--- title: "REC REC600AA PRO M 600W Solar Panel - Specs & Review | ComparePV" description: "REC REC600AA PRO M 600W solar panel. Specs: 21.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/rec-rec600aa-pro-m" updated: 2026-09-11 --- # REC REC600AA PRO M Middle of its segment, modest efficiency 76 panels in the segment HJT 600-650 W ## Identity - **Manufacturer:** REC - **Model:** REC600AA PRO M - **Series:** REC Alpha Pro M Series - **Rated power:** 600 W - **Cell technology:** HJT - **Bifacial:** yes ## How it compares Compared against segment HJT 600-650 W (76 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 600 W | 625 W | Weak - bottom 7% | | | Module efficiency | 21.10% | 22.60% | Weak - bottom 1% | 9,297 | | Power density | 211.4 | 225.8 | Weak - bottom 1% | 9,213 | | Temperature coefficient | -0.240 | -0.240 | Typical | 13 | | Weight (kg) | 32.5 kg | 33.6 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 3% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.10% | 22.60% | Weak - bottom 1% | 9,297 | | Power density | 211.4 | 225.8 | Weak - bottom 1% | 9,213 | | Temperature coefficient | -0.240 | -0.240 | Typical | 13 | | Weight per kWp | 54.2 | 54.7 | Typical | 8,370 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 3% | 9,798 | ### Watch out for - **21.10% module efficiency** - Bottom 1% of the HJT 600-650 W segment, against a median of 22.60%. Ranked 9,297th in the whole database. - **211.4 watts per square metre** - Bottom 1% of the HJT 600-650 W segment, against a median of 225.8. Ranked 9,213th in the whole database. - **25 year performance warranty** - Bottom 3% of the HJT 600-650 W segment, against a median of 30 yrs. Ranked 9,798th in the whole database. - **Best for:** Commercial, utility-scale, shaded-installations and hot-climate. - **Not ideal for:** Tight roof space, roofs where every square metre has to count and owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 600 W - **Efficiency:** 21.10 % - **Voltage at Pmax (Vmp):** 36.00 V - **Current at Pmax (Imp):** 16.67 A - **Open-circuit voltage (Voc):** 44.20 V - **Short-circuit current (Isc):** 17.65 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.240 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** HJT - **Cell count:** 120 - **Bifacial:** yes ### Physical - **Length:** 2175 mm - **Width:** 1305 mm - **Thickness:** 30 mm - **Weight:** 32.5 kg - **Area:** 2.84 m2 - **Power density:** 211.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 20 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 92.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.25 % - **Output after 30 years:** 545 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9297 of 14005 | | Power density | 9213 of 14005 | | Temperature coefficient | 13 of 14005 | | Weight | 8370 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **N-type HJT cells with stable temp. coefficient** - The power temperature coefficient is -0.24%/K, notably better than the typical -0.35%/K for PERC modules, and HJT technology eliminates light-induced degradation (LID). This delivers higher and more predictable energy yield on hot days, critical for large rooftop and ground-mount installations. - **25-year power warranty with >92% retention** - The manufacturer guarantees a minimum of 92% of nameplate power after 25 years of operation, backed by a 20-year product warranty. This is a solid, linear degradation profile that simplifies long-term project bankability modeling. - **>70% bifaciality and Twin Design technology** - The module generates power from both cell sides (bifaciality above 70%), and the patented Twin Design with a redundant current path reduces output losses under partial shading or soiling - a common issue on industrial rooftops. - **Reinforced construction for high mechanical loads** - The panel withstands test loads up to 5400 Pa, and combined with solder-free, dense cell interconnection (120 half-cut cells), lowers the risk of microcracks and service failures in installations exposed to wind and snow loads. - **Tier-1 manufacturer with in-house production** - REC Group (Norway, founded in 1996) is recognized as a bankable Tier-1 manufacturer by BloombergNEF, and Alpha Pro M modules are produced at its own Singapore facility, easing project financing for banks and institutional investors. ## Cons - **Efficiency trails top TOPCon peers** - Maximum efficiency of 22.5% (640 Wp) is lower than same power-class competitors: Jinko EAGLE G7B reaches 23.69%, Jetion JT SRt(B) 22.9%, and Luxen N6 22.61%. Despite the premium HJT technology, REC requires relatively more roof area for the equivalent installed capacity. ## About this series The REC Alpha Pro M series consists of modules designed for large-scale installations where maximizing power output per square meter and quick installation on rooftops or on the ground are key. A key advantage is the **n-type HJT cell technology**, which reduces typical start-up losses and performs more stably in high temperatures - making it easier to predict energy production and project profitability. The **advanced, solderless cell interconnection** with a dense network of conductors, which reduces the risk of microcracks and power drops over time, is also noteworthy. This translates to fewer unexpected service issues and more consistent performance across the entire module park. The REC Alpha Pro M stands out with its **Twin Design**, which helps maintain power generation even with partial shading or soiling - a common problem on industrial rooftops. Furthermore, the **reinforced structure** with supporting elements increases resistance to loads. This is a solution for companies, halls, PV farms, and investors who need