Product Overview

The 8.2kW Pure Sine Wave Off-Grid Hybrid Solar Inverter with MPPT brings solar charging, battery charging, AC conversion, and backup AC input into one unit. It is intended for single-phase solar systems that require flexible access to photovoltaic power, battery storage, utility power, or a compatible generator.

Pure sine wave output supports the normal operation of household appliances, office equipment, lighting, refrigeration, and other AC loads within the inverter’s rated continuous and starting capacity. The unit can also operate without a battery when available PV power and the selected working mode can support the connected loads.

Built-in MPPT charging, dual-load outputs, and optional remote monitoring give installers more control over how solar energy is collected, stored, and supplied.

Key Features

Pure Sine Wave Output

The inverter produces pure sine wave AC power with an output power factor of 1.0. This output format is suitable for a wide range of conventional appliances and electronic equipment, provided that both continuous power and startup demand remain within the inverter’s limits.

Integrated MPPT Charging

The built-in MPPT charge controller tracks the operating point of the PV array and manages solar charging without requiring a separate external solar controller. The published maximum PV input voltage is 500VDC; final string design must follow the confirmed datasheet and the open-circuit voltage of the selected modules.

Battery-Free Operation

Where sufficient solar input is available, the inverter can supply connected loads without an installed battery. This option may suit daytime loads or projects where battery storage will be added later. Output stability will still depend on PV conditions and the configured backup source.

Dual-Output Design

Two load outputs allow an installer to separate priority loads from lower-priority circuits. For example, lighting, communication equipment, and refrigeration can be placed on the main output, while less critical loads use the secondary output.

The two outputs do not provide two independent 8.2kW power sources. Total connected demand must remain within the inverter’s confirmed load limits.

Multiple Power Sources

The inverter can work with solar panels, battery storage, utility power, or a compatible generator. This allows the system designer to select an operating strategy based on local grid conditions, solar availability, backup requirements, and battery capacity.

Technical Specifications

Solar and Backup Power Management

The inverter acts as the power-management point between the PV array, battery bank, AC backup source, and connected loads.

During periods of sufficient sunlight, PV energy can be used for load supply and battery charging according to the selected settings. When solar production falls, stored battery energy or the configured AC source can support the loads.

Utility or generator input can also provide battery charging when solar energy is insufficient. Input voltage, frequency, grounding arrangement, and generator waveform must comply with the final inverter specification.

Operating priorities should be configured during commissioning. An installer should base these settings on:

• The daily load profile

• Available PV power

• Battery capacity and charge limits

• Generator operating strategy

• Required backup duration

• Critical and non-critical load groups

This approach avoids relying on one default setting for projects with different energy requirements.

Dual-Output Load Management

Dual outputs provide a practical way to separate essential and discretionary loads.

Main Load Output

The main output can be assigned to circuits that should remain available for as long as the system has sufficient solar, battery, or backup AC power.

Typical examples include:

• Lighting and communication equipment

• Refrigerators and freezers

• Security and monitoring systems

• Computers and network devices

• Selected household or office circuits

Secondary Load Output

The secondary output can be used for loads that may be disconnected earlier when battery voltage or available power falls below the configured threshold.

Possible loads include:

• Non-essential sockets

• Auxiliary lighting

• Selected workshop equipment

• Water heating or other discretionary loads

Actual cut-off and return conditions must be set according to the confirmed manual. Load allocation should account for both running power and startup current.

Monitoring and Communication

WiFi and GPRS connectivity are available for iOS and Android monitoring. The Solarman platform can be used to review system status, operating mode, and energy information when the correct communication module is installed.

Published communication interfaces include:

• RS232

• RS485

• WiFi

• GPRS

• Lithium battery communication interface

The communication port does not automatically guarantee compatibility with every lithium battery. Before ordering, provide the battery brand, model, voltage, BMS protocol, and communication cable definition for verification.

WiFi or GPRS hardware may be supplied as an option depending on the order configuration. Confirm the included accessories in the quotation.

Application Scenarios

Off-Grid Homes

The inverter can form the control center of an off-grid residential system, combining solar generation, battery storage, and generator or utility backup. Household circuits must be selected according to the inverter’s continuous and surge capacity.

Shops and Small Offices

Pure sine wave output makes the unit suitable for lighting, computers, network devices, point-of-sale equipment, refrigeration, and other routine business loads. A load assessment is still required before connecting air conditioners, pumps, or compressors.

