--- title: "Jolywood JW-HT120N-R3-485 485W Solar Panel - Specs & Review | ComparePV" description: "Jolywood JW-HT120N-R3-485 485W solar panel. Specs: 21.90% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-ht120n-r3-485" updated: 2026-09-11 --- # Jolywood JW-HT120N-R3-485 Strong in heat, modest efficiency 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Jolywood - **Model:** JW-HT120N-R3-485 - **Series:** JW-HT120N-R3 (Light Series) - **Rated power:** 485 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 485 W | 465 W | Strong - top 20% | | | Module efficiency | 21.90% | 22.52% | Weak - bottom 14% | 6,783 | | Power density | 219.3 | 225.2 | Weak - bottom 15% | 6,722 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 11% | 1,309 | | Weight (kg) | 24.0 kg | 24.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.90% | 22.52% | Weak - bottom 14% | 6,783 | | Power density | 219.3 | 225.2 | Weak - bottom 15% | 6,722 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 11% | 1,309 | | Weight per kWp | 49.5 | 52.2 | Typical | 3,021 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.280 %/°C temperature coefficient** - Top 11% of the TOPCon 450-500 W segment, against a median of -0.290. ### Watch out for - **21.90% module efficiency** - Bottom 14% of the TOPCon 450-500 W segment, against a median of 22.52%. - **219.3 watts per square metre** - Bottom 15% of the TOPCon 450-500 W segment, against a median of 225.2. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 485 W - **Efficiency:** 21.90 % - **Voltage at Pmax (Vmp):** 36.74 V - **Current at Pmax (Imp):** 13.20 A - **Open-circuit voltage (Voc):** 42.78 V - **Short-circuit current (Isc):** 14.00 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.280 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 120 ### Physical - **Length:** 1950 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 24.0 kg - **Area:** 2.21 m2 - **Power density:** 219.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 424 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6783 of 14005 | | Power density | 6722 of 14005 | | Temperature coefficient | 1309 of 14005 | | Weight | 3021 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon – minimal LID degradation** - N-type cells exhibit virtually no light-induced degradation (LID): first-year degradation is capped at \<1.0% versus 2–3% in P-type PERC modules. Annual linear degradation is rated at 0.40%, yielding >87.4% of nameplate power after 30 years. - **Module efficiency up to 23.1%** - The top variant reaches 23.1% efficiency — on par with JA Solar JAM60S40 LR (23.0%) and Sunlike SKT510 (22.93%), and 1.9 percentage points above Trina Solar Vertex BSM (21.2%). This translates to higher energy yield per m² of roof area in space-constrained installations. - **30-year linear power warranty** - Jolywood guarantees >87.4% of initial power output after a full 30 years of operation. Many competing models in this power class offer a standard 25-year linear warranty, making this series more favorable in long-term LCOE calculations. - **Low temperature coefficient Pmax (−0.28%/°C)** - At −0.28%/°C, power losses on hot days are lower than typical P-type PERC modules rated at −0.34% to −0.35%/°C. At a peak module temperature of ~65°C, this translates to approximately 1.4 percentage points more retained power compared to PERC technology. - **BNEF Tier-1 manufacturer – bankability** - Jolywood (est. 2008) appears on the BloombergNEF bankable manufacturer list, confirming participation in at least six projects exceeding 10 MW financed by independent commercial banks. This facilitates third-party financing for utility-scale and commercial PV projects. ## Cons - **Monofacial – no bifacial yield gain** - The Light Series (is\_bifacial: false) does not harvest light reflected from the ground. In ground-mount and flat-roof installations with light-colored surfaces, bifacial modules generate 5–15% additional energy. The direct peer comparable, JA Solar JAM60S40 LR, offers bifacial construction in the same 485–510 Wp power class. - **12-year product warranty vs. 15 years at JA Solar** - JA Solar JAM60S40 LR — a direct competitor with an identical power range (485–510 Wp) and similar efficiency (23.0%) — carries a 15-year product warranty. Jolywood's 12-year coverage is 3 years shorter, reducing the factory-defect protection window for system owners. ## About this series The Jolywood JW-HT120N-R3 Light Series was designed to deliver high power density while maintaining practical mounting dimensions - these modules are based on **N-type TOPCon cells**, which maintain efficiency over the long term and offer stable performance under varying weather conditions. The Light version emphasizes versatility: the half-cut cell configuration improves tolerance to partial shading, and the **bifacial** design harnesses reflected light from the ground, boosting energy yield without requiring installation upgrades. The use of tempered glass and robust construction supports **resistance to loads and environmental conditions**, making them ideal for windy and snowy rooftops, as well as