--- title: "Heliene 144HC-520 M10 SL BIFACIAL 520W Solar Panel - Specs & Review | ComparePV" description: "Heliene 144HC-520 M10 SL BIFACIAL 520W solar panel. Specs: 20.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heliene-144hc-520-m10-sl-bifacial" updated: 2026-09-11 --- # Heliene 144HC-520 M10 SL BIFACIAL Strong in heat, modest efficiency 706 panels in the segment PERC 500-550 W ## Identity - **Manufacturer:** Heliene - **Model:** 144HC-520 M10 SL BIFACIAL - **Series:** 144HC M10 SL Bifacial - **Rated power:** 520 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 500-550 W (706 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 520 W | 535 W | Weak - bottom 18% | | | Module efficiency | 20.10% | 20.90% | Weak - bottom 3% | 12,102 | | Power density | 201.2 | 209.0 | Weak - bottom 3% | 12,102 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 23% | 8,778 | | Weight (kg) | 29.2 kg | 28.4 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 23% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.10% | 20.90% | Weak - bottom 3% | 12,102 | | Power density | 201.2 | 209.0 | Weak - bottom 3% | 12,102 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 23% | 8,778 | | Weight per kWp | 56.2 | 53.0 | Typical | 10,439 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 23% | 9,798 | ### Strengths - **-0.340 %/°C temperature coefficient** - Top 23% of the PERC 500-550 W segment, against a median of -0.350. ### Watch out for - **20.10% module efficiency** - Bottom 3% of the PERC 500-550 W segment, against a median of 20.90%. Ranked 12,102nd in the whole database. - **201.2 watts per square metre** - Bottom 3% of the PERC 500-550 W segment, against a median of 209.0. Ranked 12,102nd in the whole database. - **25 year performance warranty** - Bottom 23% of the PERC 500-550 W segment, against a median of 30 yrs. - **Best for:** Commercial and shaded-installations. - **Not ideal for:** Tight roof space, roofs where every square metre has to count and owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 520 W - **Efficiency:** 20.10 % - **Voltage at Pmax (Vmp):** 41.56 V - **Current at Pmax (Imp):** 12.52 A - **Open-circuit voltage (Voc):** 49.22 V - **Short-circuit current (Isc):** 13.42 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 - **Bifacial:** yes ### Physical - **Length:** 2279 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 29.2 kg - **Area:** 2.58 m2 - **Power density:** 201.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 86.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.50 % - **Output after 30 years:** 434 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12102 of 14005 | | Power density | 12102 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 10439 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Bifacial + Half-Cut M10: dual energy harvest** - Bifacial technology enables additional rear-side energy yield through the albedo effect (typically +5–15% in ground-mount systems with reflective ground cover). The Half-Cut architecture on M10 cells reduces CTM losses and mitigates the impact of partial shading via split junction box design. - **High mechanical load rating** - The module is rated for 5400 Pa (113 psf) front-side and 2400 Pa (50 psf) rear-side static load per datasheet Rev.03. The 3.2 mm fully tempered front glass provides superior hail resistance. This is a significant advantage for ground-mount installations in high snow- and wind-load zones. - **Tier-1 bankable manufacturer: project financing enabled** - Heliene qualifies as a bankable manufacturer under BNEF criteria (minimum six 10 MW projects financed non-recourse by six different banks). For utility-scale PV assets above 1 MWp, Tier-1 status is a prerequisite for securing non-recourse bank financing and project insurance. - **1500 V DC system voltage** - Support for 1500 V DC systems allows longer strings, fewer inverters, and an estimated 5–8% reduction in BoS costs compared to 1000 V designs. This has been the de-facto standard for commercial and utility-scale installations since 2022. - **Five power variants (520–540 Wp)** - Five variants in the 520–540 