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Resun Solar RS6I-365P
Resun Solar Brand review

RS6I-365P

365 Wp Polycrystalline
ComparePV verdict

Middle of its segment, weak in heat

Rank 12,990 of 14,129
Compare panels Datasheet PDF
Power (Wp)
365
Weak · bottom 17%
Efficiency (%)
18.14
Weak · bottom 9%
Density (Wp/m²)
181.4
Weak · bottom 10%
Temp (%/°C)
-0.390
Weak · bottom 4%
Weight (kg)
22.5
Weak · bottom 16%
Warranty (yrs)
30
Typical · median 30 yrs

The RS6I-P series consists of polycrystalline solar modules built with half-cell technology, splitting cells in half to reduce resistive power losses and boost overall panel efficiency. The use of 5 busbar cells lowers the risk of failures caused by micro-cracks and broken current paths, delivering stronger long-term reliability across the module's service life. Thanks to the half-cell layout, the panel also offers significantly greater resistance to the hot-spot effect triggered by partial shading, a key advantage for installations exposed to shadows from trees, chimneys, or nearby buildings. The modules feature robust PID resistance, keeping output stable and reducing LCOE over the system's lifetime. High-transmittance tempered glass with an anti-reflective coating improves energy harvest under low-light conditions, while the anodized aluminum frame ensures mechanical strength against high wind and snow loads. This series fits both rooftop and ground-mounted installations, particularly where durability, consistent energy yield, and resistance to demanding environmental conditions, including salt mist and ammonia exposure, are top priorities.

Ranking

5,598 panels in the 265-465 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 18.14% 21.00% Weak · bottom 9% 13,298
Power density 181.4 210.0 Weak · bottom 10% 13,277
Temperature coefficient -0.390 -0.320 Weak · bottom 4% 13,659
Weight per kWp 61.6 53.8 Weak · bottom 16% 12,763
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 7 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

Hot climates, tight roof space and roofs where every square metre has to count.

Watch-outs
-0.390 %/°C temperature coefficient

Bottom 4% of the 265-465 W band, against a median of -0.320. Ranked 13,659th in the whole database.

18.14% module efficiency

Bottom 9% of the 265-465 W band, against a median of 21.00%. Ranked 13,298th in the whole database.

181.4 watts per square metre

Bottom 10% of the 265-465 W band, against a median of 210.0. Ranked 13,277th in the whole database.

What owners get
Half-cell technology with 5 busbars

Half-cut cells with 5 busbars reduce resistive losses and microcrack risk, improving long-term module reliability compared to older full-cell designs.

High hot-spot and PID resistance

Splitting cells in half significantly limits hot-spot effects under partial shading (e.g., from trees or chimneys), while strong PID degradation resistance ensures stable energy yield and lower LCOE over the installation's lifetime.

30-year power warranty

The manufacturer offers a 30-year linear power warranty, matching current market standards for mass-segment modules and exceeding the typical 25-year warranties of older-generation PERC panels.

Durable build and AR coating

High-transmittance tempered glass with an anti-reflective coating improves energy yield under low irradiance, while the anodized aluminum frame ensures mechanical resistance to wind and snow loads, making the series suitable for harsh environments (salt mist, ammonia exposure).

Established manufacturer (since 2007)

Resun Solar has operated since 2007, giving some manufacturing and operational track record relevant to a panel with a 30-year power warranty, though without confirmed BNEF Tier-1 status as of today.

Trade-offs
Discontinued production

The RS6I-P series has been discontinued, meaning limited availability of warranty service, replacement parts, and difficulty sourcing identical modules for future system expansion.

Lower efficiency than peers

Efficiency of 17.15-18.39% is clearly below peer comparables such as Solitek SOLID Bifacial (19.57%), Solarwatt Panel vision GM 3.0 (19.9%), and Selfa SV120M.3.2 (20.3%) at the same max power of 370 Wp - a 1.5-2 percentage-point gap due to the older polycrystalline cell technology.

Poly technology, not mono/bifacial

Unlike newer competitors (Solitek, Selfa, Solarwatt) that use mono cells and often bifacial technology, RS6I-P retains classic polycrystalline, monofacial cells - requiring more mounting area per unit of power at equal wattage.

12-year product warranty below current standards

The 12-year product warranty is shorter than current tier-1 market standards (often 15-25 years), which can be relevant when assessing total cost of ownership over the system's 30-year power warranty horizon.

