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Suntech STP595S-D60/Wmh
Suntech Brand review

STP595S-D60/Wmh

595 Wp Monocrystalline
ComparePV verdict

Middle of its segment, short guarantee

Rank 6,817 of 14,129
Compare panels Datasheet PDF
Power (Wp)
595
Typical for its class
Efficiency (%)
21.00
Weak · bottom 14%
Density (Wp/m²)
210.2
Weak · bottom 15%
Temp (%/°C)
-0.340
Typical · median -0.300
Weight (kg)
31.5
Typical · median 31.5 kg
Warranty (yrs)
25
Weak · bottom 11%

The Ultra X series consists of bifacial half-cut modules engineered to maximize energy yield while minimizing losses caused by current mismatch. The panels are built on large D-type silicon wafers using PERC cell technology combined with high-density cell packaging and multi-busbar technology, which shortens the lateral current path and effectively reduces resistive losses. Suntech's proprietary current sorting process further limits discrepancies between individual cells, resulting in higher and more stable overall system power output. The bifacial design allows the module to capture additional light reflected from the ground, boosting installation productivity without increasing the footprint. The series also stands out for its excellent low-light performance - on cloudy days, in the morning, or at sunset, the panels continue to generate noticeably more energy than conventional designs. The modules have passed extended wind and snow load resistance testing, making them a solid choice for installations in demanding climates, including coastal, farmland, and desert environments. Low annual power degradation combined with a 30-year linear warranty make Ultra X a fitting solution for investors in commercial projects and large-scale ground-mount installations who expect predictable returns throughout the system's operating lifetime.

Ranking

6,324 panels in the 495-695 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 21.00% 22.25% Weak · bottom 14% 9,828
Power density 210.2 222.5 Weak · bottom 15% 9,740
Temperature coefficient -0.340 -0.300 Typical 8,846
Weight per kWp 52.9 52.8 Typical 6,715
Performance warranty 25 yrs 30 yrs Weak · bottom 11% 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 3 caution
Best for

Commercial, utility-scale, hot-climate, cold-climate and shaded-installations.

Not ideal for

Owners who want a long output guarantee, tight roof space and roofs where every square metre has to count.

Watch-outs
25 year performance warranty

Bottom 11% of the 495-695 W band, against a median of 30 yrs.

21.00% module efficiency

Bottom 14% of the 495-695 W band, against a median of 22.25%.

210.2 watts per square metre

Bottom 15% of the 495-695 W band, against a median of 222.5.

Notes from the database
  • Efficiency of 21.0% is 0.8pp below the database median (21.8%)
  • At 210.2 W/m², this panel generates 7.9 W/m² less per unit area than database median (218.1 W/m²)
  • -0.34%/°C temperature coefficient - 0.04pp worse than database median (-0.30%/°C), expect higher hot weather losses
  • Weight of 31.5 kg is 5.0 kg above database median (26.5 kg) - verify structural support
  • Ranked #9828 out of 14129 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 595 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.00 % Weak Segment median 22.25%
Vmpp · Impp 34.45 V · 17.28 A Operating point at max power
Voc · Isc 41.65 V · 18.27 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2172×1303×35 mm · 2.83 m² of roof
Weight 31.5 kg Typical Typical · median 31.5 kg
Cells 144 Monocrystalline
Coefficient Pmax -0.340 %/°C Typical median -0.300 of its segment
Coefficient Voc · Isc -0.260 · 0.050 %/°C
NOCT 42 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Weak bottom 11% · median 30 yrs
End-of-warranty output 84.8 % Equals 488 W guaranteed
Degradation 2.00 → 0.55 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Suntech in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 595 Wp appear here. The rest cover the whole series.

