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Longi Solar Brand review

RL530HM

530 Wp PERC
ComparePV verdict

Light for its output, weak in heat

Rank 9,739 of 14,005
Compare panels Datasheet PDF
Power (Wp)
530
Typical for its class
Efficiency (%)
20.70
Typical · median 20.90%
Density (Wp/m²)
205.1
Weak · bottom 11%
Temp (%/°C)
-0.470
Weak · bottom 1%
Weight (kg)
27.0
Strong · 1.4 kg below median
Warranty (yrs)
25
Weak · bottom 23%

The Longi Solar Monocrystalline 144 series consists of 144-cell modules designed to minimize energy losses and operate more stably under partial shading. The use of half-cut technology in combination with PERC monocrystalline cells improves the module's performance in real-world conditions - when shadows from chimneys, trees, or dirt only cover a portion of the surface. Another noteworthy feature is the intelligent soldering, which supports even current flow and increases resistance to micro-cracks during transport and installation.

In practice, this series addresses common issues with rooftop and commercial installations - fluctuations in power output in low light, power drops due to uneven sun exposure, and compatibility requirements with modern inverters. These modules also feature gallium-doped technology, which limits LID degradation, resulting in more predictable performance over a longer period. This makes them a good choice for prosumers, businesses, and farms that want higher yields in challenging conditions and guaranteed performance for years to come.

Ranking

706 panels in the segment PERC 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.70% 20.90% Typical 10,764
Power density 205.1 209.0 Weak · bottom 11% 11,321
Temperature coefficient -0.470 -0.350 Weak · bottom 1% 13,879
Weight per kWp 50.9 53.0 Strong · top 25% 4,311
Performance warranty 25 yrs 30 yrs Weak · bottom 23% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 5 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

Hot climates, roofs where every square metre has to count and owners who want a long output guarantee.

Strengths
50.9 kg per kWp

Top 25% of the PERC 500-550 W segment, against a median of 53.0.

Watch-outs
-0.470 %/°C temperature coefficient

Bottom 1% of the PERC 500-550 W segment, against a median of -0.350. Ranked 13,879th in the whole database.

205.1 watts per square metre

Bottom 11% of the PERC 500-550 W segment, against a median of 209.0.

25 year performance warranty

Bottom 23% of the PERC 500-550 W segment, against a median of 30 yrs.

What owners get
High efficiency up to 21.5%

The 20.7-21.5% efficiency range places this series above comparable 144 half-cut modules in the 530-550 Wp class, such as IBC Solar 182M (21.28%), Goldi Solar GS10-B144-TF (21.3%), and Jetion JT SGh (21.3%).

Gallium doping reduces LID

Longi's gallium-doped silicon technology, developed with Shin-Etsu, cuts light-induced degradation from a typical ~0.6%/year for PERC down to around 0.45%/year, resulting in roughly 11-12% total power loss over 25 years versus higher rates typical of older P-type modules.

144 half-cut cells improve shading tolerance

The half-cut architecture with 144 half-cells lowers resistive losses and improves module behavior under partial shading (e.g., from a chimney or tree), which matters for rooftop installations with uneven sun exposure.

Tier-1 manufacturer, project bankability

LONGi Solar has consistently held BloombergNEF Tier 1 status (confirmed in Q1 and Q2 2026), which supports non-recourse bank financing for commercial and utility-scale PV projects. The company has been operating since 2000.

Smart soldering limits microcracks

The applied soldering process supports even current flow between cells and increases module resistance to microcracks arising during transport and installation, meaningfully lowering the risk of premature power degradation.

Trade-offs
Discontinued since 2023

Launched in 2019, this series was phased out of production in 2023 - availability of new units, service support, and spare parts is limited, as LONGi has shifted focus to newer product lines (including the Hi-MO series with HPBC technology).

PERC technology superseded by newer options

PERC was the standard when this series launched, but current market leaders - including LONGi itself with HPBC cells reaching 28.13% efficiency - now offer higher efficiency and often longer power warranties than the standard 25 years featured in this series, worth weighing against current tier-1 offerings.

