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Powitt Solar Brand review

PW-66M630HM10L-BD

630 Wp N-type Bifacial 86%
ComparePV verdict

Efficiency leader, no clear weak spot

Rank 1,630 of 14,005
Compare panels Datasheet PDF
Power (Wp)
630
Typical for its class
Efficiency (%)
23.32
Strong · top 16%
Density (Wp/m²)
233.2
Strong · top 18%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
32.5
Typical · median 32.5 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Powitt Solar MONO MODULE N-TYPE Bifacial Dual Glass solar panel series sets new efficiency standards thanks to the use of advanced N-Type TOPCon cell technology. Unlike traditional solutions, these modules almost completely eliminate the negative phenomenon of light-induced degradation (LID), which guarantees investors stable energy yields for decades. A key feature of the series is the Bifacial double-sided design, which allows for additional power generation from radiation reflected from the ground, making it particularly cost-effective for ground-mounted farms or bright roof surfaces. The use of a Dual Glass structure, meaning double tempered glass, significantly increases the mechanical resistance of the panels to extreme weather conditions such as hail, strong winds, or snow loads, while simultaneously protecting the cells from micro-cracks and chemical corrosion. This product is dedicated to demanding business investors and owners of single-family homes who prioritize maximizing self-consumption and long-term savings. Thanks to low temperature coefficients, the panels maintain high efficiency even on hot days, which sets them apart from standard competition. Choosing this series is an investment in maximum durability and efficiency, backed by a long-term power warranty, which solves the problem of premature component aging and ensures the lowest levelized cost of energy (LCOE).

Ranking

359 panels in the segment N-type 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.32% 22.77% Strong · top 16% 973
Power density 233.2 227.7 Strong · top 18% 1,003
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 51.6 52.7 Typical 4,960
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

7 positive · 2 caution
Best for

Residential, commercial, utility-scale and hot-climate.

Strengths
23.32% module efficiency

Top 16% of the N-type 600-650 W segment, against a median of 22.77%.

233.2 watts per square metre

Top 18% of the N-type 600-650 W segment, against a median of 227.7.

What owners get
Highest efficiency in peer segment

Efficiency of 23.14-23.69% exceeds direct competitors: REC Alpha Pro M (22.5%) and Jetion JT SRt(B) (22.9%), and matches the top Luxen N5 series. Higher efficiency translates into fewer modules needed to reach the same installation capacity.

N-type TOPCon cell technology

N-type TOPCon cells nearly eliminate light-induced degradation (LID) and have a lower temperature coefficient than older PERC cells, ensuring a more stable energy yield in hot climates and over the full operational lifetime.

Bifacial dual-glass construction

The dual-sided design allows additional energy harvest from reflected (albedo) radiation, particularly valuable on light-colored roofing or ground-mount farms, while the tempered dual-glass structure significantly boosts mechanical resistance to hail, wind, and snow load versus back-sheet modules.

High per-unit power up to 640 Wp

Power output up to 640 Wp matches the strongest peer models (Luxen N5 640 Wp, REC Alpha Pro M 640 Wp, Jetion JT SRt(B) 640 Wp), reducing the module count, cabling, and mounting structure required per kWp of installed capacity.

30-year linear power warranty

A 30-year linear power warranty exceeds the standard 25-year terms common in this segment, lowering long-term risk of energy output decline and supporting a lower levelized cost of energy (LCOE).

Trade-offs
Manufacturer not BNEF Tier 1 listed

Powitt Solar does not hold BNEF (Bloomberg New Energy Finance) Tier 1 Bankable status, unlike some reputable competitors in this segment, which can complicate non-recourse bank financing for large commercial projects and limit insurer acceptance.

Shorter product warranty than market leader REC

The 15-year product warranty is notably shorter than REC's 25-year product warranty for the Alpha Pro M series, which may be a meaningful factor when comparing total service risk in long-term projects.

