--- title: "Renewsys DESERV Extreme 108X-440 440W Solar Panel - Specs & Review | ComparePV" description: "Renewsys DESERV Extreme 108X-440 440W solar panel. Specs: 22.46% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/renewsys-deserv-extreme-108x-440" updated: 2026-09-11 --- # Renewsys DESERV Extreme 108X-440 Space saver, no clear weak spot 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Renewsys - **Model:** DESERV Extreme 108X-440 - **Series:** DESERV Extreme 108X (TOPCon Series, M10R Bifacial Dual Glass) - **Rated power:** 440 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 440 W | 435 W | Typical | | | Module efficiency | 22.46% | 22.00% | Strong - top 11% | 4,615 | | Power density | 224.6 | 220.2 | Strong - top 10% | 4,541 | | Temperature coefficient | -0.292 | -0.290 | Typical | 6,056 | | Weight (kg) | 24.0 kg | 22.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.46% | 22.00% | Strong - top 11% | 4,615 | | Power density | 224.6 | 220.2 | Strong - top 10% | 4,541 | | Temperature coefficient | -0.292 | -0.290 | Typical | 6,056 | | Weight per kWp | 54.5 | 51.4 | Typical | 8,872 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **224.6 watts per square metre** - Top 10% of the TOPCon 400-450 W segment, against a median of 220.2. - **22.46% module efficiency** - Top 11% of the TOPCon 400-450 W segment, against a median of 22.00%. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 440 W - **Efficiency:** 22.46 % - **Voltage at Pmax (Vmp):** 31.95 V - **Current at Pmax (Imp):** 13.79 A - **Open-circuit voltage (Voc):** 38.87 V - **Short-circuit current (Isc):** 14.46 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.292 %/degC - **Temperature coefficient of Voc:** -0.276 %/degC - **Temperature coefficient of Isc:** 0.057 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1729 mm - **Width:** 1133 mm - **Thickness:** 35 mm - **Weight:** 24.0 kg - **Area:** 1.96 m2 - **Power density:** 224.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4615 of 14005 | | Power density | 4541 of 14005 | | Temperature coefficient | 6056 of 14005 | | Weight | 8872 of 14005 | | Warranty | 21 of 14005 | ## Pros - **TOPCon M10R half-cut cells** - The use of monocrystalline M10R half-cut cells with N-type TOPCon technology delivers lower power losses under partial shading and better high-temperature performance compared to older PERC technology, translating into higher real-world energy yield in rooftop installations. - **Bifacial dual-glass design** - The dual-glass bifacial construction captures additional energy from ground-reflected irradiance, increasing total system yield without expanding the installation footprint - a key advantage for space-constrained rooftop projects. - **30-year linear power warranty** - The manufacturer backs the series with a 30-year linear power output warranty, a benchmark standard for the premium tier-1 segment, giving investors predictable long-term returns on their investment. - **Tier-1 bankable manufacturer with 13-year track record** - RenewSys has operated since 2011 and holds tier-1 bankable status, easing project financing through banks and leasing institutions and reducing risk for smaller commercial investors. - **Robust IP68 junction box and anodized frame** - The IP68-rated junction box with three bypass diodes and an anodized aluminum frame provide resistance to hail and strong wind loads, important for rooftop installations exposed to harsh weather conditions. ## Cons - **12-year product warranty below market trend** - The 12-year product warranty is shorter than many tier-1 competitors in series launched after 2023, which increasingly offer 20-25 years of product warranty alongside a 30-year power warranty - this may affect perceived long-term service value of the module. - **Efficiency slightly trails segment leaders in M10R 108D class** - The maximum efficiency of 22.97% is marginally lower than comparable SunKean and Sunket New Energy models (SKT430~450M10-108D5) reaching 23.04% at the same 450 Wp max power - a small but measurable gap when selecting a module for highest power density. ## About this series The DESERV Extreme 108X series is RenewSys's answer for rooftop installations and smaller commercial projects, where a compact module format matters just as much as high energy performance. The panels use **half-cut monocrystalline M10R cells built on TOPCon technology**, which reduces power losses under partial shading and improves performance at higher operating temperatures. The **bifacial dual-glass construction** allows the module to harvest additional energy from light reflected off the ground, boosting the overall yield of the installation without increasing its footprint. This makes the series a strong fit for projects where maximizing output from limited mounting space is a priority. The module features an **IP68-rated junction box with three bypass diodes** and an anodized aluminum frame, ensuring durability in demanding