--- title: "Solar N Plus SP-G12/132HG655W 655W Solar Panel - Specs & Review | ComparePV" description: "Solar N Plus SP-G12/132HG655W 655W solar panel. Specs: 21.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/solar-n-plus-sp-g12-132hg655w" updated: 2026-09-11 --- # Solar N Plus SP-G12/132HG655W Middle of its segment, heavy for its output 320 panels in the segment PERC 650-700 W ## Identity - **Manufacturer:** Solar N Plus - **Model:** SP-G12/132HG655W - **Series:** CYGNUS SP-G12/132HG - **Rated power:** 655 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 650-700 W (320 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 655 W | 660 W | Weak - bottom 25% | | | Module efficiency | 21.10% | 21.25% | Typical | 9,297 | | Power density | 210.9 | 212.5 | Weak - bottom 24% | 9,459 | | Temperature coefficient | -0.350 | -0.340 | Weak - bottom 10% | 10,419 | | Weight (kg) | 38.7 kg | 34.5 kg | Weak - bottom 6% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.10% | 21.25% | Typical | 9,297 | | Power density | 210.9 | 212.5 | Weak - bottom 24% | 9,459 | | Temperature coefficient | -0.350 | -0.340 | Weak - bottom 10% | 10,419 | | Weight per kWp | 59.1 | 52.3 | Weak - bottom 6% | 12,005 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **59.1 kg per kWp** - Bottom 6% of the PERC 650-700 W segment, against a median of 52.3. Ranked 12,005th in the whole database. - **-0.350 %/°C temperature coefficient** - Bottom 10% of the PERC 650-700 W segment, against a median of -0.340. - **210.9 watts per square metre** - Bottom 24% of the PERC 650-700 W segment, against a median of 212.5. - **Best for:** Utility-scale, hot-climate and shaded-installations. - **Not ideal for:** Weight-limited structures, hot climates and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 655 W - **Efficiency:** 21.10 % - **Voltage at Pmax (Vmp):** 37.80 V - **Current at Pmax (Imp):** 17.33 A - **Open-circuit voltage (Voc):** 45.60 V - **Short-circuit current (Isc):** 18.26 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.350 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 132 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 30 mm - **Weight:** 38.7 kg - **Area:** 3.11 m2 - **Power density:** 210.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 556 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9297 of 14005 | | Power density | 9459 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 12005 of 14005 | | Warranty | 21 of 14005 | ## About this series The CYGNUS SP-G12/132HG series is a bifacial photovoltaic module built on **half-cut PERC cells** in the G12 format, arranged in a 6x22 layout that ensures even current distribution and reduces power losses under partial shading. The panel stands out with its **bifacial glass-glass construction**, allowing reflected irradiance from the surrounding surface to translate into a real gain in energy yield, particularly on light-colored roofs, gravel surfaces, or ground-mounted installations. It's a solid choice for investors looking to maximize output per square meter without expanding the installation footprint. The design is optimized for a **low temperature coefficient**, limiting power losses on hot days and improving output stability in warmer climates. The robust dual-glass build, combined with resistance to mechanical loads and hail impact, makes the module well suited for both rooftop systems and utility-scale solar farms. A key advantage of the series is its **low power degradation over time**, backed by a long-term linear performance warranty, which translates into predictable, long-term return on investment and a lower LCOE across the system's lifecycle. The panel is MC4 compatible, simplifying integration with standard BoS components. ## Notable figures - At 21.1% efficiency, this panel is on par with typical \*\*PERC 650-700W\*\* modules - Power density of 210.9 W/m² matches the \*\*PERC 650-700W\*\* median - At -0.35%/°C, hot weather performance is typical for \*\*PERC 650-700W\*\* panels - At 38.7 kg (4.2 kg above \*\*PERC 650-700W\*\* median of 34.5 kg), requires checking roof load capacity - Bifaciality factor of 70% can add 4-10% extra yield with reflective mounting surface ## Questions ### Is the CYGNUS SP-G12/132HG series still available for purchase? No, production of the CYGNUS SP-G12/132HG series has been discontinued and