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JA Solar Brand review

JAM60D10-355/TB/1500V

355 Wp N-type Bifacial 75%
ComparePV verdict

Warranty pick, no clear weak spot

Rank 12,377 of 14,129
Compare panels Datasheet PDF
Power (Wp)
355
Weak · bottom 17%
Efficiency (%)
20.60
Typical · median 20.00%
Density (Wp/m²)
206.4
Typical · median 200.4
Temp (%/°C)
-0.310
Typical · median -0.320
Weight (kg)
22.0
Typical · median 22.0 kg
Warranty (yrs)
30
Strong · top 19%

JA Solar JAM60D10 335-355/TB/1500V modules are designed for reliable operation in installations where predictable yield and resilience to typical operational issues are key. The application of half-cut construction (120 cells) helps minimize losses and better handle partial shading, which often determines profitability in Polish conditions. The refined connection architecture and safety features translate to high reliability and stable module string operation.

For installers and designers, system compatibility with 1500 V installations will also be important, facilitating the construction of longer strings in commercial and industrial projects. The modules feature a watertight junction box with IP68 rating, reducing the risk of problems in harsh weather conditions. This makes them an excellent choice for commercial rooftops, PV farms, and demanding residential installations where durability and consistent quality take precedence over "spec sheet parameters".

Ranking

51 panels in the segment N-type 350-400 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.60% 20.00% Typical 11,172
Power density 206.4 200.4 Typical 11,092
Temperature coefficient -0.310 -0.320 Typical 8,069
Weight per kWp 62.0 62.0 Typical 12,816
Performance warranty 30 yrs 25 yrs Strong · top 19% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 2 caution
Best for

Residential, commercial and shaded-installations.

Strengths
30 year performance warranty

Top 19% of the N-type 350-400 W segment, against a median of 25 yrs.

What owners get
Efficiency up to 20.6% - well above segment peers

Peak module efficiency of 20.6% clearly outperforms peer comparables in this segment: Runtech RT-340-355P (18.49%), Solitek SOLID Solrif (18.0%), and Hiwatt HW-P372H (17.8%). The gap of +2.1-2.8 percentage points translates to fewer modules required per kilowatt of installed capacity on a given roof area.

N-type cells: lower LID and better temperature coefficient

N-type cells deliver a lower power temperature coefficient Pmax of -0.31%/°C versus a typical -0.35%/°C for PERC, yielding approximately 1.4% higher output at real-world module temperatures of 65-70°C. Additionally, N-type cells do not exhibit classic LID (Light-Induced Degradation), which can reduce PERC module output by 1-2% in the first year of operation.

Bifacial double-glass with half-cut cells (120 cells)

The TB (Twin glass Bifacial) design captures energy from the module's rear side - typical bifacial gain in ground-mounted systems with a light-colored albedo surface ranges from 5-15%. Dual-tempered glass improves mechanical resistance and eliminates backsheet degradation risk. The half-cut layout (120 cells) reduces resistive losses and limits the impact of partial shading on the full string.

30-year linear power warranty (≥84% after 30 years)

JA Solar guarantees ≥84% of nominal power after 30 years of operation - a longer horizon than the then-prevailing industry standard of 25 years for most PERC modules. For projects where LCOE is calculated over a 25-30 year period, this directly reduces financial risk and facilitates bankable project financing.

1500V system voltage: longer strings, lower BoS costs

Support for 1500V system voltage enables longer DC strings in C&I and utility-scale PV projects, directly reducing BoS costs (DC cabling, string combiners) and simplifying system design. The IP68-rated junction box further reduces the risk of failures under challenging weather conditions.

Trade-offs
Series discontinued since 2022

The JAM60D10 335-355/TB/1500V series ended production in 2022. Availability of new modules is limited to distributor stock. Expanding an installation after 2024 may make it difficult or impossible to match the electrical parameters of existing modules. Warranty service and spare part availability will become increasingly uncertain over time.

12-year product warranty - below 2026 market standard

In 2026, leading Tier-1 manufacturers (LONGi, Jinko Tiger Neo, JA Deep Blue 4.0) offer 25-year product warranties as standard. The JAM60D10 series covers only 12 years, meaning that for a planned 25-30-year investment horizon, manufacturer protection lapses well before mid-life. For new project procurement, this gap may favor more recent series.

