--- title: "Longi Solar LR5-72HTDR-590M Solar Panel: Specs & Datasheet | ComparePV" description: "Longi Solar LR5-72HTDR-590M solar panel. Specs: 22.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr5-72htdr-590m" image: "https://comparepv.com/og/panel/longi-lr5-72htdr-590m.png" updated: 2026-09-11 --- # Longi Solar LR5-72HTDR-590M Middle of its segment, heavy for its output 237 panels in the segment Back Contact 490-690 W ## Identity - **Manufacturer:** Longi Solar - **Model:** LR5-72HTDR-590M - **Series:** Hi-MO X6 Guardian - **Rated power:** 590 W - **Cell technology:** Back Contact - **Bifacial:** yes ## How it compares Compared against segment Back Contact 490-690 W (237 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 590 W | 635 W | Typical | | | Module efficiency | 22.80% | 24.10% | Weak - bottom 10% | 2,769 | | Power density | 228.4 | 240.6 | Weak - bottom 11% | 2,653 | | Temperature coefficient | -0.280 | -0.260 | Weak - bottom 12% | 1,347 | | Weight (kg) | 31.8 kg | 31.5 kg | Weak - bottom 3% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.80% | 24.10% | Weak - bottom 10% | 2,769 | | Power density | 228.4 | 240.6 | Weak - bottom 11% | 2,653 | | Temperature coefficient | -0.280 | -0.260 | Weak - bottom 12% | 1,347 | | Weight per kWp | 53.9 | 49.5 | Weak - bottom 3% | 8,099 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **53.9 kg per kWp** - Bottom 3% of the Back Contact 490-690 W segment, against a median of 49.5. Ranked 8,099th in the whole database. - **22.80% module efficiency** - Bottom 10% of the Back Contact 490-690 W segment, against a median of 24.10%. - **228.4 watts per square metre** - Bottom 11% of the Back Contact 490-690 W segment, against a median of 240.6. - **Best for:** Residential and commercial. - **Not ideal for:** Weight-limited structures, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 590 W - **Efficiency:** 22.80 % - **Voltage at Pmax (Vmp):** 44.15 V - **Current at Pmax (Imp):** 13.37 A - **Open-circuit voltage (Voc):** 52.60 V - **Short-circuit current (Isc):** 14.26 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.280 %/degC - **Temperature coefficient of Voc:** -0.230 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** Back Contact - **Cell count:** 144 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 31.8 kg - **Area:** 2.58 m2 - **Power density:** 228.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.8 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.35 % - **Output after 30 years:** 524 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2769 of 14129 | | Power density | 2653 of 14129 | | Temperature coefficient | 1347 of 14129 | | Weight | 8099 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Front-side busbar-free HPBC cells** - Hybrid Passivated Back Contact technology eliminates visible front-side busbars, improving light absorption and enabling up to 22.8% module efficiency - matching the best comparable N-type TOPCon series (Talesun TM7G72M and Horay HS 182-144, both at 22.8%). - **Anti-Dust frame eliminates edge soiling** - The glass-flush frame design prevents dirt and water accumulation at module edges, reducing hot-spot risk and power loss - a key advantage on low-tilt roofs where rainfall doesn't naturally wash away contaminants. - **30-year linear power warranty** - The manufacturer offers a 30-year power output warranty alongside a 15-year product warranty, matching the best offers in the segment and lowering long-term investment risk. - **Corrosion-resistant environmental design** - The bifacial dual-glass construction with salt mist and ammonia resistance makes the series suitable for coastal and agricultural installations, where standard modules degrade faster. - **Tier-1 manufacturer with long track record** - Longi Solar, founded in 2000, is recognized as a bankable Tier-1 manufacturer, easing project financing and reducing warranty-servicing risk compared to lesser-known brands in the peer comparables list. ## Cons - **Back contact price premium** - Back contact cells (including HPBC) typically carry an 8-20% cost premium at the cell level over standard N-type TOPCon cells used by comparable series such as Talesun and Horay Solar. Longi positions HPBC pricing closer to mainstream TOPCon, but investors should verify the actual price gap with distributors. - **Anti-Dust value limited to low-tilt roofs** - The main design advantage (elimination of edge soiling) is most relevant for flat or low-tilt roofs. For typical steep pitched roofs, where rain naturally washes away contaminants, the premium for this feature may not fully translate into additional energy yield. ## About this series The Longi Solar Hi-MO X6 Guardian series redefines performance standards through the use of innovative **HPBC cell technology**, which significantly improves light absorption and module efficiency. A key feature of this line is the unique **Anti-Dust design**, where the frame is flush with the glass surface. This solution completely eliminates the common problem of dirt, dust, and water accumulation at the edges, which in traditional panels leads to systematic power drops and the risk of harmful hot-spots. As a result, users gain a **higher long-term energy yield** without the need for frequent and costly cleaning of the installation. This product is specifically dedicated to roofs with a low tilt angle, where the natural rinsing of contaminants by rain is limited. Compared to the competition, the Hi-MO X6 Guardian stands out with its intelligent approach to real-world operating conditions, solving the problem of so-called edge deposits, which can drastically reduce the efficiency of the entire PV system. By choosing these modules, the investor opts