Mid-Range★★★★4.2/5

JA Solar Solar Panels

4 panel models | Up to 22.4% efficiency | China

22.4%

Top Efficiency

580W

Max Wattage

30yr

Performance Warranty

2005

Founded

About JA Solar

JA Solar is one of the world's largest solar cell and module manufacturers, consistently ranking among the top five globally by shipment volume. Known for their DeepBlue series, JA Solar combines scale-driven affordability with solid engineering to serve residential, commercial, and utility markets worldwide.

Pros

Top-five global manufacturer with excellent bankability
DeepBlue series offers strong performance at competitive prices
Extensive global track record with large installed base
Good balance of price and quality for mid-range segment

Cons

Brand awareness lower than SunPower or Q Cells in US residential market
Product warranty shorter than premium competitors on some models
Customer support in the US could be more accessible

JA Solar Solar Panel Models

Model	Wattage	Efficiency	Cell Type	Price/Watt	Warranty
DeepBlue 4.0 Pro JAM54D40	445W	22.4%	TOPCon	$0.55-$0.85	15/30yr
DeepBlue 3.0 Pro JAM72S30	540W	21.3%	Monocrystalline	$0.42-$0.70	12/25yr
DeepBlue 4.0 Pro JAM72D40	580W	22.3%	TOPCon	$0.48-$0.75	15/30yr
DeepBlue 4.0 Mini JAM54D41-LB	435W	22.2%	TOPCon	$0.52-$0.82	15/30yr

Detailed Specifications

DeepBlue 4.0 Pro JAM54D40

Wattage

445W

Efficiency

22.4%

Cell Technology

TOPCon

Dimensions

75.6 x 41.5 x 1.2 in

Weight

46.3 lbs

Temperature Coefficient

-0.29%/°C

Degradation Rate

0.35%/year

Product Warranty

15 years

Performance Warranty

30 years

DeepBlue 3.0 Pro JAM72S30

Wattage

540W

Efficiency

21.3%

Cell Technology

Monocrystalline

Dimensions

89.4 x 44.6 x 1.4 in

Weight

62 lbs

Temperature Coefficient

-0.35%/°C

Degradation Rate

0.4%/year

Product Warranty

12 years

Performance Warranty

25 years

DeepBlue 4.0 Pro JAM72D40

Wattage

580W

Efficiency

22.3%

Cell Technology

TOPCon

Dimensions

92.4 x 45.5 x 1.4 in

Weight

70.1 lbs

Temperature Coefficient

-0.29%/°C

Degradation Rate

0.35%/year

Product Warranty

15 years

Performance Warranty

30 years

DeepBlue 4.0 Mini JAM54D41-LB

Wattage

435W

Efficiency

22.2%

Cell Technology

TOPCon

Dimensions

74.8 x 41.5 x 1.2 in

Weight

44.1 lbs

Temperature Coefficient

-0.29%/°C

Degradation Rate

0.35%/year

Product Warranty

15 years

Performance Warranty

30 years

JA Solar Solar Panels FAQ

JA Solar is a mid-range-tier solar panel manufacturer headquartered in China, rated 4.2/5 by industry experts. Their panels offer up to 22.4% efficiency with 30-year performance warranties. Top-five global manufacturer with excellent bankability.

JA Solar solar panels range from $0.52 to $0.85 per watt. For a typical 6kW system, that's approximately $3,300 to $5,100 before the 30% federal tax credit.

The most efficient JA Solar panel is the DeepBlue 4.0 Pro JAM54D40 at 22.4% efficiency and 580W. Higher efficiency panels are ideal for homes with limited roof space.

JA Solar offers 15-year product warranties and 30-year performance warranties on their solar panels. The performance warranty guarantees at least 89.5% output after 30 years.