--- title: "PolyCrown Solar Tech NS-390MH-80 390W Solar Panel - Specs & Review | ComparePV" description: "PolyCrown Solar Tech NS-390MH-80 390W solar panel. Specs: 20.69% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/polycrown-solar-tech-ns-390mh-80" updated: 2026-09-11 --- # PolyCrown Solar Tech NS-390MH-80 Middle of its segment, short guarantee 6,208 panels in the 290-490 W band, all technologies ## Identity - **Manufacturer:** PolyCrown Solar Tech - **Model:** NS-390MH-80 - **Series:** Monocrystalline60 - **Rated power:** 390 W - **Cell technology:** Monocrystalline ## How it compares Compared against 290-490 W band, all technologies (6208 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 390 W | 430 W | Weak - bottom 20% | | | Module efficiency | 20.69% | 21.26% | Typical | 10,976 | | Power density | 206.9 | 212.5 | Typical | 10,898 | | Temperature coefficient | -0.290 | -0.300 | Typical | 2,165 | | Weight (kg) | 20.0 kg | 22.3 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.69% | 21.26% | Typical | 10,976 | | Power density | 206.9 | 212.5 | Typical | 10,898 | | Temperature coefficient | -0.290 | -0.300 | Typical | 2,165 | | Weight per kWp | 51.3 | 53.3 | Typical | 4,670 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,798 | ### Watch out for - **25 year performance warranty** - Bottom 19% of the 290-490 W band, against a median of 30 yrs. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 390 W - **Efficiency:** 20.69 % - **Voltage at Pmax (Vmp):** 38.42 V - **Current at Pmax (Imp):** 10.16 A - **Open-circuit voltage (Voc):** 44.88 V - **Short-circuit current (Isc):** 10.86 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 count:** 70 ### Physical - **Length:** 1900 mm - **Width:** 992 mm - **Thickness:** 30 mm - **Weight:** 20.0 kg - **Area:** 1.88 m2 - **Power density:** 206.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 89.0 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.42 % - **Output after 30 years:** 339 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10976 of 14005 | | Power density | 10898 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 4670 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Up to 22.28% efficiency in top variant** - The highest-power variant in the series reaches 22.28% efficiency, exceeding comparable M10 PERC modules such as GCL-M10/54H (21.5%), RedSolar P series (21.52%), and Jinko JS-PERC (21.7%). This is a genuine advantage within the PERC-based module segment. - **Power up to 420 Wp matches segment leaders** - The series' upper power limit of 420 Wp matches the strongest variants among peer comparables (GCL, RedSolar, Jinko Solar), enabling competitive power density per square meter of roof space where mounting area is limited. - **Reinforced frame for snow and wind loads** - The frame construction is optimized for extreme mechanical loads (accumulated snow, strong wind gusts) and is directly tailored to Polish climate conditions, reducing the risk of microcracks and failures during winter. - **High PID resistance** - Cells resistant to potential-induced degradation (PID), combined with anti-reflective tempered glass, ensure stable long-term energy yield, which is relevant given the 25-year power warranty. ## Cons - **PERC technology instead of N-type TOPCon** - P-type PERC cells are approaching their theoretical efficiency ceiling and show a higher temperature coefficient than newer N-type cells. The global market shifted toward TOPCon in 2026 (roughly 49-60% share), which comparable manufacturers such as Jinko Solar already offer in their flagship series. - **Wide efficiency spread within the series** - The series' lower efficiency bound is 19.66%, about 1.8-2 percentage points below the average efficiency of the peer comparables (21.5-21.7%). Variants closer to 320 Wp perform noticeably worse than the series' top-bin variants. - **Standard, not extended warranty** - The 15-year product warranty and 25-year power warranty match the market baseline but fall short of leading N-type manufacturers (e.g., Jinko Tiger Neo's 30-year linear power warranty guaranteeing at least 87.4% output). - **Limited production scale and brand recognition** - The Ningbo facility's annual production capacity is about 200 MW - a small scale compared to gigawatt-level tier-1 manufacturers like Jinko Solar, which may affect warranty service availability and project bankability for financing institutions. ## About this series The PolyCrown Solar Tech Monocrystalline60 series is an advanced solution based on **monocrystalline silicon cell technology**, which ensures high energy conversion efficiency even in less favorable lighting conditions. These panels are characterized by exceptional resistance to potential-induced degradation, which guarantees long-term stability of energy yields. Thanks to the use of **high-transmittance anti-reflective tempered glass**, these modules maximize solar radiation absorption, translating into a faster return on investment for the prosumer. The frame design has been optimized for extreme mechanical loads, such as heavy snow or strong wind gusts, making them an ideal choice for the Polish climate. The Monocrystalline60 series solves the problem of limited installation space by offering high power density per square meter of roof surface. It is a solution dedicated to both modern residential installations and smaller commercial systems, where **trouble-free operation for decades** is key. Compared to the competition, PolyCrown products stand out with an excellent price-to-quality ratio and a precise cell selection process, which minimizes the risk of micro-cracks. The use of **PERC technology** allows for more efficient use of the infrared spectrum, significantly increasing the efficiency of the entire system on hot days. ## Notable