1-Phase String Inverter 3~4kW - aleopower.com

Transformer Series

Dry-type/Oil Immersed Transformer

ALEO offers both dry-type and oil-immersed power transformers, where the dry-type variants provide oil-free, fire-resistant, and low-maintenance operation ideal for indoor and sensitive environments, while the oil-immersed models deliver high-capacity, cost-effective, and reliable performance for outdoor and heavy-duty grid applications worldwide.

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Switchgear

ALEO supplies a full range of metal-clad withdrawable switchgear for 400V to 40.5kV systems, designed with robust construction, precise interlocking mechanisms, and a wide operating range up to 4000A and 3500m altitude to provide reliable control, protection, and monitoring across diverse applications from data centers to industrial plants.

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ALEO’s diesel generators provide reliable and efficient backup power with durable engines designed for fuel economy and low emissions, ensuring continuous operation in critical applications such as data centers, hospitals, industrial sites, remote locations, and emergency facilities.

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ALEO’s gas generators offer clean and efficient power generation using natural gas or biogas, featuring low emissions, reliable performance, and flexible operation for both prime and standby applications in commercial, industrial, and distributed energy projects.

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ALEO’s wind turbines efficiently convert wind energy into electricity through aerodynamically designed blades and a robust generator system, featuring high reliability and adaptability for various wind conditions, and are widely used in onshore/offshore wind farms and distributed power generation projects.

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Energy Storage System

ESS is a key infrastructure for the new power system, enabling the spatial and temporal transfer of electricity through physical or chemical means to resolve supply-demand imbalances across generation, grid, and consumption sides, particularly for integrating high shares of renewable energy.

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PV Module

ALEO’s photovoltaic modules convert sunlight into DC power through the photovoltaic effect, utilizing durable laminated structures with silicon-based cells and aluminum alloy frames, and are designed for diverse applications from building integration and small electronics to grid-connected power systems.

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Inverter

ALEO’s pv inverters convert solar panel DC into grid-frequency AC for grid-tied or off-grid use, featuring MPPT and anti-islanding protection, and are widely used in utility-scale plants, distributed commercial/ residential systems, and off-grid setups, with main types including centralized, string, micro, and hybrid storage inverters.

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Complete Cabinet Series

Active/Passive Power Filter

ALEO provides both active and passive harmonic filter cabinets, with the active filters utilizing real-time detection and IGBT inversion for dynamic harmonic cancellation, while the passive filters employ optimized capacitor and reactor banks for cost-effective power factor correction and stable waveform improvement.

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UPS

ALEO’s UPS (Uninterruptible Power Supply) provide uninterrupted and stable AC power by conditioning the utility supply and charging internal batteries during normal operation, then instantly switching to battery-backed inverter output during outages to protect critical equipment from power interruptions and voltage irregularities.

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Power Quality & Protection Equipment

This category features devices like multifunctional power meters, low-voltage filter reactors, AC self-healing capacitors, and microcomputer protection relays, designed to monitor, enhance, and protect electrical systems by improving power quality, mitigating harmonics, and ensuring reliability across industrial and commercial applications.

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1-Phase String Inverter 3~4kW

1-Phase String Inverter 3~4kW

Main application fields: utility-scale power plants, distributed commercial/industrial and residential systems, off-grid/microgrid installations, and integrated solar-plus-storage applications, which are the core domains for photovoltaic inverters internationally.

Category Inverter

Description

Description

Product Describtion

PV string inverters convert the direct current (DC) generated by solar panel strings into alternating current (AC) that can be fed into the electrical grids, which are commonly used in homes and businesses, including rooftops, carports, ground mounts, and tracker systems.

Our string inverters have power ratings ranging from 2kW to 352 kW, equipped with the advantages of easier troubleshoot and lower cost. With advanced technology and reliable performance, our solar string inverters will maximize your PV system’s efficiency, making it a cost-effective and sustainable choice for your home or business.

The inverter is a transformerless 1-phase PV grid-connected inverter. As an integral component in the PV power system, the inverter is designed to convert the direct current power generated from the PV modules into grid-compatible AC current and feeds the AC current to the utility grid.

The inverter must only be operated with PV strings with class II protection in accordance with IEC 61730, application class A. It is not allowed for the positive pole or the negative pole of the PV strings to be grounded. This can cause damage to the inverter.
• Do not connect any local load between the inverter and the AC circuit breaker.

