For OEM buyers, distributors and private-label brands, some of the inverter generator manufacturers in China worth shortlisting include FULLAS, SENCI, Loncin, RATO, United Power, LUTIAN, DUCAR, DINKING, BISON and Yaofeng Power.

However, there is no single manufacturer that is best for every project. The right supplier depends on your required power range, fuel type, inverter performance, certifications, customization level, order volume and after-sales requirements.

This guide compares ten Chinese manufacturers using publicly available product and company information, with a focus on what matters to OEM and wholesale buyers rather than consumer brand popularity.

Note: The order below is a sourcing shortlist, not an independent laboratory performance ranking.

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Quick Comparison of Inverter Generator Manufacturers in China

Manufacturer	Main Strength	Product Position	Best Suited For
FULLAS	Wide 2–11kW class range, dual/tri-fuel options	Portable & silent inverter generators	OEM distributors and private-label programs
SENCI	Established generator manufacturing platform	Broad inverter generator range	Large distributors and established generator programs
Loncin	Strong engine + inverter integration	Quiet and open-frame inverter generators	Buyers focused on engine platform and power quality
RATO	Strong high-power inverter range	Residential to professional power	High-output and commercial applications
United Power	Broad open-frame generator portfolio	Portable & open-frame inverter generators	Value-oriented wholesale programs
LUTIAN	Large multi-category manufacturing platform	Portable and higher-output generators	Large distributors sourcing multiple categories
DUCAR	Enclosed + open-frame inverter platforms	Compact to high-power generators	Buyers needing multiple generator architectures
DINKING	Flexible product design and customization	Silent & open-frame inverter generators	Private-label and appearance customization
BISON	Broad wholesale-oriented range	Small to mid/high-power inverter generators	Flexible OEM and wholesale sourcing
Yaofeng Power	Long-established gasoline generator specialization	Compact and mid-power digital inverter generators	Traditional portable generator programs

The companies differ significantly in scale and product strategy, so buyers should treat this table as a starting point for supplier due diligence rather than choosing by company size alone.

1. FULLAS

Best for: OEM distributors that want a broad inverter-generator range from compact gasoline models to high-power multi-fuel units.

FULLAS is a Chongqing-based power equipment supplier serving global B2B buyers. Its current inverter-generator line is divided into portable i Series and silent professional iS Series, with OEM/ODM support for branding, product appearance, packaging and technical configurations. The company positions this range specifically for distributors, wholesalers and project buyers rather than retail sales.

Current FULLAS Inverter Generator Range

Model	Rated Output	Max. Output	Fuel Configuration
FP2000iS	1,800W	2,000W	Gasoline
FP2500i	2,000W	2,500W	Gasoline
FP3750i	3,000W	3,200W	Gasoline
FP3500iS(E)	3,200W	3,400W	Gasoline / LPG
FP4500iS(E)	3,800W	4,200W	Gasoline / LPG
FP5050i	4,000W	5,000W	Gasoline
FP7000iS(E)	6,000W	6,500W	Gasoline / LPG / NG
FP8500iS(E)	7,200W	7,600W	Gasoline / LPG / NG
FP12000iSE	10,000W	11,000W	Gasoline / LPG / NG

The FP3500iS(E) and FP4500iS(E) add gasoline/LPG dual-fuel capability, while the FP7000iS(E), FP8500iS(E) and FP12000iSE support gasoline, LPG and natural gas. The larger FP12000iSE also supports single- and three-phase configurations and produces up to 11,000W maximum output.

Below is the complete range of products for the Fullas variable-frequency generator.

Another useful point for OEM buyers is product continuity across several power classes. Instead of importing an isolated 2kW or 3kW model, distributors can build a product family covering compact portable generators, mid-power backup units and higher-output professional models.

Explore the complete FULLAS inverter generator range.

Buyer should verify: target-market certification, sockets, voltage/frequency, fuel configuration, packaging and spare-parts package for the exact model before mass production.