figures - At 20.7% efficiency, this panel is 1.1pp below the \*\*database\*\* median of 21.8% - Power density of 206.9 W/m² is 11.2 W/m² below \*\*database\*\* median (218.1 W/m²) - needs more roof space - At -0.29%/°C, hot weather performance is typical for \*\*database\*\* panels - At 20.0 kg, this panel is 6.5 kg lighter than \*\*database\*\* median (26.5 kg) - easier handling during installation - Ranked #10976 out of 14005 panels for efficiency in the database ## Questions ### What warranty does the PolyCrown Solar Tech Monocrystalline60 series come with? PolyCrown Solar Tech provides two independent warranties for the Monocrystalline60 series: a 15-year product warranty covering material and manufacturing defects, and a 25-year linear power output warranty protecting against excessive cell degradation. This means the manufacturer guarantees a minimum percentage of the rated 420 Wp output for a full quarter-century — a solid protection level consistent with premium-tier PV module standards. ### Can PolyCrown Monocrystalline60 panels handle heavy snow loads and strong winds typical of Central European winters? Yes, the Monocrystalline60 series is engineered for demanding climate conditions. The aluminum frame is optimized for extreme mechanical loads from snow accumulation and strong wind gusts. PolyCrown specifically positions this series as well-suited for the Polish climate, making it a reliable choice for roof-mounted systems exposed to significant winter weather stress without risk of frame deformation or glass damage. ### What is PERC technology and what advantages does it provide in the Monocrystalline60 series? PERC (Passivated Emitter and Rear Cell) adds a passivation layer on the rear side of each cell, reflecting unabsorbed photons back into the silicon structure for a second absorption pass. In the Monocrystalline60 modules, this improves utilization of the infrared spectrum and helps sustain higher efficiency on hot days when standard monocrystalline cells typically lose output due to elevated operating temperatures — resulting in measurably better annual energy yield per installed kilowatt-peak. ### Does the Monocrystalline60 series perform well under overcast skies common in Northern and Central Europe? Yes, the monocrystalline cells in the Monocrystalline60 series respond well to diffuse irradiance. The high-transmittance anti-reflective tempered glass maximizes photon absorption even under heavy cloud cover, which is a significant advantage in climates where direct irradiance is limited throughout much of the year. This translates to better annual energy output compared to older polycrystalline technology at equivalent installed capacity. ### How many PolyCrown Monocrystalline60 panels do I need for a 10 kWp system and how much roof space will they require? At a peak output of 420 Wp per module, a 10 kWp system requires approximately 24 panels. The high power density of the Monocrystalline60 series is especially valuable on roofs with limited available area — you achieve greater nameplate capacity from fewer modules and a smaller footprint compared to older-generation panels, reducing BoS costs and simplifying the racking design. ### How does the Monocrystalline60 series differ from bifacial panels, and is the lack of bifaciality a drawback? The Monocrystalline60 is a monofacial module — it generates power exclusively from the front cell surface. Bifacial modules can produce an additional 5–20% energy from rear-side albedo reflection, but require elevated racking and a light-colored ground surface to realize that gain. For standard pitched roof installations or ground mounts without a reflective substrate, the difference is marginal, and the Monocrystalline60 delivers a more favorable price-to-yield ratio for typical residential and small commercial deployments. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ns-380-420mh-70-1900-992-30-562abce8b15d.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Luxor Solar LX-440M/182-108+GG](https://comparepv.com/panel/luxor-solar-lx-440m-182-108-gg) | 440 W | +50 W, +2.4 pp, +5 yr warranty | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | -50 W, +2.3 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +2.3 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | Lighter, +2.3 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/2\*4\*20)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-2-4-20) | 400 W | Lighter, +2.3 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/4\*4\*40)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-4-4-40) | 400 W | Lighter, +2.3 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | Lighter, +2.3 pp, +5 yr warranty | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +50 W, +2.2 pp, +5 yr warranty | | [PolyCrown Solar Tech NS-380MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-380mh-80) | 380 W | -10 W, -0.5 pp | | [PolyCrown Solar Tech NS-400MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-400mh-80) | 400 W | +10 W, +0.5 pp | | [PolyCrown Solar Tech NS-410MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-410mh-80) | 410 W | +20 W, +1.1 pp | | [PolyCrown Solar Tech NS-420MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-420mh-80) | 420 W | +30 W, +1.6 pp | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | +85 W, +3.3 pp, +15 yr warranty | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | +80 W, +3.0 pp, +15 yr warranty | | [Maxeon SPR-MAX7-465](https://comparepv.com/panel/maxeon-spr-max7-465) | 465 W | +75 W, +2.8 pp, +15 yr warranty | | [Maxeon SPR-MAX6-440](https://comparepv.com/panel/maxeon-spr-max6-440) | 440 W | +50 W, +2.1 pp, +15 yr warranty | --- Source: https://comparepv.com/panel/polycrown-solar-tech-ns-390mh-80 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.