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Resun Solar Brand review

RS7E-210M

210 Wp Monocrystalline
ComparePV verdict

Space saver, weak in heat

Rank 13,351 of 14,005
Compare panels Datasheet PDF
Power (Wp)
210
Typical for its class
Efficiency (%)
19.20
Strong · top 15%
Density (Wp/m²)
192.3
Strong · top 13%
Temp (%/°C)
-0.390
Weak · bottom 24%
Weight (kg)
12.0
Strong · 3.5 kg below median
Warranty (yrs)
30
Strong · top 18%

The RS7E-210M series consists of compact monocrystalline modules built for installations where reliability matters more than squeezing maximum output per square meter - off-grid systems, solar water pumping, rural electrification, and small residential setups. The panel is built from 36 cells measuring 166x166 mm in a 9BB multi-busbar configuration, which reduces internal power loss and noticeably lowers the risk of microcracks and broken current paths - a common failure point in cheaper panels. Thanks to high-transmittance tempered glass with an anti-reflective coating, the module maintains solid low-light performance, valued by users running systems through mornings, evenings, and overcast days. The construction has been validated for harsh operating conditions - resistance to salt mist and ammonia exposure makes the panel well suited to coastal regions, agricultural sites, and industrial zones, while its certified wind and snow load capacity keeps it stable under extreme weather. Strong anti-PID resistance limits power degradation over time, translating into steadier energy yield and a lower LCOE across the system's lifespan. This is a solution for installers looking for a proven, compact panel for specialized applications rather than standard large residential rooftops.

Ranking

553 panels in the 110-310 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 19.20% 16.64% Strong · top 15% 12,855
Power density 192.3 166.1 Strong · top 13% 12,827
Temperature coefficient -0.390 -0.370 Weak · bottom 24% 13,579
Weight per kWp 57.1 67.9 Strong · top 16% 11,083
Performance warranty 30 yrs 25 yrs Strong · top 18% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

3 positive · 1 caution
Best for

Residential.

Not ideal for

Hot climates.

Strengths
192.3 watts per square metre

Top 13% of the 110-310 W band, against a median of 166.1.

19.20% module efficiency

Top 15% of the 110-310 W band, against a median of 16.64%.

57.1 kg per kWp

Top 16% of the 110-310 W band, against a median of 67.9.

Watch-outs
-0.390 %/°C temperature coefficient

Bottom 24% of the 110-310 W band, against a median of -0.370.

Notes from the database
  • Module efficiency of 19.2% is 2.6pp below average for database panels (median: 21.8%)
  • At 192.3 W/m², this panel generates 25.8 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
  • Weight of 12.0 kg (14.5 kg below database median of 26.5 kg) allows easier transport and roof mounting
  • In the top 92% for efficiency among all N-type panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 210 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.20 % Strong Segment median 16.64%
Vmpp · Impp 20.05 V · 10.48 A Operating point at max power
Voc · Isc 23.95 V · 11.07 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1560×700×30 mm · 1.09 m² of roof
Weight 12.0 kg Strong Strong · 3.5 kg below median
Cells 36 Monocrystalline
Coefficient Pmax -0.390 %/°C Weak bottom 24% 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 Strong top 18% · median 25 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 -0.370
-

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS7E-210M 210 W 19.20% -0.390 12.0 kg You are here
GKA182M160W 160 W 23.00% - 9.0 kg -50 W, lighter, +3.8 pp
GKA182M180W 180 W 23.00% - 9.0 kg -30 W, lighter, +3.8 pp
GKA182M200W 200 W 23.00% - 9.0 kg -10 W, lighter, +3.8 pp
GKA182M240W 240 W 23.00% - 10.8 kg +30 W, lighter, +3.8 pp
GKA182M260W 260 W 23.00% - 10.8 kg +50 W, lighter, +3.8 pp
NS-220MH-80 220 W 22.06% -0.290 10.5 kg Cooler, +2.9 pp, -5 yr warranty
NS-220MH-80 220 W 22.06% -0.290 10.5 kg Cooler, +2.9 pp, -5 yr warranty
DM260M10T-B32HBT 260 W 22.00% -0.290 15.3 kg +50 W, cooler, +2.8 pp
DM255M10T-B32HBT 255 W 21.60% -0.290 15.3 kg +45 W, cooler, +2.4 pp
YH250W-16M 250 W 21.22% -0.340 12.4 kg +40 W, cooler, +2.0 pp
ZEUS 1.2 FullBlack 280W 280 W 23.31% -0.260 14.3 kg +70 W, cooler, +4.1 pp
GKA182M285W 285 W 23.00% - 10.8 kg +75 W, lighter, +3.8 pp
GKA182M270W 270 W 23.00% - 10.8 kg +60 W, lighter, +3.8 pp
DM270M10T-B32HBT 270 W 22.90% -0.290 15.3 kg +60 W, cooler, +3.7 pp
ZEUS 1.2 FullBlack 275W 275 W 22.89% -0.260 14.3 kg +65 W, cooler, +3.7 pp
ZEUS 1.2 FullBlack 270W 270 W 22.47% -0.260 14.3 kg +60 W, cooler, +3.3 pp

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Common questions

6 answered
What applications is the Resun Solar RS7E-210M panel suited for?
The RS7E-210M 210 Wp is a compact monocrystalline module designed for off-grid systems, solar pumps, rural electrification, and small residential installations where reliability matters more than maximum power per square meter. It is not intended for large rooftop arrays but rather for specialized applications requiring a proven, compact design.
What warranty comes with the RS7E-210M series?
Resun Solar offers a 12-year product warranty along with a 30-year power output warranty. This means the module is expected to maintain its guaranteed generation level for three decades, while any material or manufacturing defects during the first 12 years are covered under manufacturer responsibility.
What is multi-busbar 9BB technology in the RS7E-210M and is it worth it?
9BB refers to a nine-busbar configuration on each of the 36 cells (166x166 mm), which collect current from the cell into the panel circuit. More busbars mean shorter current paths, lower resistive losses, and reduced risk of microcracks and broken current paths - a common failure cause in cheaper panels. This provides a real durability advantage, especially during transport and installation in rough terrain.
Is the RS7E-210M suitable for coastal or agricultural environments?
Yes, the RS7E-210M has been verified for resistance to salt mist and ammonia corrosion, making it suitable for coastal installations, farms, and industrial zones where standard panels may corrode or degrade faster. It also withstands high wind and snow loads, performing reliably under extreme weather conditions.
Does the RS7E-210M perform well in low-light conditions, such as mornings or cloudy days?
Yes, thanks to its tempered glass with high light transmittance and anti-reflective coating, the module maintains good performance even at low sun angles and in diffuse light. Users running morning, evening, or frequently overcast installations value this as an advantage over cheaper panels lacking similar coatings.
What is PID resistance in the RS7E-210M and why does it matter?
PID (Potential Induced Degradation) is a phenomenon where voltage differences within a system cause a gradual loss of module power output over time, reducing efficiency in unprotected panels. The RS7E-210M's high PID resistance limits this degradation, resulting in a more stable energy yield throughout the system's lifetime and lower LCOE over the installation's service life.
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