weather conditions, including resistance to hail and high wind loads. RenewSys backs the series with a **12-year product warranty and a 30-year power output warranty**, making it an appealing choice for investors looking for a predictable long-term return. It's a solution aimed at both residential prosumer installers and contractors working on smaller commercial systems who value compact dimensions paired with modern cell technology. ## Notable figures - Efficiency of 22.5% matches the \*\*TOPCon 400-450W\*\* median - At 224.6 W/m² power density, this panel generates 4.4 W/m² more per unit area than \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 400-450W\*\* panels - Weight of 24.0 kg is 2.0 kg above \*\*TOPCon 400-450W\*\* median (22.0 kg) - verify structural support - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### What is the maximum power output of the RenewSys DESERV Extreme 108X panels? The DESERV Extreme 108X series reaches a maximum power output of up to 450 Wp. Thanks to monocrystalline M10R half-cut cells built on TOPCon technology combined with a bifacial design, the module delivers high power density in a relatively compact format, which matters when roof space is limited. ### How does the TOPCon cell technology in the DESERV Extreme 108X differ from classic PERC cells? The TOPCon cells in this series use an additional passivation layer, giving the module higher efficiency and lower power losses at high temperatures compared to traditional PERC panels. In practice, this means better energy yield during summer and slower power degradation over the long-term lifespan of the installation. ### Do the bifacial DESERV Extreme 108X panels require special mounting to benefit from the dual-sided design? To capture the additional energy gain from the rear side of the module, it's best to mount the panels on racking that raises them above the ground and over bright, reflective surfaces such as white gravel or high-albedo roofing. Standard pitched-roof mounting still works, but the bifacial gain will be more limited. ### What warranty applies to the RenewSys DESERV Extreme 108X modules? The manufacturer provides a 12-year product warranty along with a 30-year power output warranty. These are among the longer coverage periods on the market, offering greater investment security and a more predictable return on the installation over the long term. ### Is the DESERV Extreme 108X suitable for smaller pitched-roof installations? Yes, the series was designed mainly for residential rooftop and smaller commercial projects. Its compact module format combined with high energy yield allows efficient use of limited roof space, making it a solid choice for installers working on prosumer-scale systems. ### Is the junction box on the DESERV Extreme 108X resistant to moisture and harsh weather conditions? Yes, the module features an IP68-rated junction box with three bypass diodes, providing strong resistance to moisture, dust, and contamination. Combined with an anodized aluminum frame, the panel is built to withstand harsh conditions, including strong wind and hail. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/37b508_7420ad65fb9a4921a228fbee8a54776c-96957cf6709a.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +50 W, cooler, +2.0 pp | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | +50 W, cooler, +2.0 pp | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +45 W, lighter, +1.8 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +45 W, cooler, +1.8 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +45 W, cooler, +1.8 pp | | [Gokin GK-5-54HG-485M](https://comparepv.com/panel/gokin-gk-5-54hg-485m) | 485 W | +45 W, cooler, +1.8 pp | | [Heckert Solar ZEUS 3.0+ 108 485WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp) | 485 W | +45 W, cooler, +1.8 pp | | [Renewsys DESERV Extreme 108X-415](https://comparepv.com/panel/renewsys-deserv-extreme-108x-415) | 415 W | -25 W, -1.3 pp | | [Renewsys DESERV Extreme 108X-420](https://comparepv.com/panel/renewsys-deserv-extreme-108x-420) | 420 W | -20 W, -1.0 pp | | [Renewsys DESERV Extreme 108X-425](https://comparepv.com/panel/renewsys-deserv-extreme-108x-425) | 425 W | -15 W, -0.8 pp | | [Renewsys DESERV Extreme 108X-430](https://comparepv.com/panel/renewsys-deserv-extreme-108x-430) | 430 W | -10 W, -0.5 pp | | [Renewsys DESERV Extreme 108X-435](https://comparepv.com/panel/renewsys-deserv-extreme-108x-435) | 435 W | -0.2 pp | | [Renewsys DESERV Extreme 108X-445](https://comparepv.com/panel/renewsys-deserv-extreme-108x-445) | 445 W | +0.3 pp | | [Renewsys DESERV Extreme 108X-450](https://comparepv.com/panel/renewsys-deserv-extreme-108x-450) | 450 W | +10 W, +0.5 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +70 W, cooler, +2.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +55 W, cooler, +2.3 pp | --- Source: https://comparepv.com/panel/renewsys-deserv-extreme-108x-440 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.