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Resun Solar Brand review

RS8H-M-DG

535 Wp TOPCon Bifacial 2500%
ComparePV verdict

Middle of its segment, weak in heat

Rank 5,348 of 14,005
Compare panels Datasheet PDF
Power (Wp)
535
Strong · top 10%
Efficiency (%)
22.53
Typical · median 22.73%
Density (Wp/m²)
225.3
Typical · median 227.4
Temp (%/°C)
-0.300
Weak · bottom 20%
Weight (kg)
28.9
Weak · 1.9 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The RS8H-M-DG series is a bifacial photovoltaic module built in a double-glass design, engineered for installations that aim to capture extra energy yield from the rear side of the panel. It is based on N-type TOPCon cells using half-cut technology, which reduces internal power loss within the module and lowers susceptibility to hot-spot effects caused by partial shading. The applied multi-busbar (16BB) technology reduces the risk of performance loss from micro-cracks or broken busbars, translating into higher long-term reliability. The manufacturer highlights strong PID resistance, which limits power degradation and helps lower the effective levelized cost of energy (LCOE). Thanks to tempered glass with enhanced light transmittance, the panel maintains solid low-light performance, while certifications confirm resistance to high wind and snow loads as well as salt mist and ammonia exposure. This makes it a fitting choice for investors in rooftop and ground-mount installations who value durability, stable energy output under challenging conditions, and a favorable 30-year linear power warranty.

Ranking

432 panels in the segment TOPCon 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.53% 22.73% Typical 3,982
Power density 225.3 227.4 Typical 4,206
Temperature coefficient -0.300 -0.290 Weak · bottom 20% 6,093
Weight per kWp 54.0 52.4 Weak · bottom 23% 8,224
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 2 caution
Best for

Commercial and utility-scale.

Not ideal for

Hot climates and weight-limited structures.

Watch-outs
-0.300 %/°C temperature coefficient

Bottom 20% of the TOPCon 500-550 W segment, against a median of -0.290.

54.0 kg per kWp

Bottom 23% of the TOPCon 500-550 W segment, against a median of 52.4.

Notes from the database
  • At 22.5% efficiency, this panel is on par with typical TOPCon 500-550W modules
  • At 225.3 W/m² power density, roof space requirements are typical for TOPCon 500-550W panels
  • At -0.30%/°C, hot weather performance is typical for TOPCon 500-550W panels
  • Weight of 28.9 kg is 1.9 kg above TOPCon 500-550W median (27.0 kg) - verify structural support
  • #3982 for efficiency, #6093 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 535 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.53 % Typical Segment median 22.73%
Vmpp · Impp 39.58 V · 13.52 A Operating point at max power
Voc · Isc 46.50 V · 14.42 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2094×1134×30 mm · 2.37 m² of roof
Weight 28.9 kg Weak Weak · 1.9 kg above median
Cells 132 · TOPCon Monocrystalline
Bifaciality 2500 % Rear output as a share of front
Coefficient Pmax -0.300 %/°C Weak bottom 20% of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 15 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
-
With bifacial gain
-

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

Heat losses
-0.300 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS8H-M-DG 535 W 22.53% -0.300 28.9 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +2.5 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg -40 W, lighter, +2.3 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +2.3 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +2.2 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +2.1 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg -45 W, lighter, +2.0 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, lighter, +2.0 pp
RS8H-M-480 480 W 20.21% -0.350 26.3 kg -55 W, hotter, -2.3 pp
RS8H-M-485 485 W 20.42% -0.350 26.3 kg -50 W, hotter, -2.1 pp
RS8H-M-490 490 W 20.64% -0.350 26.3 kg -45 W, hotter, -1.9 pp
RS8H-M-495 495 W 20.85% -0.350 26.3 kg -40 W, hotter, -1.7 pp
RS8H-M-500 500 W 21.06% -0.350 26.3 kg -35 W, hotter, -1.5 pp
RS8H-M-505 505 W 21.27% -0.350 26.3 kg -30 W, hotter, -1.3 pp
RS8H-M-510 510 W 21.48% -0.350 26.3 kg Hotter, lighter, -1.1 pp
RS8H-M-515 515 W 21.69% -0.350 26.3 kg Hotter, lighter, -0.8 pp
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +55 W, lighter, +1.3 pp

Found 397 panels of the same or similar size to this one, within ±10 mm. See them here Found 408 panels of the same or similar size to this one, within ±25 mm. See them here Found 425 panels of the same or similar size to this one, within ±50 mm. See them here Found 953 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How much extra power can you get from the bifacial design of the RS8H-M-DG panel?
Thanks to its bifacial construction, the RS8H-M-DG module also generates energy from its rear side, capturing light reflected from the ground. Depending on the albedo of the surface beneath the array (e.g., light gravel, snow, white roofing membrane), mounting height, and tilt angle, the additional energy gain can range from a few percent up to more than ten percent compared to a monofacial module of the same 535 Wp nominal power.
How does the TOPCon technology in the RS8H-M-DG differ from classic PERC cells?
The N-type TOPCon cells used in the RS8H-M-DG have lower recombination losses and higher base efficiency than older P-type PERC cells, resulting in higher power output from the same surface area. N-type TOPCon also shows lower light-induced degradation (LID) and performs better at higher temperatures, so the panel loses less power on hot days.
What warranty comes with the RS8H-M-DG panels, and what does it cover?
Resun Solar provides a 15-year product warranty for the RS8H-M-DG series, covering material and workmanship defects, along with a 30-year linear power output warranty. This means the manufacturer guarantees a minimum level of energy production over three decades, which is important when estimating the long-term profitability of an installation.
Is the RS8H-M-DG suitable for harsh environments, such as coastal areas?
Yes, the RS8H-M-DG module holds certifications confirming resistance to salt mist and ammonia, making it a suitable choice for coastal installations and agricultural sites exposed to ammonia fumes, such as those near livestock facilities. The panel is also tested for high wind and snow loads, confirming its durability under varying climate conditions.
What benefit does the 16BB multi-busbar technology provide on the RS8H-M-DG panel?
The 16-busbar technology increases the number of electrical connections across the cell surface, so if a microcrack or busbar break occurs, current can flow through alternative paths. This reduces power degradation over the module's operating life and increases installation reliability, especially where panels are exposed to mechanical stress such as transport or strong wind.
Does the RS8H-M-DG perform well in low-light conditions, such as in fall or winter?
Yes, thanks to tempered glass with increased light transmittance and N-type TOPCon cells, the panel maintains relatively good performance under diffuse and weaker light typical of cloudy fall and winter days. The double-glass construction further supports stable operating parameters in these conditions, though energy output will always be lower than on sunny summer days.
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