--- title: "Longi Solar LR5-66HTH-530M 530W Solar Panel - Specs & Review | ComparePV" description: "Longi Solar LR5-66HTH-530M 530W solar panel: 1 shop offer from 386.40 zł. Specs: 22.30% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/longi-lr5-66hth-530m" updated: 2026-10-03 --- # Longi Solar LR5-66HTH-530M Middle of its segment, short guarantee 8,332 panels in the 430-630 W band, all technologies ## Identity - **Manufacturer:** Longi Solar - **Model:** LR5-66HTH-530M - **Series:** Hi-MO X6 Explorer - **Rated power:** 530 W - **Cell technology:** Monocrystalline ## Price offers Prices are the figure each shop printed, on that shop's side of VAT. | Shop | Market | Price | Per kWp | Availability | Last read | | --- | --- | --- | --- | --- | --- | | [Falowniki Online](https://comparepv.com/go/3934) | Poland | 386.40 zł incl. VAT | 729.06 zł/kWp | Not stated | Last read 3 Oct 02:45 | ## How it compares Compared against 430-630 W band, all technologies (8332 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 530 W | 515 W | Typical | | | Module efficiency | 22.30% | 22.18% | Typical | 5,100 | | Power density | 223.2 | 221.7 | Typical | 5,050 | | Temperature coefficient | -0.290 | -0.300 | Typical | 2,165 | | Weight (kg) | 26.0 kg | 27.0 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 11% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.30% | 22.18% | Typical | 5,100 | | Power density | 223.2 | 221.7 | Typical | 5,050 | | Temperature coefficient | -0.290 | -0.300 | Typical | 2,165 | | Weight per kWp | 49.1 | 52.7 | Typical | 2,698 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 11% | 9,798 | ### Watch out for - **25 year performance warranty** - Bottom 11% of the 430-630 W band, against a median of 30 yrs. - **Best for:** Residential, commercial, utility-scale, shaded-installations and hot-climate. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 530 W - **Efficiency:** 22.30 % - **Voltage at Pmax (Vmp):** 40.22 V - **Current at Pmax (Imp):** 13.18 A - **Open-circuit voltage (Voc):** 48.57 V - **Short-circuit current (Isc):** 14.00 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/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 count:** 132 ### Physical - **Length:** 2094 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 26.0 kg - **Area:** 2.37 m2 - **Power density:** 223.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 88.9 % - **First-year degradation:** 1.50 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 461 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 5100 of 14005 | | Power density | 5050 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 2698 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Back contact HPBC cell technology** - The use of back contact HPBC cells eliminates the front-side busbar grid, improving light absorption and delivering higher efficiency (up to 22.7%) plus more stable output during morning, afternoon, and diffuse-light conditions compared to conventional PERC/TOPCon cells. - **Efficiency at the top of the segment** - Peak efficiency of 22.7% matches or slightly exceeds comparable N-type 585 W modules (Hanersun Hitouch 5N and Q-SUN Qrystal N8 at 22.65%, Risen RSM144-9 at 22.6%), confirming a top-tier position in the market segment. - **Full back welding - microcrack resistance** - Full back welding technology reinforces cell interconnections across the entire rear surface, reducing microcrack risk under wind, snow, and thermal cycling loads - important for long-term reliability on sloped roof installations. - **Extended linear power warranty** - A power warranty of up to 30 years (with a 15-year product warranty) exceeds the industry-standard 25/12-year package, giving investors a longer horizon of predictable energy yield and stronger investment protection. - **Tier-1 bankable manufacturer, 25+ years** - Longi Solar has operated since 2000 and holds Tier-1 bankable status, meaning financial credibility recognized by banks and insurers financing commercial installations, and lower investor risk compared to less-established peer brands (Hanersun, Q-SUN). ## Cons - **Production discontinued in 2025** - The Hi-MO X6 Explorer series, launched in 2022, was discontinued in 2025. This means limited availability of replacement parts and constrained warranty servicing over the long term compared to models still in active production. - **No bifacial variant** - The back contact HPBC design, with metallization on the rear cell surface, precludes bifacial operation - unlike many N-type TOPCon panels that offer an additional 3-8% yield from bifaciality, e.g., on light-colored ground or elevated racking. ## About this series Longi Solar Hi-MO X6 Explorer series was designed for maximum energy yield from the same rooftop surface - especially in locations where every square meter counts and high module performance is crucial even under varying weather conditions. The key difference compared to many standard panels lies in the application of **HPBC back-contact cells**, which improves light utilization and supports stable power generation even under weaker sunlight. In practice, this translates to a real advantage during morning, afternoon, and partially cloudy periods. The Hi-MO X6 Explorer also features **enhanced