Farms and Remote Sites

The inverter can support remote buildings, farm offices, monitoring equipment, lighting, refrigeration, and other distributed loads where grid power is unavailable or unstable.

Motor-driven equipment should be checked separately because startup current can be considerably higher than its rated running power.

Light-Commercial Systems

Installers may use the unit in small workshops, service locations, telecom rooms, and other light-commercial applications. It is not a substitute for a three-phase industrial inverter, and suitability should be confirmed when the load includes large motors or continuous high-power machinery.

System Matching and Installation

Calculate Continuous and Starting Loads

Add the rated power of loads that may run at the same time. Pumps, compressors, refrigerators, air conditioners, and motors may require substantially more power during startup. Their surge demand must be checked against the confirmed inverter specification.

Check the PV String Voltage

Calculate the array’s open-circuit voltage at the lowest expected site temperature. The result must remain below the inverter’s confirmed maximum PV voltage.

The normal operating voltage of the array should also remain inside the MPPT range. Staying below the absolute maximum voltage alone is not sufficient for correct MPPT operation.

Verify Battery and BMS Compatibility

Confirm battery voltage, maximum charge current, discharge current, BMS protocol, and communication cable pinout. A physical RS485 connection does not guarantee that two devices use the same protocol.

Select the Required Protection

The final installation should include correctly rated DC and AC isolators, overcurrent protection, surge protection, earthing, and cable sizes appropriate for local regulations and installation conditions.

Use Qualified Installation Personnel

Installation, parameter setup, and commissioning should be completed by a qualified solar or electrical technician. The inverter must be isolated from PV, battery, utility, and generator sources before wiring or maintenance work begins.

Quality Control and Technical Support

IFIND maintains an ISO 9001 quality management system and reports CE certification and a BV field certification completed in 2024. Product-level certificates, model-specific test reports, manuals, and warranty terms can be supplied for project review.

According to IFIND’s quality-control information, inverter units are assembled and tested before packing and shipment. Technical support is available for parameter configuration, system matching, and application troubleshooting.

For stronger EEAT signals, the published page should also include:

• A downloadable 8.2kW datasheet

• The matching installation manual

• A model-specific CE document

• A battery compatibility list

• A document revision date

• “Reviewed by IFIND Applications Engineering” after technical approval

FAQs

What size solar array can be connected to this inverter?

PV array size depends on the inverter’s confirmed maximum PV power, maximum open-circuit voltage, MPPT range, and input-current limit. Module Voc must also be corrected for the lowest expected site temperature. Send the panel datasheet and planned series/parallel arrangement to IFIND for verification.

Can the inverter operate without a battery?

Yes, the product is designed to support battery-free operation when PV input and the selected working mode can supply the connected load. A battery or AC backup source is recommended where uninterrupted output is required during clouds, nighttime, or rapid load changes.

Which lithium batteries are compatible?

Compatibility depends on the battery voltage, charge limits, BMS protocol, and cable pinout. Provide the battery brand and exact model before ordering. The presence of an RS485 port alone does not confirm protocol compatibility.

Can it power air conditioners, refrigerators, or water pumps?

These loads may be supported if their combined running and startup demand remains within the inverter’s confirmed ratings. Compressor and motor startup current must be checked separately; appliance nameplate power alone may not be sufficient for system sizing.

Can a generator be used as the AC backup source?

A compatible generator can be connected when its voltage, frequency, grounding arrangement, and waveform meet the inverter’s AC input requirements. Generator capacity should cover the active loads and any simultaneous battery charging demand.

Do both load outputs provide 8.2kW?

No. The two outputs are intended for load grouping, not for doubling the inverter’s power. The combined load must remain within the inverter’s rated capacity, and the secondary output may have a lower limit or configurable cut-off condition.

Is WiFi or GPRS monitoring included?

WiFi and GPRS are listed as available monitoring options. Confirm whether the required module is included in the selected configuration and whether the Solarman platform is supported in the destination market.

Can the inverter be installed outdoors?

Outdoor suitability depends on the confirmed enclosure protection rating and the installation manual. Until the IP rating is verified, install the unit in a dry, ventilated location protected from direct rain, standing water, dust accumulation, and prolonged direct sunlight.