for **maximum durability and maintenance-free operation**, receiving a technologically advanced solution that protects investment profitability for decades. It is the optimal choice for modern residential and business installations, where the highest reliability must go hand-in-hand with aesthetic execution. ## Notable figures - Efficiency of 22.8% matches the \*\*Back Contact 550-600W\*\* median - Power density of 228.4 W/m² packs 3.9 W/m² more into the same footprint vs \*\*Back Contact 550-600W\*\* median (224.5 W/m²) - At -0.28%/°C, hot weather performance is typical for \*\*Back Contact 550-600W\*\* panels - At 31.8 kg (4.6 kg above \*\*Back Contact 550-600W\*\* median of 27.2 kg), requires checking roof load capacity - Bifacial design (60% factor) captures reflected light - adds 3-9% yield on ground-mount or white roof ## Questions ### What is HPBC technology in the LONGi Solar Hi-MO X6 Guardian and why does it matter? HPBC (High-efficiency Passivated Back Contact) is a Back Contact cell technology that relocates all electrical contacts to the rear side of the cell. The front surface is completely free of busbars, eliminating their shading effect and pushing module efficiency up to 22.8%. In real-world terms, this means higher energy yield from the same roof area compared to standard PERC or even TOPCon cells. ### What warranty does the LONGi Solar Hi-MO X6 Guardian come with? The Hi-MO X6 Guardian series carries a 15-year product warranty covering materials and workmanship, plus a 30-year linear power warranty. After 30 years of operation, the panel retains more than 87.4% of its nominal output. LONGi Solar is a Tier 1 manufacturer with a long track record, which provides solid assurance that warranty claims will actually be honored over the long haul. ### Are the Hi-MO X6 Guardian panels suitable for low-pitch or near-flat roofs? Yes - the Hi-MO X6 Guardian is specifically engineered for these installations. Its patented Anti-Dust frame design flushes the frame edge with the glass surface, eliminating the channel found on conventional panels where dirt, dust, and water accumulate. On roofs below 15° pitch, natural rain-washing is limited, so this feature directly protects system output and return on investment by preventing edge-deposit shading and hot-spot formation. ### How does the Anti-Dust design work in practice and how much extra energy can it deliver? On standard modules the frame protrudes above the glass, forming a pocket where soiling builds up into so-called edge deposits that shade the outermost cells and can trigger hot-spots, dragging down the output of the entire string. In the Hi-MO X6 Guardian, the frame and glass form one flush, smooth surface that promotes self-cleaning. LONGi's testing indicates the design can reduce soiling-related power losses by up to several percentage points annually in dust-prone or low-tilt locations. ### Is the Hi-MO X6 Guardian a bifacial panel, and what does that mean for a residential PV owner? Yes, the Hi-MO X6 Guardian is a bifacial dual-glass module. The rear side captures reflected irradiance (albedo) from the roof or ground surface, which can boost energy yield by 5-15% compared to a monofacial equivalent, depending on surface reflectivity. The dual-glass construction also eliminates the rear PET backsheet, delivering higher long-term resistance to moisture ingress, UV degradation, and PID for the life of the system. ### How does the Hi-MO X6 Guardian 590W perform on overcast days and during summer heat? HPBC Back Contact cells feature a temperature coefficient of approximately -0.29%/°C for Pmax, which is notably better than standard PERC at -0.34%/°C. When the module heats to 65°C on a sunny summer day, power losses are measurably lower than on most competing panels. The passivated back-contact junction also offers slightly better low-light and diffuse-irradiance response, which improves LCOE in Central European climates with frequent cloud cover. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/lr-5-72-htdr-565-590-m-30-30-and-15-frame-guardian-v19-5c0a7-c01ba4119df1.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -30 W, lighter, +2.0 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +50 W, lighter, +2.0 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -35 W, lighter, +1.8 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +45 W, lighter, +1.8 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +40 W, cooler, +1.6 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | -40 W, 16 kg lighter, +1.6 pp | | [Longi Solar RL530HM](https://comparepv.com/panel/longi-solar-rl530hm) | 530 W | -60 W, hotter, -2.1 pp | | [Longi Solar RL535HM](https://comparepv.com/panel/longi-solar-rl535hm) | 535 W | -55 W, hotter, -1.9 pp | | [Longi Solar LR5-72HBD-540M](https://comparepv.com/panel/longi-lr5-72hbd-540m) | 540 W | -50 W, hotter, -1.9 pp | | [Longi Solar RL540HM](https://comparepv.com/panel/longi-solar-rl540hm) | 540 W | -50 W, hotter, -1.7 pp | | [Longi Solar LR5-72HPH-545M](https://comparepv.com/panel/longi-lr5-72hph-545m) | 545 W | Hotter, -1.7 pp, -5 yr warranty | | [Longi Solar RL545HM](https://comparepv.com/panel/longi-solar-rl545hm) | 545 W | Hotter, -1.5 pp, -5 yr warranty | | [Longi Solar LR5-72HBD-550M](https://comparepv.com/panel/longi-lr5-72hbd-550m) | 550 W | -40 W, hotter, -1.5 pp | | [Longi Solar RL550HM](https://comparepv.com/panel/longi-solar-rl550hm) | 550 W | Hotter, -1.3 pp, -5 yr warranty | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +60 W, lighter, +2.4 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +55 W, lighter, +2.2 pp | --- Source: https://comparepv.com/panel/longi-lr5-72htdr-590m Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.