Notes from the database
  • At 20.6% efficiency, this panel is 1.1pp above typical N-type 0-400W modules (median: 19.5%)
  • Power density of 206.4 W/m² packs 11.5 W/m² more into the same footprint vs N-type 0-400W median (194.9 W/m²)
  • Temperature coefficient of -0.31%/°C matches the N-type 0-400W median
  • Bifacial design (75% factor) captures reflected light - adds 4-11% yield on ground-mount or white roof
  • In the top 79% for efficiency among all N-type panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 355 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.60 % Typical Segment median 20.00%
Vmpp · Impp 35.86 V · 9.90 A Operating point at max power
Voc · Isc 42.39 V · 10.42 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1711×1005×30 mm · 1.72 m² of roof
Weight 22.0 kg Typical Typical · median 22.0 kg
Cells 120 · N-type Monocrystalline
Bifaciality 75 % Rear output as a share of front
Coefficient Pmax -0.310 %/°C Typical median -0.320 of its segment
Coefficient Voc · Isc -0.250 · 0.039 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Strong top 19% · median 25 yrs
End-of-warranty output 84.0 % Equals 298 W guaranteed
Degradation 1.50 → 0.50 % First year, then annual

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.310 %/°C against a segment median of -0.320
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
JA Solar JAM60D10-355/TB/1500V 355 W 20.60% -0.310 22.0 kg You are here
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Lighter, +2.5 pp, -5 yr warranty
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Lighter, +2.5 pp, -5 yr warranty
GKA210M320W 320 W 23.00% - 16.2 kg -35 W, lighter, +2.4 pp
GKA210M340W 340 W 23.00% - 16.2 kg -15 W, lighter, +2.4 pp
GKA210M360W 360 W 23.00% - 16.2 kg Lighter, +2.4 pp
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg +25 W, lighter, +2.4 pp
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +45 W, lighter, +2.4 pp
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg +45 W, lighter, +2.4 pp
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg +25 W, lighter, +2.4 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg +45 W, +2.0 pp, +10 yr warranty
JAM60D10-320/MB/1500V 320 W 18.60% -0.354 22.0 kg -35 W, hotter, -2.0 pp
JAM60D10-325/MB/1500V 325 W 18.90% -0.354 22.0 kg -30 W, hotter, -1.7 pp
JAM60D10-330/MB/1500V 330 W 19.20% -0.354 22.0 kg -25 W, hotter, -1.4 pp
JAM60D10-335/TB/1500V 335 W 19.50% -0.310 22.0 kg -20 W, -1.1 pp
JAM60D10-340/TB/1500V 340 W 19.80% -0.310 22.0 kg -15 W, -0.8 pp
JAM60D10-345/TB/1500V 345 W 20.10% -0.310 22.0 kg -10 W, -0.5 pp
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg +85 W, cooler, +2.3 pp

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About the JAM60D10 335-355/TB/1500V series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

Is the JA Solar JAM60D10 335-355/TB/1500V series still available for purchase?
The JAM60D10 335-355/TB/1500V series has been discontinued and is no longer regularly stocked by solar distributors. Occasional clearance or secondary-market units may appear, but sourcing additional panels to expand or repair an existing system will be difficult. Buyers should consider a current JA Solar series with comparable specifications instead.
What warranty does JA Solar provide for the JAM60D10 355W modules?
JA Solar offers a 12-year product warranty covering material and workmanship defects. The linear power warranty runs for 30 years, guaranteeing at least 84% of nominal power output at end of life. In year one, output is guaranteed at a minimum of 97.5%. This is a solid warranty package from a Tier 1 manufacturer and supports reliable long-term yield forecasting for commercial and residential projects.
What does the TB designation mean in JAM60D10, and is the panel bifacial?
TB stands for Twin-glass Bifacial. The module uses two glass layers instead of a rear backsheet and captures light from both the front and rear surfaces. With a reflective ground cover such as light gravel, concrete, or snow, bifacial gain typically adds 5-15% extra energy yield above the rated front-side power. The dual-glass construction also improves mechanical strength and eliminates PID risk.
Are the JAM60D10 335-355/TB modules suitable for commercial rooftop and utility-scale PV projects?
Yes, the series is engineered for commercial and industrial applications. The 1500 V system voltage rating enables longer strings, reducing BoS costs for large-scale projects. The IP68-rated junction box ensures reliable operation in demanding weather conditions. The half-cut 120-cell layout minimizes mismatch losses caused by partial shading, which is particularly relevant for rooftop installations with obstructions.
How do the N-type JAM60D10 modules perform in winter and low-temperature conditions?
The N-type cells used in this series have a lower temperature coefficient of Pmax (approx. -0.31%/°C) compared to conventional P-type PERC modules (-0.35 to -0.40%/°C). This means less power loss on cold, sunny days typical of Central European winters. N-type cells are also inherently resistant to LID (Light Induced Degradation), maintaining higher output throughout the module's operational lifetime.
What are the dimensions and weight of the JA Solar JAM60D10 355/TB/1500V panel - will it fit on a standard commercial rooftop?
The module measures approximately 1711×1005×30 mm and weighs around 22 kg. This footprint is comparable to a standard 60-cell format, making it compatible with most racking systems used on industrial and commercial buildings. Because the twin-glass (TB) construction adds some weight over backsheet equivalents, a structural load assessment of the roof is recommended before installation.
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