Views: 264 Author: Dingnuo Electric Publish Time: 2026-08-23 Origin: Site
Content Menu
● Why Source Static VAR Generators from China?
● How We Selected These Manufacturers
● Top 10 Static VAR Generator Manufacturers in China
● 1. DINGNUO ELECTRIC CO., Ltd.
● 3. Shenzhen INVT Electric Co., Ltd.
● 4. FGI Science and Technology Co., Ltd.
● 5. Anhui Zhongdian Electric Co., Ltd. (ZDDQ)
● 6. Xi'an CoEpower Electric Co., Ltd.
● 7. Shanghai Yingtong Electric Co., Ltd. (YT)
● 9. Shanghai Longliyuan Electric Power Technology Co., Ltd.
● SVG Technical Requirements Buyers Should Check
● Hidden Procurement Risk: Rated kvar Is Not Always Usable kvar
● Buyer's Guide: Factory Verification and Sampling
>> Verify Certifications Properly
>> Request a Factory Acceptance Test
>> Plan Export Packaging and Logistics
● FAQ
>> 1. How can I verify that an SVG supplier's ISO certificate is still valid?
>> 2. Can an SVG completely replace a capacitor bank?
>> 3. Why do quotations for the same 100 kvar SVG differ so much?
>> 4. Is SVG suitable for factories with many VFDs?
>> 5. What can be customized in an OEM SVG project?
China has developed a broad supply chain for power-quality equipment, including IGBT-based power modules, control boards, reactors, capacitors, sheet-metal enclosures, low-voltage switchgear, and complete compensation cabinets. For procurement managers sourcing Static VAR Generators (SVGs), this creates access to competitive manufacturing costs, flexible customization, and relatively short lead times.
However, SVG performance is not determined by rated kvar alone. It depends on control algorithms, IGBT selection, thermal design, current capacity, protection logic, EMC design, factory testing, and commissioning capability. This guide is designed for professional buyers looking for long-term suppliers—not simply the lowest initial quotation.
China is one of the world's major production bases for electrical equipment, industrial automation components, power electronics, and low-voltage distribution systems. Key industrial clusters for SVG, active harmonic filters, capacitors, reactors, and related products are located in Shenzhen, Shanghai, Zhejiang, Anhui, Jiangsu, Shandong, Xi'an, and surrounding manufacturing regions.
In 2025, China's mechanical and electrical product exports reached approximately USD 2.30 trillion, up 8.4% year on year. Electrical equipment and industrial components remain an important part of the country's export structure. Statistics cited by China Energy News also indicated that China's power-equipment-related exports reached about USD 37.4 billion in 2025, growing 26% year on year.
For overseas buyers, Chinese SVG suppliers can be particularly relevant for:
- Reactive power compensation in industrial distribution systems
- Power factor correction for fluctuating loads
- Harmonic and reactive power management in factories
- PV, energy storage, EV charging, and grid-connected projects
- OEM/ODM sourcing for electrical distributors and system integrators
- Combined procurement of SVGs, APFs, capacitors, reactors, and compensation cabinets
This is not a ranking based only on company size, marketing visibility, or a single product price. The manufacturers below were selected as companies worth including in a professional supplier shortlist, based on publicly available information and buyer-relevant evaluation criteria.
| Selection Criterion | What Buyers Should Review | Why It Matters |
|---|---|---|
| Manufacturing and QC systems | Incoming inspection, aging tests, functional tests, traceability, final inspection | SVG reliability depends heavily on process consistency |
| R&D capability | Control algorithms, DSP/FPGA platforms, IGBT application experience, thermal and EMC design | These factors affect response speed, stability, and service life |
| Product coverage | SVG, APF/AHF, active load balancing, capacitor banks, reactors, STATCOM | A broader portfolio often indicates stronger project integration capability |
| Compliance documentation | CE, RoHS, IEC 61000-related test reports, ISO systems, type-test reports | Necessary for export, tendering, and project acceptance |
| Delivery capability | Component sourcing, production planning, FAT, spare parts, after-sales support | Important for project schedules and long-term service |
| OEM/ODM flexibility | Branding, nameplates, cabinet design, communication protocols, manuals, packaging | Essential for distributors, private-label brands, and integrators |
Important note: A CE mark is not, by itself, proof of product quality. Buyers should request the Declaration of Conformity, model-specific test reports, applicable directives/standards, issuing body, and report date.
