REC Alpha Pure-RX 470 Wp vs REC640AA Pro MG 5 of 18 identical Swap Change panels

REC REC Alpha Pure-RX 470 Wp vs REC REC640AA Pro MG

Q: Which panel is better: REC REC Alpha Pure-RX 470 Wp or REC REC640AA Pro MG?

According to our database: REC REC Alpha Pure-RX 470 Wp has higher module efficiency (22.60% vs 22.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of REC REC Alpha Pure-RX 470 Wp and REC REC640AA Pro MG?

REC REC Alpha Pure-RX 470 Wp has a module efficiency of 22.60%, while REC REC640AA Pro MG is 22.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does REC REC Alpha Pure-RX 470 Wp use vs REC REC640AA Pro MG?

REC REC Alpha Pure-RX 470 Wp uses HJT cells; REC REC640AA 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.

Q: What is the warranty on REC REC Alpha Pure-RX 470 Wp and REC REC640AA Pro MG?

REC REC Alpha Pure-RX 470 Wp has a 25 years power warranty; REC REC640AA 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.

Q: Are REC REC Alpha Pure-RX 470 Wp and REC REC640AA Pro MG bifacial panels?

REC REC640AA Pro MG is bifacial (captures light from both faces); REC REC Alpha Pure-RX 470 Wp is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

REC

REC Alpha Pure-RX 470 Wp

470 Wp 22.60 % HJT

Open panel page Datasheet PDF

REC

REC640AA Pro MG

640 Wp 22.50 % HJT Bifacial

Open panel page Datasheet PDF

The verdict

REC640AA Pro MG leads on the differences that matter

The largest is rated power: 170 W more power. 5 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 13 differences

How alike are they

5 of 18 comparable
parameters are identical

identical differs not published

What actually differs

13 of 18 parameters

Parameter REC Alpha Pure-RX 470 Wp REC640AA Pro MG Difference

Rated power 470 Wp 640 Wp 170 W more power

Performance warranty 25 yrs 30 yrs 5 yrs longer

Weight 23.4 kg 36.8 kg 13.4 kg lighter

Product warranty 25 yrs 30 yrs 5 yrs longer

Weight per kWp 49.8 kg/kWp 57.5 kg/kWp 7.7 kg/kWp lighter

Open-circuit voltage 65.70 V 44.90 V 20.80 V apart

Short-circuit current 8.95 A 17.89 A 8.94 A apart

Module area 2.079 m² 2.838 m² 0.759 m² apart

Annual degradation 0.33 %/yr 0.25 %/yr 0.08 %/yr slower

Voltage at max power 55.40 V 37.10 V 18.30 V apart

Current at max power 8.49 A 17.26 A 8.77 A apart

Bifacial No Yes No vs Yes

Dimensions 1727x1204x31 mm 2175x1305x30 mm 1727x1204x31 mm vs 2175x1305x30 mm

What it means on a roof

Thirty years of production

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

Cell temperature

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.

REC Alpha Pure-RX 470 Wp

16,108 kWh

REC640AA Pro MG

21,744 kWh

Lifetime gap

5,636 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario REC Alpha Pure-RX 470 Wp REC640AA Pro MG

Standard test conditions 25 °C 100.0% of rated power 470 W 640 W

Cool, bright day 40 °C 96.4% of rated power 453 W 617 W

Typical summer roof 55 °C 92.8% of rated power 436 W 594 W

Hot roof 70 °C 89.2% of rated power 419 W 571 W

Full specification

Parameter REC Alpha Pure-RX 470 Wp REC640AA Pro MG Difference

Power and efficiency

Rated power 470 Wp 640 Wp +170 W for REC640AA Pro MG

Module efficiency 22.60 % 22.50 % Effectively the same

Power density 226.0 Wp/m² 225.5 Wp/m² Effectively the same

Open-circuit voltage 65.70 V 44.90 V 20.80 V apart

Voltage at max power 55.40 V 37.10 V 18.30 V apart

Short-circuit current 8.95 A 17.89 A 8.94 A apart

Current at max power 8.49 A 17.26 A 8.77 A apart

Temperature

Temperature coefficient -0.240 %/°C -0.240 %/°C Same

Mechanical

Dimensions 1727x1204x31 mm 2175x1305x30 mm 1727x1204x31 mm vs 2175x1305x30 mm

Module area 2.079 m² 2.838 m² 0.759 m² apart

Weight 23.4 kg 36.8 kg -13.4 kg for REC Alpha Pure-RX 470 Wp

Weight per kWp 49.8 kg/kWp 57.5 kg/kWp -7.7 kg/kWp for REC Alpha Pure-RX 470 Wp

Warranty and degradation

Product warranty 25 yrs 30 yrs +5 yrs for REC640AA Pro MG

Performance warranty 25 yrs 30 yrs +5 yrs for REC640AA Pro MG

Annual degradation 0.33 %/yr 0.25 %/yr -0.08 %/yr for REC640AA Pro MG

Technology

Cell technology HJT HJT Same

Cell type Monocrystalline Monocrystalline Same

Cell count - 120 Not published by REC

Bifacial No Yes No vs Yes

Against the whole database

14,005 panels

Efficiency

#3,658 vs #4,222

REC Alpha Pure-RX 470 Wp leads by 564 places

Power density

#3,709 vs #3,889

REC Alpha Pure-RX 470 Wp leads by 180 places

Heat behaviour

#13 vs #13

Tied - the same position in the database

Weight

#3,227 vs #11,246

REC Alpha Pure-RX 470 Wp leads by 8,019 places

Warranty

#9,798 vs #21

REC640AA Pro MG leads by 9,777 places

Overall

#6,413 vs #504

REC640AA Pro MG leads by 5,909 places

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Written summary

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Questions about this pairing

Which panel is better: REC REC Alpha Pure-RX 470 Wp or REC REC640AA Pro MG?

According to our database: REC REC Alpha Pure-RX 470 Wp has higher module efficiency (22.60% vs 22.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of REC REC Alpha Pure-RX 470 Wp and REC REC640AA Pro MG?

REC REC Alpha Pure-RX 470 Wp has a module efficiency of 22.60%, while REC REC640AA Pro MG is 22.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does REC REC Alpha Pure-RX 470 Wp use vs REC REC640AA Pro MG?

REC REC Alpha Pure-RX 470 Wp uses HJT cells; REC REC640AA 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 REC Alpha Pure-RX 470 Wp and REC REC640AA Pro MG?

REC REC Alpha Pure-RX 470 Wp has a 25 years power warranty; REC REC640AA 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 REC Alpha Pure-RX 470 Wp and REC REC640AA Pro MG bifacial panels?

REC REC640AA Pro MG is bifacial (captures light from both faces); REC REC Alpha Pure-RX 470 Wp is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

Shop prices: See 7 REC 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.