Skip to main content
KDM Kingdom Solar Brand review

KD-M440-108-N

440 Wp N-type
ComparePV verdict

Space saver, no clear weak spot

Rank 9,343 of 14,005
Compare panels Datasheet PDF
Power (Wp)
440
Strong · top 23%
Efficiency (%)
22.50
Strong · top 10%
Density (Wp/m²)
225.3
Strong · top 9%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
22.0
Typical · median 22.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

The KDM Kingdom Solar series features advanced modules based on Half-Cut cell technology, which effectively minimize internal power losses and improve efficiency in partial shading conditions. Thanks to the Multi-Busbar (MBB) system, these panels offer better current flow and higher resistance to micro-cracks, which directly translates into the longevity of the entire installation. These solutions address the key issue of performance degradation over time, providing users with stable energy yields even at high ambient temperatures. The design of the KDM Series modules stands out for its excellent mechanical resistance to snow and wind loads, making them an ideal choice for the demanding Polish climate. This offer is dedicated to both individual investors and commercial projects, where the priority is an optimal price-to-quality ratio and reliability for decades. Compared to standard solutions, this series handles diffused light much better, allowing for the maximization of energy self-consumption in buildings. The use of an anti-reflective coating further increases the absorption of sunlight, eliminating losses resulting from light reflection from the glass surface. This is a solid foundation for any modern solar power plant that relies on proven technologies and full investment security.

Ranking

321 panels in the segment N-type 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.50% 21.91% Strong · top 10% 4,222
Power density 225.3 218.3 Strong · top 9% 4,099
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 50.0 51.2 Typical 3,317
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 4 caution
Best for

Residential, commercial and shaded-installations.

Strengths
225.3 watts per square metre

Top 9% of the N-type 400-450 W segment, against a median of 218.3. Ranked 4,099th in the whole database.

22.50% module efficiency

Top 10% of the N-type 400-450 W segment, against a median of 21.91%. Ranked 4,222nd in the whole database.

What owners get
N-type cell technology

N-type cells exhibit significantly lower light-induced degradation (LID <0.5%) compared to standard PERC cells (~2–3% LID), and a better temperature coefficient (typically -0.29/-0.30%/°C) translates into higher annual energy yield, especially during high-temperature summer months.

30-year linear power warranty

The manufacturer provides a 30-year linear power output warranty — a benchmark introduced by top N-type producers that exceeds the older 25-year PERC standard. For residential prosumer installations, this reduces investment risk throughout the full payback period.

Half-cut cells + Multi-Busbar (MBB)

The combination of half-cut cell design (halved internal resistance, reduced hot-spot risk) and MBB architecture (9–12 busbars) lowers power losses under partial shading conditions and reduces thermal stress responsible for micro-crack formation, extending the module's mechanical service life.

22.5% efficiency — competitive in segment

The 22.5% module efficiency places KDM Series on par with Seraphim Nebula (22.53%) and above Lina Energy LEPV 132 Ultra Premium (22.37%) in a direct 440 Wp peer comparison, demonstrating solid power density for a 2021 release.

Trade-offs
Discontinued series

The KDM Series is marked as discontinued (launched 2021). The lack of ongoing production makes it difficult to source identical modules for system expansion or damaged-panel replacement, and availability of original service components (junction boxes, frames) will diminish over time.

Not BNEF Tier-1 / non-bankable

Kingdom Solar does not appear on the BloombergNEF Tier-1 module list, which disqualifies or complicates non-recourse project financing used by banks and infrastructure funds. For commercial and utility-scale PV projects above 50 kWp, this can increase the cost of capital or require additional financial collateral.

Product warranty only 12 years

The product (materials & workmanship) warranty is 12 years, while comparable Tier-1 series in the same price bracket — such as Luxor Solar ECO LINE N-TYPE and Seraphim Nebula — typically offer 15 years. Any mechanical defect or delamination occurring after year 12 falls entirely on the system owner.

Lower efficiency than segment leader

At 22.5%, KDM Series trails the Luxor Solar ECO LINE N-TYPE TOPCON NON-REFLECT (22.86%) by 0.36 percentage points within the same 440 Wp class. For a typical 10 kWp rooftop system (~23 panels) in Polish irradiation conditions (~1,050 kWh/m²/year), this translates to approximately 38–42 kWh of lost annual generation versus the segment leader.