Wp range (approximately 5 Wp steps) allow precise string sizing matched to inverter MPPT specifications, minimizing mismatch losses across the array. ## Cons - **PERC technology: efficiency gap vs. market** - Module efficiency of 20.1–20.9% is significantly lower than comparable 540 W panels based on newer cell technologies: Gokin GK-5-60HG reaches 24.4% (+~18%), Horay Solar HS 199R-120 TC-D Delta achieves 23.1% (+~10%). PERC now accounts for less than 20% of global module production (vs. TOPCon at ~65% in 2025 per Fraunhofer ISE), indicating the series is at a technological disadvantage. - **Temperature coefficient inferior to TOPCon/HJT** - The Pmax temperature coefficient is -0.36%/°C (datasheet Rev.03), in line with typical PERC (-0.35%/°C). TOPCon cells achieve -0.31%/°C and HJT -0.26%/°C. At a module operating temperature of 65°C (a common summer condition), the Heliene 144HC M10 SL incurs a ~14.4% power derating vs. ~12.4% for TOPCon — a ~2 pp difference that is measurable in annual energy yield. - **86% power warranty after 25 years — below N-type benchmark** - Heliene guarantees 86% of rated output after 25 years (2% first-year degradation, ~0.5%/year thereafter). Heliene's own successor series — the NTYP SL Bifacial (N-type TOPCon, 555–585 Wp) — specifies \<0.4%/year degradation and >89% power retention after 25 years. Investors with a long LCOE horizon (>20 years) should factor this gap into financial models. ## About this series The Heliene 144HC M10 SL Bifacial series redefines efficiency standards in large commercial installations and solar farms. The key element is the use of **bifacial technology**, which allows for the generation of additional energy not only from direct solar radiation but also from light reflected off the ground. The use of enlarged M10 cells combined with advanced Half-Cut architecture effectively minimizes power losses resulting from internal resistance and partial module shading. These panels solve the problem of limited installation space, offering a significantly higher yield per square meter compared to standard monofacial counterparts. **The design based on 144 half-cells** ensures excellent mechanical stability and increased resistance to extreme weather conditions, which is crucial for investors seeking financial security. This solution is primarily dedicated to professional ground-mounted systems and modern solar tracking structures, where **maximizing yields from the albedo effect** translates into a measurably faster return on investment. Standing out from the competition, this series features rigorous quality control and an optimized thermal profile, which guarantees **high efficiency in full sun**, making it one of the most cost-effective choices for the modern RES sector. ## Notable figures - Efficiency of 20.1% is 0.8pp below the \*\*PERC 500-550W\*\* median (20.9%) - 201.2 W/m² power density is 7.8 W/m² below \*\*PERC 500-550W\*\* median (209.0 W/m²) - requires larger installation area - At -0.34%/°C, hot weather performance is typical for \*\*PERC 500-550W\*\* panels - Bifaciality factor of 70% can add 4-10% extra yield with reflective mounting surface - In the top 86% for efficiency among all PERC panels ## Questions ### What is the warranty on Heliene 144HC M10 SL Bifacial panels? The 144HC M10 SL Bifacial series comes with a 15-year product warranty and a 25-year linear power guarantee. Heliene guarantees a minimum of 99% of rated power output in the first year and a maximum annual degradation rate of 0.4%, resulting in at least 88% of original power after 25 years. This is one of the more favorable degradation profiles among Tier 1 PERC modules currently on the market. ### Does the bifacial technology in the Heliene 144HC M10 SL series actually increase energy yield? Yes. The bifacial PERC cells capture both direct solar irradiance and light reflected from the ground. On bright surfaces such as concrete, gravel, or snow, the albedo effect can boost annual energy yield by 5–15% compared to a monofacial module with the same nominal power rating. The largest gains are seen in ground-mounted systems with sufficient elevation