Solar Panel Reviews
Specification-based solar panel reviews with calculated power-density and weight-efficiency comparisons. Product claims are separated from our own calculations, and purchase links go directly to product pages.
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HESC Spec Lab
Calculated Solar Panel Comparison Metrics
These figures are calculated by Highest Efficiency Solar Cell from the listed wattage, weight, and physical dimensions in our product database. They are not laboratory test results. Watts per pound helps compare portability; watts per square foot helps compare rated power density when usable area is limited. Folded dimensions and complete-kit dimensions are excluded from the area calculation because they do not represent deployed panel area.
| Panel | Rated W | Listed efficiency | W / lb | W / sq ft |
|---|---|---|---|---|
| Renogy 200W Flexible Solar Panel Flexible · Monocrystalline | 200W | 22.4% | 32.3 | 22.6 |
| Renogy 400W ShadowFlux N-Type Solar Panel Rigid · IBC | 400W | 22.8% | 9.8 | 20.4 |
| Renogy 400W Monocrystalline Solar Panel Kit Rigid · Monocrystalline | 400W | 22.8% | 8.6 | 20.3 |
| Epoch 400W Bifacial Solar Panel Rigid · TOPCon | 400W | 22.5% | 7.7 | 18.6 |
| Rich Solar 200W 12V Monocrystalline Panel Rigid · Monocrystalline | 200W | 21.6% | 8.2 | 18.3 |
| HQST 100W Monocrystalline Solar Panel Rigid · Monocrystalline | 100W | 21.2% | 7.0 | 16.5 |
| Jackery SolarSaga 100W Air Portable Solar Panel Portable · Monocrystalline | 100W | 23.7% | 9.7 | — |
| BougeRV 200W Portable Camping Panel Foldable · Monocrystalline | 200W | 23.4% | 12.4 | — |
| Renogy 200W Solar Starter Kit Kit · Monocrystalline | 200W | 21.4% | 7.1 | — |
| EcoFlow 400W Portable Solar Panel Portable · Monocrystalline | 400W | 22.6% | 11.3 | — |
“Listed efficiency” is a stored manufacturer/listing specification and is not independently measured by this site. Verify current manufacturer documentation before designing a system.
10 panels shown
WATTS
400W
EFF.
22.8%
TYPE
Rigid
CELL
Monocrystalline
Renogy 400W Monocrystalline Solar Panel Kit
by Renogy
Listed as a monocrystalline PERC panel. Treat efficiency, warranty, and electrical values as manufacturer or listing specifications that should be verified before purchase.
Who this is for
- 400W-class rated output
- Rigid format for permanent mounting
- Standard solar-system use case
Avoid if
You need a portable, foldable, or very lightweight panel
WATTS
100W
EFF.
23.7%
TYPE
Portable
CELL
Monocrystalline
Jackery SolarSaga 100W Air Portable Solar Panel
by Jackery
Listed as a portable monocrystalline panel. Verify current cell-efficiency, connector, weather-resistance, and power-station compatibility information in current manufacturer documentation.
Who this is for
- Portable folding form factor
- 100W-class rated output
- Designed for temporary outdoor deployment
Avoid if
You need substantially more solar input or require a connector standard not supported by the current model
WATTS
200W
EFF.
21.6%
TYPE
Rigid
CELL
Monocrystalline
Rich Solar 200W 12V Monocrystalline Panel
by Rich Solar
Listed as a 12V-class monocrystalline module. Verify current electrical values, dimensions, mounting requirements, and warranty terms before designing an array.
Who this is for
- 200W-class rated output
- Rigid permanent-mount format
- Common use case for RV and small off-grid arrays
Avoid if
You need a flexible or frequently moved panel
WATTS
200W
EFF.
23.4%
TYPE
Foldable
CELL
Monocrystalline
BougeRV 200W Portable Camping Panel
by BougeRV
Listed as a foldable monocrystalline panel. Verify current unfolded dimensions, connectors, weather rating, and electrical specifications with the manufacturer.
Who this is for
- 200W-class portable format
- Foldable for transport and storage
- Suitable category for power-station charging
Avoid if
You need backpack-scale weight or a permanently mounted module
WATTS
200W
EFF.
22.4%
TYPE
Flexible
CELL
Monocrystalline
Renogy 200W Flexible Solar Panel
by Renogy
Listed as a flexible monocrystalline module. Do not exceed the manufacturer-specified bend radius, and verify current mounting, temperature, warranty, and weather-resistance guidance.
