AeternaSol 200W Bifacial Solar Panels, 2-Pack Review

AeternaSol builds this listing around two 200W N-Type bifacial solar panels, model D1440T, combining for a stated 400W of total capacity. Each panel uses 18BB full-welding silver-containing busbars on an A+ grade N-Type cell, with the title stating a 25.6% efficiency figure while the feature text separately describes approximately 25% conversion efficiency for the same panel, a discrepancy between the two stated numbers worth noting.

Bifacial construction uses a high-transparency backsheet to capture sunlight reflected and diffused from the ground as well as direct sun, which AeternaSol states can boost total power output by up to 30% compared with a traditional single-sided panel, positioning the set for RV, camping, marine and rooftop use where reflected light is available.

Weatherproofing centers on an IP68-rated junction box using potting technology to block water, steam and dust from the internal wiring, paired with a heavy-duty aluminum alloy frame that AeternaSol states resists rust and corrosion and ships with pre-drilled holes for installation without extra drilling.

Each panel is listed with dimensions of roughly 56.7 inches by 26.4 inches and about 1.18 inches thick, with a combined item weight of 42.33 pounds for the 2-panel set, model D1440T, part number 10732A. Wiring is 11 AWG, 100% oxygen-free copper rated to support up to 25A of current, finished with an MC4 connector using galvanized copper pins in a PPO shell for a higher current rating and anti-oxidation performance than an aluminum-pin connector.

AeternaSol states the panels carry ultra-low degradation, rated at 1% or less in the first year and 0.4% or less annually after that, backed by the aluminum alloy frame's rust and corrosion resistance and the IP68 junction box's sealing against moisture intrusion.

Warranty information disagrees across the listing: a dedicated warranty field states a 5-year material and workmanship warranty, while separate feature text claims 10-year seller support alongside a 25-year performance guarantee maintaining 84.5% power output through that period. Buyers relying on a specific warranty length should confirm directly with the seller rather than assume either figure alone.

Rated combined output is 400W across the 2-panel set, with each 200W panel's bifacial backsheet intended to add output from reflected and diffused light rather than direct sun alone, which AeternaSol states can raise total power by up to 30% over a single-sided panel of the same rating in a suitable setup such as a rooftop, RV or ground mount with a reflective surface beneath it.

The 11 AWG oxygen-free copper wiring and MC4 connector are positioned to minimize power loss between the panel and a connected charge controller or battery bank, supporting up to 25A of current with a UV-resistant jacket intended to hold up outdoors longer than a standard insulated cable.

AeternaSol's stated degradation figures, 1% or less in year one and 0.4% or less in subsequent years, are intended to keep output closer to the panel's rated 200W over time rather than falling off quickly, which the separate 25-year performance guarantee frames as maintaining 84.5% of original output by the end of that period.