the model is no longer part of the active lineup. Availability is now limited to remaining distributor stock. If you plan to expand an existing installation, act quickly, since matching an identical panel to already installed modules may become difficult, and the manufacturer recommends newer-generation models as replacements. ### What does the bifacial design of the CYGNUS SP-G12/132HG panels mean, and is it worth it? Bifacial design means the module generates energy from both the front and back sides, thanks to a glass rear layer instead of a standard backsheet. Additional light reflected off the ground, especially on light-colored roofs, gravel surfaces, or ground-mount installations, results in a real increase in energy yield without increasing installation area. This makes it especially worthwhile where panels are mounted above a bright surface or on freestanding racking with clearance beneath the module. ### What warranty comes with the CYGNUS SP-G12/132HG panels? Manufacturer Solar N Plus provides a 15-year product warranty and a 30-year linear power warranty. This means guaranteed, gradual power degradation over time instead of a sudden drop in output, supporting a predictable return on investment. Since this model is discontinued, it's worth confirming current service terms directly with your distributor. ### What is the maximum power output of the CYGNUS SP-G12/132HG panel, and how many are needed for a typical installation? The panel reaches a maximum power of 675 Wp thanks to half-cut PERC cells in G12 format arranged in a 6x22 configuration. With this per-unit output, a typical residential 10 kWp installation needs around 15 modules, reducing the total panel count and simplifying installation compared to lower-power modules. ### Do the CYGNUS SP-G12/132HG panels perform well in summer heat? Yes, the series is engineered with a low temperature coefficient of power, which limits output losses on hot days. This matters in summer, when panel surface temperatures can reach 60-70 degrees Celsius and standard modules lose a significant share of their power. This optimization keeps energy production more stable even in warmer climates. ### Are the CYGNUS SP-G12/132HG panels suitable for a gravel roof or ground-mount installation? Yes, these are exactly the setups that make the most of this series' bifacial technology. A light gravel surface or the ground beneath a ground-mount racking system reflects extra sunlight onto the module's glass rear side, boosting real-world energy yield without expanding the installation footprint. The robust dual-glass construction also provides the mechanical durability needed in these conditions. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/SP-G12-132HG-c8ff3f7b066b.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +4.1 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, lighter, +4.1 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, lighter, +3.9 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +3.9 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +45 W, cooler, +3.9 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, lighter, +3.8 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, lighter, +3.7 pp | | [Solar N Plus SP-G12/132HG660W](https://comparepv.com/panel/solar-n-plus-sp-g12-132hg660w) | 660 W | Very close match | | [Solar N Plus SP-G12/132HG665W](https://comparepv.com/panel/solar-n-plus-sp-g12-132hg665w) | 665 W | +10 W, +0.3 pp | | [Solar N Plus SP-G12/132HG670W](https://comparepv.com/panel/solar-n-plus-sp-g12-132hg670w) | 670 W | +15 W, +0.5 pp | | [Solar N Plus SP-G12/132HG675W](https://comparepv.com/panel/solar-n-plus-sp-g12-132hg675w) | 675 W | +20 W, +0.6 pp | | [Solar N Plus SP-N18/132HG-700W](https://comparepv.com/panel/solar-n-plus-sp-n18-132hg-700w) | 700 W | +45 W, cooler, +1.4 pp | | [Solar N Plus SP-N18/132HG-705W](https://comparepv.com/panel/solar-n-plus-sp-n18-132hg-705w) | 705 W | +50 W, cooler, +1.6 pp | | [Solar N Plus SP-N18/132HG-710W](https://comparepv.com/panel/solar-n-plus-sp-n18-132hg-710w) | 710 W | +55 W, cooler, +1.8 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +150 W, cooler, +4.0 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +145 W, cooler, +3.8 pp | --- Source: https://comparepv.com/panel/solar-n-plus-sp-g12-132hg655w 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.