2. SENCI

Best for: Established distributors looking for a mature generator manufacturer with a broad international product platform.

SENCI Mechanical & Electrical was established in 1990 and is listed on the Shanghai Stock Exchange. Its product portfolio includes inverter generators alongside engines, conventional generators and other engine-driven equipment.

Its scale and long history make SENCI particularly relevant to larger generator programs where buyers value an established manufacturing platform and a broad product ecosystem.

For OEM buyers, the important question is not simply whether SENCI can produce the required wattage. Buyers should confirm the customization threshold, territory policy, model availability and minimum order requirement for their specific market.

3. Loncin

Best for: Buyers that place strong emphasis on engine technology, inverter control and integrated power platforms.

Loncin has a substantial general-purpose engine and generator business and offers both quiet and open-frame inverter generator platforms. Its current inverter range includes models such as the LC4500i, which provides 3.5kW running power, 4.5kW starting power, parallel capability and ≤3% THD. Selected newer platforms specify even lower harmonic distortion.

Loncin is particularly interesting when the buyer wants the engine and generator platform to come from a company with extensive engine-development experience.

For private-label sourcing, confirm whether the required engine, inverter module and enclosure combination is available for OEM production rather than assuming every Loncin-branded model can be customized.

4. RATO

Best for: Buyers looking for higher-output inverter generators and professional power platforms.

RATO was founded in Chongqing in 2007 and manufactures engines and power equipment. Its current inverter-generator portfolio includes the M-series, which the company states covers rated outputs from approximately 4.2kW to 18kW, extending well beyond the compact camping-generator segment.

This makes RATO especially relevant for:

Higher-power home backup
Professional applications
Construction support
Commercial portable power

RATO also develops enclosed and open-frame inverter-generator configurations.

OEM buyers considering RATO should compare the exact high-load performance, certification package and local service requirements of each model rather than selecting purely by maximum wattage.

5. United Power

Best for: Buyers building an open-frame or value-oriented inverter-generator portfolio.

United Power produces engines and engine-driven power equipment, including an active range of open-frame inverter generators. Its current catalog includes models such as the IG4500M, IG7000FE and IG8000E, extending from smaller portable products into 7kW-class open-frame inverter solutions.

Open-frame inverter generators can be attractive for distributors that need:

Higher output at a competitive product position
Cleaner inverter power without a fully enclosed housing
Professional or jobsite-oriented models
Lower structural complexity than premium silent models

For buyers targeting retail channels, noise, enclosure design and packaging should be compared carefully against fully enclosed competitors.

6. LUTIAN

Best for: Large distributors sourcing generators together with other power and cleaning equipment.

LUTIAN operates a broad machinery portfolio covering generators, engines, pumps, pressure washers, energy storage and other equipment. The company states that it operates three manufacturing bases totaling approximately 300,000 m² with more than 2,500 employees.

Its generator catalog includes inverter models such as the LT4000iS and higher-output inverter products.

LUTIAN is therefore particularly relevant to larger buyers that do not want to source only one generator category. A distributor purchasing generators, pressure washers and related equipment may benefit from consolidating more of the supply chain with one manufacturer.

For a dedicated inverter-generator brand, however, buyers should still compare how much model-specific customization is available.

7. DUCAR

Best for: Buyers comparing enclosed silent generators with higher-output open-frame inverter platforms.

DUCAR is the power-equipment brand of Chongqing Dajiang Power Equipment and manufactures gasoline engines and generator products. Its inverter-generator portfolio includes an enclosed B Series covering approximately 1.4–4.5kW and open-frame inverter generators covering approximately 3.5–9kW.

This architecture gives OEM buyers two clearly different product directions:

Compact enclosed models for residential and portable markets
Higher-output open-frame units for work and backup applications

That can be useful for distributors targeting several market segments without making every generator look or perform the same.

8. DINKING

Best for: Private-label buyers that place more emphasis on product appearance and configuration flexibility.

