--- title: "Jinko Solar JS320M Solar Panel: Specs & Datasheet | ComparePV" description: "Jinko Solar JS320M solar panel. Specs: 19.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/jinko-solar-js320m" image: "https://comparepv.com/og/panel/jinko-solar-js320m.png" updated: 2026-09-11 --- # Jinko Solar JS320M Strong in heat, no clear weak spot 291 panels in the segment PERC 300-350 W ## Identity - **Manufacturer:** Jinko Solar - **Model:** JS320M - **Series:** JS Solar 120 Series - **Rated power:** 320 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 300-350 W (291 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 320 W | 325 W | Typical | | | Module efficiency | 19.00% | 19.00% | Typical | 13,037 | | Power density | 189.6 | 190.0 | Typical | 13,047 | | Temperature coefficient | -0.280 | -0.360 | Strong - top 1% | 1,347 | | Weight (kg) | 19.0 kg | 19.0 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.00% | 19.00% | Typical | 13,037 | | Power density | 189.6 | 190.0 | Typical | 13,047 | | Temperature coefficient | -0.280 | -0.360 | Strong - top 1% | 1,347 | | Weight per kWp | 59.4 | 60.3 | Typical | 12,208 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### Strengths - **-0.280 %/°C temperature coefficient** - Top 1% of the PERC 300-350 W segment, against a median of -0.360. Ranked 1,347th in the whole database. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 320 W - **Efficiency:** 19.00 % - **Voltage at Pmax (Vmp):** 33.40 V - **Current at Pmax (Imp):** 9.58 A - **Open-circuit voltage (Voc):** 40.10 V - **Short-circuit current (Isc):** 10.15 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.280 %/degC - **Temperature coefficient of Voc:** -0.360 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 120 ### Physical - **Length:** 1684 mm - **Width:** 1002 mm - **Thickness:** 35 mm - **Weight:** 19.0 kg - **Area:** 1.69 m2 - **Power density:** 189.6 Wp/m2 ### Warranty and degradation - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 80.7 % - **Output after 30 years:** 246 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 13037 of 14129 | | Power density | 13047 of 14129 | | Temperature coefficient | 1347 of 14129 | | Weight | 12208 of 14129 | | Warranty | 9912 of 14129 | ## Pros - **BNEF #1 bankability for a decade** - JinkoSolar ranked #1 in the Bloomberg BNEF PV Module Bankability Survey with 100% bankability for 10 consecutive years (including 2024). For project finance scenarios, this is the strongest manufacturer credibility signal available among the listed peer comparables and the broader Tier-1 segment. - **Up to 20.7% efficiency - above peer median** - The top variant of the series reaches 20.7% module efficiency, outperforming the comparable JA Solar JAM60D10 (20.4%) and significantly surpassing Hiwatt HW-P372H (17.8%). Among listed peers, only YS Solar SM-90 (21%) marginally exceeds the JS Solar 120's top variant. The six-variant power range (320-350 Wp) supports flexible string design across different roof configurations. - **120-cell half-cut format - improved shading tolerance** - The 120-cell half-cut layout (60×2) halves the current path within each cell, reducing resistive losses and lowering operating cell temperature. Under partial shading, the module loses proportionally less power than a conventional 60-cell design, stabilizing MPPT string behavior and simplifying inverter and BoS selection. - **25-year linear power warranty** - The BNEF #1 Tier-1 manufacturer backs the series with a 25-year linear power output warranty - matching peer comparable JA Solar. The combination of long warranty terms and Jinko's demonstrated global service infrastructure (manufacturing on three continents) reduces counterparty risk in LCOE calculations. ## Cons - **PERC technology - higher LID and degradation** - P-type PERC cells are susceptible to Light-Induced Degradation (LID): first-year power loss typically reaches 1-3%, and annual degradation runs 0.6-0.8% vs. 0.4-0.5% for N-type TOPCon. Over a 25-year operating life, this translates to approximately 2-4 percentage points of cumulative yield deficit relative to N-type modules. As of 2024, TOPCon accounts for roughly 66% of global manufacturing capacity, surpassing PERC as the leading cell technology. - **2019 design - missing modern features** - The series launched in 2019 and has not received a generational upgrade to N-type or a bifacial variant in seven years on the market. The absence of bifacial capability forfeits rear-side irradiance gains (typically +5-25% in ground-mounted systems), and the P-type architecture carries a higher temperature coefficient (-0.36 to -0.39%/°C vs. -0.30%/°C for HJT), resulting in measurable summertime yield loss compared to current-generation alternatives. ## About this series The Jinko Solar JS Solar 120 Series is designed for installations where maximum power density and predictable performance over the years are crucial, even under varying weather conditions. The use of modern cell architecture and a refined laminate construction results in **high efficiency in real-world conditions** - the panel performs better under partial shading, morning and evening solar dips, and higher temperatures. This solution is for investors who want to minimize production losses while also simplifying installation design. **Stable chain performance** makes it easier to select inverters and protection devices, and **enhanced mechanical strength** helps in installations exposed to wind and snow loads. The JS Solar 120 Series is suitable for rooftops of homes and businesses, carports, and projects where aesthetics and cable management are important. It stands out from many competing modules due