Do you provide DDP pricing or low invoice values?

We can provide DDP, though CIP is more cost-effective. We can cooperate with low invoice requests, but buyers must consider the associated risks.

Can you provide PV system design and installation services?

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

What is the delivery time for a container?

Delivery takes 15 working days after receiving payment for one container, regardless of peak or off-peak seasons.

Tier-1 620W Solar Panel 18bb Bifacial Topcon High Efficiency 5W-800W Available

Name: Tier-1 620W Solar Panel 18bb Bifacial Topcon High Efficiency 5W-800W Available
Brand: Nantong Gamko New Energy Co., Ltd.
SKU: 1902679122

Jiangsu, ChinaNantong Gamko New Energy Co., Ltd.

US$0.075

1-6,199 Watt

US$0.074

6,200-61,999 Watt

US$0.073

62,000-619,999 Watt

US$0.072

620,000-6,199,999 Watt

US$0.071

6,200,000+ Watt

Sample price:US$200.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

Yes

Warranty

30years

Model NO.

GKA620W

Number of Cells

144PCS

Application

Household, Industial, Agriculture

Condition

New

Certification

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

Material

Monocrystalline Silicon

Weight

28/32kg

Nominal Operating Cell Temperature(Noct

45°c+2℃

Module Efficiency

23.99%

Temperature Coefficients of Pmax

-0.30%/℃

Temperature Coefficients of Voc

-0.25%/℃

Temperature Coefficients of Lsc

-0.046%/℃

Cell Type

Mono 182*91mm

Frame

Anodized Aluminium Alloy

Junction Box

IP68 Rated

Module Dimensions

2279*1134*30mm

Stand Packaging

36PCS/Pallet

Module Quantity Per 20'container

325PCS

Module Quantity

720PCS

Noct

45℃

Cable

4mm2(0.006inches2),Portrait:300mm(11.81inches)

Transport Package

by Carton & Pallet

Specification

2279*1134*30mm

Trademark

Gamko or OEM

Origin

China

HS Code

854140

Production Capacity

2gw/Year

Key features

High Efficiency TOPCon Cells: N-type TOPCon technology with module efficiency up to 23.99% and peak conversion up to 24.67%.

30-Year Warranty Coverage: Comprehensive 30-year warranty covering mechanical defects and performance degradation.

Severe Weather Resilience: Certified to withstand 2400Pa wind load and 5400Pa snow load with salt mist resistance.

Advanced PID Resistance: Passes PID tests to guarantee limited power degradation during mass production.

Multi-Step Quality Testing: Includes 3 EL tests and 2 Flash tests to prevent cell cracks and mixed grade issues.

Low-Light Performance: Advanced glass and surface texturing ensure excellent output in low-light environments.

Comprehensive Certifications: Holds EST, ISO, CB, CE, FCC, TUV, and RoHS certifications for global compliance.

OEM and Custom Support: OEM services welcomed with sample testing support and flexible production options.

Company profile

Nantong Gamko New Energy Co., Ltd.

Jiangsu, China

Business Type: Manufacturer/Factory, Trading CompanyAverage Response Time: ≤4.44h

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:Why should I choose your company over cheaper competitors?

Unlike cheap competitors who use low-efficiency cells and skip testing, we perform 3 EL and 2 Flash tests to ensure no hidden cracks or mixed grades, preventing hot spots and fires.

Q:What are the payment terms and security measures?

We accept 30% advance and 70% before shipment, LC at sight, or Made-in-China STS. Third-party inspections like BV and SGS are supported before shipment.

Q:Can I inspect goods at the factory before final payment?

Yes, customers can arrange third-party inspections. For orders exceeding two containers, we cover the inspection cost.

Q:How do I apply for compensation if panels fail after 10 years?

Submit claim sheets with the flash test report and warranty barcode. We provide after-sales service throughout the warranty period.

Q:Are there hidden fees in shipping costs?

Full containers have no hidden fees. For LCL or CIF terms, charges may be collected at the destination port; we recommend FOB or CIP terms to avoid uncertainty.