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JA Solar JAM66D46-695/LB
JA Solar Brand review

JAM66D46-695/LB

695 Wp TOPCon Bifacial 80%
ComparePV verdict

Solid all-round for its segment

Rank 1,358 of 14,005
Compare panels Datasheet PDF
Power (Wp)
695
Strong · top 8%
Efficiency (%)
22.40
Typical · median 22.40%
Density (Wp/m²)
223.7
Typical · median 223.7
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
38.2
Typical · median 34.6 kg
Warranty (yrs)
30
Typical · median 30 yrs

The JA Solar JAM66D46 LB series is designed for maximizing yield in installations where every square meter counts and ensuring stable performance year after year - especially on warehouse roofs, large industrial halls, and extensive PV farms. The application of N-type TOPCon cells translates to high resistance to light-induced degradation, facilitating predictable energy production over the long term. The bifacial double-glass construction allows for the use of reflected light while simultaneously enhancing the module's resistance to environmental factors critical for ground and industrial applications. The half-cut layout improves performance under partial shading and minimizes losses in practical installation conditions. It also helps that the better temperature coefficient supports efficiency during hot periods, and the refined performance under low-light conditions is another advantage. Compared to many standard PERC modules, JAM66D46 LB offers a more future-oriented technology and a more favorable long-term production profile.

Ranking

249 panels in the segment TOPCon 650-700 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.40% 22.40% Typical 4,774
Power density 223.7 223.7 Typical 4,877
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 55.0 53.2 Typical 9,360
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 · 1 caution
Best for

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

What owners get
Up to 23.8% efficiency – premium class

Peak module efficiency of 23.8% places the JAM66D46 LB on par with top competitors in its segment: Sharp GSD8K66H (23.82%), Tongwei TNC/THC Series (23.8%), and Just Solar JST-FCMH (23.82%). It ranks among the leading 700+ W modules from a Tier-1 manufacturer, reducing module count per installation and lowering overall BoS costs.

N-type TOPCon: temperature coefficient and zero LID

The temperature coefficient of Pmax is –0.29%/°C versus –0.34 to –0.36%/°C typical for PERC modules, delivering a measurable yield advantage during hot weather. N-type cells eliminate light-induced degradation (LID), stabilizing the degradation curve from year one onward and simplifying P50/P90 modeling for financed projects.

Bifacial double-glass – albedo-driven energy gain

An 80% (±10%) bifaciality factor enables energy harvest from ground-reflected irradiance, boosting estimated annual yield by 4–12% depending on surface albedo and tilt angle. The dual-glass construction removes the backsheet entirely, improving PID immunity and moisture resistance — critical for long-life ground-mount farms and industrial rooftops.

30-year linear power warranty – 87.4% after 30 years

JA Solar guarantees degradation of ≤1% in year one and ≤0.40%/year for the subsequent 29 years, maintaining at least 87.4% of rated power at year 30. This is among the most stringent commitments in the 700+ W segment — notably stronger than the typical 25-year warranties with an 84.8% end-of-life threshold offered by several competitors.

BNEF Tier-1 bankability and market leader

JA Solar holds BNEF Tier-1 status (under the March 2026 methodology) and ranked #1 in the Wood Mackenzie Global Solar Module Manufacturer Ranking for H1 2025, scoring 91.7/100. Strong bankability simplifies non-recourse project financing and meets lender requirements common in utility-scale PV and renewable energy project finance.

Trade-offs
Fire class C (UL Type 29)

The datasheet lists fire performance as UL Type 29 / Class C, the lowest tier in the UL fire classification scale. For ground-mount or industrial rooftop projects where local building codes or insurer requirements mandate Class A fire resistance, modules with a higher fire rating may need to be specified instead. This is not a concern for the majority of standard utility-scale ground-mount installations.