to its **balanced approach to performance and durability** - without compromising daily operation. ## Notable figures - At 19.0% efficiency, this panel is on par with typical \*\*PERC 0-400W\*\* modules - Power density of 189.6 W/m² is 4.6 W/m² below \*\*PERC 0-400W\*\* median (194.2 W/m²) - needs more roof space - -0.28%/°C temperature coefficient (median: -0.36%/°C) - retains ~3% more power at high temperatures - Weight of 19.0 kg (1.5 kg below \*\*PERC 0-400W\*\* median of 20.5 kg) allows easier transport and roof mounting - In the top 92% for efficiency among all PERC panels ## Questions ### What is the power output warranty for the Jinko Solar JS Solar 120 Series? The JS Solar 120 Series comes with a 25-year linear power output warranty, meaning the manufacturer guarantees a defined minimum performance level throughout that period. Jinko Solar also provides a standard product warranty covering material and workmanship defects. As a Bloomberg NEF Tier 1 manufacturer, Jinko Solar is considered one of the most financially stable module suppliers, making their long-term warranty commitments credible. ### How does the JS Solar 120 Series PERC panel perform in low-light and overcast conditions? The PERC cell technology in the JS Solar 120 Series improves energy harvesting under diffuse irradiance, resulting in better performance on cloudy days and during morning or evening hours. The rear-surface passivation layer reduces electron recombination and boosts efficiency at low irradiance levels. In climates with frequent overcast conditions, this translates into measurably higher annual energy yield compared to standard P-type modules. ### What is the maximum power output of the JS Solar 120 Series and how many panels does a household need? Modules in the JS Solar 120 Series reach up to 350 Wp under STC conditions. For a typical single-family home with annual consumption of 4,000-5,000 kWh, you generally need 10 to 14 panels (a 3.5-5 kWp system). The exact number depends on usable roof area, orientation, tilt angle, and local solar irradiance. A certified PV installer should size the system based on an actual site assessment. ### Are Jinko Solar JS Solar 120 Series panels suitable for a pitched roof with partial shading from a chimney or dormer window? The JS Solar 120 Series is a solid choice for rooftop installations with layout constraints. PERC cell architecture limits hot-spot formation and reduces mismatch losses under partial shading compared to older polycrystalline technology. For roofs with significant shading, pairing the modules with power optimizers or microinverters is recommended - this isolates underperforming panels and prevents a single shaded module from pulling down the output of the entire string. ### Does the JS Solar 120 Series perform well in winter and during high summer temperatures? PERC panels, including the JS Solar 120 Series, handle cold winters well - lower cell temperatures actually increase efficiency, so bright winter days can be surprisingly productive. In summer, higher temperatures reduce voltage and power output. The temperature coefficient for Jinko Solar PERC modules is typically around -0.35 to -0.40%/°C, which is competitive among P-type technologies and helps limit thermal power losses during peak summer heat. ### Is Jinko Solar a reliable manufacturer and where is the JS Solar 120 Series produced? Jinko Solar is a Chinese manufacturer with a long-standing position on the Bloomberg NEF Tier 1 list, confirming its financial stability and ability to honor warranty obligations for the full 25-year term. The company is among the largest PV module suppliers globally and holds IEC, MCS, and other certifications required by European markets. Chinese origin does not imply lower quality - Jinko Solar undergoes independent third-party audits and consistently ranks among top performers in PV module reliability studies. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/JS158MHC120-350W-1a4cedfc250d.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | -20 W, lighter, +4.3 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | -20 W, lighter, +4.3 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Lighter, +4.3 pp, +5 yr warranty | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | +10 W, lighter, +4.1 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | +10 W, lighter, +4.1 pp | | [Heckert Solar ZEUS 3.2 285WP FullBlack](https://comparepv.com/panel/heckert-solar-zeus-3-2-285wp-fullblack) | 285 W | -35 W, +4.1 pp, +5 yr warranty | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | Lighter, +4.0 pp, +5 yr warranty | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | -50 W, lighter, +4.0 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | Lighter, +4.0 pp, +5 yr warranty | | [Jinko Solar JKM325M-60H-V](https://comparepv.com/panel/jinko-solar-jkm325m-60h-v) | 325 W | Hotter, +0.3 pp | | [Jinko Solar JKM330M-60H-V](https://comparepv.com/panel/jinko-solar-jkm330m-60h-v) | 330 W | +10 W, hotter, +0.6 pp | | [Jinko Solar JKM335M-60H-V](https://comparepv.com/panel/jinko-solar-jkm335m-60h-v) | 335 W | +15 W, hotter, +0.9 pp | | [Jinko Solar JKM340M-60H-V](https://comparepv.com/panel/jinko-solar-jkm340m-60h-v) | 340 W | +20 W, hotter, +1.1 pp | | [Jinko Solar JKM345M-60H-V](https://comparepv.com/panel/jinko-solar-jkm345m-60h-v) | 345 W | +25 W, hotter, +1.4 pp | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +120 W, +3.9 pp, +5 yr warranty | | [Jetion JT435SYk(B)](https://comparepv.com/panel/jetion-jt435syk-b) | 435 W | +115 W, +3.7 pp, +5 yr warranty | --- Source: https://comparepv.com/panel/jinko-solar-js320m Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.