Notes from the database
  • At 23.3% efficiency, this panel is 0.6pp above typical N-type 600-650W modules (median: 22.8%)
  • At 233.2 W/m² power density, this panel generates 5.5 W/m² more 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
  • Bifaciality factor of 86% can add 4-13% extra yield with reflective mounting surface
  • In the top 7% for efficiency among all N-type panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 630 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.32 % Strong Segment median 22.77%
Vmpp · Impp 41.60 V · 15.16 A Operating point at max power
Voc · Isc 48.80 V · 16.20 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2382×1134×30 mm · 2.70 m² of roof
Weight 32.5 kg Typical Typical · median 32.5 kg
Cells 132 · N-type Monocrystalline
Bifaciality 86 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.050 %/°C
NOCT 41 °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 551 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Powitt Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 630 Wp appear here. The rest cover the whole series.

Linear Performance Warranty (15 Year Product Warranty / 30 Year Linear Power Warranty) Linear Performance Warranty (15 Year Product Warranty / 30 Year Linear Power Warranty) Whole series I-V Curve (630W) I-V Curve (630W) 630 W P-V Curve (630W) P-V Curve (630W) 630 W

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
Powitt Solar PW-66M630HM10L-BD 630 W 23.32% -0.290 32.5 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +1.9 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +50 W, lighter, +1.9 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +45 W, lighter, +1.7 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +1.7 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +40 W, lighter, +1.5 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +40 W, lighter, +1.5 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +1.5 pp
PW-66M625HM10L-BD 625 W 23.14% -0.290 32.5 kg Very close match
PW-66M635HM10L-BD 635 W 23.51% -0.290 32.5 kg Very close match
PW-66M640HM10L-BD 640 W 23.69% -0.290 32.5 kg +10 W, +0.4 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +70 W, cooler, +1.7 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +65 W, cooler, +1.6 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +40 W, cooler, +1.5 pp

Found 1119 panels of the same or similar size to this one, within ±10 mm. See them here Found 1125 panels of the same or similar size to this one, within ±25 mm. See them here Found 1236 panels of the same or similar size to this one, within ±50 mm. See them here Found 1917 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How do Powitt Solar MONO MODULE N-TYPE Bifacial Dual Glass panels differ from standard P-Type PERC modules?
The key difference is N-type TOPCon cell technology instead of conventional P-type PERC. N-type cells nearly eliminate Light Induced Degradation (LID), ensuring more stable energy yields throughout the module's lifetime. The bifacial design enables power generation from both sides of the panel, while the Dual Glass structure provides superior protection against moisture ingress and microcracks compared to a standard polymer backsheet.
Are Powitt Solar 640 Wp bifacial panels a good choice for a ground-mounted system?
Yes, the bifacial design is especially advantageous in ground-mounted systems. The rear glass captures albedo radiation reflected from the ground surface, which — depending on mounting height and surface reflectivity — can boost energy output by several percentage points versus a monofacial module. The 640 Wp peak power also means fewer modules are required for large-scale installations, directly reducing BoS costs.
What warranty does the Powitt Solar N-TYPE Bifacial Dual Glass series carry?
Powitt Solar provides a 15-year product warranty covering manufacturing and material defects, plus a 30-year linear power warranty. Thanks to the low annual degradation rate typical of N-type TOPCon technology, modules are expected to retain well above 80% of rated power after 30 years, delivering a highly competitive LCOE over the full system lifetime.
What are the real-world advantages of Dual Glass construction over a standard backsheet?
Dual Glass replaces the polymer backsheet with a second tempered glass sheet, essentially eliminating water vapor transmission and protecting cells from corrosion and delamination for decades. The glass also handles higher mechanical loads from hail, wind pressure, and snow accumulation than standard backsheets. The slight weight increase is offset by significantly better long-term durability and electrical stability of the module.
Do Powitt Solar N-Type 640 Wp panels lose significant output on hot summer days?
All PV modules experience power loss at elevated temperatures, but N-type TOPCon cells have a lower temperature coefficient than P-type PERC modules. In practice this means less output degradation when cell temperatures exceed 50-70°C on hot sunny days — a meaningful advantage for rooftop installations with limited airflow or utility-scale ground-mount systems in high-irradiance locations.
How many Powitt Solar 640 Wp modules do I need to build a 10 kWp system?
At 640 Wp per module, 16 panels yield exactly 10.24 kWp. The system designer will fine-tune module count to match the inverter's MPPT input range and available area. The high per-module wattage means fewer modules than with popular 400-500 Wp formats, which directly lowers BoS costs — mounting hardware, DC cabling, and installation labor — for the same system output.
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