--- title: "REC REC Alpha Pure-RX 470 Wp vs REC REC640AA Pro MG - Solar Panel Comparison | ComparePV" description: "Compare REC REC Alpha Pure-RX 470 Wp vs REC REC640AA Pro MG side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/rec-rec-alpha-pure-rx-470-wp/rec-rec640aa-pro-mg" updated: 2026-09-11 --- # REC REC Alpha Pure-RX 470 Wp vs REC REC640AA Pro MG 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. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [REC REC Alpha Pure-RX 470 Wp](https://comparepv.com/panel/rec-rec-alpha-pure-rx-470-wp) | [REC REC640AA Pro MG](https://comparepv.com/panel/rec-rec640aa-pro-mg) | | Manufacturer | REC | REC | | Power | 470 Wp | 640 Wp | | Efficiency | 22.60 % | 22.50 % | | Technology | HJT | HJT | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | REC Alpha Pure-RX 470 Wp | REC640AA Pro MG | Difference | | --- | --- | --- | --- | | Rated power | 470 Wp | 640 Wp | +170 W for REC640AA Pro MG | | Performance warranty | 25 yrs | 30 yrs | +5 yrs for REC640AA Pro MG | | Weight | 23.4 kg | 36.8 kg | -13.4 kg for REC Alpha Pure-RX 470 Wp | | Product warranty | 25 yrs | 30 yrs | +5 yrs for REC640AA Pro MG | | Weight per kWp | 49.8 kg/kWp | 57.5 kg/kWp | -7.7 kg/kWp for REC Alpha Pure-RX 470 Wp | | 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 for REC640AA Pro MG | | 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 | ## Every compared parameter | Parameter | REC Alpha Pure-RX 470 Wp | REC640AA Pro MG | | --- | --- | --- | | Rated power | 470 Wp | 640 Wp | | Module efficiency | 22.60 % | 22.50 % | | Power density | 226.0 Wp/m² | 225.5 Wp/m² | | Open-circuit voltage | 65.70 V | 44.90 V | | Voltage at max power | 55.40 V | 37.10 V | | Short-circuit current | 8.95 A | 17.89 A | | Current at max power | 8.49 A | 17.26 A | | Temperature coefficient | -0.240 %/°C | -0.240 %/°C | | Dimensions | 1727x1204x31 mm | 2175x1305x30 mm | | Module area | 2.079 m² | 2.838 m² | | Weight | 23.4 kg | 36.8 kg | | Weight per kWp | 49.8 kg/kWp | 57.5 kg/kWp | | Product warranty | 25 yrs | 30 yrs | | Performance warranty | 25 yrs | 30 yrs | | Annual degradation | 0.33 %/yr | 0.25 %/yr | | Cell technology | HJT | HJT | | Cell type | Monocrystalline | Monocrystalline | | Cell count | - | 120 | | Bifacial | No | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year 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. - **Cumulative output, REC Alpha Pure-RX 470 Wp:** 16,108 kWh - **Cumulative output, REC640AA Pro MG:** 21,744 kWh - **Gap:** 5,636 kWh ## Output when hot | Condition | Cell temperature | REC Alpha Pure-RX 470 Wp | REC640AA Pro MG | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 470 W | 640 W | 100.0% of rated power | | Cool, bright day | 40 °C | 453 W | 617 W | 96.4% of rated power | | Typical summer roof | 55 °C | 436 W | 594 W | 92.8% of rated power | | Hot roof | 70 °C | 419 W | 571 W | 89.2% of rated power | ## Against the whole database | Measure | REC Alpha Pure-RX 470 Wp | REC640AA Pro MG | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #3,658 | #4,222 | 14,005 | REC Alpha Pure-RX 470 Wp leads by 564 places | | Power density | #3,709 | #3,889 | 14,005 | REC Alpha Pure-RX 470 Wp leads by 180 places | | Heat behaviour | #13 | #13 | 14,005 | Tied - the same position in the database | | Weight | #3,227 | #11,246 | 14,005 | REC Alpha Pure-RX 470 Wp leads by 8,019 places | | Warranty | #9,798 | #21 | 14,005 | REC640AA Pro MG leads by 9,777 places | | Overall | #6,413 | #504 | 14,005 | REC640AA Pro MG leads by 5,909 places | ## Questions ### 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. ## Related comparisons - [REC REC Alpha Pure-RX 470 Wp vs REC REC475AA Pure-RX](https://comparepv.com/compare/rec-rec-alpha-pure-rx-470-wp/rec-rec475aa-pure-rx) - 5 differences, the largest is product warranty - [REC REC Alpha Pure-RX 470 Wp vs REC REC470AA Pure-RX](https://comparepv.com/compare/rec-rec-alpha-pure-rx-470-wp/rec-rec470aa-pure-rx-1) - 4 differences, the largest is product warranty - [REC REC Alpha Pure-RX 470 Wp vs REC REC Alpha Pure-RX 470](https://comparepv.com/compare/rec-rec-alpha-pure-rx-470-wp/rec-rec-alpha-pure-rx-470) - 2 differences, the largest is annual degradation - [REC REC Alpha Pure-RX 470 Wp vs REC REC465AA Pure-RX](https://comparepv.com/compare/rec-rec-alpha-pure-rx-470-wp/rec-rec465aa-pure-rx) - 5 differences, the largest is product warranty - [REC REC Alpha Pure-RX 470 Wp vs REC REC460AA Pure-RX](https://comparepv.com/compare/rec-rec-alpha-pure-rx-470-wp/rec-rec460aa-pure-rx-1) - 7 differences, the largest is module efficiency - [REC REC Alpha Pure-RX 470 Wp vs REC REC455AA Pure-RX](https://comparepv.com/compare/rec-rec-alpha-pure-rx-470-wp/rec-rec455aa-pure-rx) - 7 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/rec-rec-alpha-pure-rx-470-wp/rec-rec640aa-pro-mg Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.