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Heckert Solar Brand review

NEMO 4.2 80M BLACK 390

390 Wp Monocrystalline
ComparePV verdict

Middle of its segment, short guarantee

Rank 12,180 of 14,005
Compare panels Datasheet PDF
Power (Wp)
390
Weak · bottom 20%
Efficiency (%)
20.10
Weak · bottom 22%
Density (Wp/m²)
200.2
Weak · bottom 21%
Temp (%/°C)
-0.340
Typical · median -0.300
Weight (kg)
21.0
Typical · median 22.3 kg
Warranty (yrs)
25
Weak · bottom 19%

The NeMo 4.2 80M Black series is designed for those who expect a solar installation to deliver not only high efficiency but also an aesthetic that suits modern roof architecture. The module is built around half-cut G12 cells with 12 busbars, which improves current distribution and reduces losses under partial shading. Mechanical durability is ensured by the proprietary microCELL TLS technology, a thermal laser separation process that limits microcracks and protects the panel from degradation over time. The fully black frame and backsheet give the module an elegant, uniform appearance that blends seamlessly with dark roof coverings, making it a popular choice for residential installations. Another advantage is its resistance to salt mist and ammonia corrosion, confirmed by IEC 61701 and IEC 62716 certification, making the panel suitable for both coastal regions and agricultural environments. Production takes place exclusively in Germany, powered by electricity from the manufacturer's own PV plants, and the module comes with a 25-year performance warranty, giving investors confidence in stable long-term returns.

Ranking

6,208 panels in the 290-490 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 20.10% 21.26% Weak · bottom 22% 12,102
Power density 200.2 212.5 Weak · bottom 21% 12,179
Temperature coefficient -0.340 -0.300 Typical 8,778
Weight per kWp 53.8 53.3 Typical 7,897
Performance warranty 25 yrs 30 yrs Weak · bottom 19% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 5 caution
Best for

Residential and commercial.

Not ideal for

Owners who want a long output guarantee, roofs where every square metre has to count and tight roof space.

Watch-outs
25 year performance warranty

Bottom 19% of the 290-490 W band, against a median of 30 yrs.

200.2 watts per square metre

Bottom 21% of the 290-490 W band, against a median of 212.5.

20.10% module efficiency

Bottom 22% of the 290-490 W band, against a median of 21.26%.

What owners get
Half-cut G12 cells with 12 busbars

Half-cut G12 cells with 12 busbars improve current distribution and reduce losses under partial shading, translating into higher real-world energy yield (e.g., partial shading from chimneys or antennas).

Compact format at high power output

The 80-cell module (1736x1122 mm) reaches up to 405 Wp, delivering higher power density than standard 108-cell modules of comparable power (e.g., EGing STAR or VSUN405-108BMH-DG), making it easier to fit smaller residential roof areas.

microCELL TLS technology reduces microcracks

The proprietary thermal laser separation (microCELL TLS) process minimizes microcrack risk during manufacturing, resulting in lower long-term power degradation.

German manufacturing powered by in-house PV

Panels are produced exclusively at Heckert Solar's German facilities (in business since 1992), powered by the company's own PV installations, reducing the manufacturing carbon footprint compared to Asian-based competitors dominating the segment.

Certified salt-mist and ammonia corrosion resistance

Verified under IEC 61701 and IEC 62716 certifications, corrosion resistance allows safe installation in coastal areas and agricultural settings where standard modules degrade faster.

Trade-offs
15-year product warranty below market trend

The 15-year product warranty is shorter than the 25-30 year warranties now offered by leading Asian manufacturers (e.g., JinkoSolar, Trina Solar, LONGi), a relevant factor for investors comparing total lifecycle risk.

No confirmed BNEF Tier 1 status

As a niche German manufacturer with limited production scale, Heckert Solar does not clearly appear on the current BNEF Tier 1 list (Q1 2026), which is dominated by large-scale Asian producers — potentially a constraint for bank-financed projects requiring Tier 1 qualification.

