Renogy 100W Portable Solar Panel vs Solaria PowerXT 400R Pure Black
The Solaria PowerXT 400R Pure Black wins this comparison by a decisive margin. It delivers more power (400W vs 100W). For most residential installations, the Solaria PowerXT 400R Pure Black is the stronger choice.
Key Differences
- • Renogy 100W Portable Solar Panel is rated at 100W while Solaria PowerXT 400R Pure Black is rated at 400W, a 300W difference.
- • Renogy 100W Portable Solar Panel achieves 23.5% efficiency vs 20.5% for the other, a 3.0 percentage point gap.
- • Solaria PowerXT 400R Pure Black comes with a 25-year product warranty vs 2 years for the other.
- • Solaria PowerXT 400R Pure Black has a superior temperature coefficient of -0.34%/°C vs -0.37%/°C, retaining more power in hot climates.
- • Renogy 100W Portable Solar Panel uses Monocrystalline cells while Solaria PowerXT 400R Pure Black uses Shingled Mono PERC cells, representing different technology generations.
Specifications Breakdown
Module Efficiency
The Renogy 100W Portable Solar Panel achieves 23.5% module efficiency compared to Solaria PowerXT 400R Pure Black's 20.5%, meaning Renogy 100W Portable Solar Panel converts 3.0 percentage points more sunlight into electricity per square meter. In practical terms, the Renogy 100W Portable Solar Panel produces 525.6 watts per square meter of panel area while the Solaria PowerXT 400R Pure Black produces 205.3 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 Solaria PowerXT 400R Pure Black delivers 400W per panel versus 100W for the Renogy 100W Portable Solar Panel, a 300W difference per module. To build an 8 kW residential system, you would need 80 Renogy 100W Portable Solar Panel panels or 20 Solaria PowerXT 400R Pure Black panels. Choosing the higher-wattage option saves 60 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
The Solaria PowerXT 400R Pure Black has a temperature coefficient of -0.34%/°C versus -0.37%/°C for the Renogy 100W Portable Solar Panel. On a hot summer day when cell temperature reaches 65°C (40°C above the 25°C STC baseline), the Solaria PowerXT 400R Pure Black retains 93.2% of its rated power while the other retains 92.6%. While the numerical gap is modest, it still accumulates over decades of summer production, especially in southern latitudes with prolonged peak heat hours.
Warranty Coverage
The Renogy 100W Portable Solar Panel is backed by a 2-year product warranty and 2-year performance guarantee, while the Solaria PowerXT 400R Pure Black offers 25-year product and 25-year performance coverage. The Solaria PowerXT 400R Pure Black provides 23 additional years of defect protection, covering manufacturing issues, material failures, and premature performance loss. Based on their published degradation rates (2.5% first year then 0.7%/year for Renogy 100W Portable Solar Panel; 1.5% first year then 0.4%/year for Solaria PowerXT 400R Pure Black), after 25 years the Renogy 100W Portable Solar Panel should retain approximately 80.7% of original output versus 88.9% for the Solaria PowerXT 400R Pure Black. This 8.2 percentage point gap in end-of-life output meaningfully impacts lifetime energy economics.
Physical Dimensions & Weight
The Renogy 100W Portable Solar Panel measures 506×376×71mm and weighs 4.8 kg, while the Solaria PowerXT 400R Pure Black measures 1812×1075×40mm at 21.5 kg. 0.19 m² of panel area for the Renogy 100W Portable Solar Panel versus 1.95 m² for the Solaria PowerXT 400R Pure Black. The Renogy 100W Portable Solar Panel is 16.7 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 334 kg. The more compact Renogy 100W Portable Solar Panel may be easier to fit on irregularly shaped or space-limited rooftops.
Specification Comparison
| Specification | Renogy 100W Portable Solar Panel | Solaria PowerXT 400R Pure Black |
|---|---|---|
| Power | 100W | 400W |
| Efficiency | 23.5% | 20.5% |
| Power Density | 48.8 W/sq ft | 19.1 W/sq ft |
| Cell Type | Monocrystalline | Shingled Mono PERC |
| Bifacial | No | No |
| Weight | 4.8 kg | 21.5 kg |
| Temp Coefficient | -0.37%/°C | -0.34%/°C |
| Snow Load | N/A | 5400 Pa |
| Wind Load | N/A | 2400 Pa |
| Product Warranty | 2 years | 25 years |
| Performance Warranty | 2 years | 25 years |
| Degradation (Year 1) | 2.5% | 1.5% |
| Annual Degradation | 0.7% | 0.4% |
| Country | China | USA |
5-Dimension Head-to-Head Analysis
1. Efficiency & Power Density
Winner: Renogy 100W Portable Solar PanelThe Renogy 100W Portable Solar Panel achieves 23.5% efficiency versus 20.5% — a 3.0 percentage point advantage. On a typical 30-panel residential roof, this translates to approximately 9.0 kW more total system capacity, or 41 kWh more annual production in an average US location.
2. Hot Climate Performance
Winner: Solaria PowerXT 400R Pure BlackThe Solaria PowerXT 400R Pure Black has a better temperature coefficient of -0.34%/°C versus -0.37%/°C. On a 45°C summer day (20°C above STC), the winner retains 93.2% of rated power versus 92.6%. The difference is modest but accumulates over 25 years of summer production.
3. Durability & Warranty
Winner: Solaria PowerXT 400R Pure BlackSolaria PowerXT 400R Pure Black leads with a 25-year product warranty versus 2 years. Solaria PowerXT 400R Pure Black degrades more slowly at 0.4% per year versus 0.7%. After 25 years, expect 80.7% vs 88.9% of original output for Renogy 100W Portable Solar Panel and Solaria PowerXT 400R Pure Black respectively.
