68/ 100
Global Tier-1
JA Solar DeepBlue 4.0 Pro
JA Solar
Very good — Very Good
15+ Yrs Field-ProvenPVEL Top Performer
How it scores, by category
Architecture & Design68
Efficiency & Yield69
Durability (verified)63
Performance & Degradation74
Guarantee & Backbone74
Sustainability55
Efficiency
22.8%
Cell
TOPCon
Temp coeff
-0.29
Warranty
25 yr
The verdict
In our Global Tier-1 class, JA Solar JA Solar DeepBlue 4.0 Pro leads on guarantee & backbone.
Bankability: BNEF Tier 1 · AAA-bankable · sideline only, not scored. Source: https://www.jasolar.com/ · scoring methodology by Solar Analytica.