Notes from the database
  • At 20.7% efficiency, this panel is on par with typical PERC 500-550W modules
  • 205.1 W/m² power density is 3.9 W/m² below PERC 500-550W median (209.0 W/m²) - requires larger installation area
  • -0.47%/°C temperature coefficient - 0.12pp worse than PERC 500-550W median (-0.35%/°C), expect higher hot weather losses
  • Weight of 27.0 kg (1.4 kg below PERC 500-550W median of 28.4 kg) allows easier transport and roof mounting
  • #10764 for efficiency, #13879 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 530 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.70 % Typical Segment median 20.90%
Vmpp · Impp 41.35 V · 12.82 A Operating point at max power
Voc · Isc 49.20 V · 13.71 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2279×1134×35 mm · 2.58 m² of roof
Weight 27.0 kg Strong Strong · 1.4 kg below median
Cells 144 · PERC Monocrystalline
Coefficient Pmax -0.470 %/°C Weak bottom 1% of its segment
Coefficient Voc · Isc -0.346 · 0.036 %/°C
NOCT 47 °C At 800 W/m², 20 °C ambient
Product warranty 10 years Hardware defects only
Performance warranty 25 years Weak bottom 23% · median 30 yrs

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.470 %/°C against a segment median of -0.350
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Longi Solar RL530HM 530 W 20.70% -0.470 27.0 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, +4.3 pp, +5 yr warranty
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +4.1 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, +4.1 pp, +5 yr warranty
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, +4.0 pp, +5 yr warranty
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, +3.9 pp, +5 yr warranty
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +3.8 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, +3.8 pp, +5 yr warranty
RL535HM 535 W 20.90% -0.470 27.0 kg Very close match
LR5-72HBD-540M 540 W 20.90% -0.340 31.8 kg Cooler, heavier, +5 yr warranty
RL540HM 540 W 21.10% -0.470 27.0 kg +10 W, +0.4 pp
LR5-72HPH-545M 545 W 21.10% -0.340 27.5 kg +15 W, cooler, +0.4 pp
RL545HM 545 W 21.30% -0.470 27.0 kg +15 W, +0.6 pp
LR5-72HBD-550M 550 W 21.30% -0.340 31.8 kg Cooler, heavier, +5 yr warranty
RL550HM 550 W 21.50% -0.470 27.0 kg +20 W, +0.8 pp
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +120 W, cooler, +4.5 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +115 W, cooler, +4.3 pp

Found 2326 panels of the same or similar size to this one, within ±10 mm. See them here Found 2368 panels of the same or similar size to this one, within ±25 mm. See them here Found 2382 panels of the same or similar size to this one, within ±50 mm. See them here Found 2542 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the Longi Solar Monocrystalline 144 series still available for purchase?
The Longi Solar Monocrystalline 144 series has been discontinued and is no longer actively manufactured by LONGi Solar. Limited stock may still be available from select distributors, but new supply should not be expected. If you require full availability and ongoing service support, consider LONGi's current lineup, such as the Hi-MO 6 or Hi-MO X10 series.
What warranty comes with Longi Solar Monocrystalline 144 panels?
Longi Solar Monocrystalline 144 modules include a 10-year product warranty covering material and workmanship defects, plus a 25-year linear power output warranty guaranteeing that a specified percentage of rated power is maintained over a quarter century. These are standard Tier 1 manufacturer warranty terms and provide solid long-term assurance for both residential prosumers and commercial PV farms.
Does the 144 half-cut cell layout actually help with partial roof shading?
Yes. In the 144 half-cut cell configuration, each cell is split in half, reducing internal resistance and limiting losses caused by shading from chimneys, antennas, or tree branches. The electrical segmentation of the module into independent sections means that a shaded area suppresses output from the rest of the panel to a significantly lesser degree. This is a particularly valuable feature on pitched roofs with dormers or other shading obstacles.
What is gallium doping and does it actually reduce module degradation?
Light-induced degradation (LID) is a phenomenon in which standard boron-based monocrystalline modules lose a few percent of rated power during the first weeks of operation. The Longi Solar Monocrystalline 144 series uses gallium-doped PERC cells, which significantly limits this effect. The result is more stable and predictable energy production throughout the system's entire service life, translating into better real-world yield over a long-term horizon.
What is the maximum power of Longi Solar Monocrystalline 144 panels and how does it affect system sizing?
The maximum power output of modules in this series reaches 550 Wp. At typical irradiation levels in Central Europe of approximately 1,000–1,100 kWh/kWp per year, a single panel can generate around 550–605 kWh annually. The high unit power rating allows a larger total system capacity to be installed on the same roof area, which is critical when mounting space is limited.
Are the 550 Wp Longi Solar Monocrystalline 144 panels compatible with popular inverters?
The 550 Wp modules in the Monocrystalline 144 series have electrical parameters compatible with most inverters featuring MPPT inputs rated for 1000 V or 1500 V system voltage. Before selecting an inverter, verify the specific module datasheet and confirm that the inverter's input voltage and current range match the panel's parameters. LONGi monocrystalline modules are widely used with inverters from Fronius, SMA, Huawei, and SolarEdge.
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