Renogy 400W N-Type Bifacial Solar Panels

High-output fixed solar, without wasting the back side of the panel. The Renogy 400W N-Type Bifacial Solar Panel uses high-efficiency N-Type cells and a transparent rear layer to collect direct sunlight from the front plus reflected light from behind. Choose a 2-, 4-, 6-, or 10-panel package to build an 800W through 4,000W nominal array.

Here is the simple version: this is a serious rigid panel for permanent installations. It is a strong fit for cabins, workshops, ground mounts, sheds, off-grid homes, and larger RV or trailer roofs where the dimensions and weight work. Raise and tilt the panels over a light-colored or reflective surface to get the most from the bifacial design.

Why This Renogy 400W Bifacial Panel Stands Out

• 400W rated output per panel: Build more array power with fewer modules and fewer roof or rack penetrations.
• N-Type cell technology: Up to 25% cell conversion efficiency with strong performance in heat, clouds, and lower-light conditions.
• Bifacial energy collection: A transparent backsheet lets the rear side capture reflected and diffused sunlight for up to 30% additional energy in favorable installations.
• Partial-shade resilience: A dual-zone parallel design helps the unshaded half continue producing when a vent, branch, or rooftop obstacle shades part of the panel.
• 16BB construction: Sixteen busbars improve current collection while helping reduce resistance, hot-spot risk, and micro-cracking.
• Permanent outdoor durability: IP68-rated protection, a reinforced 35 mm frame, and construction engineered for long-term exposure.
• Long warranty coverage: Backed by a 10-year material and workmanship warranty and a 25-year output guarantee from Renogy.

Choose Your Pack Size

Best Use Cases

• Off-grid cabins, sheds, workshops, and remote properties
• Ground-mount and elevated rack systems with rear-side light exposure
• Flat-roof or pitched-roof solar arrays designed for rigid modules
• Larger RV, fifth-wheel, trailer, and skoolie roofs that can safely support the panel size and weight
• Battery-based backup systems using a properly sized MPPT charge controller
• Expandable 24V, 48V, and higher-voltage solar arrays designed by a qualified installer

Full Specifications — Per Panel

What Is Included

Your selected quantity of Renogy 400W N-Type Bifacial Solar Panels: 2, 4, 6, or 10 panels. Mounting hardware, charge controller, battery bank, inverter, combiner equipment, and installation wiring are not included unless specifically shown as a separate line item.

Compatibility and Array Sizing

Do not choose a solar array by wattage alone. Each panel is rated at 39.42V open circuit and 13.06A short circuit. Series wiring increases voltage; parallel wiring increases current. Before ordering, confirm that the complete array stays within the voltage, current, and wattage limits of your MPPT charge controller, inverter, or power station. Cold weather can raise open-circuit voltage, so include the equipment manufacturer's required safety margin. Large fixed arrays should be designed and installed to applicable electrical and structural codes.

Frequently Asked Questions

Is this one 400W panel or a package?

This listing is sold by package. Use the Pack Size selector to choose 2, 4, 6, or 10 individual 400W panels.

How much power is in each package?

The packages provide 800W, 1,600W, 2,400W, or 4,000W of nominal front-side nameplate capacity. Actual daily energy production varies with sun hours, temperature, shading, mounting angle, wiring, and system losses.

Does bifacial mean the panel always makes 30% more power?

No. “Up to 30%” is a best-case energy-gain figure, not guaranteed output. Rear-side gain depends heavily on panel height, tilt, spacing, surrounding shade, and how much light the surface below the panel reflects.

What is the difference between 25% cell efficiency and 21.5% module efficiency?

The N-Type cells can reach up to 25% conversion efficiency. The complete finished module is rated at 21.5% efficiency after accounting for spacing, frame area, interconnections, and other module-level factors.

Is this a portable folding panel?

No. This is a full-size rigid panel intended for permanent or semi-permanent mounting. Each panel measures 67.8 by 44.7 inches and weighs 45.42 pounds.

Will it work with my portable power station?

It may, but only if the array's complete voltage, current, connector, and wattage stay within the power station's solar-input limits. Check the input label and manual before connecting panels. An adapter may be required and is not included.

Should I wire the panels in series or parallel?

That depends on the controller's input range and the installation. Series raises voltage while current remains similar to one panel; parallel raises current while voltage remains similar to one panel. Use the electrical ratings above, account for cold-weather Voc, and follow the controller manufacturer's wiring rules.

Where will the bifacial design work best?

Elevated racks, open ground mounts, light-colored roofs, sand, gravel, concrete, and snowy areas can expose the rear side to more reflected light. Mounting the panel flush against an opaque surface limits rear-side gain.

Can partial shade be ignored?

No. The dual-zone design can reduce the impact of localized shade, but clear sun is still best. Avoid placing panels where trees, vents, antennas, or nearby structures will shade the array for long periods.