4. Power Output
Winner: Solaria PowerXT 400R Pure BlackThe Solaria PowerXT 400R Pure Black delivers 400W versus 100W per panel — 300W more. For an 8 kW system, you need 20 panels with the higher-wattage option versus 80 panels, saving 60 panels and the associated racking and labor costs.
5. Cell Technology
Winner: Renogy 100W Portable Solar PanelThe Renogy 100W Portable Solar Panel uses Monocrystalline: Monocrystalline. The Solaria PowerXT 400R Pure Black uses Shingled Mono PERC: PERC (Passivated Emitter Rear Cell) is the current mainstream technology, offering good efficiency at the lowest manufacturing cost. Monocrystalline represents a newer generation technology with a longer performance runway as manufacturing matures.
Renogy 100W Portable Solar Panel
The Renogy 100W Portable Solar Panel is a foldable, lightweight panel with an integrated kickstand and IP65 weather resistance, designed for camping, RV trips, and emergency power. Dimensions listed are folded (506×376×71mm).
Pros
- + Ultra-lightweight at 4.8 kg for portability
- + 23.5% efficiency — high for portable class
- + Integrated adjustable kickstand
- + IP65 water and dust resistance
- + Foldable design for compact storage
Cons
- - 2-year warranty significantly shorter than rigid panels
- - Higher cost per watt than rigid 100W panel
- - Folding design less durable than rigid frame
- - Not suitable for permanent installation
Solaria PowerXT 400R Pure Black
The Solaria PowerXT 400R Pure Black is the compact residential variant of Solaria's shingled-cell panel line, delivering 400W in a smaller form factor optimized for constrained rooftops. The shingled cell architecture produces a completely uniform black surface — no visible busbars, cell gaps, or gridlines — making it one of the most aesthetically appealing panels on the market. Manufactured in Fremont, California, it qualifies for domestic content bonus ITC credits. The 400W output in a compact footprint makes it suitable for smaller residential roofs where every square foot counts.
Pros
- + Industry-leading all-black aesthetics — completely uniform surface
- + Compact size fits constrained residential rooftops
- + US-manufactured — domestic content ITC bonus eligible
- + Shingled cells improve shade tolerance and eliminate hot spots
- + 25-year dual warranty (product + performance)
- + No busbar visibility for premium curb appeal
Cons
- - 400W output lower than larger-format competitors
- - Higher per-watt cost for the aesthetic and US-made premium
- - Smaller installer network than mainstream brands
- - 20.5% efficiency is good but not class-leading
Choose Renogy 100W Portable Solar Panel If...
- ✓ Your roof space is limited and you need maximum power per panel
- ✓ Campers, overlanders, and emergency preparedness users needing a compact, grab-and-go solar charging solution.
Choose Solaria PowerXT 400R Pure Black If...
- ✓ You want fewer panels to reach your target system size, reducing racking and labor costs
- ✓ Long-term warranty protection is a top priority and you plan to stay in your home for 25+ years
- ✓ You live in a hot climate (Arizona, Texas, Florida) where heat performance matters
- ✓ You want maximum output retention over the system's 25-30 year lifespan
- ✓ Homeowners with visible roof installations who demand the best-looking all-black panel with American manufacturing and domestic content tax benefits.
Our Recommendation
The Solaria PowerXT 400R Pure Black is the decisive winner in this solar panel comparison, outperforming the Renogy 100W Portable Solar Panel in 3 of 5 dimensions. Unless you have a specific requirement that the Renogy 100W Portable Solar Panel uniquely addresses, the Solaria PowerXT 400R Pure Black is the stronger choice for virtually every installation scenario.
Frequently Asked Questions
Which is better, Renogy 100W Portable Solar Panel or Solaria PowerXT 400R Pure Black?
The Solaria PowerXT 400R Pure Black wins this comparison by a decisive margin. It delivers more power (400W vs 100W). For most residential installations, the Solaria PowerXT 400R Pure Black is the stronger choice.
Which panel is more efficient, Renogy 100W Portable Solar Panel or Solaria PowerXT 400R Pure Black?
The Renogy 100W Portable Solar Panel at 23.5% module efficiency. Higher efficiency means more watts per square foot of roof space, which is critical for space-constrained installations. The difference of 3.0 percentage points translates to approximately 300W per panel under standard test conditions.
Which has a better warranty, Renogy 100W Portable Solar Panel or Solaria PowerXT 400R Pure Black?
The Renogy 100W Portable Solar Panel comes with a 2-year product warranty and 2-year performance guarantee. The Solaria PowerXT 400R Pure Black offers 25-year product and 25-year performance warranties. Solaria PowerXT 400R Pure Black provides 23 additional years of product coverage.
Which panel performs better in hot weather?
The Renogy 100W Portable Solar Panel has a temperature coefficient of -0.37%/°C and the Solaria PowerXT 400R Pure Black is -0.34%/°C. Solaria PowerXT 400R Pure Black retains more power in heat — important in states like Arizona, Texas, and Florida. A lower (less negative) temperature coefficient is better.
How many Renogy 100W Portable Solar Panel vs Solaria PowerXT 400R Pure Black panels do I need for an 8 kW system?
For an 8 kW system: you need 80 Renogy 100W Portable Solar Panel panels (100W each) or 20 Solaria PowerXT 400R Pure Black panels (400W each). The Solaria PowerXT 400R Pure Black requires fewer panels, saving on racking hardware and installation labor.
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Last updated: February 2026