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Maxeon SPR-MAX3-355-BLK
Maxeon Brand review

SPR-MAX3-355-BLK

355 Wp Back Contact
ComparePV verdict

Warranty pick, needs the roof space

Rank 7,070 of 14,129
Compare panels Datasheet PDF
Power (Wp)
355
Weak · bottom 13%
Efficiency (%)
20.10
Weak · bottom 1%
Density (Wp/m²)
200.8
Weak · bottom 1%
Temp (%/°C)
-0.270
Typical · median -0.290
Weight (kg)
19.0
Weak · bottom 10%
Warranty (yrs)
40
Strong · top 7%

The Maxeon 3 series was designed to maximize energy generation from the same roof area - especially when space is limited or the investor wants to minimize the number of modules. A key advantage is the use of IBC (Interdigitated Back Contact) cells, where the metallization is located on the back, allowing the front of the cell to better capture light and eliminating typical losses caused by front conductive strips. In practice, this means high operational efficiency under real-world conditions and more stable production, even in less sunny conditions.

The Maxeon 3 stands out with very low power degradation over time, which translates to longer-lasting savings and greater predictability of the investment's profitability. The robust, metal-based support structure helps to minimize the effects of micro-cracks, resulting in above-average mechanical strength and a lower risk of yield reduction over time. This makes it a good choice for homes, small businesses, and premium installations where longevity and aesthetics without visible busbars are important.

Ranking

82 panels in the segment Back Contact 255-455 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.10% 22.30% Weak · bottom 1% 12,187
Power density 200.8 222.8 Weak · bottom 1% 12,211
Temperature coefficient -0.270 -0.290 Typical 1,318
Weight per kWp 53.5 48.8 Weak · bottom 10% 7,561
Performance warranty 40 yrs 30 yrs Strong · top 7% 1
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 6 caution
Best for

Residential, commercial and hot-climate.

Not ideal for

Roofs where every square metre has to count, tight roof space and weight-limited structures.

Strengths
40 year performance warranty

Top 7% of the Back Contact 255-455 W segment, against a median of 30 yrs. Ranked 1st in the whole database.

Watch-outs
200.8 watts per square metre

Bottom 1% of the Back Contact 255-455 W segment, against a median of 222.8. Ranked 12,211th in the whole database.

20.10% module efficiency

Bottom 1% of the Back Contact 255-455 W segment, against a median of 22.30%. Ranked 12,187th in the whole database.

53.5 kg per kWp

Bottom 10% of the Back Contact 255-455 W segment, against a median of 48.8. Ranked 7,561st in the whole database.

What owners get
Back Contact cells without busbars

IBC technology (rear-side metallization) eliminates losses from front conducting ribbons, delivering up to 22.7% efficiency - clearly above peers: Silfab Elite (21.9%), EGing STAR Pro (22.02%) and Boviet GAMMA (19.8%).

Industry-leading low power degradation

Maximum annual degradation is just 0.25% (min. 98% output in year 1), meaning approximately 90% of original power output is retained after 40 years - substantially better than the typical 0.4-0.5%/year seen in PERC panels.

40-year product and power warranty

Both product and power warranties run for 40 years, well beyond the industry-standard 25-30 years offered by most Tier-1 manufacturers, including the listed peer comparables.

Robust mechanical construction

The metal foundation supporting each cell reduces the risk of microcracks and associated output degradation, improving durability under harsh conditions such as snow load, wind, and thermal cycling.

Premium aesthetics with no visible busbars

The uniform black appearance with no front conducting ribbons makes the series an attractive choice for residential and commercial installations where roof aesthetics matter.

Trade-offs
Significant manufacturer financial risk

In April 2026, Maxeon Solar Technologies filed for judicial management (restructuring) in a Singapore court, and the company stopped reporting quarterly earnings as of Q1 2025. Independent models estimate bankruptcy probability above 80%, raising real questions about the long-term enforceability of the 40-year warranty.

No bifacial technology

The series does not offer bifacial modules (is_bifacial: false), forgoing a potential 5-15% additional yield from albedo gain available in competing premium products, particularly relevant for elevated or ground-mount installations.

Pricing at the top of the market

Maxeon is positioned among the most expensive manufacturers on the market, with panel prices around $1.5-$3/W versus an average of $1.05-$1.75/W - a premium that is hard to fully justify economically given peers with comparable efficiency, such as Silfab Elite (21.9%).

