a variety of heating devices, including:

Electric boilers
Heaters
Electric heaters
Electric mats
Underfloor heating systems

Power Protection and Operating Modes

Power Protection

The GREEN BOOST PRO 4000 SINUS BYPASS solar inverter has an internal maximum power protection of 4kW. The total power of the solar panels should not exceed 4kW. Both output sockets can operate simultaneously up to 4kW (total).

Dual Device Support

The Green Boost inverter allows you to connect two heating devices, such as two boilers. Both will heat simultaneously.

Operating Modes

STABLE Mode: In STABLE mode, the output voltage is maintained at 230V AC (50Hz) as long as sufficient power is generated from the solar panels. If the power from the panels is too low, the device will not supply power to the output sockets.
MPPT Mode: In MPPT mode, the output voltage can oscillate between 70-245V AC (50Hz), allowing the device to supply power to the output sockets even at low power levels from the solar panels (low sunlight conditions).

Installation

Wiring Requirements

The DC and AC side wires and cables must be selected appropriately in accordance with the technical standards and regulations applicable in the country of installation. Particular attention should be paid to the current carrying capacity of the wires and cables and to ensure that the permissible voltage drop on the wires and cables is within the range:

a) Up to 1% for DC wires and cables*
b) Up to 3% for AC wires and cables**

These values are applicable in Poland.

The cross-section of the wires and cables should not be less than 4mm². Too thin wires will cause heating and voltage drop at the inverter input. In extreme cases, this can lead to system losses or fire.

Ventilation Requirements

Free air circulation is essential for proper inverter operation. Do not cover the ventilation openings on the housing. This can cause overheating and damage to the device. The recommended mounting method for the inverter is vertical. Secure the device to non-combustible surfaces such as concrete or metal.

Safety

WARNING: Hazardous Voltage

The solar inverter produces hazardous output voltage. Hazardous voltage is also present at the input of the device (from the PV panels).

Caution: Disconnecting the panels during operation can lead to electric shock and serious injury or death (risk of electric arc).

General Safety Precautions:

Follow all general safety guidelines for 230V devices during operation.
Even after disconnecting the power supply, high voltage may persist on the power terminals and internal components for several seconds.
Entrust any repairs to an authorized service center.
Avoid using the inverter in high humidity environments.
Do not expose the inverter to direct sunlight, fire, or flammable substances.
Shield the device from exposure to sunlight.
In case of water contact, promptly turn off the device. ?
Refrain from short-circuiting the inverter output.
Avoid connecting a load exceeding the permissible continuous load. Inverter damage may result from overloading.
In the event of a fire, utilize a fire extinguisher suitable for extinguishing electrical devices under voltage (snow/powder). ?

The AC outputs of the Green Boost inverter must not be connected to a new or existing power grid under any circumstances. The device has its own protections on the AC output side and the DC PV IN input side.

The use of residual current devices (RCDs) on the AC output may cause a malfunction of the device!!!

Connection and Operation

IMPORTANT: When connecting the panels to the inverter, pay close attention to the polarity of the power supply. Reverse connection of the wires will damage the inverter and void the warranty.

Connecting the Solar Panels:

The Green Boost inverter has cables with MC4 connectors. Connect the connectors to the existing PV installation. Connect the male connector to the negative terminal of the PV installation. Connect the female connector to the positive terminal of the PV installation.

Connecting the DC Power Cable:

The power cable from the PV installation should have a DC safety switch installed (designed for this type of installation). Connect the DC power cable to the DC input terminals on the inverter.

Connecting the Heating Device:

Connect the appropriate heating device (e.g., boiler) to the output of the inverter.

Power On and Operation:

Once voltage from the PV panels is detected, the inverter will automatically turn on. The indicator light will confirm activation.

AC Output Sockets:

The GREEN BOOST PRO 4000 SINUS BYPASS inverter has 2 E-type AC power sockets. After connecting the voltage from the PV installation (160V-500V), the inverter will check for connected devices. Both sockets can operate simultaneously (up to 4kW total).

Indicators and System Status

The inverter features various LEDs and displays to indicate its status and operating parameters. Below is a description of the indicators:

(1) SOLAR STATUS LED: Illuminates when the SOLAR mode is selected. Displays (7), (8), and (9) show information from the PV system.
(2) MAINS STATUS LED: Illuminates when the MAINS mode is selected. Displays (7) and (8) show AC grid data.
(3) OUTPUT SECONDARY LED: Lights up when the SECONDARY socket is active.
(4) SYSTEM FAULT LED: Illuminates continuously if the device operates incorrectly or a short circuit occurs. Flashes in case of overload or high PV voltage. It is not lit during correct operation. ?
(5) OVER HEAT LED: Turns on when excessive temperature is detected, activating thermal protection. ?
(6) MPPT MODE LED: Illuminates when the MPPT mode is selected using the MPPT/STABLE button.
(7) INPUT VOLTAGE Display: Shows PV input voltage in SOLAR mode, or AC input voltage in MAINS mode.
(8) OUTPUT VOLTAGE Display: Shows inverter output voltage in SOLAR mode, or mains output voltage in MAINS mode.
(9) PV CURRENT Display: Shows the current PV input current. Flashes if the load in inverter mode is too high, warning of excessive load.
(10) PV mode indicator light: Lights up when the device output is in PV operating mode. ▶️
(11) AC mode indicator light: Lights up when the device output is in AC (bypass) operating mode. ?

ATTENTION! In individual converter units, an audible signal ? and a red SYSTEM FAULT LED ? may occur in situations of high load or insufficient power from the PV panels. This is a normal phenomenon resulting from differences in the sensitivity of the measuring systems and does not indicate damage to the device.

Disposal and Warranty Information

Correct Disposal of This Product (Waste Electrical & Electronic Equipment)

The marking on the product or in related texts indicates that it is at the end of its useful life and should not be disposed of with other household wastes. To avoid harmful effects on the environment and human health as a result of uncontrolled waste disposal, please separate the product from other types of waste and ensure responsible recycling to promote the reuse of material resources as a permanent practice.

Users in households should contact the retailer where they purchased the product, or a local authority. Business users should contact their supplier and check the terms of the contract purchase. The product should not be disposed of with other commercial waste.

CE Marking: Indicates compliance with EU standards.

Recycling Symbol: ♻️ (Represents Waste Electrical and Electronic Equipment)

Warranty Service Comments

This section is intended for recording warranty service details, including:

Date of Purchase
Shipping Address
Signature / Stamp
Damage Description
Service Comments

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