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LONGI 450W Solar Panel 144 cell LR4-72HPH-35

Solar Loan from 6.99%
All Longi Solar Technology products All 450 Watt Panels


Rated Power Output 450 W
Voltage (VOC)49.3 V
Number of cells144
Cell TypeMonocrystalline
Rated Efficiency20.7 %
Connector TypeMC4 or MC4 compatible
Backsheet Colorwhite
Frame Colorsilver
Dimensions LxWxH82.5" x 40.9" x 1.38
Weight51.81 lb
ManufacturerLongi Solar Technology
Manufacturer Part #LONGI450WLR4-72HPH-35
Operating Temperatures -40 °F to +185 °F
Scope of Application
  • Solar Panels for Boats
  • Solar Panels for Commercial
  • Solar Panels for Home
  • Solar Panels for RV
  • Grid-Tie
  • Off-Grid
Delivery Time 5-7 business days

About product

450w LONGi 144 half-cut cells, white backsheet, 1400mm cables, MC4, 35mm silver frame.

LONGi LR4-72HPH 450w is a model that uses a number of technologies to bring durability and performance to the next level.

This module takes full advantage of half-cut cell technology for lower resistive losses and better shade tolerance. At the same time, a reflective layer on the back allows the panels to capture up to 12% more energy. By adding a solid PID resistance and special glass lamination on top, the manufacturer ended up with an efficient and very durable model that is guaranteed to retain at least 84.8% of output after 25 years.

More power output

An already high efficiency of 20.7% is further enhanced by PERC technology, which allows to harvest up to 12% more energy from the back side of the panel. The heat is also less of a threat with this module: with one of the lowest temperature coefficients in the industry, LONGi 450w loses just 0.35% of efficiency for every 1.8°F above 77°F. Half-cut cell technology adds a few more percentage points to the final count, making this model a great example of efficiency.

Optimized design for higher reliability

Careful module BOM selection and solar cell process optimization ensure solid PID resistance. Enhanced electrical design and lower operating current reduce the risk of hot spot formation and decrease resistive losses.

A panel that can handle hail, wind and snow

A 35 mm frame made from anodized aluminum alloy and 3.2 mm layer of protective tempered glass make this module resistant to the foulest of weather. These panels pass a hailstone test where they take on 1″ hail grains at the speed of 51 mph. The front side of the modules can resist a 5400 Pa load, and the back side 2400 Pa.

25 year power warranty

Slow degradation over the next quarter of a century is guaranteed by the manufacturer. The performance will decrease no more than 2% during the first year and then will be limited to 0.55% annually. Your modules will retain at least 84.8% of original performance 25 years later. The manufacturer also offers a 10 year product warranty.

Product details

  • Manufacturer Part Number: LR4-72HPH-445M (1400 mm / MC4)
  • Power Output: 450 Watts
  • 144 Cell, Monocrystalline
  • 35mm Depth, Silver Frame, White Backsheet
  • 1500 Volts Max Voltage
  • Shipping Weight: 51.8 lb
  • Shipping Dimensions: 82.5 x 40.9 x 1.38 in
  • Pallet Qty: 30

Reviews & Questions

  • Reviews (3)
  • Questions (3)
I'm loving my PV modules by Longi. They generate enough power to use for my pond at night saving me some real money. The installation was pretty straightforward, thank you
Mr. Rolando
06/14/2021 07:43 pm
The LONGi panels are robustly built and high quality. The modules were shipped without delay and arrived in excellent condition. I will return for more of them in the future when we decide to expand our PV system.
Dannie Smart
05/28/2021 09:22 am
In total I now own twelve of these panels. On sunny days they manage to charge my battery bank by noon. If there are clouds in the sky, it takes longer, but not a great deal longer.
Jake Gann
05/04/2021 02:21 pm

Leave a review

Could you tell me the fuse rating of these panels?
07/08/2021, 15:17
Maximum series fuse rating of this model is 20 A.
How long will it take for the panels to arrive in Lincoln, Nebraska?
Ricki D.
06/18/2021, 11:26
We normally process all orders within 24 hours and ship them within 48 hours. Estimated delivery time is 4-7 days.
What do you mean when you write 450 watt? Is that how much the panel will output?
Fishing Guy
05/12/2021, 14:24
That’s right, but only when your modules are functioning under the optimal conditions.


How much is shipping and how long is delivery?
Our standard shipping charge is $250 for up to 11 panels and it is increased by $25 for every 4 additional panels. In the event, the product is only available on East or West coast custom quote will be sent to you before the order is processed. Normally, we are able to deliver solar panels within 7 business days.
What is the difference between low price panels and top price panels?
With top tier solar panels, you pay for the brand name, proprietary new technology, higher energy output, and better warranty support.
What are the dimensions of the panel?
Please refer to the product datasheet on the product page. We have a datasheet for every product we sell.
How long is the warranty on the panel?
In general, manufacturers provide a 25 year-long performance warranty and a 10 year-long equipment guarantee. Some manufacturers offer 12-15 years of warranty. More information is available in our warranty support section.
Which panels do you recommend for RV, marine?
We recommend Panasonic and Mission Solar panels for smaller systems as their high energy output and excellent craftsmanship guarantee years of service.
Can this panel be used with a 12v system?
Any of our panels can be used for a 12v system with a properly selected inverter and charge controller.
Can I pick up this panel from your fulfillment center to save on shipping?
Yes, we can set up a pick up at a local distributor. Please call to discuss options and stock availability.
How do I connect these panels?
To achieve the best system efficiency, panels should be connected in series to create higher voltage.
How many panels do I need?
This number is determined by your average energy needs. Depending on the type of panels and energy consumption, you might need anywhere from 12 to 45 solar panels. Remember, the more panels you install the more energy you will get.Please use our solar calculator to estimate your energy consumption and plan on building a solar system that will exceed your energy needs by 25%.
Do you offer discounts?
We do offer discounts for orders of over 50 units. Please contact us for details.
How do I build a solar system?
Please use our solar calculator to estimate what equipment you need. Choose your panels, microinverters, inverters, and solar batteries if necessary.Please note that we do not offer solar system design or installation.
How do solar panels compare?
Solar panels differ by power output, voltage, connection type, size, efficiency, and weight. Some solar panels might be sold together with microinverters as a set.
Can I build a solar system by myself as a Do It Yourself project?
Yes, it is possible if you understand what solar equipment you need and how to connect it together. However, please be mindful that handling your own electrical work without having proper experience might cause life-threatening injuries. Please contact a certified electrician if you do not possess appropriate electrical skills.
Can I connect and charge my solar panel battery directly with the solar panel?
We do not recommend using the solar panel without the charge controller. Using solar panels without the charge controller might damage the batteries.
Can I drill holes into the aluminum frame for mounting?
We do not recommend drilling any new holes to the aluminum frame of the panel as it could damage the internal circuit and solar cells. (Also, any modification to the panel will void the warranty). We recommend only using the pre-drilled holes for mounting.
Do solar panels require maintenance? Can I wash my solar panel?
Solar panels generally require very little maintenance. We recommend cleaning the solar panel with water, glass cleaner (Windex) and microfiber cloth.
Will my panel produce power in an overcast condition?
While solar panels require sunlight to generate solar energy, they will still work in cloudy weather. Even on a cloudy day, solar panels will produce energy just not as much.
Will my panels produce power if covered with snow?
Solar panels cannot produce electricity if covered with snow.
What is the best direction for a solar panel to face?
The best direction for a solar panel to face is the South