Notes from the database
  • Efficiency of 22.4% matches the TOPCon 650-700W median
  • At 223.7 W/m² power density, roof space requirements are typical for TOPCon 650-700W panels
  • At -0.29%/°C, hot weather performance is typical for TOPCon 650-700W panels
  • At 38.2 kg (3.6 kg above TOPCon 650-700W median of 34.6 kg), requires checking roof load capacity
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface

Specifications

Open datasheet PDF
Nominal power (Pmax) 695 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.40 % Typical Segment median 22.40%
Vmpp · Impp 40.22 V · 17.26 A Operating point at max power
Voc · Isc 48.00 V · 18.39 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×33 mm · 3.11 m² of roof
Weight 38.2 kg Typical Typical · median 34.6 kg
Cells 132 · 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 -0.250 · 0.045 %/°C
NOCT 45 °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 607 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by JA Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 695 Wp appear here. The rest cover the whole series.

n-type Bifacial Double Glass Module Linear Performance Warranty n-type Bifacial Double Glass Module Linear Performance Warranty 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
-
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
JA Solar JAM66D46-695/LB 695 W 22.40% -0.290 38.2 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg -45 W, lighter, +2.8 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Cooler, lighter, +2.8 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg Cooler, lighter, +2.6 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg -50 W, lighter, +2.6 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg Cooler, lighter, +2.6 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg Cooler, lighter, +2.5 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +2.4 pp
JAM66D46-700/LB 700 W 22.50% -0.290 38.2 kg Very close match
JAM66D46-705/LB 705 W 22.70% -0.290 38.2 kg +10 W, +0.3 pp
JAM66D46-710/LB 710 W 22.90% -0.290 38.2 kg +15 W, +0.5 pp
JAM66D46-715/LB 715 W 23.00% -0.290 38.2 kg +20 W, +0.6 pp
JAM66D46-720/LB 720 W 23.20% -0.290 38.2 kg +25 W, +0.8 pp
JAM66D46-725/LB 725 W 23.30% -0.290 38.2 kg +30 W, +0.9 pp
JAM66D46-730/LB 730 W 23.50% -0.290 38.2 kg +35 W, +1.1 pp
JAM66D46-735/LB 735 W 23.70% -0.290 38.2 kg +40 W, +1.3 pp
JAM66D46-740/LB 740 W 23.80% -0.290 38.2 kg +45 W, +1.4 pp
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +110 W, cooler, +2.7 pp

Found 1390 panels of the same or similar size to this one, within ±10 mm. See them here Found 1400 panels of the same or similar size to this one, within ±25 mm. See them here Found 1400 panels of the same or similar size to this one, within ±50 mm. See them here Found 1432 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is the temperature coefficient of the JA Solar JAM66D46 LB and what does it mean in practice?
The temperature coefficient (Pmax) is -0.29%/°C, meaning the panel loses less power per degree above 25°C than typical PERC modules (-0.35%/°C). When panel temperature reaches 65°C on a hot summer day, power loss is around 11.6% instead of ~14%. For large commercial or utility-scale systems, this difference translates into a measurable boost in annual energy yield.
What does the bifacial double-glass design of the JAM66D46 LB offer, and is it worth the premium?
Bifacial double-glass means a rear glass sheet instead of a polymer backsheet and the ability to generate power from both sides of the module. With adequate ground albedo — light-colored roofing membrane, gravel, or concrete — the rear side can contribute additional yield up to 80% of front-side output. Double-glass also provides superior protection against moisture and UV degradation, extending real-world service life compared to backsheet modules.
What warranty does JA Solar provide on the JAM66D46 LB panels?
JA Solar offers a 12-year product warranty covering manufacturing defects and workmanship, plus a 30-year linear power warranty. Maximum degradation is capped at 1% in year one and 0.40% per year thereafter, guaranteeing at least 87.4% of rated power output after 30 years of operation.
Are JA Solar JAM66D46 LB panels suitable for installation on industrial or warehouse rooftops?
Yes, the JAM66D46 LB series is purpose-built for commercial and utility-scale applications. With up to 740 W per module, fewer panels are required to reach target capacity, reducing BoS costs. The mechanical load rating of 5,400 Pa on the front side makes these modules suitable for high snow-load zones typical of large industrial roof structures.
How do JA Solar JAM66D46 LB panels compare to standard PERC modules?
N-type TOPCon technology delivers lower LID (light-induced degradation), a better temperature coefficient (-0.29%/°C vs. ~-0.35%/°C for PERC), and higher module efficiency reaching 23.8%. Compared to PERC, the JAM66D46 LB provides more stable long-term energy production, better low-irradiance performance, and a more favorable LCOE over the system lifetime.
How many cells does the JAM66D46 LB have, and does the half-cut layout matter for commercial installations?
The module contains 132 half-cut cells in a 6×22 configuration. The half-cut design reduces series resistance and ensures that partial shading — from HVAC units or skylights on a warehouse roof — affects only a portion of the module rather than the entire string. In real-world commercial mounting conditions, this results in significantly lower mismatch losses compared to full-cell modules.
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