--- title: "Phono Solar PS720M13GFH-22/WSHW 720W Solar Panel - Specs & Review | ComparePV" description: "Phono Solar PS720M13GFH-22/WSHW 720W solar panel. Specs: 23.18% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/phono-solar-co-ltd-phono-solar-technology-co-ltd-ps720m13gfh-22-wshw" updated: 2026-09-11 --- # Phono Solar PS720M13GFH-22/WSHW Solid all-round for its segment 222 panels in the segment HJT 700-750 W ## Identity - **Manufacturer:** Phono Solar - **Model:** PS720M13GFH-22/WSHW - **Series:** Helios Module Series (N-HJT HIGH EFFICIENCY MONO 132-20BB-W-WG) - **Rated power:** 720 W - **Cell technology:** HJT - **Bifacial:** yes ## How it compares Compared against segment HJT 700-750 W (222 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 720 W | 715 W | Typical | | | Module efficiency | 23.18% | 23.02% | Typical | 1,424 | | Power density | 231.8 | 230.2 | Typical | 1,347 | | Temperature coefficient | -0.240 | -0.240 | Typical | 13 | | Weight (kg) | 37.9 kg | 38.3 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.18% | 23.02% | Typical | 1,424 | | Power density | 231.8 | 230.2 | Typical | 1,347 | | Temperature coefficient | -0.240 | -0.240 | Typical | 13 | | Weight per kWp | 52.6 | 53.6 | Typical | 6,266 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Commercial, utility-scale, hot-climate and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 720 W - **Efficiency:** 23.18 % - **Voltage at Pmax (Vmp):** 42.16 V - **Current at Pmax (Imp):** 17.08 A - **Open-circuit voltage (Voc):** 50.22 V - **Short-circuit current (Isc):** 18.15 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.240 %/degC - **Temperature coefficient of Voc:** -0.220 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** HJT - **Cell count:** 132 - **Bifacial:** yes ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 33 mm - **Weight:** 37.9 kg - **Area:** 3.11 m2 - **Power density:** 231.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.0 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.38 % - **Output after 30 years:** 635 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1424 of 14005 | | Power density | 1347 of 14005 | | Temperature coefficient | 13 of 14005 | | Weight | 6266 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type HJT cell technology** - Heterojunction (HJT) cells offer a lower power temperature coefficient and minimal LID/LeTID degradation compared to older PERC cells, and combined with 22.86-23.5% module efficiency this yields higher energy harvest on hot days and under low-light conditions (morning, evening, overcast days). - **30-year linear power warranty** - The manufacturer offers a 30-year power warranty alongside a 15-year product warranty - notably longer than the standard 25 years offered by most PERC/TOPCon modules in this segment, a direct result of HJT's lower degradation rate. - **Glass-glass bifacial construction** - Dual-glass lamination instead of a traditional backsheet improves laminate sealing and mechanical durability, directly supporting the stated 30-year lifespan while enabling effective bifacial energy gain. - **20BB architecture cuts resistive losses** - The multi-busbar 20BB structure reduces resistive losses at cell interconnections and improves partial-shading tolerance - relevant for residential rooftops and commercial roofs with obstructions such as chimneys or antennas. - **Tier-1 bankability since 2014** - Phono Solar (affiliated with the Sinomach group, Fortune 500) has been continuously listed on BloombergNEF's Tier-1 list since 2014, lowering project financing risk and easing access to investment loans or leasing for the installation. ## Cons - **Heavier glass-glass construction** - The dual-glass lamination increases module weight versus standard glass-backsheet panels (typically by low double-digit percentages in this power class), raising roof structural load requirements and transport/installation costs on large rooftop deployments with limited load capacity. - **Short market track record** - The series launched in 2023, so at most roughly 3 years of independent field performance data exist - compared to longer-established PERC/TOPCon series, long-term behavior under Polish climate conditions is harder to verify. ## About this series The Phono Solar Helios Module (N-HJT HIGH EFFICIENCY MONO 132-20BB-W-WG) was designed to maximize energy gain under real-world operating conditions - even when the roof has limited space, and the investor expects stable production for years. Its unique combination of **N-type HJT cells** and **glass-glass dual-string construction** ensures superior mechanical strength and better laminate sealing compared to many standard modules. The application of **20BB multi-string architecture** minimizes connection losses and improves performance under partial shading, which is crucial in single-family home installations and commercial rooftops with obstacles. HJT technology also provides **excellent performance at high temperatures** and a better response to low light conditions, enabling the system to generate more energy in the morning, evening, and on cloudy days. This is the ideal choice for prosumers, agriculture, and businesses seeking reliability, longevity, and real-world growth in self-consumption. ## Notable figures - Efficiency of 23.2% matches