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18X(N)-630W vs 18X(ND)-F 615W 13 of 19 identical Swap Change panels

HT-SAAE HT66-18X(N)-630W vs HT-SAAE HT66-18X(ND)-F 615W

HT-SAAE
HT66-18X(N)-630W
630 Wp 23.30 % TOPCon
Open panel page Datasheet PDF
VS
HT-SAAE
HT66-18X(ND)-F 615W
615 Wp 22.80 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

18X(N)-630W leads on the differences that matter

The largest is module efficiency: 0.50 pp more efficient. 13 of 19 comparable parameters are identical.

See all 6 differences
How alike are they
13 of 19 comparable
parameters are identical
identical differs
01

What actually differs

6 of 19 parameters
Parameter 18X(N)-630W 18X(ND)-F 615W Difference
Module efficiency 23.30 % 22.80 % 0.50 pp more efficient
Weight 29.0 kg 33.5 kg 4.5 kg lighter
Weight per kWp 46.0 kg/kWp 54.5 kg/kWp 8.4 kg/kWp lighter
Power density 233.2 Wp/m² 227.7 Wp/m² 5.6 Wp/m² higher
Rated power 630 Wp 615 Wp 15 W more power
Bifacial No Yes No vs Yes
02

What it means on a roof

Thirty years of production
Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, 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.
18X(N)-630W
21,138 kWh
18X(ND)-F 615W
20,634 kWh
Lifetime gap
504 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 18X(N)-630W 18X(ND)-F 615W
Standard test conditions 25 °C 100.0% of rated power 630 W 615 W
Cool, bright day 40 °C 95.3% of rated power 601 W 586 W
Typical summer roof 55 °C 90.7% of rated power 571 W 558 W
Hot roof 70 °C 86.0% of rated power 542 W 529 W
03

Full specification

Parameter 18X(N)-630W 18X(ND)-F 615W Difference
Power and efficiency
Rated power 630 Wp 615 Wp +15 W for 18X(N)-630W
Module efficiency 23.30 % 22.80 % +0.50 pp for 18X(N)-630W
Power density 233.2 Wp/m² 227.7 Wp/m² +5.6 Wp/m² for 18X(N)-630W
Open-circuit voltage 48.70 V 48.10 V Effectively the same
Voltage at max power 40.60 V 40.00 V Effectively the same
Short-circuit current 16.25 A 16.10 A Effectively the same
Current at max power 15.53 A 15.38 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 33.5 kg -4.5 kg for 18X(N)-630W
Weight per kWp 46.0 kg/kWp 54.5 kg/kWp -8.4 kg/kWp for 18X(N)-630W
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 Yes No vs Yes
04

Against the whole database

14,129 panels
Efficiency
#1,057 vs #2,769
18X(N)-630W leads by 1,712 places
Power density
#1,042 vs #3,132
18X(N)-630W leads by 2,090 places
Heat behaviour
#8,069 vs #8,069
Tied - the same position in the database
Weight
#963 vs #8,895
18X(N)-630W leads by 7,932 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#294 vs #720
18X(N)-630W leads by 426 places
05

More useful comparisons

Open the full database
Same series, other bin
HT-SAAE
HT-SAAE HT66-18X(N)-630W vs HT-SAAE HT66-18X(N)-625W
One difference: module efficiency
Same series, other bin
HT-SAAE
HT-SAAE HT66-18X(N)-630W vs HT-SAAE HT66-18X(ND)-F 620W
6 differences, the largest is weight
Same series, other bin
HT-SAAE
HT-SAAE HT66-18X(N)-630W vs HT-SAAE HT66-18X(N)-620W
3 differences, the largest is module efficiency
Same series, other bin
HT-SAAE
HT-SAAE HT66-18X(N)-630W vs HT-SAAE HT66-18X(ND)-F-620
6 differences, the largest is weight
Same series, other bin
HT-SAAE
HT-SAAE HT66-18X(N)-630W vs HT-SAAE HT66-18X(N)-615W
3 differences, the largest is module efficiency
Same series, other bin
HT-SAAE
HT-SAAE HT66-18X(N)-630W vs HT-SAAE HT66-18X(ND)-F-615
6 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: HT-SAAE HT66-18X(N)-630W or HT-SAAE HT66-18X(ND)-F 615W?
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)-630W and HT-SAAE HT66-18X(ND)-F 615W?
HT-SAAE HT66-18X(N)-630 W has a module efficiency of 23.30%, while HT-SAAE HT66-18X(ND)-F 615 W is 22.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does HT-SAAE HT66-18X(N)-630W use vs HT-SAAE HT66-18X(ND)-F 615W?
HT-SAAE HT66-18X(N)-630 W uses TOPCon cells; HT-SAAE HT66-18X(ND)-F 615 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)-630W and HT-SAAE HT66-18X(ND)-F 615W?
HT-SAAE HT66-18X(N)-630 W has a 30 years power warranty; HT-SAAE HT66-18X(ND)-F 615 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.
Are HT-SAAE HT66-18X(N)-630W and HT-SAAE HT66-18X(ND)-F 615W bifacial panels?
HT-SAAE HT66-18X(ND)-F 615 W is bifacial (captures light from both faces); HT-SAAE HT66-18X(N)-630 W is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

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.