REC Alpha Pure-R 460W vs Panasonic EVPV400H

Our Verdict Winner: REC Alpha Pure-R 460W

The REC Alpha Pure-R 460W wins this comparison by a clear margin. It leads in efficiency (22.2% vs 21.2%) and matches or exceeds on warranty (25 vs 25 years). For most residential installations, the REC Alpha Pure-R 460W is the stronger choice.

Power / Capacity

460W

400W

Efficiency

22.2%

21.2%

Warranty

25 yrs

Key Differences

• REC Alpha Pure-R 460W is rated at 460W while Panasonic EVPV400H is rated at 400W, a 60W difference.
• REC Alpha Pure-R 460W achieves 22.2% efficiency vs 21.2% for the other, a 1.0 percentage point gap.
• Both carry matching 25-year product warranties.

Specifications Breakdown

Module Efficiency

The REC Alpha Pure-R 460W achieves 22.2% module efficiency compared to Panasonic EVPV400H's 21.2%, meaning REC Alpha Pure-R 460W converts 1.0 percentage points more sunlight into electricity per square meter. In practical terms, the REC Alpha Pure-R 460W produces 220.9 watts per square meter of panel area while the Panasonic EVPV400H produces 204.8 W/m². For rooftop installations where space is limited, this efficiency gap determines how many kilowatts you can fit on your available roof area. Over a 25-year system life, even a small efficiency advantage compounds into meaningful additional energy production.

Power Output

The REC Alpha Pure-R 460W delivers 460W per panel versus 400W for the Panasonic EVPV400H, a 60W difference per module. To build an 8 kW residential system, you would need 18 REC Alpha Pure-R 460W panels or 20 Panasonic EVPV400H panels. Choosing the higher-wattage option saves 2 panels, reducing total racking hardware, wiring, and installation labor costs. Higher wattage per panel is particularly valuable for commercial-scale installations where panel count directly impacts balance-of-system costs.

Temperature Coefficient

Both panels share an identical temperature coefficient of -0.26%/°C, meaning they lose power at the same rate as cell temperature rises above the 25°C standard test baseline. At 65°C cell temperature, both retain 94.8% of rated power. Neither panel has a thermal performance advantage, which makes this specification a non-factor in the comparison.

Warranty Coverage

The REC Alpha Pure-R 460W is backed by a 25-year product warranty and 25-year performance guarantee, while the Panasonic EVPV400H offers 25-year product and 25-year performance coverage. Both offer identical product warranty duration. Based on their published degradation rates (0.5% first year then 0.35%/year for REC Alpha Pure-R 460W; 0.5% first year then 0.35%/year for Panasonic EVPV400H), after 25 years the REC Alpha Pure-R 460W should retain approximately 91.1% of original output versus 91.1% for the Panasonic EVPV400H. The end-of-life output levels are closely matched.

Physical Dimensions & Weight

The REC Alpha Pure-R 460W measures 1728×1205×30mm and weighs 23 kg, while the Panasonic EVPV400H measures 1722×1134×30mm at 21 kg. 2.08 m² of panel area for the REC Alpha Pure-R 460W versus 1.95 m² for the Panasonic EVPV400H. The Panasonic EVPV400H is 2.0 kg lighter per panel, which reduces structural load requirements on the roof and makes handling easier during installation. For a 20-panel system, that is a total weight difference of 40 kg. The more compact Panasonic EVPV400H may be easier to fit on irregularly shaped or space-limited rooftops.

Specification Comparison

Specification	REC Alpha Pure-R 460W	Panasonic EVPV400H
Power	460W	400W
Efficiency	22.2%	21.2%
Power Density	20.5 W/sq ft	19.0 W/sq ft
Cell Type	HJT (Heterojunction)	HJT (Heterojunction)
Bifacial	Yes	Yes
Weight	23 kg	21 kg
Temp Coefficient	-0.26%/°C	-0.26%/°C
Snow Load	5400 Pa	5400 Pa
Wind Load	3600 Pa	2400 Pa
Product Warranty	25 years	25 years
Performance Warranty	25 years	25 years
Degradation (Year 1)	0.5%	0.5%
Annual Degradation	0.35%	0.35%
Country	Singapore	Japan

5-Dimension Head-to-Head Analysis

1. Efficiency & Power Density

Winner: REC Alpha Pure-R 460W

The REC Alpha Pure-R 460W achieves 22.2% efficiency versus 21.2% — a 1.0 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 1.8 kW more total system capacity, or 9 kWh more annual production in an average US location.

