--- title: "Jolywood JW-HD144N-R0-595 595W Solar Panel - Specs & Review | ComparePV" description: "Jolywood JW-HD144N-R0-595 595W solar panel. Specs: 23.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-hd144n-r0-595" updated: 2026-09-11 --- # Jolywood JW-HD144N-R0-595 Space saver, no clear weak spot 259 panels in the segment N-type 550-600 W ## Identity - **Manufacturer:** Jolywood - **Model:** JW-HD144N-R0-595 - **Series:** JW Pro Series (n-Type Bifacial Dual-Glass Mono Module) - **Rated power:** 595 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 550-600 W (259 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 595 W | 580 W | Strong - top 4% | | | Module efficiency | 23.00% | 22.45% | Strong - top 9% | 1,919 | | Power density | 230.3 | 224.5 | Strong - top 6% | 1,758 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 9% | 1,309 | | Weight (kg) | 31.5 kg | 29.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.00% | 22.45% | Strong - top 9% | 1,919 | | Power density | 230.3 | 224.5 | Strong - top 6% | 1,758 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 9% | 1,309 | | Weight per kWp | 52.9 | 52.3 | Typical | 6,657 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **230.3 watts per square metre** - Top 6% of the N-type 550-600 W segment, against a median of 224.5. Ranked 1,758th in the whole database. - **-0.280 %/°C temperature coefficient** - Top 9% of the N-type 550-600 W segment, against a median of -0.290. Ranked 1,309th in the whole database. - **23.00% module efficiency** - Top 9% of the N-type 550-600 W segment, against a median of 22.45%. Ranked 1,919th in the whole database. - **Best for:** Commercial, utility-scale, hot-climate and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 595 W - **Efficiency:** 23.00 % - **Voltage at Pmax (Vmp):** 44.97 V - **Current at Pmax (Imp):** 13.23 A - **Open-circuit voltage (Voc):** 52.37 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:** N-type - **Cell count:** 144 - **Bifacial:** yes ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 31.5 kg - **Area:** 2.58 m2 - **Power density:** 230.3 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:** 520 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1919 of 14005 | | Power density | 1758 of 14005 | | Temperature coefficient | 1309 of 14005 | | Weight | 6657 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon – low degradation** - N-type TOPCon cells degrade at 0.4%/year (1.0% in year 1), guaranteeing ≥87.4% of rated power after 30 years. Standard PERC modules degrade at ~0.55%/year, translating to a real yield gap of 3–5% over a 30-year project horizon. The N-type architecture also eliminates LID and LETID effects inherent to P-type technologies. - **Dual-glass – environmental durability** - The glass-glass construction provides certified resistance to salt mist, ammonia, PID, sand, and high humidity — critical for coastal, agricultural, and industrial installations. Eliminating the rear backsheet removes the primary failure mode of delamination and moisture ingress seen in framed modules after 10–15 years of field operation. - **Bifacial design – albedo yield gain** - Bifacial operation delivers up to 30% additional rear-side power under favorable albedo conditions (white membrane, gravel, snow, light concrete). In typical ground-mount configurations, the bifacial gain ranges from 5–15%, directly improving LCOE without incremental BoS cost. - **Up to 23% efficiency – segment-competitive** - The top 595 Wp variant reaches 23.0% module efficiency — on par with peer comparables Solarspace Lumina II (23.03%) and Ulica Solar TOPCon 595W (23.03%), and materially above Sunova TS-BW78 (21.3%). Higher efficiency reduces module count for a given system size, lowering BoS costs, cabling runs, and roof loading. - **BNEF Tier-1 bankable since 2008** - Jolywood is confirmed on the BloombergNEF Tier-1 module manufacturer list (Q1 2026), signaling bankability for project finance. Operating since 2008 and recognized as a pioneer in commercial N-type cell manufacturing, Jolywood's R&D track record and production continuity reduce counterparty risk for long-term PPA and financed projects. ## Cons - **12-year product warranty only** - JW Pro carries a 12-year product warranty, falling short of the 15-year standard offered by multiple Tier-1 peers in the premium TOPCon segment — including JA Solar (Tiger Neo), Longi (Hi-MO X6), and Risen. The shorter coverage period shifts the risk of latent defects and manufacturing failures to the system owner earlier in the asset's lifecycle. - **Higher weight – rooftop load constraint** - 144-cell dual-glass modules typically weigh 33–36 kg, approximately 30–50% more than equivalent framed modules (22–26 kg). On existing rooftops with limited structural load capacity, this requires a structural audit and may generate additional reinforcement costs or necessitate a reduction in module count per roof section. ## About this series The Jolywood JW Pro series features panels built with **n-type TOPCon** technology, specifically engineered to genuinely boost energy yield in conditions where conventional modules quickly lose their edge. Central to this is the **bifacial dual-glass** construction - the double glass enhances sealing and environmental resilience, while the two-sided cell operation harnesses reflected light from the ground surface. As a result, the JW Pro performs exceptionally well on highly reflective surfaces such as light-colored roofs, membranes, gravel, and ground-mounted structures, where ground