--- title: "Phono Solar NS-665MH-132 665W Solar Panel - Specs & Review | ComparePV" description: "Phono Solar NS-665MH-132 665W solar panel. Specs: 21.40% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/phono-solar-ns-665mh-132" updated: 2026-09-11 --- # Phono Solar NS-665MH-132 Middle of its segment, heavy for its output 249 panels in the segment TOPCon 650-700 W ## Identity - **Manufacturer:** Phono Solar - **Model:** NS-665MH-132 - **Series:** Monocrystalline132 - **Rated power:** 665 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 650-700 W (249 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 665 W | 665 W | Typical | | | Module efficiency | 21.40% | 22.40% | Weak - bottom 8% | 8,323 | | Power density | 214.1 | 223.7 | Weak - bottom 9% | 8,250 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 38.7 kg | 34.6 kg | Weak - bottom 5% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.40% | 22.40% | Weak - bottom 8% | 8,323 | | Power density | 214.1 | 223.7 | Weak - bottom 9% | 8,250 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 58.2 | 53.2 | Weak - bottom 5% | 11,622 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **58.2 kg per kWp** - Bottom 5% of the TOPCon 650-700 W segment, against a median of 53.2. Ranked 11,622nd in the whole database. - **21.40% module efficiency** - Bottom 8% of the TOPCon 650-700 W segment, against a median of 22.40%. Ranked 8,323rd in the whole database. - **214.1 watts per square metre** - Bottom 9% of the TOPCon 650-700 W segment, against a median of 223.7. Ranked 8,250th in the whole database. - **Best for:** Residential, commercial, utility-scale and shaded-installations. - **Not ideal for:** Weight-limited structures, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 665 W - **Efficiency:** 21.40 % - **Voltage at Pmax (Vmp):** 38.50 V - **Current at Pmax (Imp):** 17.28 A - **Open-circuit voltage (Voc):** 45.60 V - **Short-circuit current (Isc):** 18.69 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 132 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 30 mm - **Weight:** 38.7 kg - **Area:** 3.11 m2 - **Power density:** 214.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8323 of 14005 | | Power density | 8250 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 11622 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon + half-cut (132 cells)** - N-type TOPCon cells in a 132 half-cut layout reduce resistive losses and improve partial-shading tolerance compared to older PERC modules. Many variants also feature multi-busbar interconnection, which lowers the impact of microcracks on the performance of the whole string. - **Up to 23.5% efficiency, matching segment leaders** - The 730 Wp variant reaches 23.5% efficiency - identical to the best comparable series from the same period (Huasun Himalaya V-ocean, Recom Lynx Series, Hiwatt Solar HW-M12/132G), meaning no performance gap versus the top of the market. - **Tier-1 manufacturer with a 20-year track record** - Phono Solar has operated since 2004 and has been continuously listed on BloombergNEF's Tier-1 list since 2014 based on 'bankability strength', which supports project financing by banks and leasing institutions. - **Broad power range of 500-730 Wp** - 16 power variants from 500 to 730 Wp allow the module to be matched to space-constrained residential roofs as well as large commercial or ground-mount projects without switching technology platforms. - **Structural durability and full black aesthetics** - A robust frame and sealed junction box ease installation on sloped roofs, flat roofs, and ground-mount systems, while full black variants meet demand for a consistent building aesthetic. ## Cons - **Production ended in 2023** - The series was manufactured between 2021 and 2023 and has since been discontinued by the manufacturer. This means limited availability (only existing distributor stock) and potential difficulty with warranty service and matching replacement parts going forward. - **15-year product warranty below current standard** - The product (workmanship) warranty is 15 years, while newer N-type TOPCon series launched from 2024 onward increasingly align the product warranty with the 25-year performance warranty. The power warranty itself (25-30 years, depending on variant) remains competitive. ## About this series The Phono Solar Monocrystalline 132 series consists of modules based on a 132 half-cut cell configuration, designed for high performance in real-world conditions, even when partial shading or uneven sunlight exposure occurs on the roof. The use of **half-cut technology** reduces resistive losses and improves the stability of the entire string, resulting in more predictable annual energy yields. Many variants also feature **multi-busbar connection**, which improves current collection from the cell surface and helps minimize the impact of micro-cracks on module performance. The modules also stand out for their **resistance to environmental conditions** - the robust construction and sealed junction box make them easy to install on pitched and flat roofs, as well as in ground-mounted systems. This makes them a good choice for customers who prioritize **consistent