Who this is for
- Low-weight flexible format
- Thin profile for constrained mounting situations
- 175W-class rated output
Avoid if
You prefer a ventilated rigid rack, frequent panel removal, or maximum structural protection
WATTS
400W
EFF.
22.5%
TYPE
Rigid
CELL
TOPCon
Epoch 400W Bifacial Solar Panel
by Epoch
Listed as a bifacial TOPCon module. Rear-side contribution is site-dependent and varies with clearance, surface reflectivity, racking, shading, season, and installation geometry.
Who this is for
- 455W-class front-side rating
- Bifacial construction can use rear-side light
- TOPCon cell architecture listed for this model
Avoid if
The module will be mounted close to an opaque dark surface or you need portability
WATTS
200W
EFF.
21.4%
TYPE
Kit
CELL
Monocrystalline
Renogy 200W Solar Starter Kit
by Renogy
Listed as a kit containing solar components intended to work together. Verify the exact controller, wiring, mounting hardware, battery requirements, and included accessories in the current listing.
Who this is for
- Bundle format can simplify component selection
- 200W-class panel capacity
- Useful starting point for learning small-system architecture
Avoid if
You already own major system components or need a larger array
WATTS
400W
EFF.
22.6%
TYPE
Portable
CELL
Monocrystalline
EcoFlow 400W Portable Solar Panel
by EcoFlow
Listed as a 400W portable monocrystalline panel. Verify the current unfolded size, weight, weather rating, connector arrangement, and power-station input compatibility before purchase.
Who this is for
- 400W-class portable nameplate rating
- Portable rather than permanent-mount format
- Relevant to large power-station charging setups
Avoid if
You need a lightweight backpacking panel or your power station cannot accept the proposed input
WATTS
100W
EFF.
21.2%
TYPE
Rigid
CELL
Monocrystalline
HQST 100W Monocrystalline Solar Panel
by HQST
Listed as a 100W monocrystalline rigid panel. Verify current dimensions, electrical specifications, weather rating, connectors, and warranty terms before use.
Who this is for
- Compact 100W-class format
- Rigid construction for permanent mounting
- Common size for small-system expansion
Avoid if
Your daily energy needs require substantially more array capacity
WATTS
400W
EFF.
22.8%
TYPE
Rigid
CELL
IBC
Renogy 400W ShadowFlux N-Type Solar Panel
by Renogy
Listed as an IBC module. Verify current efficiency, warranty, degradation, electrical, and availability information using current manufacturer documentation before designing around this model.
Who this is for
- 425W-class rated output
- IBC cell architecture listed for this model
- High-efficiency category
Avoid if
You need a portable panel or are comparing only on lowest upfront cost
Solar Panel Categories Explained
Our solar panel catalog is organized by best-use category so you can quickly find the right panel for your specific application. Here is what each category means and who it is designed for.
High-Efficiency Comparison
Panels with strong listed efficiency or power density. Compare watts per square foot, physical dimensions, temperature behavior, warranty terms, and electrical fit rather than relying on one headline percentage.
Portable Solar Panels
Foldable or deployable panels intended for temporary use. Compare deployed size, folded size, weight, connectors, weather guidance, and the PV input limits of the power station you plan to charge.
RV Solar Panels
Panels considered for vehicle-mounted arrays. Roof dimensions, shade from rooftop equipment, weight, mounting method, controller limits, wiring, and current manufacturer installation guidance all matter.
Camping Solar Panels
Portable panels for campsite charging. Compare the daily energy target, carrying weight, setup method, connector compatibility, cable length, and current weather-resistance documentation.
Flexible Solar Panels
Thin, low-weight modules intended for installations where mild curvature or low profile matters. Verify the permitted bend radius, mounting method, heat management, surface compatibility, and warranty for the exact model.
Bifacial Solar Panels
Dual-sided panels that can use reflected light on the rear face. They are most interesting when mounting clearance and the surrounding surface give the rear side useful light; actual additional energy is site-dependent.
Solar Panel Kits
Bundled solar components sold together. Check exactly what is included, controller limits, battery requirements, mounting hardware, wiring, and whether the bundle matches your planned system.
Power-Station Solar
Panels compared for portable power stations. Compatibility depends on the exact station's PV voltage, current, power, connector, and polarity requirements, not brand name alone.
Value-Oriented Comparison
Panels evaluated for practical specifications without assuming a current price advantage. Check today's retailer price separately, then compare electrical fit, dimensions, listed efficiency, and warranty terms.
Premium Panel Comparison
Higher-end panels compared by listed efficiency, warranty terms, construction, and space efficiency. Verify the current manufacturer warranty and degradation specification for the exact model.