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340W 72cells Mono Solar Panel for 20KW on grid solar system


What’s the solar energy:
The single solar battery can not be used directly as a power supply. For power supply, several single battery strings, parallel connections, and tight packages must be packaged into components. Solar cell components(also known as solar panels, photovoltaic components) are the core part of solar power generation systems and the most important part of solar power generation systems. Its role is to convert solar energy into electrical energy, or send it to storage in a battery, or promote load work. The quality and cost of the solar cell assembly will directly determine the quality and cost of the entire system.

Features of solar panel

Polycrystalline or Monocrystalline silicon is a material consisting of thin wafers that are cut from a silicon crystal which has grown in several directions. This advanced texturing process provides polycrystalline or moncrystalline solar panels with a higher power output than amorphous panels of the same dimensions, and makes them more cost and space-effective. These individual wafers are assembled into panels that are covered by durable, weatherproof tempered glass. Thanks to their efficiency and durability, these solar panels require virtually no maintenance once installed.

Technical data

 340W 72cells Mono Solar Panel for 20KW on grid solar system

Cells size(mm):156*156


Optimum power voltage(WP):350w

Optimum power voltage(Vmp):36.0

Optimum operating current(Imp):9.72

open circuit voltage(Voc):43.2

Short circuit current(Isc):10.79

Max system power(VDC):1000V(IEC)

Working temperature range:-40℃ to + 85℃

Efficiency :18.44%

Max temperature cofficient:-0.48%/℃

Temperature cofficient:-0.34%/℃

ISC temperature cofficient:0.015%/℃

Rated operating battery:45+/-2℃

Standard test conditions( STC)1000W/M²; 1.5AM

Type of connectors:MC4


product picture

340W 72cells Mono Solar Panel for 20KW on grid solar system


Longsun Solar( old Kelan Solar), established in 2008, is a professional green power producer and exporter of solar panel and solar module in Ningbo, China.

Our main products are 2 -350 watt mono crystalline and poly crystalline silicon solar panels in standard or special sizes and shapes. We also design solar street light system and solar power systems for homes and industrial use.

Our factory is located in Daxie development zone, with convenient transportation access. It closes to port of Ningbo.

Besides, we have received ISO9001 and CE certificates. High quality raw materials, strict control system, advanced technology and testing equipment ensure each piece of solar panel from LONGSUN SOLAR with extremely supper efficiency and long usage time of 25 years. Until now, our solar panels and systems were exported to the overseas market, like Southeast Asia countries, Middle east countries, South America countries and Africa.

Choose us means you get a reliable partner with mutual development and mutual benefits. 

Quality and safety:

Industry Leading Online Quality Assurance.
Strong 40mm strong frame, can hold 5400pa load.
Resistance to salt fog, ammonia and sand lifting, suitable for seaside, farm and desert environments.
25 years linear performance guarantee.

Materials of solar panel

  Solar Cell------Mono-crystalline solar cell 156*156mm

  Front Glass-------3.2mm, high transmission, low iron, tempered glass

  EVA-------excellent anti-aging EVA

  TPT-------TPT hot seal made of flame resistance

  Frame------anodized aluminum profile

  Junction Box-------IP65 rated, high quality, with diode protection

Superiority: high quality anodized aluminum frame, high efficiency long life, easy installation, strong wind resistance, strong hail resistance.

Recommended applications:

Any large or small connected or off-grid solar power station.
Roof systems for commercial and industrial buildings
Biochemical system.
Any commercial or industrial ground installation system
Solar TV sets, solar power generation, solar water heaters, solar street lights, road solar street lights, solar vehicles/electric vehicles, satellites, spacecraft, space solar power stations, energy-saving lights, environmental protection.


High quality anodized aluminum frame, high efficiency long life, easy installation, strong wind resistance, strong hail resistance.

Is solar power difficult to use?

Although the production of solar panels incorporates a high-tech manufacturing process, it is really very easy to use a photovoltaic system. Solar panels have no moving parts to wear out, they can be used alone or in combination with other energy sources, and they are silent, reliable and long lasting.

What can you power with Photovoltaics?

A properly designed photovoltaic system can supply electricity for many applications, from small remote lighting needs to megawatts of power for large utility companies. An advantage of photovoltaic power is that it can do anything a traditional power generator can do, only without consuming pollution-causing fuel, or requiring noisy motors.

What is a PV system?

A PV system consists of all the equipment and materials needed to generate solar energy, including solar panels (often called modules), a support structure, wiring, an inverter, a meter and other equipment as required by a specific application. Longsun Solar’ s PV system for commercial buildings, and ET Solar system for residential uses are examples of complete PV systems.

What is a solar module?

Solar modules are series of solar cells, wired together and enclosed protect them from the environment. They are often referred to as in self-contained glass units to solar panels as well.

Why Choose Us?

Corner ProtectionInside CartoCarton sidePallets Package
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Payment Term




30% T/T in advance, paid the balance before shipment



 30% T/T in advance, paid the balance against copy of B/L



L/C amount above 50,000 usd, we can accept L/C at sight

West Union

 Amount lower than 5000usd

West Union

Delivery Time

7-15days after receiving the payment. ( based on your exact order quantity)

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