The companies below are listed as potential suppliers for further qualification. Their capacity, MOQ, certification scope, and lead time can vary by voltage level, cabinet configuration, order quantity, and customization requirements. Buyers should verify all claims through current factory documents, technical agreements, and third-party audits.
| Manufacturer | Founded / Location | Main Focus | Suitable Buyer Profile | Publicly Reported Capabilities |
|---|---|---|---|---|
| DINGNUO ELECTRIC CO., Ltd. | Verify with factory documentation | Capacitors, reactors, reactive power compensation, harmonic control | OEM buyers, SMEs, distributors, custom projects | Request current model-specific certification and QC records |
| SINEXCEL | 2007 / Shenzhen | SVG, AHF, energy storage, EV charging, power quality | Large projects and international distribution | Global power-quality supplier with multi-location operations |
| INVT | 2002 / Shenzhen | Industrial automation, iSVG, solar and energy solutions | PV, industrial automation, structured projects | International certification and laboratory capability |
| FGI Science and Technology | 1970 / Shandong | Medium-voltage VFDs, SVG, explosion-proof power electronics | Mining, metallurgy, medium-voltage projects | Industrial and medium-voltage application focus |
| Anhui Zhongdian Electric (ZDDQ) | 2001 / Anhui | SVG panels, APF, power-quality equipment | Custom cabinets and mid-sized engineering projects | ISO, CE, and type-test claims to be verified |
| Xi'an CoEpower Electric | Verify current corporate documents / Xi'an | AHF, SVG, PCS, power-quality solutions | OEM/ODM and export distributors | IEC, CE, ISO, and test-report claims listed publicly |
| Shanghai Yingtong Electric (YT) | Verify current corporate documents / Shanghai | AHF, SVG, active load balancing, STATCOM, ESS | Integrated harmonic and reactive power projects | ISO management-system information publicly listed |
| Hengyi Electric Group | 1993 / Wenzhou and Shanghai | SVG, APF, capacitors, reactors, controllers | Capacitor-bank upgrades and switchgear integration | Broad compensation-product portfolio |
| Shanghai Longliyuan Electric Power Technology | Verify current corporate documents / Shanghai | SVG, APF, new-energy and power-quality systems | Multi-site manufacturing and customized solutions | Public materials cite multiple production bases |
| Hengrong Electric | Verify current corporate documents | Capacitors, reactors, APF, SVG, compensation systems | Package sourcing and ODM requirements | ISO management system information listed publicly |
DINGNUO ELECTRIC CO., Ltd. is positioned as a manufacturer and solution provider for capacitors, reactors, reactive power compensation equipment, and harmonic-control products. Its solutions are relevant to industries with demanding power-quality requirements, including metallurgy, petrochemicals, automotive manufacturing, paper, textiles, building materials, and municipal infrastructure.
For overseas buyers, DINGNUO is particularly worth considering when the project requires more than a standard off-the-shelf SVG module. Its potential value lies in combining power-quality equipment with practical customization and responsive project communication.
- Integrated sourcing potential for capacitors, reactors, reactive power compensation, and harmonic-control products
- Flexible support for OEM branding, nameplates, packaging, manuals, cabinet configurations, and communication requirements
- Suitable for small and medium-sized brands, distributors, and engineering companies requiring lower-risk custom development
- More adaptable to non-standard project specifications than suppliers focused only on large-volume standardized models
- Potential to provide a coordinated solution for both reactive power compensation and harmonic-control requirements
DINGNUO is a practical supplier candidate for buyers that need a balance of product customization, communication efficiency, and cost control. Instead of treating SVG as an isolated product, buyers can evaluate whether the supplier can combine capacitors, reactors, filtering components, and compensation cabinets into a coherent power-quality solution.
Before placing an order, request the following from DINGNUO:
- Model-specific CE, RoHS, ISO, and type-test documentation where applicable
- IGBT module and key component brand list
- Factory Acceptance Test procedure
- Full-load and thermal test information
- OEM/ODM scope, including branding, manuals, software language, and cabinet design
- Production lead-time commitment and spare-parts policy
- Export packaging specification and container-loading plan
- Reference projects in similar industrial applications
Founded in 2007, SINEXCEL is a China-based provider of power-quality solutions, energy storage systems, EV charging equipment, and power-electronics products. Public company information indicates operations across Shenzhen, Huizhou, Xi'an, and Suzhou, with business coverage in more than 60 countries and regions.
SINEXCEL is often considered for projects requiring mature modular SVG and AHF product platforms, international documentation, and broader global service coverage. The company publicly states that approximately 30% of its workforce is engaged in R&D, which is relevant for buyers evaluating algorithm development, product iteration, and application engineering support.
