--- title: "Sunova RS645~665S9B-132 (660W) 660W Solar Panel - Specs & Review | ComparePV" description: "Sunova RS645~665S9B-132 (660W) 660W solar panel. Specs: 21.20% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/thornova-rs645-665s9b-132-660w" updated: 2026-09-11 --- # Sunova RS645~665S9B-132 (660W) Light for its output, weak in heat 5,083 panels in the 560-760 W band, all technologies ## Identity - **Manufacturer:** Sunova - **Model:** RS645~665S9B-132 (660W) - **Series:** Tarzan Series - **Rated power:** 660 W - **Cell technology:** Monocrystalline ## How it compares Compared against 560-760 W band, all technologies (5083 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 660 W | 620 W | Strong - top 25% | | | Module efficiency | 21.20% | 22.54% | Weak - bottom 10% | 9,076 | | Power density | 212.5 | 225.4 | Weak - bottom 11% | 8,959 | | Temperature coefficient | -0.354 | -0.290 | Weak - bottom 2% | 12,285 | | Weight (kg) | 33.0 kg | 32.7 kg | Strong - top 23% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 7% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.20% | 22.54% | Weak - bottom 10% | 9,076 | | Power density | 212.5 | 225.4 | Weak - bottom 11% | 8,959 | | Temperature coefficient | -0.354 | -0.290 | Weak - bottom 2% | 12,285 | | Weight per kWp | 50.0 | 53.1 | Strong - top 23% | 3,317 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 7% | 9,798 | ### Strengths - **50.0 kg per kWp** - Top 23% of the 560-760 W band, against a median of 53.1. ### Watch out for - **-0.354 %/°C temperature coefficient** - Bottom 2% of the 560-760 W band, against a median of -0.290. Ranked 12,285th in the whole database. - **25 year performance warranty** - Bottom 7% of the 560-760 W band, against a median of 30 yrs. Ranked 9,798th in the whole database. - **21.20% module efficiency** - Bottom 10% of the 560-760 W band, against a median of 22.54%. Ranked 9,076th in the whole database. - **Best for:** Residential, commercial, utility-scale and shaded-installations. - **Not ideal for:** Hot climates, owners who want a long output guarantee and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 660 W - **Efficiency:** 21.20 % - **Voltage at Pmax (Vmp):** 38.08 V - **Current at Pmax (Imp):** 17.33 A - **Open-circuit voltage (Voc):** 46.03 V - **Short-circuit current (Isc):** 18.73 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.354 %/degC - **Temperature coefficient of Voc:** -0.266 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell count:** 132 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 33.0 kg - **Area:** 3.11 m2 - **Power density:** 212.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 85.0 % - **Output after 30 years:** 542 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9076 of 14005 | | Power density | 8959 of 14005 | | Temperature coefficient | 12285 of 14005 | | Weight | 3317 of 14005 | | Warranty | 9798 of 14005 | ## About this series The Sunova Tarzan Series has been designed to maximize energy yield in situations where every square meter and stable performance over the years are crucial. A key feature is the use of modern cell architecture, with a focus on high efficiency under real-world conditions - even in less sunny situations or on hot days when standard modules often lose efficiency. This translates to more energy from the same roof area or ground-mounted structure. Several features enhance reliability in this series: **half-cut cell design** which reduces losses and improves performance under partial shading, **multi-busbar technology** which supports better current collection and resistance to micro-cracks, and in certain configurations, **dual-sided bifacial construction** which can recover additional energy from reflected light. For installations exposed to moisture or high voltage in the string, **increased PID resistance** is also important. The Tarzan Series is a good choice for residential, commercial, and solar farm applications, especially when long-term yields and lower degradation risk compared to many typical P-type modules are a priority. ## Notable figures - Efficiency of 21.2% is 0.6pp below the \*\*database\*\* median (21.8%) - 212.5 W/m² power density is 5.6 W/m² below \*\*database\*\* median (218.1 W/m²) - requires larger installation area - -0.35%/°C temperature coefficient - 0.05pp worse than \*\*database\*\* median (-0.30%/°C), expect higher hot weather losses - At 33.0 kg (6.5 kg above \*\*database\*\* median of 26.5 