Skip to main content
Jetion Brand review

JT440SEt(L)

440 Wp TOPCon
ComparePV verdict

Light for its output, short guarantee

Rank 10,585 of 14,129
Compare panels Datasheet PDF
Power (Wp)
440
Typical for its class
Efficiency (%)
22.50
Strong · top 9%
Density (Wp/m²)
225.7
Strong · top 4%
Temp (%/°C)
-0.300
Typical · median -0.290
Weight (kg)
13.1
Strong · 8.9 kg below median
Warranty (yrs)
20
Weak · bottom 1%

The JT SEt(L) 420-440W series is built around 108 N-type TOPCon half-cut cells with a multi-busbar grid, delivering high conversion efficiency and stable performance even under diffuse light conditions. Thanks to N-type cell technology, these panels feature low LID/LETID degradation, retaining strong output across their entire service life rather than losing performance sharply in the early years. The manufacturer has also addressed PID resistance by optimizing the cell production process and using advanced encapsulation materials, which combined with double 100% EL inspection ensures high reliability and minimizes the risk of micro-cracks or hidden defects. This makes the series especially appealing for projects on roofs with limited load-bearing capacity or in locations with less-than-ideal solar exposure, where every extra kilowatt-hour matters. The series also stands out for its lightweight construction, which simplifies transport and installation and reduces labor costs compared to conventional dual-glass modules. The JT SEt(L) 420-440W is designed for installers and developers seeking a balance of efficiency, durability, and ease of deployment across both commercial and residential installations.

Ranking

1,220 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.50% 22.00% Strong · top 9% 4,281
Power density 225.7 220.2 Strong · top 4% 3,908
Temperature coefficient -0.300 -0.290 Typical 6,152
Weight per kWp 29.8 51.5 Strong · top 1% 133
Performance warranty 20 yrs 30 yrs Weak · bottom 1% 13,920
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

8 positive · 3 caution
Best for

Residential and commercial.

Not ideal for

Owners who want a long output guarantee.

Strengths
29.8 kg per kWp

Top 1% of the TOPCon 400-450 W segment, against a median of 51.5. Ranked 133rd in the whole database.

225.7 watts per square metre

Top 4% of the TOPCon 400-450 W segment, against a median of 220.2. Ranked 3,908th in the whole database.

22.50% module efficiency

Top 9% of the TOPCon 400-450 W segment, against a median of 22.00%. Ranked 4,281st in the whole database.

Watch-outs
20 year performance warranty

Bottom 1% of the TOPCon 400-450 W segment, against a median of 30 yrs. Ranked 13,920th in the whole database.

What owners get
N-type TOPCon cells with dual EL inspection

108 half-cut N-type TOPCon cells combined with a dual 100% electroluminescence (EL) inspection and PID-resistant cell processing deliver a low LID/LETID degradation rate and minimize the risk of microcracks compared to conventional PERC modules.

22.5% efficiency near the top of its peer group

The 22.5% efficiency matches JA Solar's JAM54D40 (22.5%) and exceeds Lina Energy's LEPV 132 ULTRA PREMIUM (22.37%) at the same 440 Wp power class, though it trails Luxor Solar's ECO LINE (22.86%) - placing it in the upper half of comparable offerings.

Tier-1 manufacturer with BNEF certification

Jetion Solar has operated since 2004 and has been confirmed as Tier-1 on the BloombergNEF Module Maker Tiering System, reducing bankability risk and easing project financing through banks and funds.

Lightweight design eases installation

The module weighs approximately 13.1 kg, lighter than typical dual-glass modules of comparable power - this simplifies transport and mounting, lowering labor costs, particularly on roofs with limited load-bearing capacity.

Low temperature coefficient

The Pmax temperature coefficient of -0.30%/°C is favorable versus conventional PERC modules (typically -0.35% to -0.40%/°C), translating into a higher energy yield in hot climates and during summer months.

Trade-offs
Production discontinued

The JT SEt(L) 420-440W series, launched in 2022, has been discontinued. This implies limited future availability of spare parts and warranty servicing, a meaningful risk given the 20-30 year expected lifetime of PV installations.

Warranty below current N-type TOPCon standard

The 10-year product and 20-year power warranty (89% power retention at 20 years per manufacturer data) is noticeably shorter than what has become standard for N-type TOPCon modules today, where 12-15 year product and 25-30 year linear power warranties with over 87% retention at 30 years are now common.

