--- title: "REC REC390TP5 Black Solar Panel: Specs & Datasheet | ComparePV" description: "REC REC390TP5 Black solar panel. Specs: 19.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/rec-rec390tp5-black" image: "https://comparepv.com/og/panel/rec-rec390tp5-black.png" updated: 2026-09-11 --- # REC REC390TP5 Black Middle of its segment, needs the roof space 6,261 panels in the 290-490 W band, all technologies ## Identity - **Manufacturer:** REC - **Model:** REC390TP5 Black - **Series:** REC TwinPeak 5 Black Series - **Rated power:** 390 W - **Cell technology:** Monocrystalline ## How it compares Compared against 290-490 W band, all technologies (6261 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 390 W | 430 W | Weak - bottom 20% | | | Module efficiency | 19.80% | 21.25% | Weak - bottom 18% | 12,501 | | Power density | 197.5 | 212.5 | Weak - bottom 17% | 12,555 | | Temperature coefficient | -0.340 | -0.300 | Typical | 8,846 | | Weight (kg) | 21.6 kg | 22.3 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,912 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.80% | 21.25% | Weak - bottom 18% | 12,501 | | Power density | 197.5 | 212.5 | Weak - bottom 17% | 12,555 | | Temperature coefficient | -0.340 | -0.300 | Typical | 8,846 | | Weight per kWp | 55.4 | 53.3 | Typical | 9,899 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,912 | ### Watch out for - **197.5 watts per square metre** - Bottom 17% of the 290-490 W band, against a median of 212.5. - **19.80% module efficiency** - Bottom 18% of the 290-490 W band, against a median of 21.25%. - **25 year performance warranty** - Bottom 19% of the 290-490 W band, against a median of 30 yrs. - **Best for:** Residential and shaded-installations. - **Not ideal for:** Roofs where every square metre has to count, tight roof space and owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 390 W - **Efficiency:** 19.80 % - **Voltage at Pmax (Vmp):** 36.80 V - **Current at Pmax (Imp):** 10.60 A - **Open-circuit voltage (Voc):** 44.80 V - **Short-circuit current (Isc):** 11.31 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell count:** 132 ### Physical - **Length:** 1899 mm - **Width:** 1040 mm - **Thickness:** 30 mm - **Weight:** 21.6 kg - **Area:** 1.97 m2 - **Power density:** 197.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 20 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 86.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.50 % - **Output after 30 years:** 326 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12501 of 14129 | | Power density | 12555 of 14129 | | Temperature coefficient | 8846 of 14129 | | Weight | 9899 of 14129 | | Warranty | 9912 of 14129 | ## Pros - **Twin Design reduces shading losses** - Splitting the module into two independent sections with 132 half-cut cells means partial shading of one half does not disable the entire panel, limiting power drops typical of dense urban rooftops. - **Extendable warranty up to 25 years (ProTrust)** - The standard product warranty is 20 years, but through the REC ProTrust program it can be extended to 25 years for product, performance, and labor combined - a coverage level rarely matched even among tier-1 manufacturers. - **Low power degradation - 86% at year 25** - A guaranteed annual degradation rate of 0.5% means the panel retains at least 86% of nameplate power in its 25th year of operation, outperforming the typical 80.2-84.8% offered by competing PERC-based products. - **Reinforced frame for snow and wind loads** - Additional cross-bracing in the frame structure increases mechanical strength, which matters for installations in regions with heavy snow loads or high wind exposure. - **Tier-1 manufacturer with 30 years of track record** - REC has operated since 1996 and is classified as a tier-1 bankable manufacturer, which eases project financing and increases confidence in long-term warranty servicing. ## Cons - **Efficiency below peer comparables at equal power** - At the maximum 405 Wp rating, REC TwinPeak 5 Black Series efficiency tops out at 20.6%, while competing 405 Wp modules - EGing STAR SERIES and VSUN405-108BMH-DG - reach 20.74%, and Goldi Solar GS10-M108-BF reaches 20.66%. This means a slightly larger roof area is needed for the same installed capacity. - **No bifacial variant available** - The series is monofacial only (is\_bifacial: false), while comparable competitor Goldi Solar GS10-M108-BF offers a bifacial (BF) variant at the same 405 Wp rating, providing additional energy yield from reflected light on light-colored surfaces. ## About this series REC TwinPeak 5 Black Series are advanced photovoltaic modules that redefine performance standards on residential rooftops. Thanks to the use of innovative **Twin Design construction**, these panels offer exceptional efficiency even in challenging lighting conditions. The unique division of the module into two independent parts ensures that partial shading of one section does not paralyze the operation of the entire panel, effectively solving the problem of power drops in dense urban areas. This series stands out with its **elegant Full Black design**, which blends perfectly with modern architecture by