--- title: "Resun Solar RS7I-440M 440W Solar Panel - Specs & Review | ComparePV" description: "Resun Solar RS7I-440M 440W solar panel. Specs: 19.91% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs7i-440m" updated: 2026-09-11 --- # Resun Solar RS7I-440M Middle of its segment, modest efficiency 7,136 panels in the 340-540 W band, all technologies ## Identity - **Manufacturer:** Resun Solar - **Model:** RS7I-440M - **Series:** RS7I-M - **Rated power:** 440 W - **Cell technology:** Monocrystalline ## How it compares Compared against 340-540 W band, all technologies (7136 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 440 W | 445 W | Typical | | | Module efficiency | 19.91% | 21.50% | Weak - bottom 12% | 12,328 | | Power density | 202.4 | 215.1 | Weak - bottom 17% | 11,857 | | Temperature coefficient | -0.340 | -0.300 | Typical | 8,778 | | Weight (kg) | 25.0 kg | 23.5 kg | Weak - bottom 20% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.91% | 21.50% | Weak - bottom 12% | 12,328 | | Power density | 202.4 | 215.1 | Weak - bottom 17% | 11,857 | | Temperature coefficient | -0.340 | -0.300 | Typical | 8,778 | | Weight per kWp | 56.8 | 52.7 | Weak - bottom 20% | 10,878 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **19.91% module efficiency** - Bottom 12% of the 340-540 W band, against a median of 21.50%. - **202.4 watts per square metre** - Bottom 17% of the 340-540 W band, against a median of 215.1. - **56.8 kg per kWp** - Bottom 20% of the 340-540 W band, against a median of 52.7. - **Best for:** Residential, commercial, shaded-installations and cold-climate. - **Not ideal for:** Tight roof space, roofs where every square metre has to count and weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 440 W - **Efficiency:** 19.91 % - **Voltage at Pmax (Vmp):** 41.10 V - **Current at Pmax (Imp):** 10.71 A - **Open-circuit voltage (Voc):** 48.90 V - **Short-circuit current (Isc):** 11.46 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.320 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell count:** 144 ### Physical - **Length:** 2094 mm - **Width:** 1038 mm - **Thickness:** 35 mm - **Weight:** 25.0 kg - **Area:** 2.17 m2 - **Power density:** 202.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Annual degradation:** 0.50 % - **Output after 30 years:** 372 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12328 of 14005 | | Power density | 11857 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 10878 of 14005 | | Warranty | 21 of 14005 | ## About this series The RS7I-M series from Resun Solar is built for investors who expect a photovoltaic installation to hold up reliably under demanding weather conditions typical of the Polish climate. The panels use monocrystalline silicon cells combined in a **half-cut** and **multi-busbar** layout, which reduces internal current losses and boosts efficiency compared to conventional designs. Splitting the cells into halves makes the module far less prone to power loss from partial shading, effectively **protecting against hot-spot formation** and extending the lifespan of the installation. The RS7I-M is engineered for **high resistance to snow and wind loads**, making it a solid choice for both pitched residential roofs and flat commercial buildings exposed to harsh weather. Tempered front glass adds further protection against mechanical damage, including hail impact. The series carries **PID-free certification**, eliminating the risk of potential-induced degradation and ensuring stable energy output throughout the system's operating life. The RS7I-M works well both for prosumer installations and larger commercial projects where price-to-reliability ratio and predictable energy yield under variable sunlight conditions matter most. ## Notable figures - At 19.9% efficiency, this panel is 1.9pp below the \*\*database\*\* median of 21.8% - At 202.4 W/m², this panel generates 15.7 W/m² less per unit area than \*\*database\*\* median (218.1 W/m²) - At -0.34%/°C, loses 0.04pp more power per degree than \*\*database\*\* median (-0.30%/°C) - Weight of 25.0 kg (1.5 kg below \*\*database\*\* median of 26.5 kg) allows easier transport and roof mounting - #12328 for efficiency, #8778 for temperature performance out