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Longi Solar LR5-54HTH-415M
Longi Solar Brand review

LR5-54HTH-415M

415 Wp Monocrystalline
ComparePV verdict

Middle of its segment, short guarantee

Rank 11,089 of 14,129
Compare panels Datasheet PDF
Power (Wp)
415
Typical for its class
Efficiency (%)
21.30
Typical · median 21.48%
Density (Wp/m²)
212.5
Typical · median 214.7
Temp (%/°C)
-0.290
Typical · median -0.300
Weight (kg)
20.8
Typical · median 23.0 kg
Warranty (yrs)
25
Weak · bottom 18%

The Longi Solar Hi-MO 6 Explorer series was designed to squeeze more energy out of every square meter of installation under real-world operating conditions - especially during hot summer months or when solar irradiance is weaker. The key advantage here is HPBC (back-contact) cell technology, which relocates electrical connections to the rear side of the cell. This results in not only higher performance but also a more uniform, modern appearance without visible busbars - delivering premium aesthetics highly valued on residential rooftops.

In practice, the Explorer addresses typical investor challenges: it enables greater energy yield from the same installation area and performs better under partial shading conditions. Additionally, full rear welding is employed, enhancing resistance to micro-cracks and improving durability during transportation and on the roof.

Ranking

6,941 panels in the 315-515 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 21.30% 21.48% Typical 8,585
Power density 212.5 214.7 Typical 8,858
Temperature coefficient -0.290 -0.300 Typical 2,220
Weight per kWp 50.1 53.1 Typical 3,642
Performance warranty 25 yrs 30 yrs Weak · bottom 18% 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 5 caution
Best for

Residential, commercial, hot-climate and cold-climate.

Not ideal for

Owners who want a long output guarantee.

Watch-outs
25 year performance warranty

Bottom 18% of the 315-515 W band, against a median of 30 yrs.

What owners get
HPBC back-contact technology

HPBC cells move electrical connections to the rear of the module, eliminating visible front-side busbars. The result is a uniform, all-black premium appearance plus reduced shading losses from busbars, translating into real gains under partial-shading conditions.

21.3% efficiency - top of segment

At 415 Wp, the 21.3% efficiency slightly edges out direct peers in the same power class: LEDVANCE M395~415P54LM-BF-F3 (21.25%), AE Solar AURORA AE MD-108 (21.28%), and Aptos Solar DNA 108 (21.25%).

Tier-1, bankable manufacturer

Longi Solar (founded 2000, headquartered in China) has for years been one of the world's largest module manufacturers, consistently rated Tier-1 by BNEF. This bankability simplifies project financing and insurance.

Full rear soldering

Full rear-side soldering increases resistance to microcracks arising during transport and installation, improving the module's long-term mechanical reliability.

Solid fit for residential and small C&I

The compact 415 Wp monofacial mono-crystalline format works well on typical pitched roofs, combining premium aesthetics with solid performance parameters without the price premium associated with bifacial technology.

Trade-offs
Production ended in 2023

The Hi-MO 6 Explorer series launched in 2022 and was already discontinued in 2023, superseded by the Hi-MO X6 Explorer line with higher HPBC cell efficiency (>25.5%). This short lifecycle means limited availability of service, spare parts, and identical matching modules for future array expansion.

No bifacial variant available

The panel is monofacial only, ruling out additional energy yield from rear-side light reflection available in competing bifacial designs when installed over light-reflective surfaces or ground-mounted racking.

Standard, not leading, warranty terms

15 years product and 25 years power warranty are typical for the segment rather than differentiating. Several newer N-type TOPCon panels on the market now offer 25-year product and 30-year linear power warranties.

Marginal efficiency edge over peers

The efficiency gap versus comparable models (21.3% vs 21.25-21.28%) is just 0.02-0.05 percentage points, which in practice delivers negligible energy advantage despite the premium HPBC positioning.

Notes from the database
  • Module efficiency of 21.3% is 0.5pp below average for database panels (median: 21.8%)
  • Power density of 212.5 W/m² is 5.6 W/m² below database median (218.1 W/m²) - needs more roof space
  • Temperature coefficient of -0.29%/°C matches the database median
  • 20.8 kg weight - 5.7 kg lighter than database median (26.5 kg), reducing installation effort
  • #8585 for efficiency, #2220 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 415 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.30 % Typical Segment median 21.48%
Vmpp · Impp 32.24 V · 12.88 A Operating point at max power
Voc · Isc 38.53 V · 13.92 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 20.8 kg Typical Typical · median 23.0 kg
Cells 108 Monocrystalline
Coefficient Pmax -0.290 %/°C Typical median -0.300 of its segment
Coefficient Voc · Isc -0.230 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 25 years Weak bottom 18% · median 30 yrs
End-of-warranty output 88.9 % Equals 361 W guaranteed
Degradation 1.50 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Longi Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 415 Wp appear here. The rest cover the whole series.