the \*\*HJT 700-750W\*\* median - Power density of 231.8 W/m² matches the \*\*HJT 700-750W\*\* median - At -0.24%/°C, hot weather performance is typical for \*\*HJT 700-750W\*\* panels - Bifacial design (90% factor) captures reflected light - adds 4-14% yield on ground-mount or white roof - In the top 10% for efficiency among all HJT panels ## Questions ### What warranty does the Phono Solar Helios Module N-HJT 132-20BB come with? The Phono Solar Helios Module N-HJT 132-20BB series includes a 15-year product warranty covering manufacturing defects, and a 30-year linear power warranty guaranteeing at least 87.4% of rated output after 30 years. This is among the stronger degradation schedules offered by Tier 1 manufacturers and supports a reliable long-term LCOE calculation for both residential and commercial installations. ### Does the Phono Solar Helios HJT series really perform better in high temperatures compared to PERC panels? Yes. HJT cells deliver a temperature coefficient of Pmax around -0.26%/°C, compared to -0.35%/°C or worse for standard PERC modules. At a cell temperature of 70°C, a typical summer scenario in Central Europe, the Helios N-HJT loses roughly 10% of rated power versus 14-15% for PERC. Over a full summer season this difference is reflected in measurable additional kilowatt-hours generated. ### What does the 20-busbar (20BB) architecture in the Phono Solar Helios mean for partial shading? The 20BB design splits current collection across 20 parallel busbars per cell, reducing resistive losses and limiting the impact of localized shading or micro-cracks on overall module output. Compared to older 9BB or 12BB layouts, this architecture improves performance when part of the array is shaded by chimneys, dormers, or roof edges — a common constraint in residential rooftop installations. ### Is the Phono Solar Helios 730 Wp truly bifacial and how much additional energy can the rear glass generate? Yes, the Helios N-HJT 132-20BB is a bifacial module in a glass-glass construction with a bifaciality factor of approximately 85%. Depending on ground albedo and installation geometry, the rear side can contribute 5-25% additional energy yield. Ground-mounted systems with light-colored gravel or white roofing surfaces benefit most. On standard clay roofing tiles the rear-side gain is lower, but still measurable over a 30-year lifetime. ### How heavy and large is the Phono Solar Helios N-HJT 132-20BB 730 Wp module — can a standard residential roof handle it? The 730 Wp module in a 132-cell M10/M12 format measures approximately 2384 × 1303 mm and weighs around 33-35 kg. This is significantly heavier than a typical 400-430 Wp residential panel, so a structural assessment by a certified engineer is mandatory before installation. The series is best suited for flat commercial rooftops, ground-mount systems, and large industrial buildings where the high unit power reduces module count and overall BoS costs. ### Is Phono Solar a reliable manufacturer and is the Helios N-HJT series still available for purchase? Phono Solar (SUMEC Group) is a Bloomberg NEF Tier 1 manufacturer with verified financial and production capacity, in business since 2004. The Helios N-HJT 132-20BB series is currently active and available. The modules carry IEC, TÜV, and MCS certifications, making them eligible for government incentive programs and tax relief schemes in most European markets including Poland. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/gl-en-210-helios-n-132-20bb-710-730w-9db18d4eb188.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | -40 W, lighter, +2.0 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | -45 W, lighter, +1.8 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Hotter, lighter, +1.8 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | -25 W, lighter, +1.7 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | -50 W, lighter, +1.6 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | -50 W, lighter, +1.6 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | -50 W, lighter, +1.6 pp | | [Phono Solar NS-650MH-132](https://comparepv.com/panel/phono-solar-ns-650mh-132) | 650 W | -70 W, hotter, -2.3 pp | | [Phono Solar NS-655MH-132](https://comparepv.com/panel/phono-solar-ns-655mh-132) | 655 W | -65 W, hotter, -2.1 pp | | [Phono Solar NS-660MH-132](https://comparepv.com/panel/phono-solar-ns-660mh-132) | 660 W | -60 W, hotter, -1.9 pp | | [Phono Solar NS-665MH-132](https://comparepv.com/panel/phono-solar-ns-665mh-132) | 665 W | -55 W, hotter, -1.8 pp | | [Phono Solar NS-670MH-132](https://comparepv.com/panel/phono-solar-ns-670mh-132) | 670 W | -50 W, hotter, -1.6 pp | | [Phono Solar PS690M13GFH-22/WNH](https://comparepv.com/panel/phono-solar-technology-co-ltd-ps690m13gfh-22-wnh) | 690 W | -30 W, hotter, -1.0 pp | | [Phono Solar PS695M13GFH-22/WNH](https://comparepv.com/panel/phono-solar-technology-co-ltd-ps695m13gfh-22-wnh) | 695 W | -25 W, hotter, -0.8 pp | | [Phono Solar PS700M13GFH-22/WNH](https://comparepv.com/panel/phono-solar-technology-co-ltd-ps700m13gfh-22-wnh) | 700 W | -20 W, hotter, -0.6 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +85 W, hotter, +1.9 pp | --- Source: https://comparepv.com/panel/phono-solar-co-ltd-phono-solar-technology-co-ltd-ps720m13gfh-22-wshw 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.