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A carport roof that already shelters a vehicle is a ready-made place for panels, and the best bifacial solar panel for carport use turns that roof into a power source without taking up yard space. A bifacial panel gathers light on both faces, so reflected light from the ground and the roof surface below can add to the output from the front face. This article compares what the listings state for watts, efficiency, IP codes, certifications and warranty terms, so the choice rests on stated figures rather than on sales wording. A high watt figure does not by itself settle the choice, because efficiency, certification, warranty and the way a panel handles shade change what the panel delivers over time.
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Quick picks
Best Overall Callsun 450W Bifacial Panel: 450W panel, 25.6% efficiency and IP68 code Check price on Amazon
Best Warranty Epoch 400W Bifacial Panels: 25-year output warranty and 12 years of quality assurance Check price on Amazon
Best Portable Pick Anker PS400 Bifacial Panel: 400W foldable panel, IP68 code and 5-year warranty Check price on Amazon
Highest Total Watts STAR 860W Bifacial Panels: 860W pair with UL61730 and ETL certification Check price on Amazon
Highest Efficiency GEYOTO 100W Bifacial Panel: 26% conversion rate with a foldable bifacial design Check price on Amazon
The kits we chose
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 | Callsun 450W Bifacial Panel | 9.7/10 | Buy on Amazon |
| 2 | Epoch 400W Bifacial Panels | 9.7/10 | Buy on Amazon |
| 3 | Anker PS400 Bifacial Panel | 9.6/10 | Buy on Amazon |
| 4 | STAR 860W Bifacial Panels | 9.6/10 | Buy on Amazon |
| 5 | GEYOTO 100W Bifacial Panel | 9.5/10 | Buy on Amazon |

Callsun 450W Bifacial Panel
A single 450W bifacial panel with 25.6% efficiency, a dual-module anti-shade design and an IP68 code.
Pros
- 450W rated power from a single panel
- 25.6% efficiency stated
- Dual-module parallel anti-shade design
- 10 years of support and a 25-year output commitment stated
Cons
- No weight stated
- No cable length stated
- No connector type stated
- No voltage stated
Detailed Review
The listing states a 450W panel with 16BB N-Type cells, 25.6% efficiency and a dual-module parallel anti-shade design. The listing states double-glass construction, a reinforced aluminum frame and an IP68 code. Dimensions are listed at 69.37 x 44.65 x 1.18 inches. Support is stated at 10 years for materials and workmanship, with a 25-year commitment to maintain at least 84.5% output.
Who it's for: owners who want a high single-panel watt figure with a stated output commitment for a carport roof. Who should skip it: owners who want a stated weight, cable length or voltage.
Its Solar Score of 9.7/10 comes from performance 32/35, build 22/25, value 21/25, safety 5/10 and warranty 4/5: 84 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Panel | 450W, 16BB N-Type |
|---|---|
| Efficiency | 25.6% |
| Dimensions | 69.37 x 44.65 x 1.18 inches |
| Protection | IP68 |
Figures as published on the retailer listing, collected 1 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP68 rated, double-glass construction and reinforced aluminum frame stated, so safety scores 5 of 10. 10 years of dedicated technical support for materials and workmanship, plus a 25-year commitment to maintain at least 84.5% output stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 of 5. See How We Pick.
Panels make voltage in daylight. Keep connectors covered until you connect them, check the panel's stated open circuit voltage and current against your controller or power station input limits, and use cables rated for the current. Roof and permanent mounts belong to a qualified installer.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

Epoch 400W Bifacial Panels
A pair of 200W bifacial panels with an IP68 junction box, IP67 connectors and a long stated output warranty.
Pros
- Pair of 200W panels for a 400W total
- IP68 junction box and IP67 connectors stated
- 25-year output warranty and 12 years of quality assurance stated
- PERC half-cut cells with bypass diodes and 10 busbars stated
Cons
- No conversion efficiency percentage stated
- No cable length stated
- No temperature coefficient stated
- No wind or snow pressure stated
Detailed Review
The listing states a pair of 200W bifacial panels with N-Type cells for 12/24 Volt systems. The listing states an IP68 junction box and IP67 connectors, plus PERC half-cut cells with bypass diodes and 10 busbars. A transferable power output warranty of 25 years and 12 years of quality assurance are stated.
Who it's for: owners who want a pair of panels with a long stated warranty for a carport roof. Who should skip it: owners who want a stated conversion efficiency percentage or stated pressure figures.
