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Solarspace Brand review

SSA-66HD-590N

590 Wp N-type Bifacial 80%
ComparePV verdict

Middle of its segment, modest efficiency

Rank 4,861 of 14,005
Compare panels Datasheet PDF
Power (Wp)
590
Strong · top 15%
Efficiency (%)
21.84
Weak · bottom 10%
Density (Wp/m²)
218.4
Weak · bottom 11%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
32.5
Weak · 3.0 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The Solarspace SSA-66HD 590-620N (Lumina II) series has been designed to maximize energy yield in installations where every square meter counts. The use of N-type cells in TOPCon technology helps to minimize typical power losses over time and maintain the module's high efficiency for years, even under varying weather conditions. The bifacial dual-glass construction allows for efficient use of reflected light from the ground, which translates into real benefits, especially on flat roofs, ground-mounted structures, and PV farms.

Another notable feature is excellent performance at high temperatures, which means the installation loses less efficiency on hot days - a significant advantage in Poland during the summer, especially on dark roofing materials. The modules have high mechanical strength, making it easier to design installations in locations exposed to wind and snow loads.

Lumina II is a suitable choice for commercial and industrial investors, PV farm developers, and projects where stable yields and predictable operation are a priority.

Ranking

259 panels in the segment N-type 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.84% 22.45% Weak · bottom 10% 6,985
Power density 218.4 224.5 Weak · bottom 11% 6,954
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 55.1 52.3 Weak · bottom 24% 9,503
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

Commercial, utility-scale and hot-climate.

Not ideal for

Tight roof space, roofs where every square metre has to count and weight-limited structures.

Watch-outs
21.84% module efficiency

Bottom 10% of the N-type 550-600 W segment, against a median of 22.45%.

218.4 watts per square metre

Bottom 11% of the N-type 550-600 W segment, against a median of 224.5.

55.1 kg per kWp

Bottom 24% of the N-type 550-600 W segment, against a median of 52.3.

Notes from the database
  • Efficiency of 21.8% is 0.6pp below the N-type 550-600W median (22.4%)
  • Power density of 218.4 W/m² is 6.1 W/m² below N-type 550-600W median (224.5 W/m²) - needs more roof space
  • At -0.29%/°C, hot weather performance is typical for N-type 550-600W panels
  • At 32.5 kg, this panel is 3.0 kg heavier than the N-type 550-600W median (29.5 kg) - more demanding for installation crews
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 590 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.84 % Weak Segment median 22.45%
Vmpp · Impp 40.19 V · 14.70 A Operating point at max power
Voc · Isc 48.18 V · 15.62 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2382×1134×30 mm · 2.70 m² of roof
Weight 32.5 kg Weak Weak · 3.0 kg above median
Cells 132 · N-type Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.260 · 0.045 %/°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 87.4 % Equals 516 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Solarspace in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 590 Wp appear here. The rest cover the whole series.

Power Output / Module Efficiency (Linear Power Warranty) Power Output / Module Efficiency (Linear Power Warranty) Whole series I-V/P-V Curve at Different Irradiation (SSA-66HD-610N) I-V/P-V Curve at Different Irradiation (SSA-66HD-610N) Whole series I-V Curve at Different Temperature (SSA-66HD-610N) I-V Curve at Different Temperature (SSA-66HD-610N) Whole series

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
-0.290 %/°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.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Solarspace SSA-66HD-590N 590 W 21.84% -0.290 32.5 kg You are here
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg -30 W, lighter, +3.0 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg +50 W, lighter, +3.0 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg -35 W, lighter, +2.8 pp
AIKO-A635-MAE72Mw 635 W 24.60% -0.260 27.0 kg +45 W, lighter, +2.8 pp
AIKO-A630-MAH72Dw 630 W 24.40% -0.260 32.5 kg +40 W, cooler, +2.6 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg -40 W, 16 kg lighter, +2.6 pp
SSA-66HD-595N 595 W 22.03% -0.290 32.5 kg Very close match
SSA-66HD-600N 600 W 22.21% -0.290 32.5 kg +10 W, +0.4 pp
SSA-66HD-605N 605 W 22.40% -0.290 32.5 kg +15 W, +0.6 pp
SSA-66HD-610N 610 W 22.58% -0.290 32.5 kg +20 W, +0.7 pp
SSA-66HD-615N 615 W 22.77% -0.290 32.5 kg +25 W, +0.9 pp
SSA-66HD-620N 620 W 22.95% -0.290 32.5 kg +30 W, +1.1 pp
SSA-66HD-625N 625 W 23.14% -0.290 32.5 kg +35 W, +1.3 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +90 W, lighter, +3.4 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +85 W, lighter, +3.2 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +110 W, cooler, +3.2 pp

Found 1119 panels of the same or similar size to this one, within ±10 mm. See them here Found 1125 panels of the same or similar size to this one, within ±25 mm. See them here Found 1236 panels of the same or similar size to this one, within ±50 mm. See them here Found 1917 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is TOPCon technology in Solarspace Lumina II panels and how does it compare to PERC?
TOPCon (Tunnel Oxide Passivated Contact) N-type cells achieve higher efficiency than conventional PERC cells and exhibit lower linear degradation rates. In practice, the Solarspace SSA-66HD retains more of its rated output over time and performs better in high temperatures and diffuse-light conditions — both of which matter significantly in real-world installations where weather variability is constant.
What warranty does the Solarspace SSA-66HD 590-620N Lumina II carry?
Solarspace backs the Lumina II series with a 12-year product warranty and a 30-year linear power output warranty. The 30-year power guarantee means the module must retain a minimum specified efficiency throughout its operational life — one of the longer warranty standards on the market and a key factor when calculating LCOE for commercial or utility-scale projects.
Is the Solarspace Lumina II bifacial panel suitable for ground-mount systems and solar farms?
Yes, the bifacial dual-glass design of the SSA-66HD series is especially effective in ground-mount and utility-scale installations where the rear side of the module captures albedo light reflected from the surface below. The bifacial gain is most pronounced with bright ground materials such as gravel, white membranes, or light soil, combined with adequate clearance height — both standard in solar farm layouts.
How does the Solarspace SSA-66HD 590-620N perform in high temperatures during summer?
N-type TOPCon cells have a lower temperature coefficient of Pmax compared to PERC cells, meaning the Lumina II loses less output on hot summer days. This is particularly relevant for rooftop installations on dark-colored roofing materials, where module temperature can exceed ambient air temperature by 20–30°C, significantly cutting into daily energy yield.
What is the maximum power output of the Solarspace SSA-66HD and how many variants does the series include?
The SSA-66HD 590-620N series spans peak power ratings from 590 Wp to 620 Wp across multiple bin variants. The top-tier 620 Wp module sits firmly in the high-power 66-cell category. This range lets designers select the specific wattage that best fits their BoS configuration, string sizing, and inverter MPPT requirements.
Is Solarspace a Tier 1 manufacturer and is it a safe choice for a large commercial PV installation?
Yes, Solarspace is recognized as a Tier 1 manufacturer by BloombergNEF, reflecting a positive bankability assessment — lenders are more willing to finance projects using Tier 1 modules. The company is headquartered in China, which is standard for most global PV manufacturers. Tier 1 status is primarily a financial rating, but it is a critical criterion when securing project financing for commercial and utility-scale installations.
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