Founded in 2005, Shanghai-based JA Solar’s growth has been explosive in the past two decades. As of 2024, JA Solar was the second largest solar manufacturer in the world by volume, shipping 38GW worth of modules in the first half of the year alone.

JA Solar is one of the leading suppliers of solar modules for large scale energy products around the world, and is continuing to expand into rooftop and smaller commercial solar markets with high-efficiency solar panels.

Research and development have played a critical role in securing this growth, with the company continuing to invest in new solar cell technologies, along with improvements in solar module design.

Today, JA Solar products are used in 130 countries and regions around the globe, with a cumulative total of more than 280GW of solar cells and products shipped worldwide by the end of Q1 2025.

For the residential market, the Deep Blue 4.0 range has taken over as JA Solar’s flagship range from the  Deep Blue 3.0 modules.

Incorporating N-type TOPCon solar cells along with bifacial technology, Deep Blue 4.0 solar panels deliver high efficiency at affordable prices. This is a significant improvement over the older p-type monofacial panels of the 3.0 range.

Solar modules come in a wide range of power outputs and sizes designed for residential and commercial projects, up to large-scale solar farms, agri-voltaics, and floating solar power plants.

In 2025, the company debuted the first of the Deep Blue 5.0 series, with the first module unveiled with a Power rating of 670W and a module efficiency of 24.8%.

JA Solar enhances the power output of all its solar panels with a module design incorporating front and back glass sheeting along with Bifacial Solar Cells.

This not only ensures that panels have greater protection against environmental damage and microcracking, but also allows them to generate additional power from reflected sunlight.

The 2mm thick glass coverings provide protection against overheating within the solar cells, and deliver greater power output in low light conditions.

Solar Panel Range

Deep Blue 4.0

Output:

415W – 630W

Efficiency:

21.8% – 23.4%

Product Warranty:

12 Years

Power Guarantee:

30 Years

Deep Blue 3.0

Output:

380W – 610W

Efficiency:

20.5% – 22.1%

Product Warranty:

12 Years

Power Guarantee:

25 Years

⭐⭐⭐⭐⭐

Get Free Solar Quotes Today

Find a local recommended solar panel installer in your area, and get your free quote today. It’s 100% cost and commitment free.

Vetted solar companies:

  • SEAI Authorised
  • SafeElectric Certified
  • Fully Insured
  • 1,000+ Installations
  • Tier-1 Materials
  • Dedicated Customer Care
  • Fully Vetted
  • Competitively Priced
  • Free Site Assessments

Vetted solar companies:

  • SEAI Authorised
  • SafeElectric Certified
  • Fully Insured
  • 1,000+ Installations
  • Tier-1 Materials
  • Dedicated Customer Care
  • Fully Vetted
  • Competitively Priced
  • Free Site Assessments