2. Hot Climate Performance

Winner: Tie

Both panels share a temperature coefficient of -0.26%/°C — identical heat tolerance.

3. Durability & Warranty

Winner: Tie

Both panels offer identical 25-year product warranties and 0.35% annual degradation. Neither has a durability advantage.

4. Power Output

Winner: REC Alpha Pure-R 460W

The REC Alpha Pure-R 460W delivers 460W versus 400W per panel — 60W more. For an 8 kW system, you need 18 panels with the higher-wattage option versus 20 panels, saving 2 panels and the associated racking and labor costs.

5. Cell Technology

Winner: Tie

Both panels use HJT (Heterojunction) cell technology. No technology advantage for either product.

REC Alpha Pure-R 460W

REC's Alpha Pure-R 460W delivers HJT performance in a larger format, combining high output with HJT's superior temperature and degradation performance. Note: model naming may vary by region.

Pros

+ High 460W HJT output
+ 25-year product warranty
+ Excellent heat tolerance
+ Low degradation

Cons

- Large form factor
- Premium pricing
- Regional availability varies

View full REC Alpha Pure-R 460W specs →

Panasonic EVPV400H

DISCONTINUED: Panasonic exited solar manufacturing in 2023. The EVPV400H was Panasonic's standard HJT residential panel, delivering 400W with the brand's signature quality and longevity.

Pros

+ Panasonic reliability
+ HJT advantages
+ Solid 25-year warranty
+ Good all-round performer

Cons

- DISCONTINUED - no longer manufactured
- No new units available
- No ongoing product support

View full Panasonic EVPV400H specs →

Choose REC Alpha Pure-R 460W If...

✓ Your roof space is limited and you need maximum power per panel
✓ You want fewer panels to reach your target system size, reducing racking and labor costs
✓ You prefer newer cell technology with a longer performance improvement runway
✓ Commercial and large residential systems prioritizing longevity and heat tolerance.

Choose Panasonic EVPV400H If...

✓ You prefer newer cell technology with a longer performance improvement runway
✓ No longer available for new installations.

Our Recommendation

Recommended REC Alpha Pure-R 460W

We recommend the REC Alpha Pure-R 460W for most buyers in this comparison. It wins 2 of 5 key dimensions and offers a clear advantage in the metrics that matter most for a solar panel purchase. The Panasonic EVPV400H remains a good product, but the REC Alpha Pure-R 460W delivers better overall value for the majority of installations.

View REC Alpha Pure-R 460W specs → View Panasonic EVPV400H specs →

Frequently Asked Questions

Which is better, REC Alpha Pure-R 460W or Panasonic EVPV400H?

Which panel is more efficient, REC Alpha Pure-R 460W or Panasonic EVPV400H?

The REC Alpha Pure-R 460W at 22.2% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 1.0 percentage points translates to approximately 60W per panel under standard test conditions.

Which has a better warranty, REC Alpha Pure-R 460W or Panasonic EVPV400H?

The REC Alpha Pure-R 460W comes with a 25-year product warranty and 25-year performance guarantee. The Panasonic EVPV400H offers 25-year product and 25-year performance warranties. Both offer identical warranty terms.

Which panel performs better in hot weather?

The REC Alpha Pure-R 460W has a temperature coefficient of -0.26%/°C and the Panasonic EVPV400H is -0.26%/°C. Both handle heat equally. A lower (less negative) temperature coefficient is better.

How many REC Alpha Pure-R 460W vs Panasonic EVPV400H panels do I need for an 8 kW system?

For an 8 kW system: you need 18 REC Alpha Pure-R 460W panels (460W each) or 20 Panasonic EVPV400H panels (400W each). The REC Alpha Pure-R 460W requires fewer panels, saving on racking hardware and installation labor.

Related Resources

View full REC Alpha Pure-R 460W specifications → View full Panasonic EVPV400H specifications → All REC products → All Panasonic products →

Last updated: February 2026