Silfab SIL-630 XL vs Silfab SIL-590 XM+
VS
The verdict
9 differences, and they point both ways
The largest is rated power: 40 W more power. 10 of 19 comparable parameters are identical.
See all 9 differencesHow alike are they
10
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
9 of 19 parameters
What actually differs
Parameter
630 XL
590 XM+
Difference
Rated power
630 Wp
590 Wp
40 W more power
Open-circuit voltage
57.49 V
52.50 V
4.99 V apart
Module area
2.793 m²
2.581 m²
0.212 m² apart
Module efficiency
22.56 %
22.80 %
0.24 pp more efficient
Power density
225.6 Wp/m²
228.6 Wp/m²
3.0 Wp/m² higher
Cell count
156
144
12 cells apart
Voltage at max power
48.47 V
44.79 V
3.68 V apart
Weight
29.5 kg
28.5 kg
1.0 kg lighter
Dimensions
2465x1133x35 mm
2278x1133x35 mm
2465x1133x35 mm vs 2278x1133x35 mm
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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
630 XL
21,240 kWh
590 XM+
19,830 kWh
Lifetime gap
1,410 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
630 XL
590 XM+
Standard test conditions
25 °C
100.0% of rated power
630 W
590 W
Cool, bright day
40 °C
95.7% of rated power
603 W
564 W
Typical summer roof
55 °C
91.3% of rated power
575 W
539 W
Hot roof
70 °C
87.0% of rated power
548 W
513 W
03
Full specification
Parameter
630 XL
590 XM+
Difference
Power and efficiency
Rated power
630 Wp
590 Wp
+40 W for 630 XL
Module efficiency
22.56 %
22.80 %
+0.24 pp for 590 XM+
Power density
225.6 Wp/m²
228.6 Wp/m²
+3.0 Wp/m² for 590 XM+
Open-circuit voltage
57.49 V
52.50 V
4.99 V apart
Voltage at max power
48.47 V
44.79 V
3.68 V apart
Short-circuit current
13.66 A
13.91 A
Effectively the same
Current at max power
13.00 A
13.17 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2465x1133x35 mm
2278x1133x35 mm
2465x1133x35 mm vs 2278x1133x35 mm
Module area
2.793 m²
2.581 m²
0.212 m² apart
Weight
29.5 kg
28.5 kg
-1.0 kg for 590 XM+
Weight per kWp
46.8 kg/kWp
48.3 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
25 yrs
25 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.30 %/yr
0.32 %/yr
Effectively the same
Technology
Cell technology
N-type
N-type
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
156
144
12 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#3,899
vs
#2,714
590 XM+ leads by 1,185 places
Power density
#3,867
vs
#2,463
590 XM+ leads by 1,404 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#1,365
vs
#2,190
630 XL leads by 825 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,032
vs
#1,554
630 XL leads by 522 places
05
Open the full database
More useful comparisons
Same series, other bin
Silfab
Silfab SIL-630 XL vs Silfab SIL-640 XL
3 differences, the largest is module efficiency
Same series, other bin
Silfab
Silfab SIL-630 XL vs Silfab SIL-620 XL
3 differences, the largest is module efficiency
Same series, other bin
Silfab
Silfab SIL-590 XM+ vs Silfab SIL-580-XM+-BIFACIAL
3 differences, the largest is module efficiency
Same series, other bin
Silfab
Silfab SIL-590 XM+ vs Silfab SIL-570 XM+ BIFACIAL
4 differences, the largest is module efficiency
Same series, other bin
Silfab
Silfab SIL-590 XM+ vs Silfab SIL-570 XM+
4 differences, the largest is module efficiency
Same series, other bin
Silfab
Silfab SIL-590 XM+ vs Silfab SIL-530 XM
9 differences, the largest is rated power
06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Silfab SIL-630 XL or Silfab SIL-590 XM+?
According to our database: Silfab SIL-590 XM+ has higher module efficiency (22.80% vs 22.56%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Silfab SIL-630 XL and Silfab SIL-590 XM+?
Silfab SIL-630 XL has a module efficiency of 22.56%, while Silfab SIL-590 XM+ is 22.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Silfab SIL-630 XL use vs Silfab SIL-590 XM+?
Silfab SIL-630 XL uses N-type cells; Silfab SIL-590 XM+ uses N-type. 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 Silfab SIL-630 XL and Silfab SIL-590 XM+?
Silfab SIL-630 XL has a 30 years power warranty; Silfab SIL-590 XM+ 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 Silfab SIL-630 XL and Silfab SIL-590 XM+ bifacial panels?
Both Silfab SIL-630 XL and Silfab SIL-590 XM+ 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.
Shop prices: See 2 Silfab 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.