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72HD585 vs 72HD590 18 of 19 identical Swap Change panels

Tongwei TWMND-72HD585 vs Tongwei TWMND-72HD590

TWMND-72HD585
585 Wp 22.60 % N-type Bifacial
Open panel page Datasheet PDF
VS
TWMND-72HD590
590 Wp 22.80 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

72HD590 leads on the differences that matter

The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical.

See the one difference
How alike are they
18 of 19 comparable
parameters are identical
identical differs
01

What actually differs

1 of 19 parameters
Parameter 72HD585 72HD590 Difference
Module efficiency 22.60 % 22.80 % 0.20 pp more efficient
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 (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
72HD585
19,628 kWh
72HD590
19,796 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 72HD585 72HD590
Standard test conditions 25 °C 100.0% of rated power 585 W 590 W
Cool, bright day 40 °C 95.8% of rated power 560 W 565 W
Typical summer roof 55 °C 91.6% of rated power 536 W 540 W
Hot roof 70 °C 87.4% of rated power 511 W 516 W
03

Full specification

Parameter 72HD585 72HD590 Difference
Power and efficiency
Rated power 585 Wp 590 Wp Effectively the same
Module efficiency 22.60 % 22.80 % +0.20 pp for 72HD590
Power density 226.5 Wp/m² 228.4 Wp/m² Effectively the same
Open-circuit voltage 52.50 V 52.70 V Effectively the same
Voltage at max power 44.10 V 44.27 V Effectively the same
Short-circuit current 13.90 A 13.95 A Effectively the same
Current at max power 13.27 A 13.33 A Effectively the same
Temperature
Temperature coefficient -0.280 %/°C -0.280 %/°C Same
Mechanical
Dimensions 2278x1134x30 mm 2278x1134x30 mm Same
Module area 2.583 m² 2.583 m² Same
Weight 31.5 kg 31.5 kg Same
Weight per kWp 53.8 kg/kWp 53.4 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology N-type N-type Same
Cell type Monocrystalline Monocrystalline Same
Cell count 144 144 Same
Bifacial Yes Yes Same
04

Against the whole database

14,129 panels
Efficiency
#3,716 vs #2,769
72HD590 leads by 947 places
Power density
#3,557 vs #2,653
72HD590 leads by 904 places
Heat behaviour
#1,347 vs #1,347
Tied - the same position in the database
Weight
#7,974 vs #7,361
72HD590 leads by 613 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#4,244 vs #3,836
72HD590 leads by 408 places
05

More useful comparisons

Open the full database
Same series, other bin
Tongwei TWMND-72HD585 vs Tongwei TWMND-72HD600
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMND-72HD585 vs Tongwei TWMND-72HD595
3 differences, the largest is module efficiency
Same series, other bin
Tongwei TWMND-72HD585 vs Tongwei TWMND-72HD580
The same specification on paper
Same manufacturer
Tongwei TWMND-72HD585 vs Tongwei TWMNF-66HD750
13 differences, the largest is module efficiency
Same manufacturer
Tongwei TWMND-72HD585 vs Tongwei TWMNF-66HD745
13 differences, the largest is module efficiency
Same manufacturer
Tongwei TWMND-72HD585 vs Tongwei TWMNF-66HD740
13 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Tongwei TWMND-72HD585 or Tongwei TWMND-72HD590?
According to our database: Tongwei TWMND-72HD590 has higher module efficiency (22.80% vs 22.60%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tongwei TWMND-72HD585 and Tongwei TWMND-72HD590?
Tongwei TWMND-72HD585 has a module efficiency of 22.60%, while Tongwei TWMND-72HD590 is 22.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tongwei TWMND-72HD585 use vs Tongwei TWMND-72HD590?
Tongwei TWMND-72HD585 uses N-type cells; Tongwei TWMND-72HD590 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 Tongwei TWMND-72HD585 and Tongwei TWMND-72HD590?
Tongwei TWMND-72HD585 has a 30 years power warranty; Tongwei TWMND-72HD590 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 Tongwei TWMND-72HD585 and Tongwei TWMND-72HD590 bifacial panels?
Both Tongwei TWMND-72HD585 and Tongwei TWMND-72HD590 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 56 Tongwei 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.