aesthetics** (e.g., in full black versions) and a solution that is easy to integrate with popular inverters and optimizers. The series is suitable for both residential and commercial projects, where consistent quality and reliability are essential. ## Notable figures - Module efficiency of 21.4% is 1.0pp below average for \*\*TOPCon 650-700W\*\* panels (median: 22.4%) - At 214.1 W/m², this panel generates 9.6 W/m² less per unit area than \*\*TOPCon 650-700W\*\* median (223.7 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 650-700W\*\* panels - Weight of 38.7 kg is 4.1 kg above \*\*TOPCon 650-700W\*\* median (34.6 kg) - verify structural support - Ranked #8323 out of 14005 panels for efficiency in the database ## Questions ### What warranty does the Phono Solar Monocrystalline132 series come with? Phono Solar provides a 15-year product warranty and a 30-year linear power output warranty for the Monocrystalline132 series. This means the manufacturer guarantees that module efficiency will remain above a defined threshold for three decades, which is the standard among leading Tier 1 suppliers and provides a solid basis for calculating return on investment. ### Do Phono Solar Monocrystalline132 panels perform well under partial shading? Yes. The Monocrystalline132 series uses a 132 half-cut cell layout that physically splits each cell in two. This means shading on part of the panel — for example from a chimney or dormer — limits losses only to that section while the rest of the module continues operating normally. In variants with multi-busbar cell interconnection, this effect is even more pronounced. ### What is TOPCon technology and is it worth choosing in the Phono Solar Monocrystalline132 series? TOPCon (Tunnel Oxide Passivated Contact) is a next-generation monocrystalline cell featuring a thin tunnel oxide layer that reduces charge carrier recombination and raises conversion efficiency beyond what standard PERC cells can achieve. In practice, this translates to higher energy yields from the same roof area and better performance at elevated temperatures and under diffuse light conditions. ### What is the maximum panel power in the Phono Solar Monocrystalline132 series? The highest power variant in the Monocrystalline132 series reaches 730 Wp. This figure is typical for large-format modules intended for high-capacity residential rooftop systems as well as commercial projects and solar farms, where a high per-panel wattage reduces balance-of-system (BoS) costs per kilowatt-peak installed. ### Is the Phono Solar Monocrystalline132 series compatible with popular inverters available in Europe? Yes. The Monocrystalline132 modules are designed to work with standard string and hybrid inverters as well as power optimizers available on the European market. The series' electrical parameters fall within the input ranges of devices from brands such as SMA, Fronius, Huawei, and SolarEdge, so selecting compatible BoS components is generally straightforward. ### Is the Phono Solar Monocrystalline132 series still available for purchase? The Monocrystalline132 series has been discontinued and is no longer in active production. This means new orders directly from the manufacturer are no longer fulfilled, and availability through distributors is limited to existing stock. If you are planning a new installation, it is worth considering current Phono Solar TOPCon series modules, which offer comparable or superior specifications. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ns-650-670mh-132-2384-1303-30bifacial-823d899223ff.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +3.8 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, lighter, +3.8 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, lighter, +3.6 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +3.6 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +35 W, lighter, +3.6 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +30 W, lighter, +3.5 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, lighter, +3.4 pp | | [Phono Solar NS-650MH-132](https://comparepv.com/panel/phono-solar-ns-650mh-132) | 650 W | -15 W, -0.5 pp | | [Phono Solar NS-655MH-132](https://comparepv.com/panel/phono-solar-ns-655mh-132) | 655 W | -10 W, -0.3 pp | | [Phono Solar NS-660MH-132](https://comparepv.com/panel/phono-solar-ns-660mh-132) | 660 W | Very close match | | [Phono Solar NS-670MH-132](https://comparepv.com/panel/phono-solar-ns-670mh-132) | 670 W | Very close match | | [Phono Solar PS690M13GFH-22/WNH](https://comparepv.com/panel/phono-solar-technology-co-ltd-ps690m13gfh-22-wnh) | 690 W | +25 W, lighter, +0.8 pp | | [Phono Solar PS695M13GFH-22/WNH](https://comparepv.com/panel/phono-solar-technology-co-ltd-ps695m13gfh-22-wnh) | 695 W | +30 W, lighter, +1.0 pp | | [Phono Solar PS700M13GFH-22/WNH](https://comparepv.com/panel/phono-solar-technology-co-ltd-ps700m13gfh-22-wnh) | 700 W | +35 W, lighter, +1.1 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +140 W, cooler, +3.7 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +135 W, cooler, +3.5 pp | --- Source: https://comparepv.com/panel/phono-solar-ns-665mh-132 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.