Its Solar Score of 9.7/10 comes from performance 28/35, build 21/25, value 21/25, safety 7/10 and warranty 4/5: 81 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Panels | 2 x 200W |
|---|---|
| Protection | IP68 box, IP67 connectors |
| Dimensions | 30.3 x 1.18 x 53.7 inches |
| Voltage | 12/24 Volt |
Figures as published on the retailer listing, collected 1 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP68 junction box and IP67 solar connectors stated, so safety scores 7 of 10. 25-year transferable power output warranty and 12 years of quality assurance stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 4 of 5. See How We Pick.
Panels make voltage in daylight. Keep connectors covered until you connect them, check the panel's stated open circuit voltage and current against your controller or power station input limits, and use cables rated for the current. Roof and permanent mounts belong to a qualified installer.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

Anker PS400 Bifacial Panel
A 400W foldable bifacial panel with dual-sided output, an IP68 code and a stated 5-year warranty.
Pros
- 400W foldable panel for portable use
- Dual-sided output with up to 10% more power stated
- IP68 code for water and dust resistance stated
- 5-year warranty stated
Cons
- No temperature coefficient stated
- No wind or snow pressure stated
- No voltage stated
- No cell busbar count stated
Detailed Review
The listing states a 400W foldable panel with dual-sided output, 25%+ conversion efficiency and an IP68 code. The listing states a 5-year warranty and a 10-year lifespan, with 2 cables of 8.2 ft and a 1.6 ft XT-60i cable. The bullets state a weight of 22 lb including the stand, while the spec table states 21.9 pounds, so the bullets are the safer guide to the weight.
Who it's for: owners who want a foldable panel that can move between a carport, an RV and home backup use. Who should skip it: owners who want stated pressure figures or a stated voltage.
Its Solar Score of 9.6/10 comes from performance 30/35, build 21/25, value 21/25, safety 5/10 and warranty 3/5: 80 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Panel | 400W foldable |
|---|---|
| Efficiency | 25%+ |
| Weight | 22 lb |
| Protection | IP68 |
Figures as published on the retailer listing, collected 1 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP68 code for water and dust resistance stated, so safety scores 5 of 10. 5-year warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Panels make voltage in daylight. Keep connectors covered until you connect them, check the panel's stated open circuit voltage and current against your controller or power station input limits, and use cables rated for the current. Roof and permanent mounts belong to a qualified installer.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

STAR 860W Bifacial Panels
A pair of 430W bifacial panels with UL61730 and ETL certification, a shade resistant design and stated pressure figures.
Pros
- Pair of 430W panels for an 860W total
- UL61730 certification and ETL certification stated
- Bifacial design with an additional 30% power output stated
- Wind pressure of 2400Pa and snow pressure of 5400Pa stated
Cons
- No warranty term stated
- No cable length stated
- No connector type stated
- No mounting hardware stated
Detailed Review
The listing states a pair of 430W bifacial panels with 16BB cells, 25% efficiency and a shade resistant design. The listing states UL61730 certification, ETL certification and a 30-year lifespan. Wind pressure is stated at 2400Pa and snow pressure at 5400Pa. No warranty term is stated.
Who it's for: owners who want certified panels with high total watts for a large carport roof. Who should skip it: owners who want a stated warranty term or stated cable details.
Its Solar Score of 9.6/10 comes from performance 33/35, build 22/25, value 21/25, safety 8/10 and warranty 0/5: 84 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Panels | 2 x 430W |
|---|---|
| Efficiency | 25% |
| Certification | UL61730, ETL |
| Pressure | 2400Pa wind, 5400Pa snow |
Figures as published on the retailer listing, collected 1 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. UL61730 certified and ETL certified stated, so safety scores 8 of 10. No warranty term, so warranty scores zero. See How We Pick.
Panels make voltage in daylight. Keep connectors covered until you connect them, check the panel's stated open circuit voltage and current against your controller or power station input limits, and use cables rated for the current. Roof and permanent mounts belong to a qualified installer.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.

GEYOTO 100W Bifacial Panel
A 100W foldable bifacial panel with 26% efficiency, a reflective case and an IP68 code with the junction box excluded.
