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Phono Solar 370W Solar Panel 120 cell PS370M4H-20/UHB Wholesale

$0 /panel
$0.000 /pw
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All Phono Solar products All 370 Watt Panels



Rated Power Output 370 W
Voltage (VOC)41.9 V
Maximum String Voltage 1500V
Number of cells120
Cell TypeMonocrystalline
Rated Efficiency20.31%
Connector TypeMC4
Backsheet Colorblack
Frame Colorblack
Dimensions LxWxH69.09 × 40.87 × 1.38
Pallet Qty31
ManufacturerPhono Solar
Manufacturer Part #PS370M4H-20/UHB
Operating Temperatures −40°F to +185°F
Scope of Application
  • Solar Panels for Commercial
  • Solar Panels for Home
  • Commercial
  • Grid-Tie
  • Off-Grid
  • Residential
Warranty12-year warranty extendable 25 years
Delivery Time 5-7 business days

About product

PS M4H 20UHB is part of the TwinPlus Series — one of the most recent made by Phono Solar. These panels employ cutting-edge technologies to achieve superior efficiency and reliability. The Passivated Emitter Rear Contact (PERC) technology ensures excellent power output. This solar cell type employs an additional reflective layer to absorb more sunlight. 

Another advantage is the half-cut cell technology. PS M4H 20UHB has solar cells half the size of those installed in conventional panels. The main benefits are decreased power loss, improved longevity and better low-light performance. Given its size and weight, PS M4H 20UHB efficiency of 20.31% is quite impressive. Novel design solutions allow this panel to look as well as it performs. This model is just 1.38" in depth and is jet black with a sleek finish. The panel's functionality and durability are not affected by its aesthetic appeal though. Phono Solar provides a 12-year product warranty. Stable power output is also guaranteed — performance warranty will protect you during 25 years. 

  • 120 half-cut PERC cells
  • 370 W nameplate capacity
  • 20.31% efficiency
  • 1500 V DC maximum system voltage
  • MC4 connectors
  • 12 years of product and 25 years of performance warranty

More energy and efficiency

The PERC technology further improves an already excellent efficiency of 20.31 percent. A reliable PID resistance and a unique glass lamination were added by the maker, which ultimately produced a model that was effective and extremely durable. PS M4H 20UHB produces 370 W of power under typical test settings.

Heat-resistant performance

The heat is less of a problem with this module: with one of the industry's lowest temperature coefficients, PS M4H 20UHB loses just 0.36% of efficiency for every 1.8°F over 77°F.

High quality standards

Multiple tests are part of the Phono Solar tight production requirements, which offer the highest level of quality assurance. Because of the facilities' high degree of automation, the business is able to uphold strict standards and minimize the number of warranty claims to an absolute minimum.

Low degradation for increased lifespan

The amount of power output loss experienced by these panels during the first year of operation will not exceed 2%. The average yearly power drop from the second to the 25th year will not surpass 0.50%. After 25 years, the module will still produce more than 86% of its initial output.

Certified for the most challenging environmental conditions

PS M4H 20UHB is resistant to PID, salt, acid and ammonia. It can also withstand up to 5400 Pa mechanical load on the front and 2400 Pa on the back. Such robustness is mainly due to the 1.38" thick anodized aluminum frame and a layer of protective glass.

Outstanding all-black design

The panel features all-black design which looks great on any roof. The manufacturer ensures excellent cell color by special treatment and selection processes. Phono Solar engineers use thinner wires to connect the cells together, and at a distance the surface of the modules appears smooth and uninterrupted.


69.09" x 40.87" x 1.38"


44.75 lb

Reviews & Questions

  • Reviews (3)
  • Questions (3)
Phono Solar is a huge, highly diversified company with solid financials. I opted for the all-black variety of solar panels, so they stand out visually. The energy output is in line with expectations. The item has exceeded my expectations.
Samuel Zox
10/15/2022 01:19 pm
The panels have been up and running for me for a little over a month without a hitch. They're the perfect color match for my roof's dark gray shingles, and they look great there.
Harry Soubeiran
10/15/2022 01:17 pm
In reality, the panels are producing just a little bit more than their rating. A1 solar has the best service and fastest deliveries
10/15/2022 01:11 pm

Leave a review

I am concerned about the loss of amperage on a 12 V system. If I should put the panels 120 feet away from my battery bank?
10/15/2022, 13:08
To mitigate the losses, pick high-quality solar cable and make sure its diameter is right for your system configuration.
Are your panels marine grade fixed , non-flexible monocrystalline?
Pete mletschnig
10/15/2022, 12:53
Yes, these panels are monocrystalline, non-flexible and highly weatherproof.
can I get jest one at time
Bill McPeak
10/15/2022, 12:45
Typically, you can order a single panel and use our pickup option to receive it. However, this doesn't apply to our wholesale section - here we sell solar panels by the pallet. To find and order this very panel, please leave the wholesale section by clicking "Solar panels" at the very top of this page.