Notes from the database
  • Efficiency of 20.1% is 1.1pp below the Back Contact 0-400W median (21.2%)
  • 200.8 W/m² power density is 11.7 W/m² below Back Contact 0-400W median (212.5 W/m²) - requires larger installation area
  • Temperature coefficient of -0.27%/°C matches the Back Contact 0-400W median
  • Ranked #12187 out of 14129 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 355 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.10 % Weak Segment median 22.30%
Vmpp · Impp 60.70 V · 5.85 A Operating point at max power
Voc · Isc 75.30 V · 6.27 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1690×1046×40 mm · 1.77 m² of roof
Weight 19.0 kg Weak Weak · bottom 10%
Cells 104 · Back Contact Monocrystalline
Coefficient Pmax -0.270 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.236 · 0.058 %/°C
Product warranty 40 years Hardware defects only
Performance warranty 40 years Strong top 7% · median 30 yrs
End-of-warranty output 88.2 % Equals 322 W guaranteed
Degradation 2.00 → 0.25 % 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
-0.270 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Maxeon SPR-MAX3-355-BLK 355 W 20.10% -0.270 19.0 kg You are here
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Lighter, +3.0 pp, -15 yr warranty
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Lighter, +3.0 pp, -15 yr warranty
GKA210M320W 320 W 23.00% - 16.2 kg -35 W, +2.9 pp, -10 yr warranty
GKA210M340W 340 W 23.00% - 16.2 kg Lighter, +2.9 pp, -10 yr warranty
GKA210M360W 360 W 23.00% - 16.2 kg Lighter, +2.9 pp, -10 yr warranty
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg +25 W, +2.9 pp, -10 yr warranty
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +45 W, +2.9 pp, -10 yr warranty
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg +45 W, +2.9 pp, -10 yr warranty
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg +25 W, +2.9 pp, -10 yr warranty
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg +45 W, +2.5 pp
SPR-MAX3-370-COM 370 W 20.90% -0.270 19.0 kg +15 W, +0.8 pp, -15 yr warranty
SPR-MAX3-375-BLK 375 W 21.20% -0.270 19.0 kg +20 W, +1.1 pp
SPR-MAX3-380-COM 380 W 21.50% -0.270 19.0 kg +25 W, +1.4 pp
SPR-MAX3-390-COM 390 W 22.10% -0.270 19.0 kg +35 W, +2.0 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +140 W, +4.7 pp, -10 yr warranty
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +135 W, +4.4 pp, -10 yr warranty

Found 6 panels of the same or similar size to this one, within ±10 mm. See them here Found 10 panels of the same or similar size to this one, within ±25 mm. See them here Found 230 panels of the same or similar size to this one, within ±50 mm. See them here Found 4193 panels of the same or similar size to this one, within ±100 mm. See them here

About the Maxeon 3 series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

What does the Maxeon 3 warranty cover and how long does it last?
The Maxeon 3 comes with a 40-year comprehensive warranty - one of the longest in the solar industry. It covers both product defects and power output: minimum warranted output in year one is 98% of rated power, with a maximum annual degradation of just 0.25%. After 40 years, the panel should still deliver approximately 90% of its original 430 Wp rating. The full 40-year warranty requires product registration with Maxeon.
What is IBC cell technology in the Maxeon 3 and is it worth the premium price?
In IBC (Interdigitated Back Contact) cells, all metal contacts are moved to the rear of the module, leaving the front surface fully exposed to sunlight without any busbar shading losses. The result is module efficiency up to 22.7% - significantly higher than typical PERC or TOPCon panels in the same power class. For rooftop installations with limited area, this means more kWh per square meter without adding extra modules. The absence of visible busbars on the front also gives the panel a clean, premium aesthetic.
Is the Maxeon 3 430 Wp a good choice for a small roof with limited space?
Yes, this is one of the main reasons installers and homeowners choose this series. With 22.7% efficiency, the Maxeon 3 430 Wp achieves the same system output with fewer modules compared to standard 20-21% panels. The module weighs 21.2 kg and has compact dimensions, making it manageable on pitched roofs with restricted space. For the end customer, fewer modules means lower balance-of-system (BoS) costs and simpler installation logistics.
How does the Maxeon 3 perform in low-light or overcast conditions?
IBC cells deliver strong performance at low irradiance levels due to the elimination of front-contact shading losses, which allows more diffuse light to reach the active cell area. This is particularly relevant in Central European climates with frequent cloud cover in autumn and winter. Maxeon highlights consistent annual energy yield as a key advantage of the series, meaning real-world production holds closer to STC-rated values than many competing modules.
How does the low degradation rate of the Maxeon 3 affect long-term savings?
The Maxeon 3 degrades at a maximum of 0.25% per year - two to three times lower than standard PERC modules at 0.5-0.7% annually. For a 10 kWp system, this translates to hundreds of additional kWh per year after 25 years, and thousands of dollars in extra savings over the full 40-year warranty period. Lower degradation also means more predictable LCOE calculations and a stronger ROI case for premium residential and commercial installations.
Is the Maxeon 3 a bifacial panel and does it benefit from a white backsheet or elevated mounting?
No, the Maxeon 3 is a monofacial panel - it does not feature bifacial cell technology. The rear surface is opaque and does not collect reflected albedo light from the ground or roof membrane. There is no benefit from using a white backsheet or tilt-optimized mounting to exploit bifacial gain. The panel is designed to deliver class-leading efficiency from its front surface alone, making it ideal for standard pitched-roof and ground-mount installations where single-sided performance is the priority.
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