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SG325P vs SA500M (FB) 4 of 18 identical Swap Change panels

Peimar SG325P vs Peimar SA500M (FB)

Peimar
SG325P
325 Wp 16.74 % PERC Incomplete
Open panel page Datasheet PDF
VS
Peimar
SA500M (FB)
500 Wp 21.33 % PERC Incomplete
Open panel page Datasheet PDF
The verdict

SA500M (FB) leads on the differences that matter

The largest is module efficiency: 4.59 pp more efficient. 4 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 14 differences
How alike are they
4 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

14 of 18 parameters
Parameter SG325P SA500M (FB) Difference
Module efficiency 16.74 % 21.33 % 4.59 pp more efficient
Temperature coefficient -0.430 %/°C -0.290 %/°C 0.140 %/°C better in heat
Rated power 325 Wp 500 Wp 175 W more power
Power density 167.4 Wp/m² 213.3 Wp/m² 45.9 Wp/m² higher
Weight per kWp 69.2 kg/kWp 46.8 kg/kWp 22.4 kg/kWp lighter
Product warranty 20 yrs 30 yrs 10 yrs longer
Short-circuit current 9.74 A 14.03 A 4.29 A apart
Module area 1.941 m² 2.344 m² 0.403 m² apart
Current at max power 9.03 A 13.24 A 4.21 A apart
Cell count 72 66 6 cells apart
Open-circuit voltage 44.60 V 46.46 V 1.86 V apart
Dimensions 1957x992x40 mm 2067x1134x35 mm 1957x992x40 mm vs 2067x1134x35 mm
Cell type Polycrystalline Monocrystalline Polycrystalline vs Monocrystalline
Voltage at max power 36.30 V 37.77 V 1.47 V apart
02

What it means on a roof

Thirty years of production
A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year
SG325P
10,904 kWh
SA500M (FB)
16,776 kWh
Lifetime gap
5,872 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario SG325P SA500M (FB)
Standard test conditions 25 °C 100.0% of rated power 325 W 500 W
Cool, bright day 40 °C 93.5% of rated power 304 W 478 W
Typical summer roof 55 °C 87.1% of rated power 283 W 457 W
Hot roof 70 °C 80.7% of rated power 262 W 435 W
03

Full specification

Parameter SG325P SA500M (FB) Difference
Power and efficiency
Rated power 325 Wp 500 Wp +175 W for SA500M (FB)
Module efficiency 16.74 % 21.33 % +4.59 pp for SA500M (FB)
Power density 167.4 Wp/m² 213.3 Wp/m² +45.9 Wp/m² for SA500M (FB)
Open-circuit voltage 44.60 V 46.46 V 1.86 V apart
Voltage at max power 36.30 V 37.77 V 1.47 V apart
Short-circuit current 9.74 A 14.03 A 4.29 A apart
Current at max power 9.03 A 13.24 A 4.21 A apart
Temperature
Temperature coefficient -0.430 %/°C -0.290 %/°C +0.140 %/°C for SA500M (FB)
Mechanical
Dimensions 1957x992x40 mm 2067x1134x35 mm 1957x992x40 mm vs 2067x1134x35 mm
Module area 1.941 m² 2.344 m² 0.403 m² apart
Weight 22.5 kg 23.4 kg Effectively the same
Weight per kWp 69.2 kg/kWp 46.8 kg/kWp -22.4 kg/kWp for SA500M (FB)
Warranty and degradation
Product warranty 20 yrs 30 yrs +10 yrs for SA500M (FB)
Performance warranty 30 yrs 30 yrs Same
Annual degradation - - Neither datasheet publishes this
Technology
Cell technology PERC PERC Same
Cell type Polycrystalline Monocrystalline Polycrystalline vs Monocrystalline
Cell count 72 66 6 cells apart
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#13,521 vs #8,476
SA500M (FB) leads by 5,045 places
Power density
#13,515 vs #8,438
SA500M (FB) leads by 5,077 places
Heat behaviour
#13,847 vs #2,165
SA500M (FB) leads by 11,682 places
Weight
#13,370 vs #1,355
SA500M (FB) leads by 12,015 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#13,109 vs #4,753
SA500M (FB) leads by 8,356 places
05

More useful comparisons

Open the full database
Same series, other bin
Peimar
Peimar SG325P vs Peimar SG330P
One difference: module efficiency
Same manufacturer
Peimar
Peimar SG325P vs Peimar OR10H595MNDB
17 differences, the largest is module efficiency
Same manufacturer
Peimar
Peimar SG325P vs Peimar OR10H450MNDB (FB)
15 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Peimar SG325P or Peimar SA500M (FB)?
According to our database: Peimar SA500M (FB) has higher module efficiency (21.33% vs 16.74%); Peimar SA500M (FB) tolerates heat better (temp coeff -0.290%/°C vs -0.430%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Peimar SG325P and Peimar SA500M (FB)?
Peimar SG325P has a module efficiency of 16.74%, while Peimar SA500M (FB) is 21.33%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Peimar SG325P use vs Peimar SA500M (FB)?
Peimar SG325P uses PERC cells; Peimar SA500M (FB) uses PERC. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.
What is the warranty on Peimar SG325P and Peimar SA500M (FB)?
Peimar SG325P has a 30 years power warranty; Peimar SA500M (FB) has a 30 years power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80-87%). Product (materials) warranties are usually shorter.

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Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate. The thirty-year projection and the temperature scenarios are calculations from those figures, and each states its assumption above.