of 14005 panels ## Questions ### Is the Resun Solar RS7I-M series still available for purchase? The RS7I-M series has been discontinued and is no longer manufactured as part of the current product lineup. Panels may still be available through distributors with remaining stock, but once inventory is depleted, identical modules will no longer be obtainable. Anyone looking to expand an existing installation should contact their supplier promptly to check current availability. ### What warranty comes with Resun Solar RS7I-M panels? The manufacturer backs the RS7I-M series with a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty. This means the panel is designed to retain a guaranteed percentage of its original output even after three decades of use, giving investors predictable long-term performance for ROI planning. ### How does half-cut cell technology in the RS7I-M differ from standard monocrystalline panels? In the RS7I-M, monocrystalline cells are cut in half and connected using a multi-busbar layout, reducing internal resistance and current losses compared to full-size cells. This design lowers the risk of hot-spot formation under partial shading and improves overall module efficiency without significantly changing the panel's external dimensions. ### Are RS7I-M panels suitable for roofs exposed to heavy snow loads? Yes, the RS7I-M was engineered for high resistance to snow and wind loads, making it a solid choice for the Polish climate. Its tempered front glass provides additional protection against mechanical damage, including hail impact, which matters for sloped roofs exposed to extreme weather conditions. ### What is the maximum power output of the RS7I-M, and what installations is it suited for? RS7I-M panels reach a maximum output of up to 460 Wp, making them a versatile choice for both residential prosumer installations and larger commercial projects. With a strong price-to-reliability ratio and PID-free certification, the series delivers stable, predictable energy yield even under variable sunlight conditions. ### What does PID-free certification mean for RS7I-M panels, and why does it matter? PID-free certification confirms that RS7I-M panels resist potential-induced degradation, a phenomenon that gradually reduces module output due to voltage differences within the system. This protection ensures stable energy production throughout the panel's lifespan, avoiding the sudden performance drops common in cheaper, non-certified modules. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS7I-M-HC-425-450W-min-63272ad3c4e9.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +50 W, cooler, +4.6 pp | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | +50 W, cooler, +4.6 pp | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | Cooler, lighter, +4.4 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +45 W, cooler, +4.4 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +45 W, cooler, +4.4 pp | | [Gokin GK-5-54HG-485M](https://comparepv.com/panel/gokin-gk-5-54hg-485m) | 485 W | +45 W, cooler, +4.4 pp | | [Heckert Solar ZEUS 3.0+ 108 485WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp) | 485 W | +45 W, cooler, +4.4 pp | | [Resun Solar RS7I-425M](https://comparepv.com/panel/resun-solar-rs7i-425m) | 425 W | -15 W, -0.7 pp | | [Resun Solar RS7I-430M](https://comparepv.com/panel/resun-solar-rs7i-430m) | 430 W | -10 W, -0.4 pp | | [Resun Solar RS7I-435M](https://comparepv.com/panel/resun-solar-rs7i-435m) | 435 W | -0.2 pp | | [Resun Solar RS7I-445M](https://comparepv.com/panel/resun-solar-rs7i-445m) | 445 W | +0.2 pp | | [Resun Solar RS7I-450M-BD](https://comparepv.com/panel/resun-solar-rs7i-450m-bd) | 450 W | +10 W, hotter, +0.8 pp | | [Resun Solar RS7I-455M](https://comparepv.com/panel/resun-solar-rs7i-455m) | 455 W | +15 W, +1.0 pp | | [Resun Solar RS7I-460M](https://comparepv.com/panel/resun-solar-rs7i-460m) | 460 W | +20 W, +1.2 pp | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +150 W, cooler, +3.9 pp | | [Gamko New Energy GKA120N-PRO-585W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-585w) | 585 W | +145 W, cooler, +3.7 pp | --- Source: https://comparepv.com/panel/resun-solar-rs7i-440m Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.