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Trina Solar TSM-NEG18RC.27-505
Trina Solar Brand review

TSM-NEG18RC.27-505

505 Wp TOPCon Bifacial 80%
ComparePV verdict

Light for its output, no clear weak spot

Rank 6,023 of 14,005
Compare panels Datasheet PDF
Power (Wp)
505
Typical for its class
Efficiency (%)
22.70
Typical · median 22.73%
Density (Wp/m²)
227.1
Typical · median 227.4
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
23.5
Strong · 3.5 kg below median
Warranty (yrs)
30
Typical · median 30 yrs

The Trina Solar Vertex S+ (TSM-NEG18RC.27 490-515W) series was designed for maximum yield per square meter of roof - without complicating the installation project. The key difference is the use of n-type i-TOPCon cells, which handle performance degradation over time better and operate more stably under varying weather conditions, translating to a more predictable energy yield over years. The dual-glass construction enhances resistance to moisture, high temperatures, and microcracks, while simultaneously improving module safety in demanding locations.

The Clear Black version allows for a modern, more cohesive visual effect on the roof, which is important for representative buildings and locations where aesthetics matter. A key advantage is bifaciality, enabling the module to utilize light coming from the back, increasing yield in favorable mounting setups. This series is a practical choice for C&I installations and demanding flat roofs - where longevity, compatibility with standard inverters, and a long operational lifespan are key, backed by an extended warranty.

Ranking

432 panels in the segment TOPCon 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.70% 22.73% Typical 3,307
Power density 227.1 227.4 Typical 3,312
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 46.5 52.4 Strong · top 16% 1,199
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Price offers

1 from shops we track
Shop Country Price Per kWp Stock Offer updated Link to shop
Sklep Soltech Poland 332.64 zł net 658.69 zł/kWp Not stated 8h ago Visit shop

Signals from the data

1 positive · 0 caution
Best for

Commercial, shaded-installations and hot-climate.

Strengths
46.5 kg per kWp

Top 16% of the TOPCon 500-550 W segment, against a median of 52.4.

Notes from the database
  • Efficiency of 22.7% matches the TOPCon 500-550W median
  • Power density of 227.1 W/m² matches the TOPCon 500-550W median
  • Temperature coefficient of -0.29%/°C matches the TOPCon 500-550W median
  • At 23.5 kg, this panel is 3.5 kg lighter than TOPCon 500-550W median (27.0 kg) - easier handling during installation
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface

Specifications

Open datasheet PDF
Nominal power (Pmax) 505 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.70 % Typical Segment median 22.73%
Vmpp · Impp 33.50 V · 15.09 A Operating point at max power
Voc · Isc 40.30 V · 15.89 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1961×1134×30 mm · 2.22 m² of roof
Weight 23.5 kg Strong Strong · 3.5 kg below median
Cells 108 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.240 · 0.040 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 441 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Trina Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 505 Wp appear here. The rest cover the whole series.

Performance Warranty Performance Warranty Whole series I-V Curves of PV Module (505W) I-V Curves of PV Module (505W) 505 W P-V Curves of PV Module (505W) P-V Curves of PV Module (505W) 505 W

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
-0.290 %/°C against a segment median of -0.290
-
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
Trina Solar TSM-NEG18RC.27-505 505 W 22.70% -0.290 23.5 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, +2.3 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +2.1 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, +2.0 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +50 W, cooler, +1.9 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +1.8 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, +1.8 pp
TSM-NEG18R.28-475 475 W 21.40% -0.290 23.5 kg -30 W, -1.3 pp
TSM-NEG18R.28-480 480 W 21.60% -0.290 23.5 kg -25 W, -1.1 pp
TSM-NEG18R.25-485 485 W 21.80% -0.290 23.5 kg -20 W, -0.9 pp
TSM-NEG18RC.27-490 490 W 22.00% -0.290 23.5 kg -15 W, -0.7 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +55 W, cooler, +2.1 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +45 W, lighter, +1.7 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +35 W, cooler, +1.7 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +35 W, cooler, +1.7 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +40 W, heavier, +1.6 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg +40 W, cooler, +1.5 pp

Found 471 panels of the same or similar size to this one, within ±10 mm. See them here Found 508 panels of the same or similar size to this one, within ±25 mm. See them here Found 662 panels of the same or similar size to this one, within ±50 mm. See them here Found 1471 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Are Trina Vertex S+ TSM-NEG18RC.27 panels suitable for flat-roof C&I installations?
Yes, the series was designed for large commercial and industrial (C&I) installations and flat roofs. The dual-glass construction improves resistance to microcracks and moisture, while the standard 1961x1134 mm footprint fits typical mounting systems and string inverters. With up to 515 Wp per module, fewer panels are needed to reach the target system capacity, lowering racking and labor costs.
How do the n-type TOPCon cells in the Vertex S+ differ from older PERC cells?
TOPCon (n-type) cells degrade more slowly over time and are less prone to LID/LeTID effects than conventional p-type PERC cells. In practice this means more stable energy output throughout the module's lifetime, backed by a 30-year power warranty guaranteeing at least 87.4% of rated power in the final year. TOPCon cells also perform better at higher operating temperatures.
What warranty comes with Trina Solar Vertex S+ TSM-NEG18RC.27 panels?
The manufacturer provides a 15-year product warranty plus a 30-year power output warranty, guaranteeing at least 87.4% of nominal power after 30 years. This is an extended term compared to earlier Trina Solar series, making it an attractive choice for investors planning long-term returns, such as in commercial installations.
What does bifacial technology in the Vertex S+ modules do, and when does it pay off?
Bifacial modules have active front and rear sides, allowing them to capture additional light reflected from the ground - a light-colored roof, gravel, or snow. The TSM-NEG18RC.27 has a bifaciality factor of around 80%. The biggest energy gain comes from ground-mounted arrays or flat-roof installations with proper clearance beneath the module, rather than standard flush-mounted pitched-roof setups.
Does the Clear Black version affect the Vertex S+ panel's efficiency or power output?
No, Clear Black is an aesthetic variant with a black frame and darker backsheet that doesn't change the module's electrical parameters - power, efficiency, and warranties remain identical to the standard version. It's a popular choice for prestige buildings where a uniform, sleek look from street level matters.
What are the dimensions and weight of the TSM-NEG18RC.27, and does it require two-person installation?
The module measures approximately 1961x1134x30 mm and weighs 23.5 kg. Due to its large format and dual-glass construction, the manufacturer and installers recommend two-person handling, especially on roofs with limited access. This size is typical for commercial installations, where maximizing power density on available roof space while staying compatible with standard racking systems is a priority.
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