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Suntech STP585S-D60/Pmh+
Suntech Brand review

STP585S-D60/Pmh+

585 Wp Monocrystalline Bifacial 70%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 6,539 of 14,129
Compare panels Datasheet PDF
Power (Wp)
585
Typical for its class
Efficiency (%)
20.70
Weak · bottom 7%
Density (Wp/m²)
206.7
Weak · bottom 6%
Temp (%/°C)
-0.340
Typical · median -0.300
Weight (kg)
37.1
Weak · 6.1 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

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

6,600 panels in the 485-685 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 20.70% 22.26% Weak · bottom 7% 10,842
Power density 206.7 222.6 Weak · bottom 6% 11,004
Temperature coefficient -0.340 -0.300 Typical 8,846
Weight per kWp 63.4 52.8 Weak · bottom 1% 13,000
Performance warranty 30 yrs 30 yrs Typical 21
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

Weight-limited structures, roofs where every square metre has to count and tight roof space.

Watch-outs
63.4 kg per kWp

Bottom 1% of the 485-685 W band, against a median of 52.8. Ranked 13,000th in the whole database.

206.7 watts per square metre

Bottom 6% of the 485-685 W band, against a median of 222.6. Ranked 11,004th in the whole database.

20.70% module efficiency

Bottom 7% of the 485-685 W band, against a median of 22.26%. Ranked 10,842nd in the whole database.

Notes from the database
  • At 20.7% efficiency, this panel is 1.1pp below the database median of 21.8%
  • Power density of 206.7 W/m² is 11.4 W/m² below database median (218.1 W/m²) - needs more roof space
  • -0.34%/°C temperature coefficient - 0.04pp worse than database median (-0.30%/°C), expect higher hot weather losses
  • Weight of 37.1 kg is 10.6 kg above database median (26.5 kg) - verify structural support
  • 70% bifaciality enables rear-side power generation, boosting yield by 4-10% on reflective surfaces

Specifications

Open datasheet PDF
Nominal power (Pmax) 585 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.70 % Weak Segment median 22.26%
Vmpp · Impp 34.05 V · 17.19 A Operating point at max power
Voc · Isc 41.25 V · 18.18 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 37.1 kg Weak Weak · 6.1 kg above median
Cells 120 Monocrystalline
Bifaciality 70 % Rear output as a share of front
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 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 85.0 % Equals 497 W guaranteed
Degradation 2.00 → 0.45 % 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
-0.340 %/°C against a segment median of -0.300
-
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
Suntech STP585S-D60/Pmh+ 585 W 20.70% -0.340 37.1 kg You are here
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +4.1 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +3.9 pp
AIKO-A635-MAE72Mw 635 W 24.60% -0.260 27.0 kg Cooler, lighter, +3.9 pp
AIKO-A630-MAH72Dw 630 W 24.40% -0.260 32.5 kg Cooler, lighter, +3.7 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg Cooler, 21 kg lighter, +3.7 pp
STP580S-D60/Pmh+ 580 W 20.50% -0.340 37.1 kg Very close match
STP590S-D60/Pmh+ 590 W 20.80% -0.340 37.1 kg Very close match
STP595S-D60/Pmh+ 595 W 21.00% -0.340 37.1 kg +10 W, +0.3 pp
STP600S-D60/Pmh+ 600 W 21.20% -0.340 37.1 kg +15 W, +0.5 pp
GKA210N120 680 W 24.03% -0.340 28.0 kg +95 W, lighter, +3.3 pp
GKA210N120-675 675 W 23.85% -0.340 28.0 kg +90 W, lighter, +3.2 pp
QN-670HJT-01 670 W 23.70% -0.240 35.5 kg +85 W, cooler, +3.0 pp
GKA210N120-670 670 W 23.67% -0.340 28.0 kg +85 W, lighter, +3.0 pp
QN-665HJT-01 665 W 23.50% -0.240 35.5 kg +80 W, cooler, +2.8 pp
GKA210N120-665 665 W 23.50% -0.340 28.0 kg +80 W, lighter, +2.8 pp
SPDG660-N120M12 660 W 23.32% -0.300 34.2 kg +75 W, cooler, +2.6 pp

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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