Chongqing DINKING Power Machinery was founded in 2010 and manufactures engines, conventional generators and inverter generators. Its catalog includes both enclosed inverter generators and open-frame models.

The company also emphasizes product appearance customization and states that its production system includes seven automatic assembly lines.

This makes DINKING worth evaluating for private-label projects where the buyer wants greater differentiation in housing, panel design or overall product presentation.

As with any highly customized program, buyers should request a finalized BOM and signed specification sheet before approving mass production.

9. BISON

Best for: Buyers looking for flexible wholesale sourcing and a broad selection of enclosed and open-frame models.

BISON is based in Taizhou, Zhejiang and manufactures generators, engines, pumps and other machinery. Its inverter-generator catalog states that it includes 16 enclosed models and seven open-frame models, covering approximately 1,000W to 7,500W.

BISON also promotes customization and multiple fuel configurations, making it relevant to smaller or mid-sized distributors building a private-label range.

For buyers comparing several Chinese suppliers, BISON is worth checking particularly in the compact-to-mid-power segment.

10. Yaofeng Power

Best for: Buyers focused on traditional compact and mid-power digital inverter generators.

Zhejiang Yaofeng Power Technology specializes in gasoline engines and generators. Its official company information describes a digital inverter-generator range covering approximately 0.75kW to 6kW.

Compared with manufacturers pushing heavily into 10kW+ products, Yaofeng’s range remains relevant to buyers concentrating on:

Compact portable generators
Residential backup
Outdoor power
Traditional dealer channels

For this type of supplier, buyers should evaluate whether the existing platform can be adapted to their required sockets, control-panel layout, emissions requirements and packaging.

How Should OEM Buyers Compare Inverter Generator Manufacturers?

The manufacturer name is only the first step. Before requesting final quotations, compare these six areas.

1. Compare Rated Power, Not Only Maximum Power

A generator advertised as “5000W” may provide considerably less continuous output.

Always request both:

Rated continuous power
Maximum or starting power

For distributors, rated output is generally the more useful number when building product positioning and comparing competing quotations.

2. Check THD and Power Quality

One of the main reasons customers buy an inverter generator is cleaner electrical output.

For sensitive electronics, ask the supplier to provide the specified Total Harmonic Distortion (THD) and, for larger projects, consider verifying it during sample testing.

FULLAS, for example, specifies ≤3% THD across its current professional inverter-generator range. Models such as the FP7000iS(E) combine this with 6,000W rated output and multi-fuel capability.

3. Verify Certifications by Exact Model

Do not accept a general statement such as:

“We have CE, EPA and CARB.”

Instead ask:

Which exact model is covered?
Which engine family is listed?
Which test standard was used?
Is the certificate valid for your target market?
Can the supplier provide the certificate and test report before the order?

Certification requirements vary between Europe, the United States and other markets, so they should be checked during product selection rather than after production.

For a more detailed sourcing checklist, see How to Choose an OEM Inverter Generator Manufacturer in China.

4. Test the Sample Like a Distributor, Not a Consumer

A five-minute no-load test is not enough for an OEM project.

A useful sample evaluation should include:

50% and 100% load operation
Sudden load changes
Hot and cold starting
Voltage and frequency stability
THD measurement
Noise verification using the stated test method
Electric or remote start testing
Fuel-switching tests for dual- or tri-fuel models
Overload and protection behavior

If the sample passes, record the engine, inverter module, carburetor/fuel system, control panel and other important components.

The mass-production order should match the approved sample.

5. Lock the Specification Before Mass Production

OEM buyers should not rely only on product photos.

The final order specification should clearly define:

Engine model
Rated/max power
Voltage and frequency
Sockets
Starting system
Fuel type
Inverter module
Control panel
Color and logo
Packaging
Accessories
Manuals
Spare parts

If any key component changes later, the supplier should notify the buyer before production.