resistance to micro-cracking** thanks to **full back welding technology**, ensuring longer, trouble-free operation - crucial for installations exposed to wind, snow, and cyclic temperature changes. The series also stands out with its **elegance and clean appearance**, making it a perfect fit for modern residential buildings and premium designs. This is an excellent choice for both residential and commercial installations where high efficiency, reliability, and predictable energy output over time are key priorities. ## Notable figures - Efficiency of 22.3% matches the \*\*database\*\* median - Power density of 223.2 W/m² packs 5.1 W/m² more into the same footprint vs \*\*database\*\* median (218.1 W/m²) - Temperature coefficient of -0.29%/°C matches the \*\*database\*\* median - In the top 36% for efficiency among all N-type panels ## Questions ### Is the Longi Solar Hi-MO X6 Explorer series still available for purchase? The Hi-MO X6 Explorer series has been discontinued by LONGi Solar and is no longer manufactured. Some distributors may still hold remaining inventory, but availability is limited and varies by seller. If you are considering this model, confirm current stock with your local PV distributor before committing to a system design. ### What is HPBC technology in the Hi-MO X6 Explorer panels and why does it matter? HPBC (Hybrid Passivated Back Contact) is a cell architecture where all electrical contacts are relocated to the rear of the cell, leaving the entire front surface unobstructed for light absorption. In the Hi-MO X6 Explorer this results in module efficiency up to 22.6% and stronger output during morning hours, late afternoon, and partially overcast conditions compared to conventional PERC modules. ### How do the Longi Hi-MO X6 Explorer panels perform under cloudy skies and low irradiance? The HPBC cells in the Hi-MO X6 Explorer have a low temperature coefficient of -0.290%/°C and high sensitivity to diffuse irradiance. Real-world energy yield is noticeably higher than comparably rated PERC modules in low-light conditions — particularly relevant in Central European climates where extended overcast periods are common for much of the year. ### What warranty does the Longi Solar Hi-MO X6 Explorer come with? LONGi Solar provides a 15-year product warranty covering manufacturing defects and material failures, plus a 30-year linear power warranty on the Hi-MO X6 Explorer. First-year power degradation is capped at 1%, with a maximum of 0.4% per year thereafter. This is one of the longer warranty standards available in the premium module segment. ### What are the dimensions and weight of the Hi-MO X6 Explorer 585W — will it fit on a standard pitched roof? The Hi-MO X6 Explorer 585W measures 2278 × 1134 × 35 mm and weighs 27.5 kg. This is a large, heavy commercial-class module. Before installation, confirm that the roof structure and racking system are rated for this size and load. On smaller roof sections or weight-restricted structures, a lower-wattage variant from the same series may be more appropriate. ### Can the Hi-MO X6 Explorer handle snow loads and strong wind conditions typical of Polish climates? Yes. The module uses full back welding technology to minimize micro-crack formation under mechanical stress and thermal cycling. LONGi certifies a front-side static load rating of 5,400 Pa and a rear-side rating of 2,400 Pa — values sufficient for the wind and snow load conditions typical across Poland and Central Europe. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/lr-5-66-hth-520-540-m-35-35-and-15-frame-explorer-v19-72952a-5cce9fe48297.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, +2.7 pp, +5 yr warranty | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Lighter, +2.5 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +30 W, +2.5 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, +2.4 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, +2.3 pp, +5 yr warranty | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Lighter, +2.2 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, +2.2 pp, +5 yr warranty | | [Longi Solar LR5-66HPH-510M](https://comparepv.com/panel/longi-green-energy-technology-co-ltd-lr5-66hph-510m) | 510 W | -20 W, hotter, -0.8 pp | | [Longi Solar LR5-66HPH-515M](https://comparepv.com/panel/longi-green-energy-technology-co-ltd-lr5-66hph-515m) | 515 W | -15 W, hotter, -0.6 pp | | [Longi Solar LR5-66HTH-520M](https://comparepv.com/panel/longi-lr5-66hth-520m) | 520 W | -10 W, -0.4 pp | | [Longi Solar LR5-66HTH-525M](https://comparepv.com/panel/longi-lr5-66hth-525m) | 525 W | Very close match | | [Longi Solar LR5-66HTH-535M](https://comparepv.com/panel/longi-lr5-66hth-535m) | 535 W | Very close match | | [Longi Solar LR5-66HTH-540M](https://comparepv.com/panel/longi-lr5-66hth-540m) | 540 W | +10 W, +0.4 pp | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +60 W, +1.5 pp, +5 yr warranty | | [Gamko New Energy GKA120N-PRO-585W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-585w) | 585 W | +55 W, +1.3 pp, +5 yr warranty | | [Bisol BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 W | +50 W, +1.2 pp, +5 yr warranty | --- Source: https://comparepv.com/panel/longi-lr5-66hth-530m Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.