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MST12665HP3G

665 Wp PERC Bifacial 500%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 5,270 of 14,005
Compare panels Datasheet PDF
Power (Wp)
665
Typical for its class
Efficiency (%)
21.40
Typical · median 21.25%
Density (Wp/m²)
214.1
Typical · median 212.5
Temp (%/°C)
-0.340
Typical · median -0.340
Weight (kg)
38.7
Weak · 4.2 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The Mission Solar PERC Bifacial 132HC series is a range of modules designed to maximize energy yield in situations where every square meter counts. The use of glass-glass construction and bifacial operation allows for the effective utilization of reflected light from the ground, which significantly increases energy production in ground-mounted, flat-roofed, and carport installations. The PERC cells in a half-cut configuration help to minimize losses in partially shaded conditions and improve stability under variable sunlight. This solution is ideal for investors and installers who want to combine high power density with durability in demanding environments, from PV farms to commercial projects. Another key feature is focus on resistance to external conditions, which simplifies long-term planning and reduces the risk of downtime. Compared to typical monofacial modules, this series "earns" more from the appropriate albedo and mounting geometry, making it easier to extract more energy from the same surface.

Ranking

320 panels in the segment PERC 650-700 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.40% 21.25% Typical 8,323
Power density 214.1 212.5 Typical 8,250
Temperature coefficient -0.340 -0.340 Typical 8,778
Weight per kWp 58.2 52.3 Weak · bottom 19% 11,622
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 4 caution
Best for

Commercial, utility-scale and shaded-installations.

Not ideal for

Weight-limited structures.

Watch-outs
58.2 kg per kWp

Bottom 19% of the PERC 650-700 W segment, against a median of 52.3.

What owners get
US manufacturing, IRA benefits

Modules are produced at the San Antonio, TX facility, qualifying for the federal Section 45X production tax credit and supporting the domestic content bonus adder for US commercial and utility-scale projects, while being exempt from AD/CVD tariffs applied to Chinese-origin components.

30-year power warranty

The manufacturer offers a 30-year linear power warranty, while most competing bifacial PERC lines on the market still standardly offer 25 years - the longer term simplifies LCOE planning for institutional investors.

Efficiency on par with segment leaders

Efficiency of 21.2-21.6% and power up to 670 Wp put the series on par with the best comparable PERC bifacial products - Hiwatt HW-M12/132H (670 Wp, 21.6%), Techwise Summit Series, and Resun RS9H-M (both 670 Wp, 21.57%).

Glass-glass build resists hail

Panels passed hail resistance testing at 25 mm diameter at 23 m/s and hold UL 61730 certification, making them a suitable choice for ground-mount PV farms, carports, and other high-exposure installations.

US-based service support

Warranty and after-sales support handled locally in the US shortens response times and simplifies claims logistics compared to Asian manufacturers servicing the market remotely.

Trade-offs
No bankable Tier 1 status

The manufacturer does not hold bankable Tier 1 status (BNEF), which can complicate financing for large commercial and utility-scale projects where banks and funds require modules from Tier 1 lists.

PERC technology, not N-type

The series is built on older PERC cells, while Mission Solar itself already offers a bifacial N-Type 132HC line rated up to 23.0% efficiency - PERC lags behind N-type in areas such as LID degradation and long-term power stability.

Limited market track record

The series launched in 2025, so there is no independent, multi-year field data yet confirming actual power degradation over a timeframe approaching the stated 30-year warranty.

Notes from the database
  • At 21.4% efficiency, this panel is on par with typical PERC 650-700W modules
  • At 214.1 W/m² power density, roof space requirements are typical for PERC 650-700W panels
  • Temperature coefficient of -0.34%/°C matches the PERC 650-700W median
  • At 38.7 kg (4.2 kg above PERC 650-700W median of 34.5 kg), requires checking roof load capacity
  • #8323 for efficiency, #8778 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 665 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.40 % Typical Segment median 21.25%
Vmpp · Impp 38.30 V · 17.39 A Operating point at max power
Voc · Isc 46.10 V · 18.50 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×35 mm · 3.11 m² of roof
Weight 38.7 kg Weak Weak · 4.2 kg above median
Cells 132 · PERC Monocrystalline
Bifaciality 500 % Rear output as a share of front
Coefficient Pmax -0.340 %/°C Typical median -0.340 of its segment
Coefficient Voc · Isc -0.250 · 0.040 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 85.0 % Equals 565 W guaranteed
Degradation 2.00 → 0.45 % 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
-
With bifacial gain
-