high power output from a limited area, without compromising on durability and warranties. ## Notable figures - Module efficiency of 21.1% is 1.5pp below average for \*\*HJT 600-650W\*\* panels (median: 22.6%) - At 211.4 W/m², this panel generates 14.4 W/m² less per unit area than \*\*HJT 600-650W\*\* median (225.8 W/m²) - Temperature coefficient of -0.24%/°C matches the \*\*HJT 600-650W\*\* median - 32.5 kg weight - 1.1 kg lighter than \*\*HJT 600-650W\*\* median (33.6 kg), reducing installation effort - In the top 66% for efficiency among all HJT panels ## Questions ### What warranty does the REC Alpha Pro M Series come with? The REC Alpha Pro M Series carries a 20-year product warranty and a 25-year linear power performance warranty. REC guarantees at least 92% of nominal power output after 25 years of operation. This is one of the most comprehensive warranty packages in the commercial and industrial PV segment, backed by REC Group's Tier 1 manufacturer status, Norwegian heritage, and production facilities in Singapore. ### What is HJT technology and why does it matter in the REC Alpha Pro M Series? HJT (Heterojunction Technology) uses n-type crystalline silicon cells wrapped in a thin amorphous silicon passivation layer that minimizes carrier recombination losses. In the REC Alpha Pro M, this results in up to 22.5% module efficiency and a best-in-class temperature coefficient of -0.24%/°C. Compared to standard PERC modules (typically -0.35%/°C), the Alpha Pro M retains significantly more power on hot summer days, improving long-term LCOE for large-scale commercial and industrial projects. ### Is the REC Alpha Pro M a bifacial panel, and what energy gain can I realistically expect? Yes, the REC Alpha Pro M is a bifacial module with a bifaciality factor exceeding 70%. The rear side captures albedo light reflected from the ground surface, which can add 5–15% to annual energy yield depending on ground reflectivity and mounting height. Ground-mount installations over highly reflective surfaces such as gravel, concrete, or snow benefit the most. Adequate racking clearance above ground is recommended to fully leverage the bifacial gain. ### Is the REC Alpha Pro M 640W suitable for industrial rooftop or warehouse installation? Yes. The 640W module (2175×1305×30 mm, 32.5 kg) is engineered for large commercial and industrial (C&I) rooftop and ground-mount deployments. The reinforced frame withstands mechanical loads up to +5400 Pa on both front and rear surfaces. The Twin Design architecture maintains power generation under partial shading caused by HVAC units, skylights, or roof penetrations — a common challenge on industrial rooftops — making it a reliable choice for high-density commercial PV arrays. ### How does the REC Alpha Pro M perform in cold weather and low-light winter conditions? Thanks to HJT n-type cell technology, the REC Alpha Pro M has a temperature coefficient of -0.24%/°C, meaning it loses considerably less power in heat and performs better in cold compared to PERC modules (typically -0.35%/°C). On cold, sunny winter days, the module can reach or briefly exceed its STC-rated power. The 22.5% module efficiency also helps maximize energy harvest during winter months when irradiance is limited. ### How does the REC Alpha Pro M Series differ from the REC Alpha Pure Series for residential use? The REC Alpha Pro M targets commercial, industrial, and utility-scale applications with power ratings of 600–640W and larger module dimensions optimized for high-density PV arrays. The REC Alpha Pure is designed for the residential and small prosumer market, featuring smaller modules with lower per-panel power output. Both series share n-type HJT cell technology, but the Pro M prioritizes maximum watts per square meter and enhanced structural durability suited to demanding commercial and industrial environments. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/web-ds-rec-alpha-pro-m-ul-en-12122024-2accfe0b5158.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +50 W, lighter, +4.1 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Lighter, +3.9 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Lighter, +3.7 pp, +5 yr warranty | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Lighter, +3.7 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Lighter, +3.5 pp, +5 yr warranty | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | Lighter, +3.5 pp, +5 yr warranty | | [REC REC590AA Pro MG](https://comparepv.com/panel/rec-rec590aa-pro-mg) | 590 W | Heavier, -0.3 pp, +5 yr warranty | | [REC REC610AA PRO M](https://comparepv.com/panel/rec-rec610aa-pro-m) | 610 W | +10 W, +0.4 pp | | [REC REC620AA PRO M](https://comparepv.com/panel/rec-rec620aa-pro-m) | 620 W | +20 W, +0.7 pp | | [REC REC630AA PRO M](https://comparepv.com/panel/rec-rec630aa-pro-m) | 630 W | +30 W, +1.1 pp | | [REC REC640AA PRO M](https://comparepv.com/panel/rec-rec640aa-pro-m) | 640 W | +40 W, +1.4 pp | | [Gamko New Energy GKA210N120](https://comparepv.com/panel/gamko-new-energy-gka210n120) | 680 W | +80 W, hotter, +2.9 pp | | [Gamko New Energy GKA210N120-675](https://comparepv.com/panel/gamko-new-energy-gka210n120-675) | 675 W | +75 W, hotter, +2.8 pp | | [Q-SUN Solar QN-670HJT-01](https://comparepv.com/panel/q-sun-solar-qn-670hjt-01) | 670 W | +70 W, +2.6 pp, +5 yr warranty | | [Gamko New Energy GKA210N120-670](https://comparepv.com/panel/gamko-new-energy-gka210n120-670) | 670 W | +70 W, hotter, +2.6 pp | | [Q-SUN Solar QN-665HJT-01](https://comparepv.com/panel/q-sun-solar-qn-665hjt-01) | 665 W | +65 W, +2.4 pp, +5 yr warranty | --- Source: https://comparepv.com/panel/rec-rec600aa-pro-m Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.