kg), requires checking roof load capacity - #9076 for efficiency, #12285 for temperature performance out of 14005 panels ## Questions ### How much energy can you get from the Sunova Tarzan Series panel with 665 Wp power? The Tarzan Series panel with a maximum power of 665 Wp is a high-power module designed for commercial rooftops, solar farms, and large residential installations. Thanks to its half-cut architecture and multi-busbar interconnections, the module maintains high efficiency even under weaker irradiance and on hot days, resulting in a real increase in energy yield per square meter of roof compared to older P-type modules. ### What warranty does the Sunova Tarzan Series come with? Sunova provides a 12-year product warranty and a 25-year power performance warranty for the Tarzan Series, matching the industry standard for modern monocrystalline modules. The manufacturer guarantees limited, linear power degradation over this period, which translates into stable energy yield throughout the installation's lifecycle when properly installed. ### What is half-cut cell technology in the Tarzan Series and is it worth choosing? Half-cut technology splits each silicon cell in half, reducing current losses and improving module performance under partial shading, such as from a chimney or antenna. In practice, this means lower energy losses in difficult conditions and higher mechanical durability, making it a sound choice for both pitched roofs and ground-mounted systems. ### Are Sunova Tarzan Series panels resistant to PID? Yes, the Tarzan Series is engineered with enhanced PID (potential-induced degradation) resistance. This matters for installations exposed to moisture and for large series strings operating at high voltage. As a result, the risk of power loss over time is minimized, even under more demanding operating conditions. ### Is the Sunova Tarzan Series a bifacial panel? The base version of the Tarzan Series is a monofacial module, but select configurations feature a dual-glass bifacial design that captures extra energy from reflected light. Choosing the bifacial version makes sense over light-colored surfaces, such as gravel or white roofing, and in ground-mounted installations where reflected light is higher. ### Are Sunova panels a good choice given the manufacturer isn't Tier 1? Sunova Solar Technology is a Chinese panel manufacturer that currently doesn't hold Tier 1 status under the Bloomberg NEF ranking, though this classification mainly reflects project financing scale rather than direct technical quality. The Tarzan Series offers industry-standard 12- and 25-year warranties along with proven half-cut and multi-busbar technologies, making it a solid cost-to-quality option once IEC and TÜV certifications are verified. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/S9B-132-645-665W-2384x1303x35-824be5e67bc1.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +4.0 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, +4.0 pp, +5 yr warranty | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, +3.8 pp, +5 yr warranty | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +3.8 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Cooler, +3.8 pp, +5 yr warranty | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, +3.7 pp, +5 yr warranty | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, +3.6 pp, +5 yr warranty | | [Sunova RS645~665S9B-132 (645W)](https://comparepv.com/panel/thornova-rs645-665s9b-132-645w) | 645 W | -15 W, -0.4 pp | | [Sunova RS645~665S9B-132 (650W)](https://comparepv.com/panel/thornova-rs645-665s9b-132-650w) | 650 W | -10 W, -0.3 pp | | [Sunova RS645~665S9B-132 (655W)](https://comparepv.com/panel/thornova-rs645-665s9b-132-655w) | 655 W | Very close match | | [Sunova RS645~665S9B-132 (665W)](https://comparepv.com/panel/thornova-rs645-665s9b-132-665w) | 665 W | Very close match | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +145 W, cooler, +3.9 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +140 W, cooler, +3.7 pp | | [AIKO AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 W | +135 W, cooler, +3.6 pp | | [AIKO AIKO-A790-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a790-grh78dw) | 790 W | +130 W, cooler, +3.4 pp | | [Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-760) | 760 W | +100 W, cooler, +3.3 pp | --- Source: https://comparepv.com/panel/thornova-rs645-665s9b-132-660w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.