REC REC640AA Pro MG vs REC REC600AA Pro MG
VS
The verdict
REC640AA Pro MG leads on the differences that matter
The largest is module efficiency: 1.40 pp more efficient. 13 of 19 comparable parameters are identical.
See all 6 differencesHow alike are they
13
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
6 of 19 parameters
What actually differs
Parameter
REC640AA Pro MG
REC600AA Pro MG
Difference
Module efficiency
22.50 %
21.10 %
1.40 pp more efficient
Rated power
640 Wp
600 Wp
40 W more power
Power density
225.5 Wp/m²
211.4 Wp/m²
14.1 Wp/m² higher
Weight per kWp
57.5 kg/kWp
61.3 kg/kWp
3.8 kg/kWp lighter
Current at max power
17.26 A
16.67 A
0.59 A apart
Voltage at max power
37.10 V
36.00 V
1.10 V apart
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 (-0.240 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
REC640AA Pro MG
21,744 kWh
REC600AA Pro MG
20,385 kWh
Lifetime gap
1,359 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
REC640AA Pro MG
REC600AA Pro MG
Standard test conditions
25 °C
100.0% of rated power
640 W
600 W
Cool, bright day
40 °C
96.4% of rated power
617 W
578 W
Typical summer roof
55 °C
92.8% of rated power
594 W
557 W
Hot roof
70 °C
89.2% of rated power
571 W
535 W
03
Full specification
Parameter
REC640AA Pro MG
REC600AA Pro MG
Difference
Power and efficiency
Rated power
640 Wp
600 Wp
+40 W for REC640AA Pro MG
Module efficiency
22.50 %
21.10 %
+1.40 pp for REC640AA Pro MG
Power density
225.5 Wp/m²
211.4 Wp/m²
+14.1 Wp/m² for REC640AA Pro MG
Open-circuit voltage
44.90 V
44.20 V
Effectively the same
Voltage at max power
37.10 V
36.00 V
1.10 V apart
Short-circuit current
17.89 A
17.45 A
Effectively the same
Current at max power
17.26 A
16.67 A
0.59 A apart
Temperature
Temperature coefficient
-0.240 %/°C
-0.240 %/°C
Same
Mechanical
Dimensions
2175x1305x30 mm
2175x1305x30 mm
Same
Module area
2.838 m²
2.838 m²
Same
Weight
36.8 kg
36.8 kg
Same
Weight per kWp
57.5 kg/kWp
61.3 kg/kWp
-3.8 kg/kWp for REC640AA Pro MG
Warranty and degradation
Product warranty
30 yrs
30 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.25 %/yr
0.25 %/yr
Same
Technology
Cell technology
HJT
HJT
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
120
120
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#4,222
vs
#9,297
REC640AA Pro MG leads by 5,075 places
Power density
#3,889
vs
#9,213
REC640AA Pro MG leads by 5,324 places
Heat behaviour
#13
vs
#13
Tied - the same position in the database
Weight
#11,246
vs
#12,630
REC640AA Pro MG leads by 1,384 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#504
vs
#1,962
REC640AA Pro MG leads by 1,458 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: REC REC640AA Pro MG or REC REC600AA Pro MG?
According to our database: REC REC640AA Pro MG has higher module efficiency (22.50% vs 21.10%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of REC REC640AA Pro MG and REC REC600AA Pro MG?
REC REC640AA Pro MG has a module efficiency of 22.50%, while REC REC600AA Pro MG is 21.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does REC REC640AA Pro MG use vs REC REC600AA Pro MG?
REC REC640AA Pro MG uses HJT cells; REC REC600AA Pro MG uses HJT. 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 REC REC640AA Pro MG and REC REC600AA Pro MG?
REC REC640AA Pro MG has a 30 years power warranty; REC REC600AA Pro MG 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.
Are REC REC640AA Pro MG and REC REC600AA Pro MG bifacial panels?
Both REC REC640AA Pro MG and REC REC600AA Pro MG are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.
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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.