--- title: "GL Solar 3SHBGH-C#-640 640W Solar Panel - Specs & Review | ComparePV" description: "GL Solar 3SHBGH-C#-640 640W solar panel. Specs: 22.60% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/gl-solar-3shbgh-c-640" updated: 2026-09-11 --- # GL Solar 3SHBGH-C#-640 Middle of its segment, weak in heat 76 panels in the segment HJT 600-650 W ## Identity - **Manufacturer:** GL Solar - **Model:** 3SHBGH-C#-640 - **Series:** B60 LE - **Rated power:** 640 W - **Cell technology:** HJT - **Bifacial:** yes ## How it compares Compared against segment HJT 600-650 W (76 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 640 W | 625 W | Strong - top 13% | | | Module efficiency | 22.60% | 22.60% | Typical | 3,658 | | Power density | 226.1 | 225.8 | Typical | 3,681 | | Temperature coefficient | -0.260 | -0.240 | Weak - bottom 18% | 511 | | Weight (kg) | 36.0 kg | 33.6 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.60% | 22.60% | Typical | 3,658 | | Power density | 226.1 | 225.8 | Typical | 3,681 | | Temperature coefficient | -0.260 | -0.240 | Weak - bottom 18% | 511 | | Weight per kWp | 56.2 | 54.7 | Typical | 10,518 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.260 %/°C temperature coefficient** - Bottom 18% of the HJT 600-650 W segment, against a median of -0.240. - **Best for:** Utility-scale, commercial and hot-climate. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 640 W - **Efficiency:** 22.60 % - **Voltage at Pmax (Vmp):** 38.91 V - **Current at Pmax (Imp):** 16.46 A - **Open-circuit voltage (Voc):** 45.70 V - **Short-circuit current (Isc):** 17.56 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.270 %/degC - **Temperature coefficient of Isc:** 0.055 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** HJT - **Cell count:** 120 - **Bifacial:** yes ### Physical - **Length:** 2172 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 36.0 kg - **Area:** 2.83 m2 - **Power density:** 226.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 86.4 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 553 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3658 of 14005 | | Power density | 3681 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 10518 of 14005 | | Warranty | 21 of 14005 | ## Pros - **HJT temperature coefficient: -0.26%/°C** - HJT cells deliver a temperature coefficient of -0.26%/°C vs. -0.30%/°C for TOPCon and -0.35%/°C for PERC. At a cell temperature of 65°C, the HJT panel loses ~10.4% of STC power vs. ~14.0% for a comparable PERC module — a meaningful advantage in utility-scale deployments in warm climates. - **Lowest annual degradation in class** - HJT cells degrade at ~0.27%/year vs. ~0.40%/year for TOPCon and ~0.50%/year for PERC. Over a 30-year asset life, the HJT vs. TOPCon differential translates to ~3.9 percentage points of higher cumulative energy yield — a measurable improvement in project LCOE. - **90% bifaciality factor — glass-glass build** - The bifaciality factor of up to 90% (confirmed for 3SUN B60 LE modules) enables 10–20% additional energy yield in ground-mounted utility-scale installations from reflected irradiance. The glass-glass construction eliminates PID degradation risk and provides robust mechanical protection over the 30-year asset life. - **European manufacturing — EU regulatory upside** - Modules are manufactured in Italy (3SUN/Enel plant in Catania, targeting 3 GW capacity), qualifying for EU regulatory incentives including Italy's 2025 tax break explicitly restricted to EU-manufactured HJT and perovskite modules. Supply chain compliance simplifies ESG-linked project financing and public tender eligibility. - **Up to 22.6% efficiency — premium segment top** - Peak efficiency of 22.6% places the B60 LE above REC Alpha Pro M (22.5%) and on par with MY Solar GOLD HJT (22.61%), reducing BOS land-area requirements. The series sits only 0.3 pp below Suntech Ultra V Pro (22.9%), the highest-efficiency peer comparable in this analysis. ## Cons - **Year-30 power warranty floor: 86.4% vs. 90.75%** - The warranted residual power after 30 years is ≥86.4% Pmax, compared with REC Alpha Pro M's ≥90.75% at ≤0.25%/year degradation. The 4.35 pp gap in warranted end-of-life power may be material when modeling DCF cash flows and satisfying bankability requirements for project-financed utility-scale assets. - **Product warranty: 15 years vs. 20 years (REC)** - The product workmanship warranty covers 15 years, while REC Alpha Pro M provides a standard 20-year product warranty. The shorter coverage period may complicate project finance structures where lenders require manufacturer warranty backing throughout the full loan tenor. ## About this series The B60 LE series is primarily distinguished by the use of **N-type heterojunction HJT solar cell technology**, which provides exceptional efficiency even in low-light and high-temperature conditions - a clear advantage over standard PERC modules commonly available on the market. **Double-sided bifacial design** with a high bifaciality factor allows for energy generation from both the front and the back of the module - reflected light from the ground or adjacent rows is converted into real energy output without additional investment costs. **Glass-on-glass construction** with high-quality tempered glass with low iron content provides excellent mechanical and atmospheric resistance, ensuring long-term reliability in demanding operating conditions. The **European origin of production** is particularly