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Resun Solar RS6S-345P
Resun Solar Brand review

RS6S-345P

345 Wp Polycrystalline
ComparePV verdict

Middle of its segment, weak in heat

Rank 13,159 of 14,129
Compare panels Datasheet PDF
Power (Wp)
345
Weak · bottom 17%
Efficiency (%)
17.78
Weak · bottom 11%
Density (Wp/m²)
177.8
Weak · bottom 12%
Temp (%/°C)
-0.390
Weak · bottom 6%
Weight (kg)
22.0
Weak · bottom 16%
Warranty (yrs)
30
Typical · median 30 yrs

The RS6S-P series consists of 72-cell polycrystalline modules engineered for on-grid installations where predictable performance over decades of operation matters most. Instead of the standard three, the panels feature five busbars, which improves current collection from each cell and reduces resistive losses, translating into more stable module output over time. The cells are manufactured using a junction formation technology adopted from semiconductor manufacturing, delivering longer minority carrier lifetimes and a very tight distribution of production parameters - which in turn minimizes mismatch losses across a string of panels. The panels are PID-free, eliminating the risk of power loss from potential-induced degradation, a common issue in cheaper alternatives. An anti-reflective, hydrophobic coating improves light absorption and helps the surface self-clean from dust, resulting in better yield under low-light conditions - mornings, evenings, and cloudy days. The construction withstands high wind and snow loads, making it well suited to coastal areas, deserts, and lakeside sites. The RS6S-P series is backed by a linear power warranty covering 30 years, along with a 12-year product warranty, making it a sound choice for investors who value low lifecycle cost over simple upfront price.

Ranking

4,187 panels in the 245-445 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 17.78% 20.63% Weak · bottom 11% 13,392
Power density 177.8 206.3 Weak · bottom 12% 13,368
Temperature coefficient -0.390 -0.340 Weak · bottom 6% 13,659
Weight per kWp 63.8 54.7 Weak · bottom 16% 13,027
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 · 5 caution
Best for

Residential.

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 6% of the 245-445 W band, against a median of -0.340. Ranked 13,659th in the whole database.

17.78% module efficiency

Bottom 11% of the 245-445 W band, against a median of 20.63%.

177.8 watts per square metre

Bottom 12% of the 245-445 W band, against a median of 206.3.

What owners get
Five-busbar cell technology

Using five busbars instead of the standard three improves current collection from the cell and reduces resistive losses, resulting in more stable module performance over the system's operating life.

30-year linear power warranty

The power warranty covers 30 years, exceeding the typical 25-year terms offered by competitors in the polycrystalline segment (e.g., Jinko Solar 72 Series), lowering long-term investment risk.

PID-free degradation resistance

The panels are PID-free, eliminating the power loss risk associated with potential-induced degradation - a common issue in lower-cost polycrystalline modules of this generation (2016-2021).

Better low-irradiance performance

The anti-reflective, hydrophobic coating improves light absorption and self-cleaning, translating into higher energy yield at dawn, dusk, and on overcast days compared to modules without such coating.

Reinforced wind and snow load rating

The mechanical design is built for high wind and snow loads, making the series well suited to challenging climates - coastal areas, deserts, and lakeside regions.

Trade-offs
Discontinued production (2021)

The RS6S-P series was discontinued in 2021, meaning limited availability of warranty service, replacement parts, and identical-spec replacement panels for claims arising later during the 30-year warranty period.

Below-market efficiency

At 17.01% efficiency, the module is close to the older Jinko Solar 72 Series Polycrystalline (17%) but notably trails monocrystalline 330 Wp peers - Waaree ARKA (19.81%) and JA Solar Monocrystalline80 (23.15%) - requiring more roof area for the same output power.

Notes from the database
  • Module efficiency of 17.8% is 4.0pp below average for database panels (median: 21.8%)
  • 177.8 W/m² power density is 40.3 W/m² below database median (218.1 W/m²) - requires larger installation area
  • -0.39%/°C temperature coefficient - 0.09pp worse than database median (-0.30%/°C), expect higher hot weather losses
  • 22.0 kg weight - 4.5 kg lighter than database median (26.5 kg), reducing installation effort
  • Ranked #13392 out of 14129 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 345 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 17.78 % Weak Segment median 20.63%
Vmpp · Impp 38.60 V · 8.94 A Operating point at max power
Voc · Isc 47.00 V · 9.43 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1956×992×40 mm · 1.94 m² of roof
Weight 22.0 kg Weak Weak · bottom 16%
Cells 72 Polycrystalline
Coefficient Pmax -0.390 %/°C Weak bottom 6% 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 -0.340
-

