Gokin GK-5-60HG-505M vs Gokin GK-5-60HG-520M
VS
The verdict
520M leads on the differences that matter
The largest is module efficiency: 0.70 pp more efficient. 16 of 19 comparable parameters are identical.
See all 3 differencesHow alike are they
16
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
3 of 19 parameters
What actually differs
Parameter
505M
520M
Difference
Module efficiency
22.80 %
23.50 %
0.70 pp more efficient
Power density
227.9 Wp/m²
234.7 Wp/m²
6.8 Wp/m² higher
Rated power
505 Wp
520 Wp
15 W more power
02
What it means on a roof
Thirty years of production
Each panel's own declared degradation curve, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
505M
17,076 kWh
520M
17,583 kWh
Lifetime gap
507 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
505M
520M
Standard test conditions
25 °C
100.0% of rated power
505 W
520 W
Cool, bright day
40 °C
96.1% of rated power
485 W
500 W
Typical summer roof
55 °C
92.2% of rated power
466 W
479 W
Hot roof
70 °C
88.3% of rated power
446 W
459 W
03
Full specification
Parameter
505M
520M
Difference
Power and efficiency
Rated power
505 Wp
520 Wp
+15 W for 520M
Module efficiency
22.80 %
23.50 %
+0.70 pp for 520M
Power density
227.9 Wp/m²
234.7 Wp/m²
+6.8 Wp/m² for 520M
Open-circuit voltage
45.10 V
45.42 V
Effectively the same
Voltage at max power
38.00 V
38.30 V
Effectively the same
Short-circuit current
14.11 A
14.29 A
Effectively the same
Current at max power
13.30 A
13.58 A
Effectively the same
Temperature
Temperature coefficient
-0.260 %/°C
-0.260 %/°C
Same
Mechanical
Dimensions
1954x1134x30 mm
1954x1134x30 mm
Same
Module area
2.216 m²
2.216 m²
Same
Weight
23.3 kg
23.3 kg
Same
Weight per kWp
46.1 kg/kWp
44.8 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.35 %/yr
0.35 %/yr
Same
Technology
Cell technology
Back Contact
Back Contact
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
120
120
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#2,714
vs
#716
520M leads by 1,998 places
Power density
#2,788
vs
#854
520M leads by 1,934 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#1,014
vs
#540
520M leads by 474 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#5,902
vs
#4,615
520M leads by 1,287 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Gokin GK-5-60HG-505M or Gokin GK-5-60HG-520M?
According to our database: Gokin GK-5-60HG-520M has higher module efficiency (23.50% vs 22.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Gokin GK-5-60HG-505M and Gokin GK-5-60HG-520M?
Gokin GK-5-60HG-505M has a module efficiency of 22.80%, while Gokin GK-5-60HG-520M is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Gokin GK-5-60HG-505M use vs Gokin GK-5-60HG-520M?
Gokin GK-5-60HG-505M uses Back Contact cells; Gokin GK-5-60HG-520M uses Back Contact. 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 Gokin GK-5-60HG-505M and Gokin GK-5-60HG-520M?
Gokin GK-5-60HG-505M has a 30 years power warranty; Gokin GK-5-60HG-520M 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.
Shop prices: See 2 Gokin offers
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.