- Data centers and semiconductor facilities
- Smart manufacturing plants
- Renewable energy projects
- EV charging infrastructure
- Large-scale power-quality retrofit projects
- Projects requiring SVG and AHF combination solutions
Buyers should still request model-specific compliance documents and clarify whether overseas commissioning, remote technical support, spare parts, and warranty services are included in the quotation.
INVT was established in 2002 and is listed on the Shenzhen Stock Exchange. Its product portfolio includes industrial automation, network power, electric transportation, and solar energy solutions. Public information indicates that INVT operates multiple R&D and manufacturing bases and serves customers in more than 100 countries and regions.
INVT's iSVG products can be relevant for industrial automation and renewable-energy projects that require fast, continuously adjustable reactive power compensation. In a publicly described 30 MWp photovoltaic project, INVT's iSVG solution was used to provide continuous reactive power adjustment from -7.5 to +7.5 MVar.
- Solar plants and renewable-energy grid integration
- Energy-storage systems
- Industrial automation projects
- Projects requiring integration with VFDs, PLCs, or automation platforms
- Buyers prioritizing established corporate scale and laboratory resources
INVT publicly lists CNAS laboratory recognition, TÜV ACT laboratory capability, and management-system certifications including ISO 9001, ISO 14001, and ISO 45001. Buyers should verify the relevance of these documents to the specific SVG product and manufacturing location involved in the purchase.
FGI was founded in 1970 and focuses on medium-voltage variable frequency drives, SVGs, explosion-proof power-electronics equipment, energy storage, and industrial electrical-control technologies. This makes it a supplier worth considering for heavy-industry environments where medium-voltage operation, harsh conditions, or explosion-proof requirements are central to the project.
FGI's public materials indicate participation in relevant SVG standards and power-electronics technical work. Its industrial background may be especially relevant for mining, metallurgy, petrochemical, and high-load manufacturing applications.
- Mining and mineral processing
- Metallurgical plants
- Chemical and petrochemical facilities
- Medium-voltage compensation systems
- Explosion-proof or harsh-environment installations
For these applications, buyers should ask for voltage-level-specific project references, insulation design information, protection coordination documents, and applicable explosion-proof certification where required.
Anhui Zhongdian Electric, also known as ZDDQ, was established in 2001 and is located in Bengbu, Anhui. Its public materials describe products including static var generator panels, active power line conditioners, and customized power-quality equipment.
ZDDQ may be suitable for buyers looking for customized SVG cabinets, factory-direct communication, and mid-sized engineering project support. Public information lists ISO 9001:2015, CE, and type-test documentation, but buyers should confirm the scope and validity for their intended model and production site.
- Custom low-voltage SVG cabinets
- OEM and project-based orders
- Industrial distribution-system retrofits
- Buyers combining SVG, APF, and automatic power factor correction requirements
Xi'an CoEpower Electric presents itself as a supplier of Active Harmonic Filters, SVGs, PCS, and power-quality products. Its public website states availability of OEM/ODM services and refers to IEC standards, TÜV CE certification, ISO 9001, and type-test reports.
CoEpower may be relevant for buyers who want to establish a private-label power-quality product line or procure multiple power-electronics products from one supplier.
- OEM and ODM projects
- Export distribution
- SVG and AHF package sourcing
- Power-quality solutions combined with energy-storage components
Before final supplier approval, confirm the issuing authority, test standards, date, and model coverage of all compliance reports rather than relying on website statements alone.
Shanghai Yingtong Electric, known as YT, supplies AHF, SVG, active load-balancing products, hybrid reactive-power compensation equipment, medium-voltage STATCOM, and energy-storage systems. Its portfolio is relevant for projects where reactive power, harmonics, and phase imbalance must be addressed as an integrated engineering issue.
YT publicly lists ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 management systems, together with OEM/ODM and overseas installation or commissioning support.
- Facilities with low power factor and harmonic distortion
- Plants using large numbers of VFDs, rectifiers, UPS systems, or welders
- Three-phase imbalance management
- Combined AHF and SVG projects
- International system-integration projects
Founded in 1993, Hengyi Electric Group has production operations in Wenzhou and Shanghai. Its product range includes APFs, SVGs, intelligent capacitor compensation systems, harmonic-suppression capacitors, reactors, and reactive-power compensation controllers.
Its broad portfolio makes Hengyi relevant for buyers upgrading from conventional capacitor-bank compensation systems to more dynamic SVG or hybrid compensation solutions.
- Traditional capacitor-bank modernization
- Low-voltage switchgear integration
- Industrial distribution panels
- Combined capacitor, reactor, controller, APF, and SVG procurement
Public materials cite production facilities in Wenzhou and Shanghai, but buyers should assess the actual SVG platform separately from the supplier's conventional capacitor-business capacity.
