Solar panels

LONGi Solar Hi-MO 9

Name: LONGi Solar Hi-MO 9
Brand: LONGi Solar

635–660 W · 2 versions · best for small roofs: most watts per square metre

6.8GoodListed, not ranked · EnergyUpgrade Score out of 10

5.0 out of 5 from 4,369 owner reviews of LONGi Solar solar panels

Efficiency: 24.4%
Temp. coeff.: -0.26%/°C
Year 25: 90.6%

Get quotes for this Datasheet Manufacturer's copy

Why it scores 6.8.

Rated on LR7-72HYD-xxxM, 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
1.0 · 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
8.7 · 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 LR7-72HYD-xxxM, the version we rate. 8 approved models · Australian datasheet

Power: 645–660 W
Highest efficiency: 24.4%
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: 12 years
Performance warranty: 30 years
Cell technology: TaiRay
Size: 2382 × 1134 mm
Weight: 33.5 kg

Every version (2).

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

LR7-72HYD-xxxM
645–660 W · commercial · the version we rate
6.8
Efficiency: 24.4%Temp. coeff.: -0.26%/°CYear 25: 90.6% Datasheet
LR8-66HYD-xxxM
635–650 W · commercial
6.6
Efficiency: 24.1%Temp. coeff.: -0.26%/°CYear 25: 90.6% Datasheet

About the brand

LONGi Solar solar panels

Hi-MO X10 is one of the best residential panels on the approved list, with standout efficiency and heat performance. LONGi's older ranges are ordinary, so the rating depends on getting the right series.

Read the LONGi Solar review

7.5

Brand rating#4 of 8 brands for solar panels