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Solar N Plus Brand review

CN4-620W

620 Wp N-type Bifacial 80%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 11,242 of 14,005
Compare panels Datasheet PDF
Power (Wp)
620
Typical for its class
Efficiency (%)
22.18
Weak · bottom 12%
Density (Wp/m²)
221.8
Weak · bottom 13%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
37.3
Weak · 4.8 kg above median
Warranty (yrs)
-
Not published

The Solar N Plus CN4 series is designed to maximize energy yield from the same surface area - particularly in situations where every square meter of roof space or limited mounting points are crucial. Its key advantage lies in the use of N-type cells in TOPCon technology, which maintain their efficiency over time and are less susceptible to typical losses seen in older systems (e.g., light- or potential-induced degradation). This translates to more stable energy production and a more predictable return on investment.

The CN4 series also features low temperature sensitivity, which helps maintain higher performance on hot days when many modules lose the most energy. The materials and construction also support PID and LID resistance, and in selected variants, it offers bifacial and dual-sided construction, which is useful for flat roofs and ground-mounted installations.

This is a series for investors who want to increase energy yield without increasing the size of their installation and are looking for a technology that genuinely improves the energy balance of their system.

Ranking

359 panels in the segment N-type 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.18% 22.77% Weak · bottom 12% 5,930
Power density 221.8 227.7 Weak · bottom 13% 5,869
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 60.2 52.7 Weak · bottom 5% 12,376
Performance warranty - 30 yrs Not published 13,880
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 3 caution
Best for

Utility-scale, commercial and hot-climate.

Not ideal for

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

Watch-outs
60.2 kg per kWp

Bottom 5% of the N-type 600-650 W segment, against a median of 52.7. Ranked 12,376th in the whole database.

22.18% module efficiency

Bottom 12% of the N-type 600-650 W segment, against a median of 22.77%.

221.8 watts per square metre

Bottom 13% of the N-type 600-650 W segment, against a median of 227.7.

Notes from the database
  • Module efficiency of 22.2% is 0.6pp below average for N-type 600-650W panels (median: 22.8%)
  • At 221.8 W/m², this panel generates 5.9 W/m² less per unit area than N-type 600-650W median (227.7 W/m²)
  • Temperature coefficient of -0.29%/°C matches the N-type 600-650W median
  • Weight of 37.3 kg is 4.8 kg above N-type 600-650W median (32.5 kg) - verify structural support
  • 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces

Specifications

Open datasheet PDF
Nominal power (Pmax) 620 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.18 % Weak Segment median 22.77%
Vmpp · Impp 47.88 V · 12.95 A Operating point at max power
Voc · Isc 55.66 V · 13.55 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 37.3 kg Weak Weak · 4.8 kg above median
Cells 156 · 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 -0.250 · 0.045 %/°C
NOCT 42 °C At 800 W/m², 20 °C ambient

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 CN4-620W 620 W 22.18% -0.290 37.3 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +30 W, lighter, +3.0 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +2.8 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +50 W, lighter, +2.6 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +50 W, lighter, +2.6 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +2.6 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +50 W, lighter, +2.6 pp
CN4-625W 625 W 22.35% -0.290 37.3 kg Very close match
SP-N16/156HG-630W 630 W 22.50% -0.290 34.0 kg +10 W, lighter, +0.3 pp
SP-N16/156HG-635W 635 W 22.70% -0.290 34.0 kg +15 W, lighter, +0.5 pp
SP-N16/156HG-640W 640 W 22.90% -0.290 34.0 kg +20 W, lighter, +0.7 pp
SP-N16/156HG-645W 645 W 23.10% -0.290 34.0 kg +25 W, lighter, +0.9 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +60 W, lighter, +3.0 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +55 W, lighter, +2.8 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +80 W, cooler, +2.8 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +75 W, cooler, +2.7 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
Is the Solar N Plus CN4 series still available for purchase?
The CN4 series has been discontinued and is no longer actively offered by the manufacturer. If you need N-type TOPCon technology with similar specs (up to 625 Wp, bifacial cells), consider newer series from this or other manufacturers. Some distributors may still have remaining stock, so check availability before writing off this option entirely.
What is TOPCon technology and why are the N-type cells in the CN4 series better than PERC?
TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that uses a thin silicon oxide layer to reduce electron recombination and boost efficiency. In practical terms, N-type cells in the CN4 are significantly less prone to LID (Light Induced Degradation) and PID (Potential Induced Degradation) than standard P-type PERC modules. This results in lower annual power loss and more predictable energy yield over the system's lifetime.
Does the Solar N Plus CN4 625 Wp panel perform well on hot days?
Yes. The CN4 series features a low temperature coefficient of approximately -0.29%/°C, typical for N-type TOPCon cells. Standard PERC modules lose around -0.35%/°C. When a panel heats up to 70°C, the CN4 retains several percentage points more output — a measurable advantage that adds up to a meaningful energy gain over a full year of operation.
When does it make sense to choose the bifacial dual-glass CN4 variant?
The bifacial dual-glass CN4 variant is most beneficial on flat roofs and ground-mount installations where the rear side can capture reflected irradiance from light-colored surfaces, gravel, or snow. On a typical sloped roof with dark shingles, the bifacial gain is negligible. The dual-glass construction also provides superior moisture resistance and improved mechanical durability compared to standard backsheet modules.
What inverter should I pair with Solar N Plus CN4 625 Wp modules?
With a module power of 625 Wp and open-circuit voltage typical for this power class (around 45–50 V per module), your inverter must have an MPPT voltage range and maximum DC input voltage that safely cover the string voltage at -10°C. For residential installs, standard string inverters with wide MPPT ranges work well; for ground-mount systems, consider high-power string or central inverters. Always verify compatibility against the inverter's technical datasheet.
What warranty did Solar N Plus offer for the CN4 series?
Solar N Plus warranted its N-type modules with a 15-year product warranty (covering material and manufacturing defects) and a 30-year linear power warranty with annual degradation below 0.4%. Since the CN4 is discontinued, verify the exact warranty terms and ongoing support availability with your distributor, as coverage may depend on the original purchase agreement.
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