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Resun Solar Brand review

RS8I-M FULL BLACK 550W

550 Wp Monocrystalline
ComparePV verdict

Middle of its segment, weak in heat

Rank 6,938 of 14,005
Compare panels Datasheet PDF
Power (Wp)
550
Typical for its class
Efficiency (%)
21.28
Weak · bottom 24%
Density (Wp/m²)
212.8
Weak · bottom 24%
Temp (%/°C)
-0.390
Weak · bottom 1%
Weight (kg)
28.6
Typical · median 28.5 kg
Warranty (yrs)
30
Typical · median 30 yrs

The RS8I-M FULL BLACK series is designed for anyone who expects a solar module to deliver not just performance but also an aesthetic that fits modern roof architecture. The panels use Half-Cut technology combined with PERC cells, allowing the module to maintain stable operation even under partial shading and reducing the risk of hot-spot formation. The multi-busbar cell structure lowers internal power losses and improves conversion efficiency, translating into real annual energy gains. Everything is enclosed in an elegant, uniformly black frame that eliminates the contrasting elements seen on classic panels - a solution frequently chosen for pitched-roof residential installations where the visual appearance of the system matters. The module's construction ensures high resistance to snow and wind loads, and the panels also withstand salt mist and ammonia exposure, making them a versatile choice for urban, rural, and coastal installations alike. The RS8I-M FULL BLACK is well suited for projects where mounting space is limited and the investor wants to maximize energy yield from every square meter of roof.

Ranking

7,481 panels in the 450-650 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 21.28% 22.30% Weak · bottom 24% 8,795
Power density 212.8 223.0 Weak · bottom 24% 8,643
Temperature coefficient -0.390 -0.292 Weak · bottom 1% 13,579
Weight per kWp 52.0 52.7 Typical 5,417
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 · 3 caution
Best for

Residential, BIPV 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 1% of the 450-650 W band, against a median of -0.292. Ranked 13,579th in the whole database.

21.28% module efficiency

Bottom 24% of the 450-650 W band, against a median of 22.30%.

212.8 watts per square metre

Bottom 24% of the 450-650 W band, against a median of 223.0.

Notes from the database
  • Module efficiency of 21.3% is 0.5pp below average for database panels (median: 21.8%)
  • Power density of 212.8 W/m² is 5.3 W/m² below database median (218.1 W/m²) - needs more roof space
  • -0.39%/°C temperature coefficient - 0.09pp worse than database median (-0.30%/°C), expect higher hot weather losses
  • Weight of 28.6 kg is 2.1 kg above database median (26.5 kg) - verify structural support
  • #8795 for efficiency, #13579 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 550 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.28 % Weak Segment median 22.30%
Vmpp · Impp 41.96 V · 13.11 A Operating point at max power
Voc · Isc 49.90 V · 14.00 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2279×1134×35 mm · 2.58 m² of roof
Weight 28.6 kg Typical Typical · median 28.5 kg
Cells 144 Monocrystalline
Coefficient Pmax -0.390 %/°C Weak bottom 1% 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 -0.292
-

Alternatives

All Resun Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Resun Solar RS8I-M FULL BLACK 550W 550 W 21.28% -0.390 28.6 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +3.7 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +3.5 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +3.4 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +3.3 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, lighter, +3.2 pp
RS8I-M HC-535 535 W 20.70% -0.340 28.6 kg -15 W, cooler, -0.6 pp
RS8I-540M-BD 540 W 20.94% -0.390 29.0 kg -10 W, -0.3 pp
RS8I-M HC-540 540 W 20.89% -0.340 28.6 kg -10 W, cooler, -0.4 pp
RS8I-545M-BD 545 W 21.13% -0.390 29.0 kg Very close match
RS8I-M HC-545 545 W 21.09% -0.340 28.6 kg Cooler
RS8I-M HC-555 555 W 21.47% -0.340 28.6 kg Cooler
RS8I-555M-F30 555 W 21.50% -0.390 27.2 kg Lighter, +0.2 pp
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +100 W, cooler, +3.9 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +95 W, cooler, +3.7 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg +90 W, cooler, +3.5 pp
AIKO-A635-MAE72Mw 635 W 24.60% -0.260 27.0 kg +85 W, cooler, +3.3 pp

Found 2326 panels of the same or similar size to this one, within ±10 mm. See them here Found 2368 panels of the same or similar size to this one, within ±25 mm. See them here Found 2382 panels of the same or similar size to this one, within ±50 mm. See them here Found 2542 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the RS8I-M FULL BLACK series still available for purchase?
No, production of the RS8I-M FULL BLACK series has ended and the model has been discontinued by the manufacturer. Units may still be available through distributors as remaining stock, but for larger installations or system expansions it is worth checking availability with your supplier first, since inventory levels vary by region.
What warranty comes with Resun Solar RS8I-M FULL BLACK panels?
The manufacturer provides a 12-year product warranty along with a 30-year linear power output warranty. This means the panel is expected to retain a guaranteed percentage of its original power output throughout its service life, while material or manufacturing defects during the first 12 years are covered by direct service support.
Are RS8I-M FULL BLACK panels suitable for a sloped roof on a single-family home?
Yes, this is one of the series' primary applications. The uniform black frame without contrasting elements gives the installation a clean look that blends with dark roofing, making it especially popular for sloped roofs on residential buildings. The panel's structure also offers high resistance to snow and wind loads, adding safety on typical roof frames.
How does Half-Cut technology in the RS8I-M differ from panels with full-size cells?
Half-Cut technology involves cutting standard cells in half, which reduces current losses and improves module efficiency, particularly under partial shading such as from a chimney or antenna. Combined with PERC cells and a multi-busbar structure, the RS8I-M reduces the risk of hot spots and maintains more stable performance than modules with full-size cells.
What is the maximum power output of the RS8I-M FULL BLACK, and how many panels are needed for a typical 5 kWp system?
This series reaches a maximum power output of up to 560 Wp. At that output, building a roughly 5 kWp system requires approximately 9 modules, making the series an efficient choice where roof space is limited and maximizing energy yield per square meter of roof is a priority.
Are RS8I-M FULL BLACK panels suitable for coastal or agricultural installations?
Yes, the modules are resistant to salt mist and ammonia exposure, making them a safe choice both for coastal areas prone to salt corrosion and for farm sites where ammonia compounds from barns or stables may be present in the air. This versatility makes the panels suitable for urban, rural, and coastal installations alike.
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