to minimize rear-side shading. ### Are the Heliene 144HC M10 SL Bifacial panels suitable for solar trackers and large-scale PV farms? Yes, this series is designed for large commercial and utility-scale ground-mounted installations, including single-axis tracker systems. The 2279×1134 mm footprint and weight of approximately 29.2 kg match typical single-axis tracker frame specifications. The half-cut architecture with 144 M10 PERC cells reduces mismatch and partial shading losses from structural elements, which is critical for tracker-mounted arrays. ### How does the Heliene 144HC M10 SL Bifacial series perform in low temperatures and overcast conditions? The temperature coefficient of Pmax is -0.36%/°C, meaning output actually increases on cold, sunny days when module temperature drops below 25°C STC. The 3.2 mm fully tempered front glass with anti-reflective coating improves yield under diffuse light and low-angle irradiance. Users have reported reliable output even under heavy snow loads, making this series well-suited for temperate climates. ### What sets the Heliene 144HC M10 SL Bifacial apart from standard monofacial PERC panels? The key difference is the transparent glass rear surface instead of an opaque backsheet, allowing the module to harvest additional power from ground-reflected light. The half-cut design with 144 cells instead of 72 full cells lowers internal resistance and reduces sensitivity to partial shading. At the same 540 W nominal power rating, the SL Bifacial produces measurably more energy annually wherever ground albedo conditions are favorable. ### Is Heliene a Tier 1 manufacturer and where are the 144HC M10 SL Bifacial panels produced? Yes, Heliene is a recognized Tier 1 PV module manufacturer. The company is headquartered in Canada and operates production facilities across North America, including plants in both the US and Canada — making its modules eligible for domestic content incentives under programs such as the IRA. For European projects, panels are distributed through authorized EMEA partners. The North American manufacturing base and rigorous quality control provide added financial security for large-scale renewable energy investments. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/HSPE_144HC_M10_SL_Bifacial_Rev05-1-1-21d4df08c61f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +4.9 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +4.7 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, +4.7 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +4.6 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, +4.5 pp, +5 yr warranty | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +4.4 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +4.4 pp | | [Heliene 144HC-525 M10 SL BIFACIAL](https://comparepv.com/panel/heliene-144hc-525-m10-sl-bifacial) | 525 W | Very close match | | [Heliene 144HC-530 M10 SL BIFACIAL](https://comparepv.com/panel/heliene-144hc-530-m10-sl-bifacial) | 530 W | +10 W, +0.4 pp | | [Heliene 144HC-535 M10 SL BIFACIAL](https://comparepv.com/panel/heliene-144hc-535-m10-sl-bifacial) | 535 W | +15 W, +0.6 pp | | [Heliene 144HC-540 M10 SL BIFACIAL](https://comparepv.com/panel/heliene-144hc-540-m10-sl-bifacial) | 540 W | +20 W, +0.8 pp | | [Heliene 144HC-545 M10 SL BIFACIAL](https://comparepv.com/panel/heliene-144hc-545-m10-sl-bifacial) | 545 W | +25 W, +1.0 pp | | [Heliene 144HC-550 M10 SL BIFACIAL](https://comparepv.com/panel/heliene-144hc-550-m10-sl-bifacial) | 550 W | +30 W, +1.2 pp | | [Heliene 144HC-555 M10 NTYP SL Bifacial](https://comparepv.com/panel/heliene-144hc-555-m10-ntyp-sl-bifacial) | 555 W | +35 W, cooler, +1.4 pp | | [Heliene 144HC-560 M10 NTYP SL Bifacial](https://comparepv.com/panel/heliene-144hc-560-m10-ntyp-sl-bifacial) | 560 W | +40 W, cooler, +1.6 pp | | [Heliene 144HC-565 M10 NTYP SL Bifacial](https://comparepv.com/panel/heliene-144hc-565-m10-ntyp-sl-bifacial) | 565 W | +45 W, cooler, +1.8 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +130 W, cooler, +5.1 pp | --- Source: https://comparepv.com/panel/heliene-144hc-520-m10-sl-bifacial Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.