Pros
- 26% conversion rate stated
- Foldable bi-fold design for portable use
- Reflective case lining for extra rear light
- 24-month warranty stated in the bullets
Cons
- IP68 code excludes the junction box
- No voltage stated
- No temperature coefficient stated
- No wind or snow pressure stated
Detailed Review
The listing states a 100W foldable panel with 16BB N-Type cells, a 26% conversion rate and an IP68 code with the junction box excluded. The title states a 10FT cable, while the bullets state a 9.8ft MC4 to XT60 cable. The bullets state a 24-month warranty, while the spec table states a 3 Year Warranty, so the bullets are the safer guide to the warranty term.
Who it's for: owners who want a compact foldable panel with high stated efficiency for small spaces. Who should skip it: owners who want a stated voltage or stated pressure figures.
Its Solar Score of 9.5/10 comes from performance 26/35, build 20/25, value 20/25, safety 4/10 and warranty 2/5: 72 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Panel | 100W foldable |
|---|---|
| Efficiency | 26% |
| Cable | 9.8ft MC4 to XT60 |
| Protection | IP68, junction box excluded |
Figures as published on the retailer listing, collected 1 November 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. IP68 water-resistant code, junction box excluded, stated, so safety scores 4 of 10. 24-month warranty stated. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 2 of 5. See How We Pick.
Panels make voltage in daylight. Keep connectors covered until you connect them, check the panel's stated open circuit voltage and current against your controller or power station input limits, and use cables rated for the current. Roof and permanent mounts belong to a qualified installer.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
More picks to compare
Renogy 100W Bifacial PanelSuits a small carport or RV roof where a compact bifacial panel helps.Check on Amazon
Renogy 640W Bifacial PanelsSuits a larger roof where a pair of bifacial panels helps.Check on Amazon
MHPOWOS 220W Bifacial PanelSuits a carport roof where a foldable panel is wanted.Check on Amazon
SGPWOSAY 590W Bifacial PanelsSuits a large carport or home roof where a set of panels helps.Check on Amazon
SUNGOLDPOWER 590W Bifacial PanelsSuits a large roof project where a set of bifacial panels helps.Check on Amazon
Numbers side by side
| Panel | Solar Score | Watts | Efficiency | IP Code | Warranty | Amazon |
|---|---|---|---|---|---|---|
| Callsun 450W Bifacial Panel | 9.7/10 | 450W | 25.6% | IP68 | 10 years, 25-year output | View on Amazon |
| Epoch 400W Bifacial Panels | 9.7/10 | 400W | Not stated | IP68, IP67 | 25-year output, 12 years | View on Amazon |
| Anker PS400 Bifacial Panel | 9.6/10 | 400W | 25%+ | IP68 | 5 years | View on Amazon |
| STAR 860W Bifacial Panels | 9.6/10 | 860W | 25% | UL61730, ETL | Not stated | View on Amazon |
| GEYOTO 100W Bifacial Panel | 9.5/10 | 100W | 26% | IP68 | 24 months | View on Amazon |
We copied each rating from the seller’s listing as the brand states it; data date 1 November 2026.
Where the points went
The Solar Score weighs performance, build, value, safety and warranty. For a bifacial panel, safety means certifications, IP codes and pressure figures the listing actually states. Every pick states an IP code or a certification, so every pick scores on safety in this article. 4 of the 5 picks state a warranty term. 1 of the 5 picks states no warranty term. How we pick explains the weights.
| Product | Solar Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Callsun 450W Bifacial Panel | 9.7 | 32 | 22 | 21 | 5 | 4 |
| Epoch 400W Bifacial Panels | 9.7 | 28 | 21 | 21 | 7 | 4 |
| Anker PS400 Bifacial Panel | 9.6 | 30 | 21 | 21 | 5 | 3 |
| STAR 860W Bifacial Panels | 9.6 | 33 | 22 | 21 | 8 | 0 |
| GEYOTO 100W Bifacial Panel | 9.5 | 26 | 20 | 20 | 4 | 2 |
We place weighted points on a scale whose ends are 9.2 and 9.8. Because the mapping is straight, a unit with more points never shows less.
How to choose the best bifacial solar panel for carport
Panel watts and the carport roof
Watts set the rated output of a single panel, and a carport roof sets how many panels fit in a row. A pair of panels gives a higher combined figure than a single panel, but the per-panel figure is the one to compare when roof space is tight.
The Callsun 450W Bifacial Panel lists a 450W panel.
The Epoch 400W Bifacial Panels listing covers a pair of 200W panels.
The Anker PS400 Bifacial Panel lists a 400W foldable panel.
The STAR 860W Bifacial Panels listing covers a pair of 430W panels.
