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MWG Brand review

MWG-400M

400 Wp Monocrystalline
ComparePV verdict

Middle of its segment, weak in heat

Rank 12,655 of 14,005
Compare panels Datasheet PDF
Power (Wp)
400
Weak · bottom 24%
Efficiency (%)
19.32
Weak · bottom 11%
Density (Wp/m²)
197.6
Weak · bottom 16%
Temp (%/°C)
-0.390
Weak · bottom 2%
Weight (kg)
24.0
Weak · 1.5 kg above median
Warranty (yrs)
25
Weak · bottom 19%

The MWG Mono series by MW Green Power comprises photovoltaic modules built on a monocrystalline structure, distinguished by high long-term stability and robust construction suited for both stationary and off-grid installations. The low-iron, UV-resistant tempered glass effectively protects the cells against degradation caused by solar radiation and adverse weather conditions, directly translating into the durability of the entire installation. The modules are covered by an extensive warranty package - 5/10/25-year warranty - guaranteeing at least 90% power retention during the first decade and 80% over the following years of operation. The frame, made of anodized aluminum alloy, facilitates installation and ensures mechanical resistance even under demanding conditions. The series works excellently with MPPT charge controllers, enabling maximum utilization of available solar energy. The ability to connect modules in series and parallel gives installers considerable design flexibility. This solution is aimed primarily at off-grid power systems, mini power plants, and power supply for electronic systems - applications where reliability and proven quality, backed by IEC, TUV, and CE certifications, are essential.

Ranking

6,519 panels in the 300-500 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 19.32% 21.30% Weak · bottom 11% 12,790
Power density 197.6 212.6 Weak · bottom 16% 12,443
Temperature coefficient -0.390 -0.300 Weak · bottom 2% 13,579
Weight per kWp 60.0 53.2 Weak · bottom 15% 12,326
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

4 positive · 7 caution
Best for

Off-grid and residential.

Not ideal for

Hot climates, tight roof space and weight-limited structures.

Watch-outs
-0.390 %/°C temperature coefficient

Bottom 2% of the 300-500 W band, against a median of -0.300. Ranked 13,579th in the whole database.

19.32% module efficiency

Bottom 11% of the 300-500 W band, against a median of 21.30%.

60.0 kg per kWp

Bottom 15% of the 300-500 W band, against a median of 53.2.

What owners get
Robust mechanical build

Low-iron, UV-resistant tempered glass combined with an anodized aluminum alloy frame delivers strong mechanical durability and limits cell degradation from solar exposure, which matters for installations facing harsh weather conditions.

Extensive 25-year warranty package

The 25-year power warranty guaranteeing at least 90% output through the first decade and 80% thereafter is comparable to Tier-1 manufacturer offerings, and is further backed by IEC, TUV, and CE certifications.

MPPT-friendly installation flexibility

Full compatibility with MPPT charge controllers plus support for series and parallel wiring makes this series convenient for designing off-grid systems, mini power plants, and electronics power supplies.

Competitive monocrystalline efficiency

Efficiency of 19.32-20.12% clearly outperforms the comparable DMEGC GH400M10T-B48HST (15.48%) and sits close to the Heliene 108HC M10 SL All Black (20.5%) at the same 400 Wp maximum power.

Trade-offs
Series discontinued

MWG Mono has been discontinued, meaning limited availability of warranty service, spare parts, and difficulty sourcing matching modules to extend existing installations in the future.

Not a Tier-1 (BNEF) manufacturer

MW Green Power does not appear on BloombergNEF's Tier-1 bankable manufacturer list, unlike comparable brands such as Heliene or Meyer Burger, which can complicate bank financing for larger commercial projects.

Short product warranty on base variant

Product warranty ranges from 5 to 10 years depending on the variant - the 5-year lower bound is clearly below the current market standard for mono modules, where premium manufacturers typically offer 10-15 years on manufacturing defects.

Efficiency below premium HJT segment

Maximum efficiency of 20.12% trails heterojunction-based modules such as the Meyer Burger White (21.7% at the same 400 Wp power), translating to lower energy yield for a comparable installation area.