ground-mounted systems. This is an excellent choice for investors seeking to combine **high energy yield in low-light conditions** with reliable year-round performance - suitable for homes and businesses, as well as PV farms, carports, and public facilities. ## Notable figures - Efficiency of 21.9% is 0.6pp below the \*\*TOPCon 450-500W\*\* median (22.5%) - 219.3 W/m² power density is 5.9 W/m² below \*\*TOPCon 450-500W\*\* median (225.2 W/m²) - requires larger installation area - Temperature coefficient of -0.28%/°C matches the \*\*TOPCon 450-500W\*\* median - #6783 for efficiency, #1309 for temperature performance out of 14005 panels ## Questions ### What warranty does the Jolywood JW-HT120N-R3 Light Series come with? Jolywood provides a 12-year product warranty covering defects and workmanship, along with a 30-year linear power output warranty - one of the longer guarantees available for N-type modules. Over those 30 years, the panel retains a specified minimum percentage of its rated output following the degradation schedule. For residential and commercial projects, this is a key factor when calculating return on investment. ### What is TOPCon technology and why does the JW-HT120N-R3 series use it? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell architecture with a passivating contact layer that minimizes carrier recombination. In practice, it delivers a lower temperature coefficient (approx. -0.28%/°C) and better low-light efficiency than conventional PERC cells. The JW-HT120N-R3 series leverages TOPCon to maintain stable energy yield year-round - especially relevant in climates with frequent overcast conditions. ### Are the Jolywood JW-HT120N-R3 panels suitable for a roof partially shaded by a chimney or dormer? Yes. The half-cut cell layout (120 cells split into two independent electrical strings) limits power loss under partial shading. Shading one half of the panel does not shut down the entire module - the unshaded string continues to deliver current to the inverter. The Light Series is therefore a solid choice for rooftops with typical architectural obstructions. ### How many Jolywood JW-HT120N-R3 panels do I need for a 10 kW system? The top variant in this series is rated at 510 Wp. A 10 kW system requires approximately 20 panels (10,000 ÷ 510 ≈ 19.6, rounded up to 20 units). If you select a lower-wattage variant from the 485-510 Wp range, you may need 21 modules. The exact count depends on the system design and inverter MPPT configuration. ### Is Jolywood a reliable manufacturer - is the JW-HT120N-R3 worth buying? Jolywood holds Tier 1 status according to Bloomberg NEF, confirming financial bankability and consistent manufacturing standards. The China-based company specializes in N-type TOPCon technology and supplies cells to several European module brands. The JW-HT120N-R3 series is actively sold and backed by full manufacturer warranties. ### What types of installations are the Jolywood JW-HT120N-R3 Light Series panels best suited for? The Light Series is designed as a versatile module for a wide range of applications: pitched residential roofs, commercial and industrial rooftops, utility-scale PV farms, carports, and public-sector buildings. With up to 510 Wp per panel, it maximizes energy density on limited roof space, while the tempered glass construction and robust frame provide reliable resistance to snow and wind loads. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/938eeca787249f4c-b5c6c7779692.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +25 W, cooler, +3.1 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.9 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +20 W, cooler, +2.8 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +2.6 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +15 W, cooler, +2.6 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, lighter, +2.6 pp | | [Jolywood JW-HT120N-R3-490](https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-ht120n-r3-490) | 490 W | +0.3 pp | | [Jolywood JW-HD120N-R3-495](https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-hd120n-r3-495) | 495 W | +10 W, heavier, +0.5 pp | | [Jolywood JW-HD108N-R2-500](https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-hd108n-r2-500) | 500 W | +15 W, heavier, +0.6 pp | | [Jolywood JW-HD120N-R3-500](https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-hd120n-r3-500) | 500 W | +15 W, heavier, +0.7 pp | | [Jolywood JW-HD108N-R2-505](https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-hd108n-r2-505) | 505 W | +20 W, heavier, +0.8 pp | | [Jolywood JW-HT120N-R3-505](https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-ht120n-r3-505) | 505 W | +20 W, +0.9 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +75 W, cooler, +2.9 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +70 W, cooler, +2.7 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +65 W, lighter, +2.5 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +55 W, cooler, +2.5 pp | --- Source: https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-ht120n-r3-485 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.