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Manufacturer review

JA Solar panels, read off the datasheets

JA Solar is a global leader in the manufacturing of high-performance photovoltaic products. Founded in 2005, the company designs, develops, manufactures, and sells solar cells and modules. JA Solar's products are used in ground-mounted power plants, commercial & industrial rooftop PV systems,...

Everything below is computed from those 504 datasheets: no score out of ten, no ranking of brands against each other, and nothing a manufacturer can pay to change. Where JA Solar does not publish a figure, it is left out of the average rather than assumed.

Panels
504
models in the database
Average efficiency
21.1%
across the catalogue
Best efficiency
24.8%
their strongest module
Power range
100-740 Wp
smallest to largest
Bifacial share
47%
238 dual-sided models
Average warranty
28 years
guaranteed output term
01

The top of the range

The leaders of JA Solar's own catalogue on the two figures a specification sheet leads with. Neither is a verdict: the most efficient module in a range is rarely the one that suits a given roof.

Most efficient module efficiency
1 JAM66D50-670/GB Monocrystalline bifacial 670 Wp 24.8% 2 JAM66D50-665/GB Monocrystalline bifacial 665 Wp 24.6% 3 JAT60S40-540/LR Monocrystalline 540 Wp 24.4% 4 JAM66D50-660/GB Monocrystalline bifacial 660 Wp 24.4% 5 JAT54S40-485/LR Monocrystalline 485 Wp 24.3%
Sort the whole catalogue by efficiency
Highest power nameplate output
1 JAM66D46-740/LB Monocrystalline bifacial 23.8% 740 Wp 2 JAM66D46-735/LB Monocrystalline bifacial 23.7% 735 Wp 3 JAM66D46-730/LB Monocrystalline bifacial 23.5% 730 Wp 4 JAM66D46-725/LB Monocrystalline bifacial 23.3% 725 Wp 5 JAM66D46-720/LB Monocrystalline bifacial 23.2% 720 Wp
Sort the whole catalogue by power
02

By what the array is for

Three cuts of the same catalogue, each ordered by efficiency inside its band. An empty column means the brand does not build for that case.

For a house roof 380-460 Wp
1 JAT54S40-460/LR Monocrystalline 460 Wp 23.5% 2 NS-460MH-108 Monocrystalline bifacial 460 Wp 23.0% 3 JAM54S40-460/LR Monocrystalline 460 Wp 23.0% 4 JAT54S41-460/LR Monocrystalline 460 Wp 23.0% 5 JAM54D40-460/LB Monocrystalline bifacial 460 Wp 23.0%
For a commercial array 500 Wp and up
1 JAM66D46-740/LB Monocrystalline bifacial 740 Wp 23.8% 2 JAM66D46-735/LB Monocrystalline bifacial 735 Wp 23.7% 3 JAM66D46-730/LB Monocrystalline bifacial 730 Wp 23.5% 4 JAM66D46-725/LB Monocrystalline bifacial 725 Wp 23.3% 5 JAM66D46-720/LB Monocrystalline bifacial 720 Wp 23.2%
For a ground mount dual-sided
1 JAM66D50-670/GB Monocrystalline bifacial 670 Wp 24.8% 2 JAM66D50-665/GB Monocrystalline bifacial 665 Wp 24.6% 3 JAM66D50-660/GB Monocrystalline bifacial 660 Wp 24.4% 4 JAM66D50-655/GB Monocrystalline bifacial 655 Wp 24.2% 5 JAM66D45-650/LB Monocrystalline bifacial 650 Wp 24.1%
03

What the catalogue is made of

Cell technology across the market

Shares are of the 504 modules in the database, counted once each. A power ladder of one module counts as its rungs, which is why a large catalogue is not the same as a wide one.

Cell technology share of the catalogue
PERC 49.0% 247 TOPCon 29.0% 146 N-type 17.9% 90 Unknown 3.2% 16 HJT 1.0% 5
PERC accounts for 49.0% of the catalogue - 247 of 504 modules.
Efficiency spread share of the catalogue
<20% 22.2% 112 20-21% 19.6% 99 21-22% 22.2% 112 22-23% 21.2% 107 23%+ 14.7% 74
04

Strengths and gaps

Both lists are derived from the figures above rather than written about the brand. A gap here is a gap in what is published, which is not always a gap in what is built.

What this catalogue is good at
  • Extensive portfolio of 504 panels across multiple series
  • Tier 1 bankable manufacturer - recognized by major financial institutions
  • High-efficiency panels available (up to 24.8%)
  • Strong warranty coverage averaging 28 years
  • High-power panels available (up to 740W) for commercial applications
  • Established manufacturer with 21+ years of experience
  • Large-scale production capacity of 100+ GW
05

In short

JA Solar: JA Solar is an industry leader in efficiency, offering 504 panels suitable for both residential and commercial buyers. With an average efficiency of 21.1% and top models reaching 24.8%, their panels deliver competitive performance. As a Tier 1 bankable manufacturer, they offer strong financial backing and long-term reliability.
Common questions
Is JA Solar a good solar panel manufacturer?
JA Solar offers 504 solar panel models with an average efficiency of 21.1%. They are a Tier 1 bankable manufacturer, recognized by major financial institutions for reliability. Check their full panel lineup on ComparePV to find the best model for your needs.
What types of solar panels does JA Solar make?
JA Solar manufactures panels ranging from 100W to 740W, covering both residential and commercial applications. Their portfolio includes PERC (49%), TOPCon (29%), N-type (18%) cell technologies.
How efficient are JA Solar solar panels?
JA Solar panels have an average efficiency of 21.1%, with their most efficient model reaching 24.8%. This puts them among the industry leaders in the current market.
Does JA Solar make bifacial solar panels?
Yes, JA Solar offers 238 bifacial panels, representing 47% of their portfolio. Bifacial panels can generate additional energy from the rear side, making them ideal for ground-mounted systems.
What warranty does JA Solar offer on their solar panels?
JA Solar panels come with an average performance warranty of 28 years. This warranty guarantees that the panels will maintain a specified level of power output over time, protecting your investment against degradation beyond normal levels.
Are JA Solar panels good for residential use?
JA Solar offers panels in the residential-friendly 380-460W range. For home installations, look for models with high efficiency and compact dimensions to maximize power from limited roof space. Browse their full lineup on ComparePV to filter by power range and specifications.
Does JA Solar use TOPCon technology?
Yes, JA Solar has adopted TOPCon (Tunnel Oxide Passivated Contact) cell technology in part of their portfolio. TOPCon cells offer higher efficiency and better temperature performance compared to older PERC technology, making them a strong choice for maximizing energy production.
06

Compared with

Build your own

A brand comparison weighs the two catalogues against each other - what each builds, at what efficiency, and how deep the range goes.

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