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

Heat losses
-0.340 %/°C against a segment median of -0.340
-
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
Mission Solar MST12665HP3G 665 W 21.40% -0.340 38.7 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +3.8 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Cooler, lighter, +3.8 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg Cooler, lighter, +3.6 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +3.6 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg Cooler, lighter, +3.6 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg Cooler, lighter, +3.5 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +3.4 pp
MST12660HP3G 660 W 21.20% -0.340 38.7 kg Very close match
MST12670HP3G 670 W 21.60% -0.340 38.7 kg +0.2 pp
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +140 W, cooler, +3.7 pp
AIKO-A800-GRH78Dw 800 W 24.90% -0.260 39.8 kg +135 W, cooler, +3.5 pp
AIKO-A795-GRH78Dw 795 W 24.80% -0.260 39.8 kg +130 W, cooler, +3.4 pp
AIKO-A790-GRH78Dw 790 W 24.60% -0.260 39.8 kg +125 W, cooler, +3.2 pp
TSM-NEG21C.20Q-760 760 W 24.50% -0.260 38.3 kg +95 W, cooler, +3.1 pp
AIKO-A785-GRH78Dw 785 W 24.40% -0.260 39.8 kg +120 W, cooler, +3.0 pp
GK-4-78HGBD-780M 780 W 24.30% -0.260 38.7 kg +115 W, cooler, +2.9 pp

Found 1390 panels of the same or similar size to this one, within ±10 mm. See them here Found 1400 panels of the same or similar size to this one, within ±25 mm. See them here Found 1400 panels of the same or similar size to this one, within ±50 mm. See them here Found 1432 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 Mission Solar PERC Bifacial 132HC panels?
Mission Solar PERC Bifacial 132HC panels reach a peak power of up to 670 Wp. The 132 half-cut cell layout reduces resistive losses and improves shade tolerance. The bifacial glass-glass construction additionally harvests energy from light reflected off the ground surface, delivering higher annual energy yield compared to a monofacial module of the same nominal power rating.
How long is the power output warranty on Mission Solar PERC Bifacial 132HC modules?
Mission Solar provides a 30-year linear power warranty for the PERC Bifacial 132HC series — longer than the 25-year standard common across the industry. The product warranty covering manufacturing defects runs for 12 years. The extended linear warranty directly improves LCOE calculations for utility-scale and commercial PV projects planned over the full service life.
Is Mission Solar a Tier 1 manufacturer, and where are PERC Bifacial 132HC modules made?
Mission Solar Energy is not classified as a Tier 1 manufacturer on Bloomberg NEF or similar lists. However, PERC Bifacial 132HC modules are produced at the company's San Antonio, Texas facility with 1 GW of manufacturing capacity. That origin is a meaningful advantage for projects requiring Buy American Act compliance or domestic-content bonuses under the Inflation Reduction Act.
Are Mission Solar PERC Bifacial 132HC panels suitable for flat roofs or carport structures?
Yes, the PERC Bifacial 132HC series is particularly well-matched to flat roofs and carports. In both applications, the surface below — concrete, roofing membrane, or parking pavement — reflects light onto the rear side of the module, activating bifacial energy gain. The glass-glass construction also provides superior moisture resistance and UV stability, which matters for horizontal or low-tilt installations exposed to the elements.
What advantage does glass-glass construction offer in PERC Bifacial 132HC modules over a standard backsheet design?
Replacing the polymer backsheet with a second glass layer improves resistance to moisture ingress, PID (Potential Induced Degradation), and UV-induced degradation, resulting in a lower annual power degradation rate. The practical outcome is better power retention throughout the full 30-year warranty period and reduced risk of downtime caused by backsheet delamination or cracking.
How much more energy does the bifacial PERC 132HC generate compared to a comparable monofacial module?
Bifacial gain depends on ground albedo and mounting geometry. In typical ground-mount installations with light-colored surfaces or carport applications, bifacial PERC modules can generate 5% to 15% more energy than monofacial counterparts of the same nominal power. On dark-colored sloped roofs, the bifacial effect is negligible and should be excluded from energy yield estimates.
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