Solar panels

JA Solar DeepBlue 5.0

Name: JA Solar DeepBlue 5.0
Brand: JA Solar

470–545 W · 4 versions · best for hot roofs: low heat loss

8.1Very good#5 of 22 panel series we rank · EnergyUpgrade Score out of 10

4.8 out of 5 from 895 owner reviews of JA Solar solar panels

Efficiency: 23.8%
Temp. coeff.: -0.26%/°C
Year 25: 90.6%

Get quotes for this Datasheet Manufacturer's copy

Why it scores 8.1.

Rated on JAM48D51-xxx/LR, its best home version. Each part comes from the datasheet with a published rule; anything not stated scores zero.

How we rate solar panels

Output guaranteed at year 25
8.2 · 25%
What the panel promises to still produce after 25 Australian summers. It compounds every year.
Rule: Worked out from the datasheet's first-year and annual degradation: 84% scores 0, 92% scores 10.
Product warranty
7.5 · 25%
Covers defects in the panel itself. Twelve years is the floor; the best give 25 or more.
Rule: Years of product warranty: 10 scores 0, 30 scores 10.
Heat performance
8.6 · 20%
Panels lose output as they heat up, and roof panels often pass 65°C in summer.
Rule: Temperature coefficient of Pmax: -0.38%/°C scores 0, -0.24%/°C scores 10.
Efficiency
7.3 · 20%
More watts from each square metre, which matters most on small or broken-up roofs.
Rule: Highest module efficiency in the range: 20.5% scores 0, 25% scores 10.
Performance warranty length
10.0 · 10%
How long the output guarantee runs.
Rule: Years: 25 scores 0, 30 scores 10.

Full specifications.

For JAM48D51-xxx/LR, the version we rate. 15 approved models · Global datasheet

Power: 470–475 W
Highest efficiency: 23.8%
Temperature coefficient (Pmax): -0.26%/°C
First-year degradation: 1%
Annual degradation after year 1: 0.35%
Output at year 25 (our calculation): 90.6%
Product warranty: 25 years
Performance warranty: 30 years
Cell technology: Bycium+ 5.0
Size: 1762 × 1134 mm
Weight: 21.5 kg
All-black look: Yes

Every version (4).

Same series in different sizes, finishes or generations. Check which version is on your quote.

JAM48D51-xxx/LR
470–475 W · the version we rate
8.1
Efficiency: 23.8%Temp. coeff.: -0.26%/°CYear 25: 90.6% Datasheet
JAM48D50-xxx/LR
475–490 W
7.2
Efficiency: 24.5%Temp. coeff.: -0.26%/°CYear 25: 90.6% Datasheet
JAM54D50-xxx/GR
530–545 W
7.2
Efficiency: 24.5%Temp. coeff.: -0.26%/°CYear 25: 90.6% Datasheet
JAM66D50-xxx/GB
645–665 W · commercial
6.8
Efficiency: 24.6%Temp. coeff.: -0.26%/°CYear 25: 90.6% Datasheet

About the brand

JA Solar solar panels

Consistently good panels with one of the strongest independent test records, at a mainstream price. Not the most efficient, but a safe, sensible pick.

Read the JA Solar review

7.4

Brand rating#5 of 8 brands for solar panels