Skip to main content
Sunova Brand review

RS645~665S9B-132 (665W)

665 Wp Monocrystalline
ComparePV verdict

Light for its output, weak in heat

Rank 3,792 of 14,005
Compare panels Datasheet PDF
Power (Wp)
665
Strong · top 23%
Efficiency (%)
21.40
Weak · bottom 14%
Density (Wp/m²)
214.1
Weak · bottom 15%
Temp (%/°C)
-0.354
Weak · bottom 2%
Weight (kg)
33.0
Strong · top 21%
Warranty (yrs)
25
Weak · bottom 7%

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.

Ranking

4,929 panels in the 565-765 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 21.40% 22.58% Weak · bottom 14% 8,323
Power density 214.1 225.8 Weak · bottom 15% 8,250
Temperature coefficient -0.354 -0.290 Weak · bottom 2% 12,285
Weight per kWp 49.6 53.1 Strong · top 21% 3,172
Performance warranty 25 yrs 30 yrs Weak · bottom 7% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 3 caution
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.

Strengths
49.6 kg per kWp

Top 21% of the 565-765 W band, against a median of 53.1.

Watch-outs
-0.354 %/°C temperature coefficient

Bottom 2% of the 565-765 W band, against a median of -0.290. Ranked 12,285th in the whole database.

25 year performance warranty

Bottom 7% of the 565-765 W band, against a median of 30 yrs. Ranked 9,798th in the whole database.

21.40% module efficiency

Bottom 14% of the 565-765 W band, against a median of 22.58%.

Notes from the database
  • At 21.4% efficiency, this panel is on par with typical database modules
  • Power density of 214.1 W/m² is 4.0 W/m² below database median (218.1 W/m²) - needs more roof space
  • Temperature coefficient of -0.35%/°C is 0.05pp worse than database median (-0.30%/°C) - higher losses in summer heat
  • At 33.0 kg (6.5 kg above database median of 26.5 kg), requires checking roof load capacity
  • In the top 59% for efficiency among all N-type panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 665 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.40 % Weak Segment median 22.58%
Vmpp · Impp 38.28 V · 17.37 A Operating point at max power
Voc · Isc 46.24 V · 18.78 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×35 mm · 3.11 m² of roof
Weight 33.0 kg Strong Strong · top 21%
Cells 132 Monocrystalline
Coefficient Pmax -0.354 %/°C Weak bottom 2% of its segment
Coefficient Voc · Isc -0.266 · 0.046 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Weak bottom 7% · median 30 yrs
End-of-warranty output 85.0 % Equals 546 W guaranteed

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.354 %/°C against a segment median of -0.290
-

Alternatives

All Sunova panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Sunova RS645~665S9B-132 (665W) 665 W 21.40% -0.354 33.0 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +3.8 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Cooler, +3.8 pp, +5 yr warranty
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg Cooler, +3.6 pp, +5 yr warranty
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +3.6 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg Cooler, +3.6 pp, +5 yr warranty
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg Cooler, +3.5 pp, +5 yr warranty
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, +3.4 pp, +5 yr warranty
RS645~665S9B-132 (645W) 645 W 20.80% -0.354 33.0 kg -20 W, -0.6 pp
RS645~665S9B-132 (650W) 650 W 20.90% -0.354 33.0 kg -15 W, -0.5 pp
RS645~665S9B-132 (655W) 655 W 21.10% -0.354 33.0 kg -10 W, -0.3 pp
RS645~665S9B-132 (660W) 660 W 21.20% -0.354 33.0 kg Very close match
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +140 W, cooler, +3.7 pp
AIKO-A800-GRH78Dw 800 W 24.90% -0.260 39.8 kg +135 W, cooler, +3.5 pp
AIKO-A795-GRH78Dw 795 W 24.80% -0.260 39.8 kg +130 W, cooler, +3.4 pp
AIKO-A790-GRH78Dw 790 W 24.60% -0.260 39.8 kg +125 W, cooler, +3.2 pp
TSM-NEG21C.20Q-760 760 W 24.50% -0.260 38.3 kg +95 W, cooler, +3.1 pp

Found 1390 panels of the same or similar size to this one, within ±10 mm. See them here Found 1400 panels of the same or similar size to this one, within ±25 mm. See them here Found 1400 panels of the same or similar size to this one, within ±50 mm. See them here Found 1432 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
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.
Add to compare