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Runergy Brand review

SS9-66HD-645M

645 Wp PERC Bifacial 70%
ComparePV verdict

Strong in heat, modest efficiency

Rank 4,264 of 14,005
Compare panels Datasheet PDF
Power (Wp)
645
Strong · top 7%
Efficiency (%)
20.76
Weak · bottom 11%
Density (Wp/m²)
207.6
Weak · bottom 12%
Temp (%/°C)
-0.330
Strong · top 6%
Weight (kg)
37.5
Typical · median 34.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Runergy SS9-66HD 645-665M (Lumina I) series is designed to maximize energy yield in large installations, where every square meter and the costs associated with construction and cabling are crucial. These are bifacial modules with a glass-on-glass construction, allowing them to effectively utilize both direct and reflected sunlight from the ground - which significantly improves energy production on PV farms and industrial rooftops. The use of half-cut monocrystalline cells minimizes losses and improves stability under partial shading, which is important in long rows of panels or when there are obstructions on the roof. The modules utilize a multi-bin MBB architecture, which supports reliable connections and better current collection from the cells. Another key feature is the long linear power warranty, which is important for investors focused on predictable LCOE (Levelized Cost of Energy). Lumina I is a good choice for solar farms, logistics halls, and commercial projects where durability, yield, and safety are important.

Ranking

217 panels in the segment PERC 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.76% 21.38% Weak · bottom 11% 10,612
Power density 207.6 213.8 Weak · bottom 12% 10,562
Temperature coefficient -0.330 -0.340 Strong · top 6% 8,545
Weight per kWp 58.1 55.7 Typical 11,573
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 2 caution
Best for

Commercial, utility-scale and shaded-installations.

Not ideal for

Tight roof space and roofs where every square metre has to count.

Strengths
-0.330 %/°C temperature coefficient

Top 6% of the PERC 600-650 W segment, against a median of -0.340. Ranked 8,545th in the whole database.

Watch-outs
20.76% module efficiency

Bottom 11% of the PERC 600-650 W segment, against a median of 21.38%.

207.6 watts per square metre

Bottom 12% of the PERC 600-650 W segment, against a median of 213.8.

Notes from the database
  • Module efficiency of 20.8% is 0.6pp below average for PERC 600-650W panels (median: 21.4%)
  • At 207.6 W/m², this panel generates 6.2 W/m² less per unit area than PERC 600-650W median (213.8 W/m²)
  • Temperature coefficient of -0.33%/°C matches the PERC 600-650W median
  • At 37.5 kg, this panel is 3.5 kg heavier than the PERC 600-650W median (34.0 kg) - more demanding for installation crews
  • 70% bifaciality enables rear-side power generation, boosting yield by 4-10% on reflective surfaces

Specifications

Open datasheet PDF
Nominal power (Pmax) 645 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.76 % Weak Segment median 21.38%
Vmpp · Impp 37.71 V · 17.11 A Operating point at max power
Voc · Isc 45.31 V · 18.11 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×33 mm · 3.11 m² of roof
Weight 37.5 kg Typical Typical · median 34.0 kg
Cells 132 · PERC Monocrystalline
Bifaciality 70 % Rear output as a share of front
Coefficient Pmax -0.330 %/°C Strong top 6% of its segment
Coefficient Voc · Isc -0.260 · 0.046 %/°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
End-of-warranty output 85.0 % Equals 548 W guaranteed
Degradation 2.00 → 0.45 % First year, then annual

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
-0.330 %/°C against a segment median of -0.340
-
Bifacial gain
Rear gain over light concrete: -
-

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

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Runergy SS9-66HD-645M 645 W 20.76% -0.330 37.5 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +4.4 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Cooler, lighter, +4.4 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg Cooler, lighter, +4.2 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +4.2 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +50 W, cooler, +4.1 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +4.0 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg Cooler, lighter, +4.0 pp
SS9-66HD-650M 650 W 20.92% -0.330 37.5 kg Very close match
SS9-66HS-655M 655 W 21.09% -0.340 32.5 kg Lighter, +0.3 pp, -5 yr warranty
SS9-66HD-660M 660 W 21.25% -0.330 37.5 kg +15 W, +0.5 pp
SS9-66HD-665M 665 W 21.41% -0.330 37.5 kg +20 W, +0.6 pp
SS9-66HS-670M 670 W 21.57% -0.340 32.5 kg Lighter, +0.8 pp, -5 yr warranty
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +160 W, cooler, +4.3 pp
AIKO-A800-GRH78Dw 800 W 24.90% -0.260 39.8 kg +155 W, cooler, +4.1 pp
AIKO-A795-GRH78Dw 795 W 24.80% -0.260 39.8 kg +150 W, cooler, +4.0 pp
AIKO-A790-GRH78Dw 790 W 24.60% -0.260 39.8 kg +145 W, cooler, +3.8 pp

Found 1390 panels of the same or similar size to this one, within ±10 mm. See them here Found 1400 panels of the same or similar size to this one, within ±25 mm. See them here Found 1400 panels of the same or similar size to this one, within ±50 mm. See them here Found 1432 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the Runergy SS9-66HD 645-665M (Lumina I) series still available for purchase?
The Runergy Lumina I (SS9-66HD 645-665M) series has been discontinued and is no longer offered as a new product through regular distribution channels. If you need modules with similar specifications from Runergy or another Tier 1 manufacturer, we recommend contacting your distributor for currently available successors in the same power class.
What is the maximum power output of the Runergy Lumina I panels and what installations are they designed for?
The top module in the SS9-66HD series reaches 665 Wp, with the full series spanning 645-665 Wp. These output levels make Lumina I well suited to large-scale commercial and industrial installations — utility-scale PV farms, logistics facility rooftops, and warehouses — where maximizing energy yield per square meter and minimizing BoS cost per kilowatt are the primary goals.
What practical benefit does the bifacial design of the Runergy Lumina I offer, and is it worth the premium?
The bifacial glass-glass construction of the Lumina I allows the module to harvest energy from both the front side and from light reflected off the ground surface. On farms with light-colored gravel or snow cover, this translates to a real production gain of several to over ten percent without adding more array area. The glass-glass encapsulation also extends module service life and reduces the risk of micro-cracks.
What warranty comes with the Runergy SS9-66HD 645-665M (Lumina I) panels?
Runergy provides a 12-year product warranty covering material and manufacturing defects, along with a 30-year linear power output warranty. The linear power warranty guarantees a defined minimum performance level throughout that entire period, enabling precise LCOE modeling and return-on-investment planning for commercial and utility-scale projects.
Does the half-cut PERC cell technology in the Runergy Lumina I improve performance under partial shading?
Yes. Monocrystalline PERC cells split in half reduce internal resistance and limit shading losses because each half-cell operates independently. In long tracker rows or on rooftops with obstructions such as HVAC units, shading one section of the module does not degrade the entire string to the same degree as it would with full-size conventional cells.
What is MBB architecture in the Lumina I panels and how does it affect installation reliability?
MBB (multi-busbar) is the multi-wire interconnection architecture used in the SS9-66HD series. More and thinner busbars shorten the current path within each cell, reduce mechanical stress, and improve resistance to micro-cracks caused by transportation or thermal cycling. The result is lower resistive losses over the module's lifetime and higher overall reliability compared to conventional 3-busbar designs.
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