Industry-leading Warranty Industry-leading Warranty Whole series Current-Voltage & Power-Voltage Curve (600S) Current-Voltage & Power-Voltage Curve (600S) Whole series

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
-

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

Heat losses
-0.340 %/°C against a segment median of -0.300
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Suntech STP595S-D60/Wmh 595 W 21.00% -0.340 31.5 kg You are here
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +50 W, cooler, +4.0 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +3.8 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, +3.8 pp, +5 yr warranty
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +3.6 pp
AIKO-A635-MAE72Mw 635 W 24.60% -0.260 27.0 kg Cooler, +3.6 pp, +5 yr warranty
STP580S-D60/Pmh+ 580 W 20.50% -0.340 37.1 kg Heavier, -0.5 pp, +5 yr warranty
STP585S-D60/Pmh+ 585 W 20.70% -0.340 37.1 kg Heavier, -0.3 pp, +5 yr warranty
STP590S-D60/Pmh+ 590 W 20.80% -0.340 37.1 kg Heavier, +5 yr warranty
STP600S-D60/Pmh+ 600 W 21.20% -0.340 37.1 kg Heavier, +5 yr warranty
GKA210N120 680 W 24.03% -0.340 28.0 kg +85 W, +3.0 pp, +5 yr warranty
GKA210N120-675 675 W 23.85% -0.340 28.0 kg +80 W, +2.9 pp, +5 yr warranty
QN-670HJT-01 670 W 23.70% -0.240 35.5 kg +75 W, cooler, +2.7 pp
GKA210N120-670 670 W 23.67% -0.340 28.0 kg +75 W, +2.7 pp, +5 yr warranty
QN-665HJT-01 665 W 23.50% -0.240 35.5 kg +70 W, cooler, +2.5 pp
GKA210N120-665 665 W 23.50% -0.340 28.0 kg +70 W, +2.5 pp, +5 yr warranty
SPDG660-N120M12 660 W 23.32% -0.300 34.2 kg +65 W, +2.3 pp, +5 yr warranty

Found 497 panels of the same or similar size to this one, within ±10 mm. See them here Found 502 panels of the same or similar size to this one, within ±25 mm. See them here Found 502 panels of the same or similar size to this one, within ±50 mm. See them here Found 502 panels of the same or similar size to this one, within ±100 mm. See them here

About the Ultra X series

6 answered

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

What is the maximum power output of a single Suntech Ultra X panel?
Suntech Ultra X panels reach a maximum power output of up to 600 Wp, placing them among large-format modules built on 210 mm wafers. This high power comes from densely packed D-type PERC cells combined with half-cut technology, which reduces resistive losses. As a result, fewer panels are needed to reach a given system capacity, lowering installation costs and the number of mounting brackets required on roofs or ground-mount racking.
Are Suntech Ultra X panels bifacial, and how much extra energy does that generate?
Yes, Ultra X modules use a bifacial design that captures light reflected off the ground through the rear side of the panel. Depending on surface albedo (light gravel, snow, white roofing), the additional energy yield can reach up to 25% compared to a standard monofacial module. The effect is most noticeable in ground-mount installations and utility-scale PV farms, where panels are installed above light-colored surfaces.
What is multi-busbar technology and current sorting in the Ultra X series?
Multi-busbar technology increases the number of thin conductive paths across the cell surface, shortening the current path and reducing resistive losses. Suntech also applies proprietary current sorting, grouping cells with closely matched electrical parameters within the same module. This limits mismatch loss, allowing the whole panel to operate closer to its theoretical maximum power instead of being held back by its weakest cell.
What warranty covers Suntech Ultra X panels - product and power?
Suntech backs the Ultra X series with a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty. This means a guaranteed, evenly distributed performance decline over time rather than the stepped degradation seen in older warranty structures. For investors in commercial and utility-scale projects, this is an important factor when calculating long-term return on investment (ROI).
Is the Ultra X series suitable for PV farms in harsh climate conditions?
Yes, Ultra X modules have passed extended wind load and snow load resistance testing, making them suitable for PV farms located on coastlines, open terrain, or desert regions with wide temperature swings. A robust frame construction combined with half-cut technology, which is less prone to microcracks under mechanical stress, results in longer, more reliable operation in harsh climate conditions.
Does Suntech's Tier 1 manufacturer status guarantee investment security over 30 years?
Suntech is listed as a Tier 1 manufacturer (BloombergNEF), reflecting documented financial stability, in-house production lines, and a track record in bankable projects financed by banks. For investors, this means lower risk related to supply quality and greater confidence in the 30-year power warranty, since the manufacturer has the real operational backing needed to honor service commitments over the entire lifespan of the installation.
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