--- title: "Runtech China RT-350M 350W Solar Panel - Specs & Review | ComparePV" description: "Runtech China RT-350M 350W solar panel. Specs: 18.03% efficiency, Polycrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/runtech-china-rt-350m" updated: 2026-09-11 --- # Runtech China RT-350M Middle of its segment, weak in heat 4,542 panels in the 250-450 W band, all technologies ## Identity - **Manufacturer:** Runtech China - **Model:** RT-350M - **Series:** RT-340\|345\|350\|355P - **Rated power:** 350 W - **Cell technology:** Polycrystalline ## How it compares Compared against 250-450 W band, all technologies (4542 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 350 W | 410 W | Weak - bottom 16% | | | Module efficiency | 18.03% | 20.74% | Weak - bottom 11% | 13,224 | | Power density | 180.0 | 207.4 | Weak - bottom 12% | 13,212 | | Temperature coefficient | -0.410 | -0.340 | Weak - bottom 3% | 13,738 | | Weight (kg) | 22.4 kg | 21.5 kg | Weak - bottom 15% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 23% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 18.03% | 20.74% | Weak - bottom 11% | 13,224 | | Power density | 180.0 | 207.4 | Weak - bottom 12% | 13,212 | | Temperature coefficient | -0.410 | -0.340 | Weak - bottom 3% | 13,738 | | Weight per kWp | 64.0 | 54.4 | Weak - bottom 15% | 12,948 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 23% | 9,798 | ### Watch out for - **-0.410 %/°C temperature coefficient** - Bottom 3% of the 250-450 W band, against a median of -0.340. Ranked 13,738th in the whole database. - **18.03% module efficiency** - Bottom 11% of the 250-450 W band, against a median of 20.74%. - **180.0 watts per square metre** - Bottom 12% of the 250-450 W band, against a median of 207.4. - **Best for:** Residential and commercial. - **Not ideal for:** Hot climates, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 350 W - **Efficiency:** 18.03 % - **Voltage at Pmax (Vmp):** 38.10 V - **Current at Pmax (Imp):** 9.21 A - **Open-circuit voltage (Voc):** 46.20 V - **Short-circuit current (Isc):** 9.79 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.410 %/degC - **Temperature coefficient of Voc:** -0.310 %/degC - **Temperature coefficient of Isc:** 0.053 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Polycrystalline - **Cell count:** 144 ### Physical - **Length:** 1960 mm - **Width:** 992 mm - **Thickness:** 35 mm - **Weight:** 22.4 kg - **Area:** 1.94 m2 - **Power density:** 180.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 10 years - **Performance warranty:** 25 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 13224 of 14005 | | Power density | 13212 of 14005 | | Temperature coefficient | 13738 of 14005 | | Weight | 12948 of 14005 | | Warranty | 9798 of 14005 | ## About this series The Runtech China RT-340\|345\|350\|355P series is designed for stable energy production under real operating conditions, even when solar irradiance is weaker or variable. The modules utilize **polycrystalline** solar cells in a high-section configuration, which helps minimize losses and improve predictability in typical roof and ground-mounted installations. In practice, they stand out due to their refined design: **IP67-rated junction box** provides protection against moisture and harsh weather, while **tempered glass** and a robust frame make installation and daily operation easy. Another key advantage of this series is its **high mechanical resistance** to snow and wind loads, which is important in the Polish climate. It is a good choice for investors who want to build a reliable and easy-to-maintain system, from single-family homes to larger systems on commercial buildings and in commercial projects. ## Notable figures - Efficiency of 18.0% is 3.8pp below the \*\*database\*\* median (21.8%) - Power density of 180.0 W/m² is 38.1 W/m² below \*\*database\*\* median (218.1 W/m²) - needs more roof space - Temperature coefficient of -0.41%/°C is 0.11pp worse than \*\*database\*\* median (-0.30%/°C) - higher losses in summer heat - At 22.4 kg, this panel is 4.1 kg lighter than \*\*database\*\* median (26.5 kg) - easier handling during installation - Ranked #13224 out of 14005 panels for efficiency in the database ## Questions ### Is the Runtech RT-340\|345\|350\|355P series still available for purchase? The RT-340\|345\|350\|355P series has been discontinued and is no longer actively offered by the manufacturer. If you need similar specifications — output in the 340–355 Wp range with polycrystalline cell technology — it is worth asking your distributor about available alternatives or newer modules from the same manufacturer. ### What warranty does the Runtech RT-355P solar panel carry? The manufacturer provides a 10-year product warranty covering material and workmanship defects, along with a 25-year linear power output warranty. This means the panel is guaranteed to maintain a specified minimum power level relative to its nominal rating over 25 years — a standard warranty scope for this class of polycrystalline modules. ### Can the RT-340\|345\|350\|355P panels handle heavy snow loads and wind typical of Polish winters? Yes, the series features enhanced mechanical resistance to snow and wind loads, making it well suited for the Polish climate. Tempered glass and a robust aluminum frame protect the module against deflection under snow accumulation. Exact allowable static load values (typically 5400 Pa snow / 2400 Pa wind) should be confirmed in the current datasheet. ### Are the RT-350P modules suitable for a pitched roof on a single-family home? Yes, the RT-340\|345\|350\|355P series is designed for both rooftop and ground-mounted installations. The IP67-rated junction box provides moisture resistance appropriate for rooftop exposure. The modules perform well on pitched roofs at a standard tilt of 30–40°, though final sizing requires a structural engineering assessment of roof loads and racking compatibility. ### How do Runtech RT-355P panels perform under cloudy skies or low irradiance? The RT-340\|345\|350\|355P series is optimized for stable energy production under variable irradiance conditions — common in the Polish climate. The multi-section polycrystalline cell layout helps reduce losses under partial shading and diffuse light. These are not bifacial modules, so they do not capture reflected irradiance from the ground surface. ### Are the polycrystalline cells in the RT-355P an outdated technology? Polycrystalline (poly) cells are a mature, proven technology with slightly lower efficiency than newer monocrystalline PERC or TOPCon modules, but also lower manufacturing costs. For ground-mounted systems or large rooftops where space is not a constraint, the efficiency difference rarely becomes a deciding factor. The RT-355P series is a solid choice for conventional prosumer installations, though newer mono modules deliver better yield per square meter. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RT-340-355WP-b4c636e4a1dc.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [SunLink LNSK-340M](https://comparepv.com/panel/sunlink-lnsk-340m) | 340 W | Cooler, lighter, +2.0 pp | | [Canadian Solar CS3K-330P](https://comparepv.com/panel/canadian-solar-cs3k-330p) | 330 W | Cooler, lighter, +1.9 pp | | [Canadian Solar CS3K-335MB-AG](https://comparepv.com/panel/canadian-solar-cs3k-335mb-ag) | 335 W | Cooler, +1.9 pp, +5 yr warranty | | [Canadian Solar CS3U-395P](https://comparepv.com/panel/canadian-solar-cs3u-395p) | 395 W | +45 W, cooler, +1.9 pp | | [SunLink LNSU-400M](https://comparepv.com/panel/sunlink-lnsu-400m) | 400 W | +50 W, cooler, +1.8 pp | | [SunLink LNSK-335M](https://comparepv.com/panel/sunlink-lnsk-335m) | 335 W | -15 W, cooler, +1.8 pp | | [Sunlike Solar LNSF-400M](https://comparepv.com/panel/sunlike-solar-lnsf-400m) | 400 W | +50 W, cooler, +1.7 pp | | [Canadian Solar CS3L-365P](https://comparepv.com/panel/canadian-solar-cs3l-365p) | 365 W | +15 W, cooler, +1.7 pp | | [Runtech China RT-340M](https://comparepv.com/panel/runtech-china-rt-340m) | 340 W | -10 W, -0.5 pp | | [Runtech China RT-345M](https://comparepv.com/panel/runtech-china-rt-345m) | 345 W | -0.3 pp | | [Runtech China RT-355M](https://comparepv.com/panel/runtech-china-rt-355m) | 355 W | +0.5 pp | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | Cooler, +6.0 pp, +15 yr warranty | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | Cooler, +5.7 pp, +15 yr warranty | | [Maxeon SPR-MAX7-465](https://comparepv.com/panel/maxeon-spr-max7-465) | 465 W | Cooler, +5.5 pp, +15 yr warranty | | [Maxeon SPR-MAX6-440](https://comparepv.com/panel/maxeon-spr-max6-440) | 440 W | Cooler, +4.8 pp, +15 yr warranty | | [Maxeon SPR-MAX6-435](https://comparepv.com/panel/maxeon-spr-max6-435) | 435 W | Cooler, +4.5 pp, +15 yr warranty | --- Source: https://comparepv.com/panel/runtech-china-rt-350m Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.