The PV modules in the system must comply with the IEC 61730-1 (2016) class Ⅱ standard. The intended usage of the inverter is illustrated in the following figure.

Item	Description	Note
A	PV strings	Compatible with monocrystalline silicon, polycrystalline silicon, and thin-film modules without grounding.
B	Inverter	SG2.0RS-S, SG2.5RS-S, SG3.0RS-S, SG3.0RS, SG3.6RS, SG4.0RS, SG5.0RS, SG6.0RS.
C	Metering device	Meter cupboard with power distribution system.
D	Utility grid	TT，TN-C，TN-S, TN-C-S.
E	Loads	House loads that consume electricity.
F	Optimizer	/

To meet the demand of users in different regions, connection to a split-phase grid system is supported for this inverter. Grounding detection function will not be available when the inverter is used in the split-phase grid system.

Categories

Active/Passive Power Filter

Energy Storage System

Diesel Generator

Electric Vehicle Charging Infrastructure

Power Quality & Protection Equipment

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FAQ

How do I choose the right transformer for my project?

To select a suitable transformer, key information such as rated capacity, primary and secondary voltage, frequency, installation environment, and local grid requirements is required.
If technical details are not fully defined, selection can be based on the application and operating conditions.

What is the difference between oil-immersed and dry-type transformers?

Oil-immersed transformers provide better heat dissipation and overload capability, making them suitable for outdoor and industrial applications.
Dry-type transformers are safer for indoor use, require less maintenance, and are commonly used in commercial buildings and data centers.

Can the transformers operate continuously at full load?

Yes. The transformers are designed for continuous 24/7 operation at rated load under normal operating conditions, making them suitable for critical power applications.

What voltage levels and capacities are available?

Transformers are available for low, medium, and high voltage applications.
Typical voltage levels include 400V, 690V, 6kV, 10kV, 11kV, 22kV, and 33kV, with various capacity options depending on project requirements.

Which international standards do the products comply with?

Products are designed and manufactured in accordance with international standards such as IEC, IEEE, and ANSI, and can be customized to meet local grid standards.

Are the products suitable for data centers and AI facilities?

Yes. The equipment is suitable for data centers and AI facilities, where stable power supply, continuous operation, and high reliability are required.

Can the equipment operate in high temperature or high humidity environments?

Yes. Designs can be adapted for high temperature and high humidity environments through appropriate insulation, cooling, and protection measures.

How long is the typical production lead time?

Production lead time depends on the product type and level of customization.
Standard models usually have shorter lead times, while customized solutions require additional manufacturing time.

Project Ordering Process

1. Inquiry & Requirement Confirmation

We begin by discussing your project specifications, application needs, and any existing technical documents.

2. Technical Data & Drawing Submission

You share detailed electrical parameters, site layouts, schematics, or conceptual drawings for our review.

3. Engineering Review & Solution Design

Our engineering team analyzes your data and designs a customized system, ensuring compliance with standards and project goals.

4. Quotation & Commercial Proposal

We provide a detailed offer including technical specifications, pricing, delivery schedule, and terms.

5. Order Confirmation & Contract Finalization

Upon agreement, we finalize the order and sign the contract to officially launch the project.

6. Pre-production Planning & Approval

We prepare manufacturing drawings and documents for your final approval before production begins.

7. Production & Quality Inspection

Manufacturing proceeds under strict quality control, with optional inspections available at key stages.

8. Testing & Certification

All products undergo rigorous performance and safety tests, with certifications provided as required.

9. Packing & Shipment

Equipment is securely packed and shipped according to agreed logistics terms.

10. Delivery & On-site Handover

We ensure safe arrival of goods and provide necessary documentation for customs and installation.

11. Installation Supervision & Commissioning

Our engineering team can provide on-site installation supervision, commissioning, and startup assistance.

12. Project Close-out & Follow-up

We complete final documentation, provide training if needed, and maintain ongoing technical support.

HOW CAN WE HELP?

We respond to your needs first

Our Location

Huafei Road 9, Qianqiao,Huishan District, WuxiCity,China

Office Hour

Mon-Sun : 8am-6pm
6pm-7am customer service online

Email Address

alan@aleopower.com

Phone Number

86-18661056678(Jett)

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We look forward to saving you decision-making time and establishing transparent and trusting long-term cooperation!