Notes from the database
  • Efficiency of 22.5% matches the TOPCon 400-450W median
  • At 225.7 W/m² power density, this panel generates 5.5 W/m² more per unit area than TOPCon 400-450W median (220.2 W/m²)
  • At -0.30%/°C, hot weather performance is typical for TOPCon 400-450W panels
  • 13.1 kg weight - 8.9 kg lighter than TOPCon 400-450W median (22.0 kg), reducing installation effort
  • #4281 for efficiency, #6152 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 440 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.50 % Strong Segment median 22.00%
Vmpp · Impp 32.00 V · 13.75 A Operating point at max power
Voc · Isc 38.60 V · 14.49 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1721×1133×19 mm · 1.95 m² of roof
Weight 13.1 kg Strong Strong · 8.9 kg below median
Cells 108 · TOPCon Monocrystalline
Coefficient Pmax -0.300 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°C
NOCT 42 °C At 800 W/m², 20 °C ambient
Product warranty 10 years Hardware defects only
Performance warranty 20 years Weak bottom 1% · median 30 yrs
End-of-warranty output 89.0 % Equals 370 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
-

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

Heat losses
-0.300 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Jetion JT440SEt(L) 440 W 22.50% -0.300 13.1 kg You are here
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Heavier, +2.0 pp, +10 yr warranty
STP-NT11/48QGSF-490 490 W 24.50% -0.260 21.5 kg Heavier, +2.0 pp, +10 yr warranty
JAT54S40-485/LR 485 W 24.30% -0.260 19.3 kg Heavier, +1.8 pp, +10 yr warranty
AIKO-A485-MCE54Mw 485 W 24.30% -0.260 21.0 kg Heavier, +1.8 pp, +10 yr warranty
AIKO-A485-MAH54Mw 485 W 24.30% -0.260 21.5 kg Heavier, +1.8 pp, +10 yr warranty
GK-5-54HG-485M 485 W 24.30% -0.260 21.0 kg Heavier, +1.8 pp, +10 yr warranty
ZEUS 3.0+ 108 485WP 485 W 24.30% -0.260 24.2 kg Heavier, +1.8 pp, +10 yr warranty
JT410SJt(B) 410 W 21.00% -0.290 25.8 kg Heavier, -1.5 pp, +10 yr warranty
JT415SJt(B) 415 W 21.30% -0.290 25.8 kg Heavier, -1.2 pp, +10 yr warranty
JT420SEt(L) 420 W 21.50% -0.300 13.1 kg -20 W, -1.0 pp
JT420SJt(B) 420 W 21.50% -0.290 25.8 kg Heavier, -1.0 pp, +10 yr warranty
JT425SJt(B) 425 W 21.80% -0.290 25.8 kg Heavier, -0.7 pp, +10 yr warranty
JT425SEt(L) 425 W 21.80% -0.300 13.1 kg -15 W, -0.7 pp
JT430SEt(L) 430 W 22.00% -0.300 13.1 kg -10 W, -0.5 pp
JT430SJt(B) 430 W 22.00% -0.290 25.8 kg Heavier, -0.5 pp, +10 yr warranty
JT435SEt(L) 435 W 22.30% -0.300 13.1 kg Very close match
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Heavier, +2.5 pp, +10 yr warranty

Found 1797 panels of the same or similar size to this one, within ±10 mm. See them here Found 1928 panels of the same or similar size to this one, within ±25 mm. See them here Found 3413 panels of the same or similar size to this one, within ±50 mm. See them here Found 4015 panels of the same or similar size to this one, within ±100 mm. See them here

About the JT SEt(L) 420-440W series

6 answered

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

Is the Jetion JT SEt(L) 420-440W series still available for purchase?
The JT SEt(L) 420-440W series has been discontinued by Jetion and is no longer offered as a current model in the manufacturer's lineup. Remaining warehouse stock may still be available through distributors, but availability should be confirmed before planning a larger project, as sourcing identical modules in the future may no longer be possible.
What warranty comes with Jetion JT SEt(L) 420-440W panels?
The manufacturer provides a 10-year product warranty covering material and workmanship defects, plus a 20-year power performance warranty guaranteeing the module maintains its rated energy output. While slightly shorter than the 25-30 years offered by market leaders, it still provides solid protection for the investment when purchasing these panels.
What is N-type TOPCon technology and how does it differ from PERC in Jetion panels?
TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that uses an additional passivation layer to reduce carrier recombination and boost conversion efficiency compared to older P-type PERC cells. In JT SEt(L) panels this translates into higher power output, lower degradation over time, and better performance under weak or diffuse light, such as on overcast days.
Are Jetion JT SEt(L) panels resistant to microcracks and hidden defects?
Yes, the manufacturer applies double 100% EL (electroluminescence) inspection during production, allowing detection of cell microcracks and other hidden defects before shipment. Combined with a production process optimized for PID resistance, this improves module reliability over the long-term operating life.
Are JT SEt(L) 420-440W panels suitable for roofs with limited load capacity?
Yes, the series features a lightweight construction compared to classic dual-glass modules, making it a good choice for roofs with limited load-bearing capacity, such as older outbuildings or industrial sheds. The reduced weight also simplifies transport and installation, lowering labor costs during setup.
Is Jetion a Tier 1 manufacturer and where is it based?
Yes, Jetion is classified as a Tier 1 manufacturer, indicating financial stability and a documented, multi-year track record of supplying modules to large commercial and bank-financed projects. The company is headquartered in China, where its main cell and module production facilities are located.
Add to compare