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Jetion Brand review

JT515SLt(B)

515 Wp TOPCon Bifacial 85%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 7,911 of 14,129
Compare panels Datasheet PDF
Power (Wp)
515
Typical for its class
Efficiency (%)
21.70
Weak · bottom 11%
Density (Wp/m²)
216.9
Weak · bottom 10%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
31.1
Weak · 4.1 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The JT SLt(B) series comprises dual-glass, bifacial photovoltaic modules from Jetion built around N-type TOPCon cells, combining high conversion efficiency with a low long-term degradation rate. The use of half-cut cell technology together with a multi-busbar (MBB) design reduces resistive losses and lowers the risk of hot spots, resulting in more stable module performance even under partial shading. The bifacial dual-glass construction lets the panel capture reflected radiation from the ground, generating extra energy from its rear side - a particularly cost-effective solution on light-colored surfaces, gravel roofs, or ground-mounted installations. The glass-glass build increases mechanical durability and extends the panel's service life, helping lower servicing costs over the system's lifetime and improving overall LCOE. The JT SLt(B) series is rated for 1500V DC systems, simplifying string design and reducing BoS costs in larger installations. Thanks to these features, the modules suit commercial and utility-scale projects as well as extensive residential installations where maximizing energy yield from limited roof space matters. The manufacturer backs the modules with a long-term product warranty and a linear power performance warranty, reflecting the durability of the technology used.

Ranking

435 panels in the segment TOPCon 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.70% 22.74% Weak · bottom 11% 7,485
Power density 216.9 227.4 Weak · bottom 10% 7,499
Temperature coefficient -0.290 -0.290 Typical 2,220
Weight per kWp 60.4 52.4 Weak · bottom 2% 12,546
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 6 caution
Best for

Commercial, utility-scale and shaded-installations.

Not ideal for

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

Watch-outs
60.4 kg per kWp

Bottom 2% of the TOPCon 500-550 W segment, against a median of 52.4. Ranked 12,546th in the whole database.

216.9 watts per square metre

Bottom 10% of the TOPCon 500-550 W segment, against a median of 227.4.

21.70% module efficiency

Bottom 11% of the TOPCon 500-550 W segment, against a median of 22.74%.

What owners get
N-type TOPCon cells with half-cut and MBB

N-type TOPCon cells in a half-cut layout with a multi-busbar (MBB) grid reduce resistive losses and hot-spot risk, delivering module efficiency of up to 22.1% and lower LID degradation than older P-type PERC technology.

Bifacial dual-glass construction

The dual-glass bifacial design captures albedo reflected from the ground, generating additional energy from the rear side - particularly cost-effective on bright gravel roofs and ground-mount installations, where real-world yield gains can reach several to low double-digit percentage points versus monofacial panels.

1500V DC system compatibility

Panels rated for 1500V DC system voltage enable longer module strings, reducing the number of inverters, cabling and mounting structures, which lowers BoS costs in larger commercial and industrial installations.

30-year linear power warranty

The manufacturer offers a 30-year linear power warranty, matching standards set by leading tier-1 manufacturers such as Jinko Solar (Tiger Neo) and VSUN, confirming the long-term durability of the TOPCon technology used.

BNEF Tier 1 certified manufacturer

Jetion Solar (founded in 2004) is listed on the BloombergNEF Tier 1 Module Maker Tiering System, confirming project bankability and easing non-recourse financing from commercial banks.

Trade-offs
Efficiency below the 525W segment leaders

The series' maximum efficiency is 22.1%, while comparable 525W competitors reach notably higher figures - Jolywood JW-HD108N-R2 Black Series at 23.6% and Jinko Tiger Neo 54HL4M-BDV at 23.61%. This means the Jetion panel occupies more roof area for the same power output.

Shorter product warranty than market leaders

The 12-year product warranty is shorter than the 25-year standard now offered by leading tier-1 manufacturers (e.g., Jinko Solar, LONGi), which may be a meaningful factor when comparing total cost of risk (TCO) in long-horizon projects.

Discontinuous BNEF Tier 1 track record

Jetion Solar re-entered the BloombergNEF Tier 1 list only in Q2 2024 after a prior gap in classification, indicating a less continuous bankability track record compared to manufacturers like Jinko Solar, which have held Tier 1 status uninterrupted for many years.