Notes from the database
  • 22.5% module efficiency - 0.6pp better than the N-type 400-450W median of 21.9%
  • 225.3 W/m² power density - 7.0 W/m² more than N-type 400-450W median (218.3 W/m²), more power per roof area
  • At -0.29%/°C, hot weather performance is typical for N-type 400-450W panels
  • Ranked #4222 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 440 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.50 % Strong Segment median 21.91%
Vmpp · Impp 32.81 V · 13.41 A Operating point at max power
Voc · Isc 39.38 V · 13.86 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 22.0 kg Typical Typical · median 22.0 kg
Cells 108 · N-type Monocrystalline
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 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 86.4 % Equals 380 W guaranteed
Degradation 2.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by KDM Kingdom Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 440 Wp appear here. The rest cover the whole series.

KDM Series Linear Performance KDM Series Linear Performance Whole series Temperature Dependence of Isc, Voc, Pmax Temperature Dependence of Isc, Voc, Pmax 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
-

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
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
KDM Kingdom Solar KD-M440-108-N 440 W 22.50% -0.290 22.0 kg You are here
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +50 W, cooler, +2.0 pp
STP-NT11/48QGSF-490 490 W 24.50% -0.260 21.5 kg +50 W, cooler, +2.0 pp
JAT54S40-485/LR 485 W 24.30% -0.260 19.3 kg +45 W, cooler, +1.8 pp
AIKO-A485-MCE54Mw 485 W 24.30% -0.260 21.0 kg +45 W, cooler, +1.8 pp
AIKO-A485-MAH54Mw 485 W 24.30% -0.260 21.5 kg +45 W, cooler, +1.8 pp
GK-5-54HG-485M 485 W 24.30% -0.260 21.0 kg +45 W, cooler, +1.8 pp
ZEUS 3.0+ 108 485WP 485 W 24.30% -0.260 24.2 kg +45 W, cooler, +1.8 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +70 W, cooler, +2.5 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +55 W, cooler, +2.3 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +65 W, cooler, +2.2 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +60 W, cooler, +2.0 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +60 W, cooler, +2.0 pp

Found 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3970 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What cell technology does the KDM Kingdom Solar series use, and what does it mean in practice?
The KDM Kingdom Solar series uses N-type half-cut cells with a Multi-Busbar (MBB) system. N-type cells offer lower light-induced degradation (LID) and better performance at elevated temperatures compared to standard P-type cells. The half-cut design reduces internal resistive losses, while MBB improves current flow and resistance to microcracks, directly extending the service life of the entire PV installation.
How does the KDM Series handle partial shading on a rooftop?
The half-cut cell technology in the KDM Series significantly limits the impact of partial shading on overall module output. Splitting cells in half means that shading one section of the panel does not cause a drastic power drop across the rest of the module. This is especially valuable on rooftops with chimneys, dormers, or nearby trees where some shading is unavoidable.
What warranties are included with KDM Kingdom Solar series panels?
The manufacturer provides a 12-year product warranty and a 30-year linear power warranty for the KDM Series. The 30-year power warranty guarantees the panels will maintain a specified minimum output level throughout that period. Keep in mind that KDM Kingdom Solar is not a Tier 1 manufacturer, which may be relevant when seeking bank financing for larger commercial projects.
Is the KDM Series still available for purchase?
The KDM Series has been discontinued and is no longer in active production. Any remaining availability is limited to existing distributor stock. If you are considering a purchase, check current inventory with your supplier or ask for a recommendation on an actively manufactured equivalent within the KDM Kingdom Solar product lineup.
How will the KDM Series 440 Wp panel perform in cold-climate winter conditions?
The KDM Series 440 Wp module is built to handle demanding weather conditions. Its robust mechanical construction withstands heavy snow loads and strong winds typical of Central European winters. N-type cells maintain better parameters at low temperatures compared to P-type PERC, and the anti-reflective coating improves light absorption under diffuse irradiance on overcast days.
Is the KDM Series a bifacial module — is it worth installing on a ground-mount system?
No, the KDM Series is a monofacial module that harvests energy exclusively from the front surface. It does not benefit from ground-reflected irradiance the way bifacial panels do, so there is no additional energy gain from a ground-mount orientation. For standard rooftop installations this is fully adequate, simpler to engineer, and compatible with conventional BoS mounting systems.
Add to compare