Why ground the module frame?

Prevents electric shock from insulation failure, not just lightning protection.

Do modules really last 25 years? What should I check in the warranty?

Yes, but with degradation. Product warranty: usually 10-12 years (defects). Power warranty: 25 years- compare linear power guarantee.

Does tilt/orientation matter a lot?

Yes. Optimal tilt equals to local latitude; true south (northern hemisphere) is best. North-facing kills output.

Why do some N-type modules (TOPCon, HJT) perform better in low light?

Higher internal resistance and better low-light response. They produce power earlier in the morning and later in the evening than P-type modules.

Longi Solar Panel Price 640W 650W 660W Hpbc Monocrystalline Solar Cell Solar Energy Panel Module for Solar Rooftop Solar System

Name: Longi Solar Panel Price 640W 650W 660W Hpbc Monocrystalline Solar Cell Solar Energy Panel Module for Solar Rooftop Solar System
Brand: Enjoy Solar Co., Ltd
SKU: 1969155401

Anhui, ChinaEnjoy Solar Co., Ltd

US$78.00-86.00

100 Pieces

Product specifications

Solar Panel Power

Product profile

Customization

Available

After-sales Service

Repair, Replacement

Warranty

30years

Model NO.

LR7-72HVH-650M

Number of Cells

144cells (6*24cells )

Application

Solar Energy System

Condition

New

Certification

ISO, CB, CE, TUV

Material

Monocrystalline Silicon

Package Details

36PCS/Pallet, 70PCS/40hc

OEM/ODM

Frame

Anodized Aluminium Alloy

Weight

28.5kg

Size

2382×1134×30mm

Junction Box

IP68, Three Diodes

Maximun System Voltage

1500V DC(IEC)

Static Loading

Snow Loading :5400PA /Wind Loading :2400PA

Cell Type

Bc-Cell

Cable Length

4mm2 Length , +400, -200mm/±1400mm Can Be

Cable Cross Section Size

TUV:4mm^2(0.06inches^2)UL:12wg

Operating Temperature

-40℃-+85℃

Module Efficiency

23.04%

Glass

Single Glass, 3.2mm Coated Tempered Glass

Fire Rating

IEC Class C

Transport Package

Carton with Wooden Package

Specification

2382× 1134× 30mm

Trademark

Longi Solar

Origin

China

HS Code

8541402000

Production Capacity

10gw/Year

Key features

HPBC 2.0 Technology: Revolutionary cell tech with 0BB structure and TaiRay wafer for superior performance.

High Module Efficiency: Efficiency reaches up to 24.8% under NOCT conditions for maximum energy output.

30-Year Warranty: Comprehensive warranty coverage for 30 years ensuring long-term reliability.

Superior Energy Yield: Outperforms TOPCon by 8.7% in global energy yield simulations.

Extreme Security: Prevents overheating, eliminates fire risks, and offers micro-crack resistance.

Aesthetic Design: No frontal gridlines providing a sleek, modern look for solar rooftops.

High Durability: Withstands snow loading of 5400Pa and wind loading of 2400Pa.

IP68 Junction Box: Three diodes with IP68 rating for superior protection against dust and water.

Company profile

Importers and ExportersFast DeliveryCustomization from DesignsHigh Repeat Buyers Choice

Enjoy Solar Co., Ltd

Anhui, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc.Export Year: 2015-10-02 CertifiedNearest Port: Shanghai Port, Guangzhou PortAverage Response Time: ≤1.58h

About Our Factory & Business Background

AddressSuite 601, Building No. 7, 667 Yulei Road, Shushan District, Hefei City, Anhui Province, 230088 China, Hefei, Anhui, China

Terms of PaymentT/T, D/P, PayPal, Western Union, Small-amount payment, Money Gram

International Commercial Terms(Incoterms)FOB, EXW, CFR, CIF, DAT, FAS, DDP, DAP, Others, FCA

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

Supply Chain Partners10

Our Production Capability & Technical Expertise

Main ProductsBess Container, Solar System, Lithium Battery, Solar Panel, Solar Inverter, Solar Energy Storage System, Solar Air Conditioner, Portable Power Station, Lead Acid Battery, Solar Pump

Our Industry Experience & Global Business Record

Main MarketsNorth America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe

Repeat Buyers Choice50%~80%

New Products Launched in Last yearYes

Product Q&A

Q:New modules lost power quickly - is it a defect?

Likely UVID (UV-induced degradation) or a metastable state.This is temporary - N-type modules often recover after more sunlight exposure. Not a permanent failure.

Q:What causes a hot spot (burning smell, local heating)?

Hot spotting - caused by shading (bird droppings, leaves) or a cracked cell. Can lead to glass cracking or fire. Clean the module; if still hot, replace the affected cell/module.

Q:Are microcracks (invisible cracks) dangerous?

Yes - they reduce power output and can develop into hot spots. Avoid stepping on modules during installation. Replace if severe cracks are found via EL testing.

Q:What are edge bubbles on glass-glass modules?

Edge delamination - poor lamination or material failure. It lets moisture and air in, which can cause arcing (fire risk). Ask for DH (damp heat) test reports before buying.

Q:Snow - leave it or remove it?

Remove it - snow blocks power and adds weight. Use a soft plastic shovel or brush. No metal tools.