eliminating visible silver structural elements. REC engineers have utilized a **reinforced frame structure** with additional cross-supports, guaranteeing the highest resistance to extreme snow and wind loads. What sets them apart from the competition is **Multi-Busbar technology**, which optimizes current flow and minimizes energy losses while increasing cell longevity. This solution is dedicated to prosumers whose priority is a **low risk of micro-cracks** and maximizing yields from limited roof space. By choosing this series, investors receive a premium product combining sophisticated aesthetics with uncompromising technical reliability for years. ## Notable figures - Efficiency of 19.8% is 2.0pp below the \*\*database\*\* median (21.8%) - Power density of 197.5 W/m² is 20.6 W/m² below \*\*database\*\* median (218.1 W/m²) - needs more roof space - At -0.34%/°C, loses 0.04pp more power per degree than \*\*database\*\* median (-0.30%/°C) - Weight of 21.6 kg (4.9 kg below \*\*database\*\* median of 26.5 kg) allows easier transport and roof mounting - Ranked #12501 out of 14129 panels for efficiency in the database ## Questions ### How does Twin Design technology in the REC TwinPeak 5 Black panels help with partial shading? Twin Design splits the module into two independent electrical sections connected in parallel. If a chimney or dormer shades one half, the other keeps producing at full power, avoiding the weakest-link effect that cripples conventional modules. Combined with 132 half-cut cells, this significantly reduces energy losses in real-world urban rooftop conditions. ### What warranties does the REC TwinPeak 5 Black Series come with? REC provides a 20-year product warranty and a 25-year performance warranty. After 25 years, the module must retain at least 86% of its rated power. Degradation is capped at 2% in year one and 0.5% per year thereafter, which is better than the typical industry standard for most competing PERC modules. ### How is the REC TwinPeak 5 Black visually different from the standard version, and does it affect installation cost? The Black version features a black frame, black backsheet, and black cells with no visible silver elements. On a dark roof it is nearly invisible, which architects and premium residential clients value. Installation cost is comparable to the standard variant; the only meaningful difference is a slightly higher module price for the all-black aesthetic. ### What is the temperature coefficient of the REC TwinPeak 5 Black and how much power does it lose in summer heat? The temperature coefficient of Pmax is -0.34%/°C. At a cell temperature of 45°C, typical for Central European summers, the module produces approximately 93% of its rated power. This outperforms many competing PERC panels rated at -0.38 to -0.40%/°C, resulting in measurably lower summer power losses under identical irradiance conditions. ### What snow and wind loads can the REC TwinPeak 5 Black Series withstand? The reinforced 30 mm frame with extra cross-support bars is rated for loads up to 7,000 Pa. This significantly exceeds the requirements for Central European climatic zones under EN 1991, where pitched roofs are typically rated at 2,400-4,000 Pa, making the panel well-suited for regions with heavy snowfall and high wind exposure. ### Does the Multi-Busbar technology in the REC TwinPeak 5 Black Series actually improve long-term module reliability? Yes. Multi-Busbar distributes current across more, thinner conductors than conventional 3-4 busbar designs. The reduced mechanical stress at each solder joint significantly lowers the risk of micro-cracks in the cells, which are the leading cause of long-term panel degradation. The result is lower power loss and better real-world performance over a 25-year lifespan. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/REC-TwinPeak-5-Black-Series-Rev-A-5dea0a876dec.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, cooler, +3.3 pp | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | -50 W, lighter, +3.2 pp | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +3.2 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, +3.2 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, +3.2 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, +3.2 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, +3.2 pp, +5 yr warranty | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +50 W, cooler, +3.1 pp | | [REC REC395TP5 Black](https://comparepv.com/panel/rec-rec395tp5-black) | 395 W | +0.3 pp | | [REC REC400NP3 Black](https://comparepv.com/panel/rec-rec400np3-black) | 400 W | +10 W, +0.5 pp | | [REC REC405TP5 Black](https://comparepv.com/panel/rec-rec405tp5-black) | 405 W | +15 W, +0.8 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +120 W, cooler, +5.2 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +170 W, cooler, +5.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +115 W, cooler, +4.9 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +115 W, cooler, +4.9 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +165 W, cooler, +4.8 pp | --- Source: https://comparepv.com/panel/rec-rec390tp5-black Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.