Guide
590W Bifacial Solar Panels: Are They a Fit for Mobile & Manufactured Homes?
What a 590W bifacial panel actually is
A 590W bifacial panel is a large-format solar module that generates power from both its front and rear faces. Instead of the opaque plastic backsheet used on a standard residential panel, bifacial modules use a second sheet of tempered glass on the back. Light that passes between the cells, plus sunlight reflected off the ground (the "albedo" effect), reaches the rear silicon layer and produces extra electricity that a one-sided panel simply throws away.
Most 590W modules on the market use 144 half-cut N-type TOPCon or P-type PERC cells wired in a multi-busbar layout. Splitting each cell in half cuts internal resistive losses by roughly 75%, which is part of why these panels post front-side efficiencies between 21.2% and 22.84%, depending on the manufacturer.
The number that matters most for bifacial math is the bifaciality factor — the rear panel's power output as a percentage of the front's. It varies by cell chemistry:
- P-type PERC bifacial: 70%–75%
- N-type TOPCon bifacial: 80%–85%
- Heterojunction (HJT) bifacial: 90%–95%
That rear-side gain isn't fixed — it depends entirely on what the panel is facing. Mounted 1.0–1.5 meters above white gravel or a white membrane, a 590W TOPCon panel with an 80% bifaciality factor can behave like a 660–680W panel in real-world output. Mounted flush over dark grass or asphalt, the gain drops to single digits.
How a 590W bifacial panel compares to a standard residential module
These are not the same category of hardware as the 400–440W panels typically sold for home roofs. Here's how a Tier-1 590W bifacial module stacks up against a standard 440W residential panel:
| Spec | 590W Bifacial (N-type TOPCon) | Standard 440W Residential | |---|---|---| | Module efficiency | 21.8%–22.84% | 21.5%–22.5% | | Bifaciality factor | 80% ± 5% | 0%–80% | | Dimensions | ~2,278–2,384 × 1,134 × 30 mm | ~1,722 × 1,134 × 30 mm | | Weight | 31.0–33.5 kg (68–74 lbs) | 20.8 kg (46 lbs) | | Glass | Dual 2.0mm + 2.0mm | Single 3.2mm or thinner dual-glass | | Wholesale price | $0.11–$0.23/W (bulk) | $0.30–$0.40/W (retail) | | Turnkey installed cost | $2.65–$2.85/W (ground-mount) | $2.50–$2.75/W (roof-mount) |
The wattage-per-panel advantage is real — fewer panels for the same array size, and a lower raw hardware cost per watt at bulk pricing. But that comes bundled with nearly 2.5 feet more length and 50% more weight than the panels most mobile home installers actually use.
Can you actually put one on a mobile home roof?
This is where the math gets uncomfortable. Manufactured homes built to HUD code (24 CFR Part 3280) have engineered roof live-load allowances of 20 PSF in southern climate zones, 30 PSF in the middle zone, and 40 PSF in the north. Roughly 4 PSF of that is already spoken for by drywall and insulation, and the remaining allowance is meant for wind, rain, and snow — not permanent equipment.
A bare 590W bifacial panel works out to about 2.46 PSF of static dead load on its own (31 kg over 2.58 m² of panel area). Add aluminum rails, mounting feet, and hardware and the installed load climbs to 3.5–4.5 PSF, concentrated as point loads through a handful of lag bolts into thin, lightweight roof trusses. In a southern HUD zone with only ~16 PSF of live-load reserve after the ceiling load is accounted for, that single panel can eat over a quarter of the structural margin — before wind uplift on a panel with nearly 8 feet of exposed length is even factored in.
There's also a bifacial-specific problem: mounting the panel flush to a roof (the only realistic option on a mobile home) blocks the rear glass from seeing any reflective light. Standard roofing materials — dark shingles, weathered metal, EPDM membrane — have an albedo of just 0.05–0.15, so a roof-mounted bifacial panel gives up almost all of the bifacial advantage it was bought for.
The practical answer: ground-mount it
For mobile and manufactured homes, the workable path for 590W bifacial panels isn't the roof — it's a dedicated ground-mount array, solar carport, or shade structure next to the home. Ground mounting:
- Moves the panel's 31+ kg dead load off the HUD-rated roof structure entirely, onto ground screws or a concrete footing
- Lets you elevate the array 1.0–1.5 meters above a light-colored surface (crushed white gravel, light concrete, a white membrane) to actually capture rear-side gain
- Avoids the wind-uplift and installer-safety issues of walking 75-lb glass panels across a sloped, low-strength roof deck
Under those conditions, real-world annual energy yield for bifacial panels runs 8%–25% higher than an equivalent monofacial array, and the levelized cost of energy for a ground-mount bifacial system has been estimated around $0.048/kWh, versus roughly $0.065/kWh for a standard rooftop monofacial system over a 30-year system life — a meaningful gap if you're sizing a system to run a manufactured home off-grid or with heavy battery backup.
For most mobile home roofs, the more realistic hardware choice remains a 400–440W single-glass monofacial panel under 45 lbs, mounted along load-bearing wall lines rather than mid-span trusses. Save the 590W bifacial modules for a ground array where their size and weight stop being a liability.