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS6S-345P 345 W 17.78% -0.390 22.0 kg You are here
LNSK-340M 340 W 20.08% -0.360 21.0 kg Cooler, +2.3 pp, -5 yr warranty
CS3K-330P 330 W 19.90% -0.360 18.5 kg Lighter, +2.1 pp, -5 yr warranty
CS3K-335MB-AG 335 W 19.90% -0.360 22.3 kg -10 W, cooler, +2.1 pp
CS3U-395P 395 W 19.90% -0.360 22.5 kg +50 W, +2.1 pp, -5 yr warranty
LNSK-335M 335 W 19.78% -0.360 21.0 kg Cooler, +2.0 pp, -5 yr warranty
CS3L-365P 365 W 19.70% -0.360 21.1 kg Cooler, +1.9 pp, -5 yr warranty
CS3U-390P 390 W 19.70% -0.360 22.5 kg +45 W, +1.9 pp, -5 yr warranty
RS6S-325P 325 W 16.76% -0.390 22.0 kg -20 W, -1.0 pp
RS6S330P 330 W 17.03% -0.390 22.0 kg -15 W, -0.8 pp
RS6S-335P 335 W 17.25% -0.390 22.0 kg -10 W, -0.5 pp
RS6S-340P 340 W 17.53% -0.390 22.0 kg -0.2 pp
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +130 W, cooler, +6.2 pp
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg +125 W, cooler, +5.9 pp
SPR-MAX7-465 465 W 23.50% -0.270 21.1 kg +120 W, cooler, +5.7 pp
SPR-MAX6-440 440 W 22.80% -0.290 20.9 kg Cooler, +5.0 pp, +10 yr warranty
SPR-MAX6-435 435 W 22.50% -0.290 20.9 kg Cooler, +4.7 pp, +10 yr warranty

Found 148 panels of the same or similar size to this one, within ±10 mm. See them here Found 241 panels of the same or similar size to this one, within ±25 mm. See them here Found 360 panels of the same or similar size to this one, within ±50 mm. See them here Found 565 panels of the same or similar size to this one, within ±100 mm. See them here

About the RS6S-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 RS6S-P series still available for purchase?
The RS6S-P series has been discontinued from Resun Solar's current production lineup. New installations should generally be based on the manufacturer's current models, though RS6S-P panels may still be available through distributors as remaining stock. Buyers should check the production date and warranty status with the seller before purchasing, as service support for discontinued models can be limited.
What is the maximum power output of the RS6S-P panel and what installations is it suited for?
RS6S-P series panels reach a maximum power output of up to 330 Wp. This is typical for classic 72-cell polycrystalline modules and works well for on-grid installations of medium to large capacity, such as single-family home roofs, outbuildings, or smaller solar farms where stable, predictable energy production matters most.
How does the 5-busbar design differ from standard 3-busbar panels?
Five busbars instead of three provide more current collection paths per cell, reducing resistive losses and shortening the electron travel distance within the cell. This results in more stable long-term performance and lower risk of micro-crack-related power loss. In practice, it translates into slightly higher and more consistent energy yield over the panel's service life.
Are RS6S-P panels resistant to PID degradation?
Yes, the RS6S-P series is PID-free, meaning it does not suffer from power loss caused by voltage-induced polarization between the cell and frame. This is a common issue in cheaper modules, especially in large installations with long panel strings. PID resistance ensures the module maintains its rated output throughout the warranty period without a sudden drop in performance after a few years.
How well do RS6S-P panels perform in low-light and cloudy conditions?
An anti-reflective, hydrophobic coating improves light absorption and helps the surface self-clean from dust and debris. As a result, RS6S-P panels deliver better output in the morning, evening, and on overcast days compared to modules without such coating. This is a significant advantage for locations with variable sunlight, such as Poland, where fully sunny days are not the norm year-round.
What warranty comes with the Resun Solar RS6S-P series and what does it cover?
The manufacturer backs the RS6S-P series with a 12-year product warranty and a 30-year linear power warranty. The product warranty covers material and workmanship defects, while the power warranty guarantees a minimum performance level throughout that period. This combination makes the series a solid choice for long-term life-cycle cost, even though the panel itself has been discontinued from current production.
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