25-Year Power Warranty 25-Year Power Warranty Whole series

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
-0.290 %/°C against a segment median of -0.300
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Longi Solar LR5-54HTH-415M 415 W 21.30% -0.290 20.8 kg You are here
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +50 W, +2.5 pp, +5 yr warranty
LX-465M/182R-96+ GG 465 W 23.80% -0.260 23.5 kg +50 W, +2.5 pp, +5 yr warranty
AIKO-A460-MAH54Mb 460 W 23.60% -0.290 20.5 kg +45 W, +2.3 pp, +5 yr warranty
LX-465M/182R188-108+ GG 465 W 23.60% -0.290 24.5 kg +50 W, +2.3 pp, +5 yr warranty
JST-EDMH-(445-465)W-TD (460W class) 460 W 23.56% -0.300 20.5 kg +45 W, +2.3 pp, +5 yr warranty
LX-460M/182R-96+ GG 460 W 23.55% -0.260 23.5 kg +45 W, +2.2 pp, +5 yr warranty
PS-MNB108(HCBF)-460W 460 W 23.53% -0.290 20.5 kg +45 W, +2.2 pp, +5 yr warranty
JAT54S40-460/LR 460 W 23.50% -0.260 19.3 kg +45 W, +2.2 pp, +5 yr warranty
LR5-54HIB-390M 390 W 20.00% -0.340 21.5 kg -25 W, hotter, -1.3 pp
LR5-54HIB-395M 395 W 20.20% -0.340 21.5 kg -20 W, hotter, -1.1 pp
LR5-54HPB-400M 400 W 20.50% -0.340 20.8 kg -15 W, hotter, -0.8 pp
LR5-54HPH-405M 405 W 20.70% -0.340 20.8 kg -10 W, hotter, -0.6 pp
LR5-54HPH-410M 410 W 21.00% -0.340 20.8 kg Hotter, -0.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +95 W, +3.7 pp, +5 yr warranty
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +80 W, +3.5 pp, +5 yr warranty
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +90 W, +3.4 pp, +5 yr warranty

Found 1797 panels of the same or similar size to this one, within ±10 mm. See them here Found 1928 panels of the same or similar size to this one, within ±25 mm. See them here Found 3413 panels of the same or similar size to this one, within ±50 mm. See them here Found 4007 panels of the same or similar size to this one, within ±100 mm. See them here

About the Hi-MO 6 Explorer series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

What makes the HPBC cell technology in the Longi Solar Hi-MO 6 Explorer series stand out?
HPBC (Hybrid Passivated Back Contact) moves all electrical contacts to the rear of the cell, eliminating front-side busbars. This allows the front surface to absorb more light, improving conversion efficiency and boosting output under low irradiance and oblique light conditions. As a side effect, the module has a uniform, busbar-free appearance that is particularly valued in residential rooftop installations.
How does the Longi Hi-MO 6 Explorer handle high temperatures in summer?
The Hi-MO 6 Explorer performs better in heat than most standard modules. Its temperature coefficient of Pmax is only -0.29%/°C, compared to approximately -0.35%/°C for typical PERC cells. This means smaller power losses during hot summer afternoons when rooftop temperatures peak. The HPBC cell architecture is a key contributor to this lower thermal sensitivity, delivering a tangible real-world yield advantage.
What warranty does the Longi Solar Hi-MO 6 Explorer come with?
Longi Solar provides a 15-year product warranty covering manufacturing defects and a 25-year linear power output warranty. After 25 years of operation, the module is guaranteed to retain at least 88.9% of its nominal power. As a Tier 1 manufacturer, Longi Solar has the financial standing to back these warranties for the full operational lifetime of the system.
Are the Longi Hi-MO 6 Explorer panels bifacial? Can they be used on pergolas or elevated structures?
No, the Hi-MO 6 Explorer is a monofacial module - energy is generated from the front side only. It is not suitable for applications that rely on reflected albedo light, such as pergolas, carports over light-colored surfaces, or agri-PV installations. For standard pitched roof installations this is not a limitation, since rear-side irradiance is negligible in that context anyway.
Is the Longi Solar Hi-MO 6 Explorer series still available for purchase?
The Hi-MO 6 Explorer series has been discontinued. Longi Solar replaced it with the updated Hi-MO X6 Explorer line, which features a next-generation HPBC cell design. Some remaining stock may still be available through distributors, but complete deliveries for new projects cannot be guaranteed. If you are planning a new installation, ask your supplier about current availability within the X6 or newer product lines.
How much energy will a system built from Longi Hi-MO 6 Explorer 415 W panels produce annually?
Under typical Central European irradiance (roughly 1,000-1,100 kWh/m² per year), a single 415 W panel generates approximately 370-430 kWh annually, depending on location, roof tilt, and shading. A ten-panel system (approx. 4.15 kWp) typically covers 70-80% of an average household's electricity consumption. The HPBC technology's improved low-light and diffuse-light performance provides an additional yield advantage during autumn and winter months.
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