What is the lead time for production?

The average lead time is within 15 workdays for both peak season and off-season periods.

What is the warranty period for the solar panels?

We provide a 30-year warranty covering all solar panels, backed by Zurich Quality Insurance.

Tier 1 550W Solar Panel 5W-800W N-Type Factory Price Highest Efficiency

Name: Tier 1 550W Solar Panel 5W-800W N-Type Factory Price Highest Efficiency
Brand: Nantong Gamko New Energy Co., Ltd.
SKU: 1964621452

Jiangsu, ChinaNantong Gamko New Energy Co., Ltd.

US$0.06

100-54,999 w

US$0.05

55,000+ w

Product profile

Customization

Available

After-sales Service

Yes

Warranty

25 Years

Model NO.

GKA144M550W

Number of Cells

144PCS

Application

Household, Industial, Agriculture

Condition

New

Certification

EST, ISO, CB, CE, FCC, TUV, RoHS

Material

Monocrystalline Silicon

Weight

28.5kg

Voltage at Nominal Power(Vmp)

42.28 V

Current at Nominal Power(Imp)

13.01A

Warranty Time

Transport Package

by Carton & Pallet

Specification

2279*1134*35mm

Trademark

Gamko

Origin

China

HS Code

854140

Production Capacity

1.5gw Annual

Key features

High Efficiency Technology: Up to 23% efficiency using TOPcon and PERC technology for superior performance.

Comprehensive Warranty: 30-year product warranty with Zurich Quality Insurance coverage for all modules.

Low Light Performance: High voltage and stable output from 6am to 6pm even in low light conditions.

Strict Quality Control: Three-step EL and Flash testing to avoid hidden cracks and false welding.

Professional Design Service: Expert engineers provide on-grid, off-grid, and hybrid system design support.

Third-Party Inspection: Full cooperation with BV/SGS inspections; seller bears cost for orders over two containers.

Flexible Payment Options: Supports final payment after inspection and cooperates with CQC certification needs.

Global Certifications: Certified by CE, TUV, RoHS, FCC, ISO, IEC, and INMETRO for global compliance.

Company profile

Nantong Gamko New Energy Co., Ltd.

Jiangsu, China

Business Type: Manufacturer/Factory, Trading CompanyAverage Response Time: ≤4.87h

About Our Factory & Business Background

Address10 #-B-1f, No. 606, Kaifa Avenue, Dagong Sci&Tech Industrial Park, Haian County, Prc, Nantong, Jiangsu, China

Average Lead TimePeak Season Lead Time: within 15 workdays Off Season Lead Time: within 15 workdays

Our Production Capability & Technical Expertise

Main ProductsSolar Panel, Solar System, Solar Inverter, Cable, Solar Bracket, Solar Air Condition, Solar Controller, PV Connector, Solar Refrigerator, Solar Battery

Our Industry Experience & Global Business Record

Main MarketsAfrica, Eastern Asia, Western Europe, Mid East, Eastern Europe

Product Q&A

Q:Can I arrange personnel to inspect goods before shipment?

Yes, customers can use third-party companies like BV or SGS for on-site testing. We fully cooperate with these inspections. For orders exceeding two containers, we bear the inspection costs.

Q:How to apply for compensation if problems occur after 10 years?

We provide warranty and flash test reports with product barcodes upon shipment. The warranty covers defects, and we provide detailed documentation to support any claims.

Q:Do you provide PV system design and installation services?

We provide professional design for on-grid, off-grid, and hybrid systems (up to 1.27MW). We offer remote and online installation guidance, but do not provide door-to-door installation services.

Q:Can you provide DDP price or lower invoice for tariffs?

We can provide DDP, but CIP is recommended as it is more cost-effective. We can cooperate with lower invoice requests, but buyers must consider the associated risks.

Q:What certifications do your solar panels have?

Our modules are certified by CE-EMC, CE-LVD, INMETRO, ROHS, JPEA, FCC, IEC61215, IEC61730, IEC62321, IEC61000, ISO9001, ISO14000, German EPR, and France EPR.