Notes from the database
  • Module efficiency of 20.1% is 1.7pp below average for database panels (median: 21.8%)
  • 200.2 W/m² power density is 17.9 W/m² below database median (218.1 W/m²) - requires larger installation area
  • At -0.34%/°C, loses 0.04pp more power per degree than database median (-0.30%/°C)
  • At 21.0 kg, this panel is 5.5 kg lighter than database median (26.5 kg) - easier handling during installation
  • #12102 for efficiency, #8778 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 390 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.10 % Weak Segment median 21.26%
Vmpp · Impp 46.25 V · 8.48 A Operating point at max power
Voc · Isc 54.33 V · 8.96 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1736×1122×35 mm · 1.95 m² of roof
Weight 21.0 kg Typical Typical · median 22.3 kg
Cells 80 Monocrystalline
Coefficient Pmax -0.340 %/°C Typical median -0.300 of its segment
Coefficient Voc · Isc -0.262 · 0.037 %/°C
Product warranty 15 years Hardware defects only
Performance warranty 25 years Weak bottom 19% · median 30 yrs
End-of-warranty output 80.0 % Equals 297 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
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.340 %/°C against a segment median of -0.300
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Heckert Solar NEMO 4.2 80M BLACK 390 390 W 20.10% -0.340 21.0 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg +50 W, cooler, +3.0 pp
GKA210M340W 340 W 23.00% - 16.2 kg -50 W, +2.9 pp, +5 yr warranty
GKA210M360W 360 W 23.00% - 16.2 kg Lighter, +2.9 pp, +5 yr warranty
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg Lighter, +2.9 pp, +5 yr warranty
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg Lighter, +2.9 pp, +5 yr warranty
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg Lighter, +2.9 pp, +5 yr warranty
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg Lighter, +2.9 pp, +5 yr warranty
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg +50 W, cooler, +2.8 pp
NEMO® 4.1 80 M 385 385 W 19.80% -0.343 21.0 kg -0.3 pp
NeMo® 4.2 80 M 390 392 W 20.10% -0.340 21.0 kg Very close match
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +120 W, cooler, +4.9 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +105 W, cooler, +4.7 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +115 W, cooler, +4.6 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +100 W, cooler, +4.4 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +110 W, cooler, +4.4 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +110 W, cooler, +4.4 pp

Found 56 panels of the same or similar size to this one, within ±10 mm. See them here Found 1942 panels of the same or similar size to this one, within ±25 mm. See them here Found 3396 panels of the same or similar size to this one, within ±50 mm. See them here Found 3974 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is the maximum power output of the NeMo 4.2 80M Black panel and who is it best suited for?
Modules in the NeMo 4.2 80M Black series reach up to 405 Wp. This makes them a strong fit for single-family homes, where both efficiency and limited roof space matter. Thanks to half-cut G12 cells with 12 busbars, the panel makes efficient use of available surface area, delivering higher energy yield per module than older cell designs.
Does the black color of the NeMo 4.2 80M Black panel affect its performance?
The fully black frame and backsheet are primarily an aesthetic choice, matched to dark roof coverings, but they do result in a slightly higher operating temperature than white-backsheet versions. The manufacturer offsets this with half-cut cell technology, which reduces energy losses and helps maintain stable output even at elevated panel temperatures.
What is microCELL TLS technology, and does it actually extend panel lifespan?
microCELL TLS is Heckert Solar's proprietary method of thermal laser separation of cells, used instead of mechanical cutting. This reduces the risk of microcracks in the silicon that can occur during manufacturing and transport, leading to less power degradation over time. In practice, this means greater resistance to mechanical damage and more stable system performance throughout the panel's service life.
Are NeMo 4.2 80M Black panels suitable for coastal installations or agricultural buildings?
Yes, the module holds IEC 61701 certification for salt mist corrosion resistance and IEC 62716 for ammonia resistance, confirming its suitability for both coastal areas exposed to salty air and agricultural settings where ammonia fumes from livestock are present. This level of resistance is uncommon in standard panels within this price class.
What warranty covers the NeMo 4.2 80M Black panels, and what exactly does it include?
The manufacturer provides a 15-year product warranty covering material and workmanship defects, plus a 25-year linear performance warranty guaranteeing a minimum power output level over time. This is standard for premium panels and gives investors confidence that the installation will deliver predictable energy returns throughout its operational life.
Are Heckert Solar NeMo 4.2 80M Black panels manufactured in Germany, and does that affect quality?
Yes, production takes place exclusively in Germany, using electricity generated by the manufacturer's own PV installations. This means strict quality control at every production stage and compliance with rigorous European environmental standards, a factor many buyers consider a real quality advantage rather than just a marketing point when choosing premium panels.
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