Notes from the database
  • Module efficiency of 21.7% is 1.0pp below average for TOPCon 500-550W panels (median: 22.7%)
  • Power density of 216.9 W/m² is 10.5 W/m² below TOPCon 500-550W median (227.4 W/m²) - needs more roof space
  • Temperature coefficient of -0.29%/°C matches the TOPCon 500-550W median
  • Weight of 31.1 kg is 4.1 kg above TOPCon 500-550W median (27.0 kg) - verify structural support
  • 85% bifaciality enables rear-side power generation, boosting yield by 4-13% on reflective surfaces

Specifications

Open datasheet PDF
Nominal power (Pmax) 515 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.70 % Weak Segment median 22.74%
Vmpp · Impp 38.35 V · 13.43 A Operating point at max power
Voc · Isc 46.25 V · 14.26 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2094×1134×30 mm · 2.37 m² of roof
Weight 31.1 kg Weak Weak · 4.1 kg above median
Cells 132 · TOPCon Monocrystalline
Bifaciality 85 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.240 · 0.045 %/°C
NOCT 43 °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 87.4 % Equals 450 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Jetion in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 515 Wp appear here. The rest cover the whole series.

CNBM Jetion Linear Power Warranty CNBM Jetion Linear Power Warranty Whole series JT515SLt(B) IV Curves at Different Irradiance JT515SLt(B) IV Curves at Different Irradiance 515 W JT515SLt(B) IV Curves at Different Temperatures JT515SLt(B) IV Curves at Different Temperatures 515 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
Jetion JT515SLt(B) 515 W 21.70% -0.290 31.1 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +3.3 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +3.1 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +45 W, lighter, +3.1 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +3.0 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg Cooler, lighter, +3.0 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +40 W, lighter, +2.9 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +2.8 pp
JT505SLt(B) 505 W 21.30% -0.290 31.1 kg -10 W, -0.4 pp
JT510SLt(B) 510 W 21.50% -0.290 31.1 kg Very close match
JT520SLt(B) 520 W 21.90% -0.290 31.1 kg Very close match
JT525SLt(B) 525 W 22.10% -0.290 31.1 kg +10 W, +0.4 pp
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +75 W, lighter, +2.1 pp
GKA120N-PRO-585W 585 W 23.62% -0.300 26.7 kg +70 W, lighter, +1.9 pp
BGO 580 580 W 23.50% -0.290 26.0 kg +65 W, lighter, +1.8 pp
GKA120N-PRO-580W 580 W 23.42% -0.300 26.7 kg +65 W, lighter, +1.7 pp

Found 405 panels of the same or similar size to this one, within ±10 mm. See them here Found 416 panels of the same or similar size to this one, within ±25 mm. See them here Found 433 panels of the same or similar size to this one, within ±50 mm. See them here Found 961 panels of the same or similar size to this one, within ±100 mm. See them here

About the JT SLt(B) series

6 answered

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

How does the N-type TOPCon technology used in JT SLt(B) differ from classic PERC panels?
N-type TOPCon cells offer higher conversion efficiency and a significantly lower annual degradation rate than traditional P-type PERC cells. Thanks to an additional passivation layer, they reduce recombination losses, resulting in higher first-year energy yield and more stable power output over the following years, particularly noticeable after 10-15 years of system operation.
Does the bifacial design of JT SLt(B) panels actually increase energy production?
Yes, the bifacial construction with double glass allows the module to capture radiation reflected off the ground on its rear side. The additional energy gain depends on the albedo of the surface beneath the installation - on light gravel, white roofing membrane, or snow it can add anywhere from a few to over a dozen percent more energy compared to a monofacial panel of the same nominal power.
What is the maximum power rating of the JT SLt(B) series and what installations is it suited for?
The most powerful variants in the series reach up to 525 Wp. High power combined with compact dimensions makes them suitable for large commercial and industrial installations, where maximizing power per hectare matters, as well as for extensive residential installations on large roofs, where fewer modules delivering high yield is preferred.
What warranty covers Jetion JT SLt(B) panels?
The manufacturer provides a 12-year product warranty covering material and workmanship defects, along with a 30-year linear power warranty guaranteeing a minimum percentage of retained nominal power over subsequent years. These are extended terms compared to standard PERC panels, reflecting the higher durability of TOPCon technology and glass-glass construction.
Are JT SLt(B) panels compatible with 1500V DC systems?
Yes, the JT SLt(B) series is designed for operation in 1500V DC systems, enabling longer module strings with fewer inverters and less cabling. In practice this means lower BoS (Balance of System) costs in larger ground-mount and industrial installations compared to older 1000V systems.
Does the glass-glass construction of bifacial modules require special mounting compared to standard panels?
Glass-glass panels are somewhat heavier than standard modules with a rear backsheet, so it's worth checking the load capacity of the mounting structure before installation. They also require clearance beneath the module or a light-colored ground surface to benefit from the bifacial effect. Otherwise, installation proceeds similarly to typical panels, while the extra glass layer improves mechanical resistance and extends the system's lifespan.
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