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Solar N Plus Brand review

SP-N16/156HG-645W

645 Wp TOPCon Bifacial 80%
ComparePV verdict

Solid all-round for its segment

Rank 1,493 of 14,005
Compare panels Datasheet PDF
Power (Wp)
645
Strong · top 3%
Efficiency (%)
23.10
Typical · median 22.80%
Density (Wp/m²)
230.7
Typical · median 227.7
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
34.0
Typical · median 32.7 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Solar N Plus SP-N16/156HG series are N-type modules designed to maximize energy yield per square meter - particularly in situations where power density and limited mounting space are critical. The use of half-cut and MBB technology improves performance under partial shading and reduces connection losses, resulting in more stable energy production in real-world rooftop and industrial conditions. The modules are also optimized for high PID resistance, ensuring better long-term performance - which is important for higher voltage system installations. You also gain good performance in low-light conditions, which is relevant in the Polish climate, with cloudy or smoggy weather. SP-N16/156HG is the ideal choice for PV farms, warehouses, and commercial projects where lower system balance costs and predictable energy production over the long term are key. By combining N-type technology with a refined module design, this series effectively differentiates itself from typical P-type panels in terms of durability and energy yield stability.

Ranking

1,086 panels in the segment TOPCon 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.10% 22.80% Typical 1,570
Power density 230.7 227.7 Typical 1,654
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 52.7 53.1 Typical 6,362
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 · 0 caution
Best for

Commercial, utility-scale and shaded-installations.

Notes from the database
  • Efficiency of 23.1% matches the TOPCon 600-650W median
  • At 230.7 W/m² power density, this panel generates 3.0 W/m² more per unit area than TOPCon 600-650W median (227.7 W/m²)
  • At -0.29%/°C, hot weather performance is typical for TOPCon 600-650W panels
  • At 34.0 kg, this panel is 1.3 kg heavier than the TOPCon 600-650W median (32.7 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) 645 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.10 % Typical Segment median 22.80%
Vmpp · Impp 49.56 V · 13.02 A Operating point at max power
Voc · Isc 57.65 V · 13.75 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2465×1134×30 mm · 2.80 m² of roof
Weight 34.0 kg Typical Typical · median 32.7 kg
Cells 156 · TOPCon 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 -0.250 · 0.045 %/°C
NOCT 42 °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
End-of-warranty output 87.4 % Equals 564 W guaranteed

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
Solar N Plus SP-N16/156HG-645W 645 W 23.10% -0.290 34.0 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +2.1 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +35 W, lighter, +2.1 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +30 W, lighter, +1.9 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +1.9 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +50 W, cooler, +1.8 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +1.7 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg Cooler, lighter, +1.7 pp
CN4-620W 620 W 22.18% -0.290 37.3 kg -25 W, heavier, -0.9 pp
CN4-625W 625 W 22.35% -0.290 37.3 kg -20 W, heavier, -0.8 pp
SP-N16/156HG-630W 630 W 22.50% -0.290 34.0 kg -15 W, -0.6 pp
SP-N16/156HG-635W 635 W 22.70% -0.290 34.0 kg -10 W, -0.4 pp
SP-N16/156HG-640W 640 W 22.90% -0.290 34.0 kg -0.2 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +55 W, cooler, +1.9 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +25 W, cooler, +1.7 pp

Found 616 panels of the same or similar size to this one, within ±10 mm. See them here Found 616 panels of the same or similar size to this one, within ±25 mm. See them here Found 616 panels of the same or similar size to this one, within ±50 mm. See them here Found 1813 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty does the Solar N Plus SP-N16/156HG series come with?
The SP-N16/156HG carries a 15-year product warranty and a 30-year power warranty. After 30 years the module is guaranteed to retain at least 87.4% of its rated output. This is among the longer power warranty schedules available on the market, which is particularly relevant for commercial projects and solar farms operating under long payback horizons.
How does TOPCon technology in the SP-N16/156HG differ from standard PERC panels?
The N-type TOPCon cells used in the SP-N16/156HG eliminate boron-oxygen related Light Induced Degradation (LID) that affects P-type PERC modules. Annual power degradation is approximately 0.4% versus 0.5–0.55% for PERC. Over a 30-year system lifetime this results in meaningfully higher cumulative energy output and stable performance from day one, directly improving overall LCOE.
Does the bifacial SP-N16/156HG actually generate energy from both sides, and is the premium worth it?
Yes, the SP-N16/156HG is a bifacial module with approximately 85% bifaciality factor. The rear side harvests irradiance reflected from the mounting surface, typically adding 2–4% more annual energy on high-albedo substrates such as white roofing membranes, light gravel, or concrete. On standard pitched roofs the gain is more modest, but on elevated ground-mount structures and carports the real-world energy boost can meaningfully improve LCOE.
How does the SP-N16/156HG perform in low-light and overcast conditions?
N-type TOPCon technology delivers better performance under diffuse irradiance than conventional P-type PERC modules. The low temperature coefficient of Pmax at -0.29%/°C also limits power loss on hot summer days. In climates with frequent cloud cover or pollution haze, these two factors combine to increase annual energy yield compared to lower-cost alternatives — a meaningful advantage in Central and Northern European markets.
What type of installations is the SP-N16/156HG best suited for — does it fit on a residential rooftop?
At 650 Wp with dimensions of 2465×1134 mm and a weight of approximately 34 kg, the SP-N16/156HG is an industrial-format module designed primarily for utility-scale solar farms, industrial buildings, warehouses, and large commercial rooftops. For a single-family residential roof, the size and weight can complicate handling and mounting. It excels where minimizing module count per kWp and reducing BoS costs are the primary project drivers.
Is the SP-N16/156HG resistant to PID and compatible with 1500V systems?
The SP-N16/156HG is engineered with high PID (Potential Induced Degradation) resistance, which is a key advantage when operating at elevated system voltages. The module supports a maximum system voltage of DC 1500V, enabling longer string configurations that reduce cabling costs and the number of MPPT inputs required per inverter. Strong PID resistance is especially critical in 1500V systems, where the risk of potential-induced degradation increases significantly and can cause permanent output losses.
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