important - modules designed and assembled in Italy meet strict quality standards and gain prominence in the context of sustainable supply chain criteria. The series is primarily targeted at large **utility-scale and commercial/industrial installations**, where the priority is minimizing BOS (Balance of System) costs and maximizing energy yield per unit area. A 30-year performance warranty with linear and low degradation makes it one of the most competitive offerings in the premium module segment. ## Notable figures - Efficiency of 22.6% matches the \*\*HJT 600-650W\*\* median - At 226.1 W/m² power density, roof space requirements are typical for \*\*HJT 600-650W\*\* panels - -0.26%/°C temperature coefficient - 0.02pp worse than \*\*HJT 600-650W\*\* median (-0.24%/°C), expect higher hot weather losses - At 36.0 kg (2.4 kg above \*\*HJT 600-650W\*\* median of 33.6 kg), requires checking roof load capacity - Bifaciality factor of 90% can add 4-14% extra yield with reflective mounting surface ## Questions ### How does HJT cell technology in the GL Solar B60 LE differ from standard PERC modules? HJT (heterojunction) cells combine a monocrystalline silicon wafer with amorphous silicon layers, delivering a lower temperature coefficient and higher efficiency under diffuse light compared to standard PERC modules. In practice, this means better energy yield on overcast days and during morning or evening hours, when PERC panels experience more significant performance losses. ### What is the power warranty for the GL Solar B60 LE and what does linear degradation mean? The B60 LE series comes with a 30-year power output warranty and a 15-year product warranty. Linear degradation means the manufacturer guarantees a gradual, predictable power decline following a fixed schedule over the entire warranty period — with no sudden output drops — enabling more reliable financial modeling for the project's lifetime. ### Is the 640 Wp GL Solar B60 LE panel suitable for large-scale industrial and utility-scale installations? Yes, the B60 LE series with a peak output of 640 Wp is designed specifically for utility-scale projects and commercial or industrial facilities. The high per-module power rating reduces the total panel count required, directly lowering BoS (balance of system) costs and simplifying installation logistics across large surface areas. ### What does bifacial mean for the GL Solar B60 LE and how much extra energy can I expect from the rear side? Bifacial means the module generates electricity from both its front and rear surfaces by capturing light reflected from the ground, rooftop, or adjacent panel rows. The actual energy gain depends on the albedo of the underlying surface (light gravel, white membrane, snow), but typically ranges from a few to over ten percent of additional yield at no extra installation cost. ### Why does Italian manufacturing matter for the GL Solar B60 LE in tenders and subsidy applications? Modules designed and assembled in Italy meet strict European quality standards and make it easier to demonstrate a sustainable supply chain — increasingly required in public tenders and subsidy programs based on Made in Europe criteria. European manufacturing also reduces exposure to import tariffs and the risks associated with long, complex logistics chains. ### How do GL Solar B60 LE panels perform in high summer temperatures? HJT technology has a lower temperature coefficient than PERC cells, so B60 LE modules lose less power as temperatures rise. On hot summer days, when cell temperature can exceed 70°C, these panels maintain higher efficiency than comparable monoPERC modules — resulting in meaningfully higher energy yields over the full annual production cycle, especially in high-irradiance environments. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/3_SUN_B60-610-640W_IT-067a4a3c37af.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +10 W, lighter, +2.6 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +40 W, lighter, +2.6 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +35 W, lighter, +2.4 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Lighter, +2.4 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +30 W, lighter, +2.2 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +30 W, lighter, +2.2 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Lighter, +2.2 pp | | [GL Solar 3SHBGH-C#-610](https://comparepv.com/panel/gl-solar-3shbgh-c-610) | 610 W | -30 W, -1.0 pp | | [GL Solar 3SHBGH-C#-615](https://comparepv.com/panel/gl-solar-3shbgh-c-615) | 615 W | -25 W, -0.9 pp | | [GL Solar 3SHBGH-C#-620](https://comparepv.com/panel/gl-solar-3shbgh-c-620) | 620 W | -20 W, -0.7 pp | | [GL Solar 3SHBGH-C#-625](https://comparepv.com/panel/gl-solar-3shbgh-c-625) | 625 W | -15 W, -0.5 pp | | [GL Solar 3SHBGH-C#-630](https://comparepv.com/panel/gl-solar-3shbgh-c-630) | 630 W | -10 W, -0.3 pp | | [GL Solar 3SHBGH-C#-635](https://comparepv.com/panel/gl-solar-3shbgh-c-635) | 635 W | -0.2 pp | | [Gamko New Energy GKA210N120](https://comparepv.com/panel/gamko-new-energy-gka210n120) | 680 W | Hotter, lighter, +1.4 pp | | [Gamko New Energy GKA210N120-675](https://comparepv.com/panel/gamko-new-energy-gka210n120-675) | 675 W | Hotter, lighter, +1.2 pp | | [Q-SUN Solar QN-670HJT-01](https://comparepv.com/panel/q-sun-solar-qn-670hjt-01) | 670 W | +30 W, cooler, +1.1 pp | --- Source: https://comparepv.com/panel/gl-solar-3shbgh-c-640 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.