reflectivity plays a key role. In practice, users experience **lower degradation** and more stable long-term performance, which is crucial for calculations based on self-consumption, PPA, or project financial metrics. Additionally, the series excels in high temperatures and low-light conditions, translating to more predictable yields during seasonal transitions and hot periods. This series is tailored for investors who prioritize not just nominal power output, but higher energy returns, longevity, and reliability - especially in commercial, industrial, and utility-scale setups. ## Notable figures - At 23.0% efficiency, this panel is 0.6pp above typical \*\*N-type 550-600W\*\* modules (median: 22.4%) - 230.3 W/m² power density - 5.8 W/m² more than \*\*N-type 550-600W\*\* median (224.5 W/m²), more power per roof area - At -0.28%/°C, hot weather performance is typical for \*\*N-type 550-600W\*\* panels - At 31.5 kg (2.0 kg above \*\*N-type 550-600W\*\* median of 29.5 kg), requires checking roof load capacity - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### What is the temperature coefficient of the Jolywood JW Pro and does it lose significant power in summer heat? The JW Pro series features a temperature coefficient of Pmax of approximately -0.28 %/°C, placing it among the top performers in its power class. For every 10°C rise in cell temperature, the module loses only about 2.8% of rated output. By comparison, conventional p-type PERC cells typically reach -0.35 %/°C. In practice, this means noticeably higher yield on hot summer days when rooftop temperatures exceed 60–70°C. ### What warranty does the Jolywood JW Pro Series come with? Jolywood provides a 12-year product warranty and a 30-year linear power warranty. After 30 years of operation, the module is guaranteed to retain at least 87.4% of rated power. First-year degradation is capped at 1%, with subsequent annual degradation of no more than 0.4%. This is one of the most competitive degradation profiles currently available for commercial-grade PV modules. ### How much additional energy does the bifacial design of the Jolywood JW Pro actually deliver? Rear-side energy gain depends on ground albedo. On bright white gravel, a light-colored roofing membrane, or sandy soil, you can realistically expect 10–30% more yield per square meter compared to an equivalent monofacial module. On gray concrete or dark roofing tiles, the benefit is roughly 5–10%. The rated 595 W peak power is measured under STC from the front side only, so bifacial gain is real-world yield on top of that figure. ### How does n-type TOPCon technology in the Jolywood JW Pro differ from standard PERC modules? N-type TOPCon cells incorporate a tunnel oxide passivated contact layer that significantly reduces charge carrier recombination. This translates to higher module efficiency (up to 23%), lower first-year degradation (1% vs. approximately 2–3% for PERC), and inherent resistance to light-induced degradation (LID) and light and elevated temperature-induced degradation (LeTID). The result is more stable, predictable yield over the full 30-year warranty period — critical for PPA-based or LCOE-driven project financing. ### Are Jolywood JW Pro panels suitable for ground-mounted systems and utility-scale solar farms? Yes, the JW Pro series is engineered specifically for commercial, industrial, and utility-scale ground-mounted arrays. Its reinforced steel frame, made from a zinc-aluminum-magnesium alloy, is approximately 50% stronger than standard aluminum frames, providing reliable performance under high wind and snow loads. The bifacial dual-glass construction maximizes energy output on high-albedo ground surfaces such as gravel, sand, or concrete — common in large ground-mount installations. ### How heavy is the Jolywood JW Pro 595W panel, and can a standard roof structure support it? The JW-HD144N-R0 595W module weighs approximately 28 kg with dimensions of 2,278 × 1,134 × 29 mm. This is typical for dual-glass modules in this power class — lighter glass-backsheet modules rated 400–420 W generally weigh 20–22 kg. Before mounting on an existing roof, a structural engineer should verify the rafter system's load-bearing capacity, particularly when replacing an older array or a heavy roofing material. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/4ad01d15850fa614-329bef93dcec.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +50 W, lighter, +2.0 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -35 W, lighter, +1.8 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +45 W, lighter, +1.8 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -40 W, lighter, +1.6 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +40 W, lighter, +1.6 pp | | [Jolywood JW-HT144N-565](https://comparepv.com/panel/jolywood-jw-ht144n-565) | 565 W | -30 W, lighter, -1.1 pp | | [Jolywood JW-HD144N-R0-570W](https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-hd144n-r0-570w) | 570 W | -25 W, -0.9 pp | | [Jolywood JW-HD144N-R0-575W](https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-hd144n-r0-575w) | 575 W | -20 W, -0.7 pp | | [Jolywood JW-HD144N-R0-580W](https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-hd144n-r0-580w) | 580 W | -15 W, -0.5 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +55 W, lighter, +2.2 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +35 W, cooler, +1.4 pp | --- Source: https://comparepv.com/panel/jolywood-taizhou-solar-technology-co-ltd-jw-hd144n-r0-595 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.