JA Solar
JA Solar DeepBlue 4.0 Pro
B4.3 440W
Tier-1 N-type TOPCon panel offering a strong balance of efficiency, reliability and price.
440W
Power
22%
Efficiency
15yrs
Warranty
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Our verdict
A dependable mainstream choice that most installers can source easily, with efficiency close to premium panels at a lower price. The safe, widely-available pick.
Good
- Great value
- Widely stocked by UK installers
- Solid N-type performance
Watch out
- Not the absolute highest efficiency
- Shorter product warranty than some rivals
Specifications
| Power | 440 W |
|---|---|
| Efficiency | 22 % |
| Cell technology | N-type TOPCon |
| Type | Monocrystalline |
| Warranty | 15 yrs |