This is especially important when building a private-label brand that will reorder the same model over several years.

6. Ask About Spare Parts Before Asking About the Lowest Price

Generator distributors eventually need:

Air filters
Spark plugs
Recoil starters
Carburetor/fuel components
Inverter modules
Control panels
Switches and breakers
Wheels and handles
Plastic housing components

A generator that is slightly cheaper at purchase can become more expensive if replacement parts are difficult to identify or unavailable after two years.

For long-term OEM programs, parts support should therefore be evaluated together with the unit price.

Which Chinese Inverter Generator Manufacturer Should You Choose?

The best choice depends on the project.

For a broad private-label range:
FULLAS is worth shortlisting if you want compact, mid-power and high-power models under one product line, especially when dual-fuel and tri-fuel configurations are required.

For established large-scale generator manufacturing:
SENCI and Loncin are strong companies to evaluate.

For higher-output inverter platforms:
RATO is particularly relevant because its current range extends well into high-power applications.

For open-frame inverter generators:
United Power, DUCAR and DINKING provide useful platforms to compare.

For large multi-category sourcing:
LUTIAN may be attractive when generators are only one part of a broader equipment program.

For flexible wholesale/private-label sourcing:
BISON and DINKING are worth evaluating.

For compact and mid-power digital inverter generators:
Yaofeng remains a relevant option.

The correct approach is therefore not to ask:

“Who is the biggest inverter generator manufacturer in China?”

A better question is:

“Which manufacturer has the right product platform, compliance documents and OEM system for my market?”

Final Thoughts

China has a mature supply chain for inverter generators, but suppliers differ considerably in power range, engine technology, inverter architecture, fuel options, OEM flexibility and after-sales support.

For an OEM buyer, the strongest supplier is not necessarily the factory with the lowest quotation or the largest catalog.

It is the supplier that can consistently deliver the same approved specification, correct compliance documents, stable power performance and long-term parts support across repeat orders.

For buyers building a private-label inverter-generator range, FULLAS currently offers nine inverter-generator models covering compact portable units through 10kW rated-output professional models, including gasoline, dual-fuel and tri-fuel configurations. Its product line is designed for OEM/ODM and wholesale cooperation with global distributors and project buyers.

Frequently Asked Questions

Who are the leading inverter generator manufacturers in China?

Manufacturers worth evaluating include FULLAS, SENCI, Loncin, RATO, United Power, LUTIAN, DUCAR, DINKING, BISON and Yaofeng Power. The best choice depends on product range, target market, OEM requirements and compliance needs.

What should I check before choosing an OEM inverter generator manufacturer?

Check rated and maximum output, THD, engine platform, certifications, customization capability, quality-control procedures, spare-parts availability and specification consistency between samples and mass production.

Can Chinese manufacturers produce dual-fuel or tri-fuel inverter generators?

Yes. Some manufacturers offer multi-fuel platforms. FULLAS, for example, offers gasoline/LPG dual-fuel models as well as higher-power gasoline/LPG/NG tri-fuel models.

What power range does FULLAS currently offer?

Its current nine-model range starts at 1,800W rated output and extends to the FP12000iSE with 10,000W rated and 11,000W maximum output.

Is the cheapest inverter generator supplier usually the best choice?

Not necessarily. For OEM buyers, compliance, stable specifications, product testing, spare parts and repeat-order consistency can have a greater impact on long-term cost than the initial unit price.

About the Author

Nancy Huang — CEO & Supply Chain Integration Expert at FULLAS

Nancy Huang specializes in global supply chain integration and outdoor power equipment solutions. As CEO of FULLAS, she works with international distributors and business partners on generators, engines, portable power equipment and other OEM supply projects.

Her work focuses on connecting product requirements with reliable supply-chain resources and helping B2B buyers evaluate equipment from a practical sourcing perspective.

Connect with Nancy Huang on LinkedIn

Top 10 Inverter Generator Manufacturers in China for OEM Buyers