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JA Solar

JA Solar JAM54S31 405/MR

The JA Solar JAM54S31 405/MR is a high-performance solar panel designed to deliver exceptional power output for residential applications. Manufactured by JA Solar in China, this panel utilizes advanced monocrystalline PERC technology to achieve high efficiency and reliability.

JA Solar JAM54S31 405/MR

Specifications

Technical data

ManufacturerJA Solar
ModelJA Solar JAM54S31 405/MR
Wattage405 W
Efficiency21%
Cell TypeMonocrystalline PERC
Number of Cells108
Dimensions (W x H x D)1134 mm x 1722 mm x 30 mm
Weight21.5 kg
ColourBlack Frame
Made InChina
Durability84.8% in the 25th year
MEPV1
IBC Technology0
Fitted Dimensions (W x H)1134 mm x 1722 mm
Manufacturer Item CodeJAM54S31-405/MR

JA Solar JAM54S31 405/MR performance analysis

The JA Solar JAM54S31 405/MR panel offers an impressive efficiency of 21.0%, utilizing advanced monocrystalline PERC technology. With 108 half-cells and dimensions of 1134mm by 1722mm, it delivers a high power output of 405 W, making it ideal for residential installations seeking maximum energy production.

Weighing 21.5 kg and featuring a sleek black frame, this panel combines aesthetic appeal with excellent performance. It guarantees 84.8% output in the 25th year, ensuring long-term reliability and efficiency over its lifespan.

JA Solar JAM54S31 405/MR pros

  • High efficiency of 21.0%
  • High power output of 405W
  • Advanced monocrystalline PERC technology
  • 108 half-cells for increased efficiency
  • 84.8% output after 25 years ensures long-term reliability
  • Sleek all-black design suitable for residential applications

JA Solar JAM54S31 405/MR cons

  • Moderate size may require adequate roof space
  • Weight of 21.5 kg may require careful handling during installation
  • Not suitable for large-scale commercial applications
  • Higher upfront cost due to advanced technology

Conclusion

The JA Solar JAM54S31 405/MR solar panel is an excellent choice for residential projects requiring high power and efficiency. Its advanced technology, sleek design, and long-term performance make it a valuable investment for maximizing energy production in home installations.

Next step

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FAQ

Need Help? RoboMo's Got Answers

How much does commercial solar cost per kW?
DESNZ's 2025/26 data puts non-domestic 10–50 kW systems at a mean of £1,167.29 per kW of installed capacity, across 5,163 installs in Great Britain. DESNZ publishes no band above 50 kW, so larger systems are priced on quotes.
Do I need planning permission for solar on a commercial roof?
Often not in England. Class J of the GPDO allows roof solar on non-domestic buildings within height and edge limits, and the old 1 MW cap was removed in December 2023. Systems over 50 kW need prior approval from the council first. Listed buildings and scheduled monuments are excluded.
Can I put solar canopies over my car park?
In England, Class OA permits solar canopies over non-domestic off-street parking up to 4 m high, at least 10 m from homes, after prior approval of siting, design and glare.
Does my business system need a G99 application?
Almost certainly. G98 only covers up to 16 A per phase. Above that, the installer applies to your DNO under G99 before installation, sometimes through the fast track.
What if the grid cannot take all my export?
An export limitation scheme built to EREC G100 can cap export to what the DNO allows. The scheme must be fail-safe, and it is applied for alongside the G99 forms.
Can a business get paid for exported solar electricity?
Yes. The Smart Export Guarantee covers solar PV up to 5 MW in Great Britain. Suppliers set the rate, which must be above zero, so compare offers.
What is a solar PPA?
A power purchase agreement in which a third party owns and runs the system on your site and you buy its electricity at an agreed price. Kilowatts compares installation quotes and makes no recommendation on PPAs.
Does Kilowatts install commercial solar?
No. Kilowatts UK is a comparison service; independent partner installers survey, price and install, and you contract with the one you choose. Commercial quotes are available UK-wide.

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