Notes from the database
  • At 19.3% efficiency, this panel is 2.5pp below the database median of 21.8%
  • 197.6 W/m² power density is 20.5 W/m² below database median (218.1 W/m²) - requires larger installation area
  • At -0.39%/°C, loses 0.09pp more power per degree than database median (-0.30%/°C)
  • At 24.0 kg, this panel is 2.5 kg lighter than database median (26.5 kg) - easier handling during installation
  • In the top 91% for efficiency among all N-type panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 400 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.32 % Weak Segment median 21.30%
Vmpp · Impp 41.33 V · 9.68 A Operating point at max power
Voc · Isc 49.97 V · 10.25 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 2020×1002×40 mm · 2.02 m² of roof
Weight 24.0 kg Weak Weak · 1.5 kg above median
Coefficient Pmax -0.390 %/°C Weak bottom 2% of its segment
Coefficient Voc · Isc -0.290 · 0.050 %/°C
NOCT 47 °C At 800 W/m², 20 °C ambient
Product warranty 10 years Hardware defects only
Performance warranty 25 years Weak bottom 19% · median 30 yrs
End-of-warranty output 80.0 % Equals 309 W guaranteed
Degradation 2.50 → 0.70 % First year, then annual

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
-0.390 %/°C against a segment median of -0.300
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
MWG MWG-400M 400 W 19.32% -0.390 24.0 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg Cooler, +3.8 pp, +5 yr warranty
JST-EDMH-(445-465)W-TD (450W class) 450 W 23.05% -0.300 20.5 kg +50 W, cooler, +3.7 pp
QNN182-HG450-54 450 W 23.04% -0.290 24.0 kg +50 W, cooler, +3.7 pp
HY440-N108BDD 450 W 23.04% -0.300 23.5 kg +50 W, cooler, +3.7 pp
NLBK-27-450 450 W 23.04% -0.300 22.9 kg +50 W, cooler, +3.7 pp
RS41-450NBG-E3 450 W 23.04% -0.290 24.5 kg +50 W, cooler, +3.7 pp
MS480NC-HJTPBFT 480 W 22.10% -0.260 23.0 kg +80 W, cooler, +2.8 pp
MS475NC-HJTPBFT 475 W 21.90% -0.260 23.0 kg +75 W, cooler, +2.6 pp
430W 430 W 21.62% -0.350 22.0 kg Cooler, +2.3 pp, +5 yr warranty
MS470NC-HJTPBFT 470 W 21.60% -0.260 23.0 kg +70 W, cooler, +2.3 pp
LR4-72HPH-465M 465 W 21.40% -0.340 24.3 kg +65 W, cooler, +2.1 pp
MS465NC-HJTPBFT 465 W 21.40% -0.260 23.0 kg +65 W, cooler, +2.1 pp

Found 39 panels of the same or similar size to this one, within ±10 mm. See them here Found 181 panels of the same or similar size to this one, within ±25 mm. See them here Found 298 panels of the same or similar size to this one, within ±50 mm. See them here Found 816 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the MWG Mono series still available for purchase?
The MWG Mono series by MW Green Power has been discontinued and is no longer actively sold through standard distribution channels. If you need to expand an existing installation or are looking for a replacement, we recommend contacting a distributor directly to check remaining stock or to identify a suitable alternative from the manufacturer's current lineup.
What warranty does the MWG Mono panel come with, and what does it cover?
MWG Mono modules carry a 10-year product warranty and a 25-year linear power output warranty. The manufacturer guarantees at least 90% of rated power during the first decade of operation, and no less than 80% in subsequent years. This is a competitive warranty package for monocrystalline modules in this class, backed by IEC, TUV, and CE certifications.
What systems are MWG Mono 400 Wp panels best suited for?
MWG Mono modules are designed primarily for off-grid autonomous power systems, small-scale PV plants, and installations powering electronic equipment or industrial devices. Their compatibility with MPPT charge controllers ensures maximum energy harvest, making them a practical choice wherever grid access is limited or unavailable.
Do MWG Mono panels feature UV-resistant glass, and does it really affect long-term durability?
Yes, MWG Mono modules use low-iron tempered glass with a UV-resistant coating. This construction significantly reduces cell degradation caused by prolonged solar exposure and harsh weather conditions. In practice, it results in a slower efficiency decline and a longer service life compared to modules using standard glass without a UV barrier.
Can MWG Mono panels be connected in series and parallel configurations when designing an installation?
Yes, the MWG Mono series supports both series connections to increase string voltage and parallel connections to increase current. This gives installers considerable design flexibility when building systems of varying power and configuration. Panel count should always be matched to the voltage and current operating range of the MPPT controller or inverter used.
How do MWG Mono monocrystalline modules differ from polycrystalline panels?
The MWG Mono series uses a monocrystalline cell structure, which delivers higher efficiency and better long-term stability compared to polycrystalline cells. Monocrystalline cells produce more power per unit area, which matters when mounting space is limited. Overall build quality is confirmed by IEC, TUV, and CE certifications covering the entire series.
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