Notes from the database
  • At 18.1% efficiency, this panel is 3.7pp below the database median of 21.8%
  • At 181.4 W/m², this panel generates 36.7 W/m² less per unit area than database median (218.1 W/m²)
  • -0.39%/°C temperature coefficient - 0.09pp worse than database median (-0.30%/°C), expect higher hot weather losses
  • 22.5 kg weight - 4.0 kg lighter than database median (26.5 kg), reducing installation effort
  • In the top 94% for efficiency among all N-type panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 365 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 18.14 % Weak Segment median 21.00%
Vmpp · Impp 39.50 V · 9.24 A Operating point at max power
Voc · Isc 47.81 V · 9.75 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2008×1002×35 mm · 2.01 m² of roof
Weight 22.5 kg Weak Weak · bottom 16%
Cells 144 Polycrystalline
Coefficient Pmax -0.390 %/°C Weak bottom 4% of its segment
Coefficient Voc · Isc -0.320 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
Degradation 0.50 % Per year after the first

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
-0.390 %/°C against a segment median of -0.320
-

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS6I-365P 365 W 18.14% -0.390 22.5 kg You are here
LNSU-410M 410 W 20.31% -0.360 24.5 kg +45 W, +2.2 pp, -5 yr warranty
LNSK-340M 340 W 20.08% -0.360 21.0 kg Cooler, +1.9 pp, -5 yr warranty
LNSU-405M 405 W 20.06% -0.360 24.5 kg +40 W, +1.9 pp, -5 yr warranty
CS3K-330P 330 W 19.90% -0.360 18.5 kg Lighter, +1.8 pp, -5 yr warranty
CS3K-335MB-AG 335 W 19.90% -0.360 22.3 kg -30 W, cooler, +1.8 pp
CS3U-395P 395 W 19.90% -0.360 22.5 kg Cooler, +1.8 pp, -5 yr warranty
LNSU-400M 400 W 19.81% -0.360 24.5 kg +35 W, +1.7 pp, -5 yr warranty
LNSK-335M 335 W 19.78% -0.360 21.0 kg Cooler, +1.6 pp, -5 yr warranty
RS6I-345P 345 W 17.15% -0.390 22.5 kg -20 W, -1.0 pp
RS6I-350P 350 W 17.40% -0.390 22.5 kg -15 W, -0.7 pp
RS6I-355P 355 W 17.64% -0.390 22.5 kg -10 W, -0.5 pp
RS6I-360P 360 W 17.89% -0.390 22.5 kg -0.2 pp
RS6I-370P 370 W 18.39% -0.390 22.5 kg +0.2 pp
RS6I-390M 390 W 19.38% -0.340 22.5 kg +25 W, cooler, +1.2 pp
RS6I-395M 395 W 19.63% -0.340 22.5 kg +30 W, cooler, +1.5 pp
RS6I-400M 400 W 19.88% -0.340 22.5 kg +35 W, cooler, +1.7 pp
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +110 W, cooler, +5.9 pp

Found 141 panels of the same or similar size to this one, within ±10 mm. See them here Found 212 panels of the same or similar size to this one, within ±25 mm. See them here Found 329 panels of the same or similar size to this one, within ±50 mm. See them here Found 806 panels of the same or similar size to this one, within ±100 mm. See them here

About the RS6I-P series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

Is the Resun Solar RS6I-P series still available for purchase?
The RS6I-P series has been discontinued by Resun Solar and replaced by newer models with higher power output and efficiency. Panels from this series may still be available from distributors clearing remaining stock, so it is worth checking current availability and asking about production date and warranty terms for modules from the final production batch.
What is the maximum power output of the RS6I-P panel and what installations is it suited for?
Panels in the RS6I-P series reach a maximum power output of up to 370 Wp. This is a typical value for mid-range polycrystalline modules, suitable for residential rooftop installations and smaller ground-mount systems where stable, predictable energy production is the priority rather than maximum power density per square meter.
How does half-cell technology in the RS6I-P differ from standard full-cell panels?
Half-cell technology uses cells cut in half, reducing power losses from conductor heating and lowering the module's series resistance. This makes the panel operate more efficiently, especially under partial shading, and makes it less prone to the hot-spot effect compared to panels using full-size cells.
What warranty does the RS6I-P series come with and what does it cover?
Resun Solar provides a 12-year product warranty and a 30-year power output warranty for the RS6I-P series. The product warranty covers material and workmanship defects, while the power warranty guarantees the panel will maintain its declared energy output level throughout the system's operational lifetime.
Are RS6I-P panels resistant to shading and the hot-spot effect?
Yes, splitting the cells in half using half-cell technology significantly increases resistance to the hot-spot effect caused by partial shading, for example from trees, chimneys, or neighboring buildings. This makes RS6I-P panels better suited to locations where part of the module surface is periodically shaded.
Is the RS6I-P a bifacial panel, and is it suitable for harsh environments like coastal areas?
No, the RS6I-P series uses a monofacial design rather than bifacial, so it generates energy only from the front surface of the module. Thanks to strong PID resistance and an anti-reflective coating on tempered glass, the panels handle harsh environmental conditions well, including salt mist and ammonia vapor, making them suitable for installations near coastlines or agricultural areas.
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