Sunpro Power 550W Solar Panel 144 Cell Bifacial SPDG550-144M10 Wholesale 31 panels per pallet

Customer reviews & Questions

Verified buyer reviews

Reviews (39)
Questions (5)

milo

04/01/2025

love the 550W output. needed way fewer panels for my system saved on install

m. ivanov

03/08/2025

installed 31 panels and my warehouse runs mostly on solar now

Carter James

02/09/2025

Great panels for the money. bifacial boost is real and noticeable.

carlos

01/22/2025

sunpro makes great stuff. these are commercial grade and built to last.

Wesley

12/26/2024

Heavy panels but quality is outstanding. Getting amazing production numbers.

sang-hoon

10/14/2025

whats the frame made of

A1 SolarStore

Anodized aluminum alloy frame, corrosion-resistant and designed for decades of outdoor use.

Trevor Lane

08/26/2025

Are these good for commercial buildings

A1 SolarStore

Yes! High wattage means fewer panels needed, reducing installation time and roof space requirements.

m. salgado

07/01/2025

are they waterproof

A1 SolarStore

Yes, fully weatherproof with IP68-rated junction boxes designed for decades of outdoor exposure.

Donovan

05/27/2025

How do I clean them ?

A1 SolarStore

Use water and a soft brush. Avoid harsh chemicals or pressure washers. The bifacial design benefits from keeping both sides clean.

yusuf

02/25/2025

can these handle bad weather

A1 SolarStore

Absolutely. They're certified for high wind loads, heavy snow, and hail impact. Built tough for all climates.

Specification

Length	89.72 in
Width	44.65 in
Rated Power Output	550 W
Voltage (VOC)	49.9 V
Maximum String Voltage	1500 V
Number of cells	144
Cell Type	Monocrystalline
Rated Efficiency	21.28%
Connector Type	MC4-compatible
Frame Color	silver
Dimensions LxWxH	89.72 x 44.65 x 1.38 in
Weight	68.34 lbs
Pallet Qty	31
Manufacturer	Sunpro Power
Manufacturer Part #	SPDG550-144M10
Operating Temperatures	−40°F to +185°F
Scope of Application	Solar Panels for Buildings
Use	Commercial Grid-Tie Off-Grid Residential
Warranty	15 years of quality guarantee and 30 years of power warranty

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FAQ

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%.

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

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About product

Sunpro Power SPDG550-144M10 is a PV module fit for both residential and commercial applications. Sunpro Power engineers made the PERC 182 BIFACIAL series durable and efficient while minimizing the amount of useful space required for their operation. The Passivated Emitter Rear Contact (PERC) technology ensures excellent power output. This solar cell type employs an additional reflective layer to absorb more sunlight.

The use of half-cut cell technology is an additional perk. The solar cells of SPDG550-144M10 are half the size of those found in standard panels. Major advantages include reduced power consumption, extended life, and enhanced efficiency in low-light conditions. The efficiency of this model reaches 21.28% — well above the market’s average. And while conventional panels use only one side to absorb photons, bifacial modules employ both sides at the same time. Thanks to the technology, this model can be up to 30% more efficient. Sunpro Power provides a 15-year quality guarantee. Stable power output is also guaranteed —a power warranty will protect you for 30 years.

144 half-cut PERC cells
550 W nameplate capacity
21.28% efficiency
1500 V DC maximum system voltage
MC4-compatible connectors
15 years of quality guarantee and 30 years of power warranty

Increased power and efficiency

PERC technology improves on an already high efficiency of 21.28 percent. The manufacturer created an efficient and highly durable model by adding a robust PID resistance and unique glass lamination on top. SPDG550-144M10 produces 550 W of power under standard test conditions.

Improved efficiency at high temperatures

Greater energy as temperature rises is a mark of a good temperature coefficient. Your panel's efficiency will drop by just -0.34% for every 1.8°F increase over 77°F.

Quality and reliability

SPDG550-144M10 receives multiple quality checks throughout the manufacturing process and is subject to stringent quality and reliability testing. The manufacturing facilities are highly automated, eliminating the risk of human error. Sunpro Power is dedicated to quality, safety, and reliability to ensure you get the very best.

A panel that can handle hail, wind, and snow

This module is weatherproof due to the 1.38" frame manufactured from anodized aluminum alloy and a layer of safety tempered glass. The modules' front and rear sides can withstand loads of 5400 and 2400 Pa, respectively.