Shanghai Longliyuan Electric Power Technology focuses on Active Harmonic Filters, SVGs, new-energy products, and power-quality technology. Public information describes manufacturing sites in Shanghai, Hangzhou, and Xinxiang, with total workshop space exceeding 15,000 square meters.
This supplier may be relevant for buyers seeking project-oriented power-quality solutions rather than a simple catalog product.
- AHF and SVG integrated solutions
- Customized industrial projects
- Buyers seeking multi-site production capability
- Power-quality retrofit programs requiring system analysis
Buyers should require a calculation report based on real load curves, harmonic measurements, transformer capacity, and grid parameters. A supplier should not size an SVG only from transformer rating or connected load.
Hengrong Electric's public supplier information indicates product coverage across power capacitors, reactors, APFs, SVGs, and power-quality compensation systems. It also lists ODM services and ISO 9001, ISO 14001, and ISO 45001 management-system information.
Hengrong may be suitable for buyers sourcing basic power-quality equipment as a package, particularly where capacitors, reactors, compensation controllers, and SVG/APF products are all required.
- Low-voltage reactive-power compensation systems
- Distribution-panel manufacturers
- Package sourcing of capacitors, reactors, and SVGs
- ODM requirements for regional distributors
As with all suppliers listed on B2B directories, platform certification labels should be treated as preliminary screening data only. Request original documents and independently verify the certificate number, scope, issuing body, and validity period.
A Static VAR Generator uses a voltage-source converter to generate or absorb reactive current in real time. Compared with traditional capacitor banks, an SVG can deliver continuously adjustable inductive or capacitive reactive power, faster response, and improved performance under rapidly changing loads.
However, SVG and Active Harmonic Filter are not interchangeable products.
| Item | SVG | APF / AHF |
|---|---|---|
| Primary function | Dynamic reactive power compensation and power-factor correction | Harmonic-current mitigation |
| Main output | Capacitive or inductive reactive current | Compensating current opposite to harmonic current |
| Harmonic function | May offer limited harmonic compensation depending on design | Designed primarily to reduce harmonic current |
| Typical use | Fluctuating loads, poor power factor, voltage support | VFDs, rectifiers, UPS, welding machines, nonlinear loads |
| Common mistake | Assuming every SVG can replace an APF | Assuming an APF fully replaces reactive-power compensation |
When comparing quotations, request the following technical information:
- Rated capacity in kvar
- Rated current in amperes
- System voltage and frequency
- Three-phase three-wire or three-phase four-wire configuration
- Inductive and capacitive compensation range
- Response time and stated test conditions
- IGBT module brand, current rating, and sourcing policy
- Thermal design and derating curve
- Efficiency and power loss under rated conditions
- Protection functions for overvoltage, undervoltage, overtemperature, short circuit, fan failure, and phase loss
- Maximum parallel-unit quantity
- Communication protocols, such as Modbus RTU, Modbus TCP, CAN, or Ethernet
- Ingress protection rating, such as IP20, IP30, or IP54
- Harmonic compensation and load-balancing capability
- Capacity allocation logic when reactive power, harmonic filtering, and load balancing operate simultaneously
One of the least discussed issues in SVG procurement is that a supplier's stated rated capacity may not equal the compensation capacity available at your actual site.
For example, a 100 kvar SVG may be installed in a high-temperature electrical room, with poor cabinet ventilation, voltage fluctuation, and substantial harmonic current. If the same unit is also expected to compensate harmonics and three-phase imbalance, its total current capacity must be shared among multiple functions. The result can be current limiting, insufficient power-factor correction, or unstable performance during peak load periods.
- Request at least seven days of power-quality monitoring before final sizing.
- Ask for rated current, not only rated kvar.
- Confirm whether the SVG will compensate reactive power, harmonics, and imbalance at the same time.
- Require a clear priority logic for each compensation function.
- Ask for ambient-temperature derating curves.
- Include target power factor, harmonic target, acceptance point, and commissioning scope in the technical agreement.
- Require full-load test records or equivalent project references for comparable conditions.
Do not accept a certificate image as sufficient evidence. For ISO 9001 verification, confirm:
- Certificate number
- Validity date
- Certification body
- Scope of certification
- Registered company name
- Production address
- Whether the certification covers the actual SVG manufacturing facility
The certification scope should reasonably relate to power electronics, electrical equipment, switchgear, reactive power compensation equipment, or the supplier's relevant manufacturing activities.
For first orders, custom projects, or high-value contracts, arrange a Factory Acceptance Test before shipment.
