JA Solar 615W Glass-Glass Bifacial Panel — JAM72D40-615/GB
The glass-glass variant of JA Solar’s 615W bifacial module is engineered for longevity and performance in tough climates. Where standard panels use a polymer backsheet, the glass-glass design uses tempered glass on both faces — delivering superior moisture resistance, PID immunity, and mechanical strength.
Key Specifications
- Peak Power (Pmax): 615W (STC front-side)
- Effective Output (with bifacial gain): Up to 683W
- Cell Type: Bifacial PERC n-type
- Efficiency: Up to 21.3%
- Bifacial Gain: Up to 11%
- Temperature Coefficient (Pmax): -0.35%/°C
- Front Glass: 2.0mm tempered high-transmittance
- Rear Glass: 2.0mm tempered
- Connector: MC4 compatible
- Certifications: IEC 61215, IEC 61730
Built for 30+ Years of African Sun
Glass-glass construction resists UV degradation, salt mist, and humidity far better than polymer-backsheet alternatives. The improved durability makes this the preferred choice for coastal SA installations or any system where replacement cost is high relative to the premium of the glass-glass build.
Warranty: 12 years product warranty, 30-year power output warranty (87.4% at 30 years)
Complete Your Solar Setup
The JA Solar 615W glass glass bifacial panel delivers excellent power output for residential and commercial installations. Combine your JA Solar 615W glass glass bifacial panel with a hybrid inverter and battery storage for a complete system. Browse our complete solar kits for a ready-to-install solution.





Riaan Botha –
Installed twelve of these JA Solar 615W panels on my north-facing roof in Pretoria and they are producing more than the spec sheet promised. Generation starts early in the morning and keeps going late into the afternoon. Price per watt was the best I found online and delivery was well packed with zero damage to any panel.
Nomsa Khumalo –
These panels have been running for six months through the Joburg summer without missing a beat. The bifacial design picks up reflected light from my light-coloured roof tiles which gives a meaningful extra boost in output. PowerVault had stock ready to ship when other suppliers were on a three-week backorder.
Petrus Nel –
Sourced eighteen JA Solar 615W panels from PowerVault for a commercial installation in George. Lead time was short and every panel arrived damage-free despite the distance. Performance data after three months is tracking about five percent above the datasheet spec on our south-facing installation with a slight east tilt. Very satisfied with the quality and the pricing.
Gerhard Swanepoel –
Ordered twenty JA Solar 615W panels for our lodge outside Nelspruit. All twenty arrived without a single crack or chip. The bifacial performance in the Lowveld climate where we have a lot of reflected light from the white gravel pathways is impressive. PowerVault kept us updated on the delivery status throughout. Very smooth transaction.