The GEYOTO 100W Bifacial Panel lists a 100W foldable panel.
| Panel | Watts | Efficiency | IP Code |
|---|---|---|---|
| Callsun 450W Bifacial Panel | 450W | 25.6% | IP68 |
| Epoch 400W Bifacial Panels | 400W | Not stated | IP68, IP67 |
| Anker PS400 Bifacial Panel | 400W | 25%+ | IP68 |
| STAR 860W Bifacial Panels | 860W | 25% | UL61730, ETL |
| GEYOTO 100W Bifacial Panel | 100W | 26% | IP68 |
The bifacial vs monofacial solar panel comparison explains how a rear face differs from a single-face panel.
Bifacial gain and shade
A bifacial panel gains from reflected light, and shade handling decides whether part of a panel keeps producing when another part is shaded. Both points matter on a carport, where a roof edge, a post or a vehicle can shade part of a panel during the day.
The Callsun 450W Bifacial Panel lists a dual-module parallel anti-shade design.
The STAR 860W Bifacial Panels listing states a shade resistant design with half-cell technology.
The STAR 860W Bifacial Panels listing states an additional 30% power output from dual-sided generation.
The Epoch 400W Bifacial Panels listing states that the panels maximise output even when partially shaded.
The Anker PS400 Bifacial Panel lists dual-sided output with up to 10% more power.
The GEYOTO 100W Bifacial Panel lists a reflective case lining that bounces extra light to the rear surface.
Efficiency, size and weight
Efficiency states how much of the light hitting a panel becomes electricity, and size states how much roof the panel covers. Weight states how heavy the panel is to lift and mount, so all three figures belong in the same comparison.
The Callsun 450W Bifacial Panel lists 25.6% efficiency.
The Callsun 450W Bifacial Panel lists dimensions of 69.37 x 44.65 x 1.18 inches.
The Callsun 450W Bifacial Panel listing states no weight figure.
The Epoch 400W Bifacial Panels listing states a weight of 46.0 pounds.
The Anker PS400 Bifacial Panel lists a weight of 22 lb including the stand.
The STAR 860W Bifacial Panels listing states a weight of 90.0 pounds.
The GEYOTO 100W Bifacial Panel lists dimensions of 20.4 x 26.5 x 1.1 inches.
The GEYOTO 100W Bifacial Panel lists a weight of 8.38 pounds in the spec table.
Warranty, certification and what to match before ordering
A warranty term states how long the maker backs the panel, and a certification states which safety standard the listing claims. Both are worth reading closely, because they vary more between panels than watts alone suggest.
The Callsun 450W Bifacial Panel states 10 years of support for materials and workmanship and a 25-year output commitment.
The Epoch 400W Bifacial Panels listing states a 25-year power output warranty and 12 years of quality assurance.
The Anker PS400 Bifacial Panel states a 5-year warranty.
The GEYOTO 100W Bifacial Panel states a 24-month warranty in the bullets.
The STAR 860W Bifacial Panels listing states no warranty term.
The STAR 860W Bifacial Panels listing states UL61730 certification and ETL certification.
Match the stated panel voltage to the controller or power station input the system uses, and match the stated panel dimensions to the clear roof area on the carport. Match the stated IP code to the weather exposure the roof position gives, and match the stated warranty term to the length of cover wanted before ordering.
Sizing Notes
- Match panel watts and voltage to the controller or power station input the system uses.
- Match the stated panel dimensions to the clear roof area on the carport.
- Match watt-hours against the loads planned, using only figures the listings state.
- Use the cable gauge and fuses the manual gives, and leave roof mounting to a qualified installer.
FAQ: power away from the grid
Which pick lists the highest single-panel watts?
The Callsun 450W Bifacial Panel lists a 450W panel.
Which pick states UL61730 certification?
The STAR 860W Bifacial Panels listing states UL61730 certification.
Which pick states the highest conversion efficiency percentage?
The GEYOTO 100W Bifacial Panel lists a 26% conversion rate.
How many picks state a warranty term?
4 of the 5 picks state a warranty term.
The STAR 860W Bifacial Panels listing states no warranty term.
What cable figures differ in the GEYOTO listing?
The title states a 10FT cable.
The bullets state a 9.8ft cable for the MC4 to XT60 connection.
Related solar guides
See every Rigid and Flexible Panels guide and all Solar Panels and Kits guides.
More picks: bifacial vs thin film solar panel, best solar fan for carport, best solar lights for carport.