A practical SVG FAT should include:
- Rated-voltage operation
- Inductive and capacitive reactive-power switching
- Load-step response
- Full-load running test
- Temperature-rise observation
- Protection-function verification
- Fan and cooling-system operation
- Communication-interface testing
- Nameplate, wiring diagram, manual, and packing inspection
Avoid accepting an undefined promise such as "15 days" or "30 days." The purchase contract should define:
- Technical agreement approval date
- Key-component procurement date
- Production completion date
- FAT date
- Packing completion date
- Shipment or bill-of-lading date
- Delay penalties or remedies
- Warranty period and spare-parts supply plan
SVG cabinets contain IGBTs, control boards, capacitors, fans, and precision components. Export packaging should include:
- Seaworthy plywood or reinforced wooden cases
- Moisture and shock protection
- Clear lifting points and center-of-gravity markings
- Serial-number photographs before packing
- Container-loading photographs
- Spare-parts and accessory packing lists
- Documentation in the buyer's required language
The right Chinese Static VAR Generator supplier is not necessarily the supplier offering the lowest kvar price. The right partner is the one that can support your project with transparent component information, model-specific compliance documents, stable manufacturing, realistic technical sizing, reliable delivery, and responsive after-sales support.
For buyers looking for flexible OEM cooperation, efficient communication, integrated sourcing of capacitors and reactors, and customized reactive-power or harmonic-control solutions, DINGNUO ELECTRIC CO., Ltd. is a supplier worth placing at the top of an initial qualification list.
For larger international projects, medium-voltage applications, highly standardized requirements, or complex multi-site deployments, suppliers such as SINEXCEL, INVT, and FGI should also be evaluated through a structured technical and commercial comparison.
To start an effective RFQ process, prepare your single-line diagram, transformer rating, load profile, power-quality test data, target power factor, harmonic limits, required voltage level, and installation conditions. This allows manufacturers to provide comparable SVG sizing, configuration, lead-time, and pricing proposals.
Ask for the full certificate, including the certificate number, expiry date, issuing body, company name, scope, and factory address. Then verify the certificate on the certification body's official database or contact the certification body directly. Do not rely only on marketplace badges or screenshots.
Not always. SVGs are ideal for fluctuating loads and applications requiring fast dynamic compensation. For stable loads with limited demand for fast response, a capacitor bank or hybrid solution may offer lower initial investment. The correct choice depends on measured load behavior, harmonic conditions, and power-factor targets.
The difference may involve IGBT grade, semiconductor current margin, control hardware, thermal design, EMC design, component brand, cabinet construction, testing standards, certification support, software functions, warranty terms, and technical service. A lower price may result from reduced thermal margin, lower-grade components, limited testing, or lower service coverage.
It may be part of the solution, but SVG alone may not be enough. VFD-heavy systems often produce harmonic current, so buyers should conduct a power-quality test first. If harmonics are the main issue, an APF/AHF or an SVG+APF combination may be more appropriate.
Common OEM items include the logo, nameplate, color, cabinet design, capacity combination, language of manuals, packaging, communication protocol, display interface, terminals, and cloud-monitoring connection. Fundamental changes to control hardware, power modules, thermal structure, or compliance design require prototype validation and a longer development schedule.
1. - General Administration of Customs of the People’s Republic of China: China’s 2025 goods trade totaled RMB 45.47 trillion, including exports of RMB 26.99 trillion, up 6.1% year on year. [customs.gov](http://www.customs.gov.cn/customs/xwfb34/302330/hgzs2025nqsjdjckqkxwfbh/index.html)
2. - China Chamber of Commerce for Import and Export of Machinery and Electronic Products: China’s mechanical and electrical product exports reached approximately USD 2.30 trillion in 2025, up 8.4%. [cccme.org](https://www.cccme.org.cn/news/details.aspx?id=C7E8547655CC36CAD5260211DC4C9F9D&classid=73DE9790C2E56969&xgid=F868932F64EB7AAF)
3. - China Energy News, citing CCCME statistics: China’s power-equipment-related exports reached approximately USD 37.4 billion in 2025, up 26%. [cpnn.com](https://www.cpnn.com.cn/news/dianli2023/202603/t20260323_1875237.html)
4. - INVT corporate, project, laboratory, and certificate information. [invt](https://www.invt.com/corporate-introduction)
5. - SINEXCEL corporate profile and ESG information. [en.sinexcel](https://en.sinexcel.com/power/partner.html)
6. - Public supplier information for FGI, ZDDQ, CoEpower, YT Electric, Hengyi, Longliyuan, and Hengrong. [fgimvd](https://www.fgimvd.com/)
