HT-SAAE HT66-18X(N)-615W vs HT-SAAE HT66-18X(N)-630W
VS
The verdict
630W leads on the differences that matter
The largest is module efficiency: 0.50 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
615W
630W
Difference
Module efficiency
22.80 %
23.30 %
0.50 pp more efficient
Power density
227.7 Wp/m²
233.2 Wp/m²
5.6 Wp/m² higher
Rated power
615 Wp
630 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 (-0.310 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
615W
20,634 kWh
630W
21,138 kWh
Lifetime gap
504 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
615W
630W
Standard test conditions
25 °C
100.0% of rated power
615 W
630 W
Cool, bright day
40 °C
95.3% of rated power
586 W
601 W
Typical summer roof
55 °C
90.7% of rated power
558 W
571 W
Hot roof
70 °C
86.0% of rated power
529 W
542 W
03
Full specification
Parameter
615W
630W
Difference
Power and efficiency
Rated power
615 Wp
630 Wp
+15 W for 630W
Module efficiency
22.80 %
23.30 %
+0.50 pp for 630W
Power density
227.7 Wp/m²
233.2 Wp/m²
+5.6 Wp/m² for 630W
Open-circuit voltage
48.10 V
48.70 V
Effectively the same
Voltage at max power
40.00 V
40.60 V
Effectively the same
Short-circuit current
16.10 A
16.25 A
Effectively the same
Current at max power
15.38 A
15.53 A
Effectively the same
Temperature
Temperature coefficient
-0.310 %/°C
-0.310 %/°C
Same
Mechanical
Dimensions
2382x1134x35 mm
2382x1134x35 mm
Same
Module area
2.701 m²
2.701 m²
Same
Weight
29.0 kg
29.0 kg
Same
Weight per kWp
47.2 kg/kWp
46.0 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
30 yrs
30 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
No
No
Same
04
14,129 panels
Against the whole database
Efficiency
#2,769
vs
#1,057
630W leads by 1,712 places
Power density
#3,132
vs
#1,042
630W leads by 2,090 places
Heat behaviour
#8,069
vs
#8,069
Tied - the same position in the database
Weight
#1,520
vs
#963
630W leads by 557 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#660
vs
#294
630W leads by 366 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: HT-SAAE HT66-18X(N)-615W or HT-SAAE HT66-18X(N)-630W?
According to our database: HT-SAAE HT66-18X(N)-630 W has higher module efficiency (23.30% vs 22.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of HT-SAAE HT66-18X(N)-615W and HT-SAAE HT66-18X(N)-630W?
HT-SAAE HT66-18X(N)-615 W has a module efficiency of 22.80%, while HT-SAAE HT66-18X(N)-630 W is 23.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does HT-SAAE HT66-18X(N)-615W use vs HT-SAAE HT66-18X(N)-630W?
HT-SAAE HT66-18X(N)-615 W uses TOPCon cells; HT-SAAE HT66-18X(N)-630 W uses TOPCon. 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 HT-SAAE HT66-18X(N)-615W and HT-SAAE HT66-18X(N)-630W?
HT-SAAE HT66-18X(N)-615 W has a 30 years power warranty; HT-SAAE HT66-18X(N)-630 W 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.
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.