Anker SOLIX 440W vs 410W Rigid Solar Panels: What Changed and Is It Worth It?

Anker no longer sells its 410W rigid solar panel on its own in the US. The product page that used to carry it now sells the 440W rigid panel, Anker’s current rigid option for SOLIX stations like the F3800, F3800 Plus, F3000 and the E10 home system. (A panel with the same electrical specs as the 410W still appears under a “405W” name in some E10 bundles.) So what actually changed, and does it matter for your setup?

This comparison goes through what Anker publishes for each panel: rated power, efficiency claim, bifacial design, weather rating, warranty, size and electrical specs. It then works out how many 440W panels each SOLIX station can take within its voltage and current limits. Every figure comes from Anker’s product pages and manuals.

Quick Verdict

The 440W is a real but modest upgrade. Rated power goes from 410W to 440W (+7.3%), the panel becomes bifacial (Anker quotes up to 30% more energy from the rear side), and the linear performance guarantee grows from 25 to 30 years. Several things did not change: Anker advertises the same “up to 25%” conversion rate for both panels, both are rated IP68, both carry up to a 10-year product warranty, and the footprint is almost identical.

The 410W is no longer sold on its own, so for a new rigid array the 440W is the default choice. The more relevant question is whether 410W owners have a reason to replace panels that still work. In most cases they don’t: the gain is 30W of rated power per panel, plus whatever the rear side adds in your installation.

Quick Specs: 440W vs 410W

For a broader look at all portable and rigid options from PS100 through the 440W, the complete panel lineup comparison covers every model in the current SOLIX catalog. The table below focuses specifically on the two rigid generations.

The biggest practical change is the bifacial design, followed by the 30W gain in rated power. The efficiency claim did not move: Anker advertised “up to 25%” for the 410W as well. Working from Anker’s own power and size figures, the 440W delivers about 22.5% of standard test sunlight per square meter of panel, against about 21.0% for the 410W, so the “up to 25%” most likely describes the cells rather than the whole panel.

The 440W Panel: What’s New

The 440W replaced the 410W on the same Anker product page, and the changes are narrower than the name suggests: more rated power, a bifacial design and a longer performance guarantee. The size, the weather rating and the advertised efficiency stayed the same.

Performance data for the 440W is covered in depth in the full 440W panel review. This article focuses specifically on what changed from the 410W and what those changes mean in practice.

The jump from 410W to 440W is a 7.3% increase in rated power per panel. The footprint is practically unchanged (1,722 x 1,134 mm against 1,723 x 1,135 mm), so an array laid out for 410W panels takes 440W panels without layout changes. The 440W is a little heavier, at 46.3 lb against 42 lb (19 kg) for the 410W. Its open-circuit voltage is also higher, 39.16V against 37.41V, which matters when you count how many panels a station’s voltage limit allows in series.

Bifacial Technology: The Real Upgrade

The bifacial design is the most significant change between the two panels. Anker describes the 410W as an all-black panel and never presents it as bifacial. The 440W collects light on both faces, using the rear surface to catch diffuse and reflected light from the ground or mounting surface below.

Anker says the 440W can capture up to 30% more energy from its rear side under optimal conditions. Understanding what “optimal” means is important before factoring this into system sizing.

Rear-side gain depends heavily on installation geometry. Ground-mount arrays elevated 12-18 inches above a light-colored substrate (concrete, gravel, white membrane) see meaningful bifacial gains throughout the day. Rooftop installations flush to a dark-colored roof with no clearance see near-zero rear contribution. Elevated racking on a reflective rooftop surface falls somewhere between those extremes. If your planned installation is a flat, close-mounted rooftop array, the bifacial specification matters less than the extra 30W of rated power. If you’re planning a ground-mount with proper elevation, the 30% rear-side figure becomes a real part of your energy calculation.

Weather Rating: IP68 on Both Panels

IP ratings use two digits: the first covers dust (6 means dust-tight), the second covers water. Anker rates both the 410W and the 440W IP68, so weather resistance is not a reason to upgrade.

For panels that stay outdoors year-round, the installation matters more than the rating: sealed cable runs, MC4 connectors kept out of standing water, and mounting hardware rated for your wind and snow loads. That applies equally to both generations.

Which SOLIX Stations Work Best with the 440W Panel

The F3800 has two XT-60 solar inputs, each rated 11-60V and 1,200W, for 2,400W in total. A 440W panel has an open-circuit voltage of 39.16V, so two in series reach 78.3V, above the limit: Anker’s F3800 FAQ says a series string must stay at or below 60V, and its manual warns that higher voltage will damage the station. That leaves one panel per input (880W in total) or two in parallel per input. Two 440W panels in parallel draw about 26.5A at full power, which fits the 27A per input Anker lists for F3800 firmware 2.1.1 or later, but not the 25A on its spec sheet. Five or six panels can’t be connected to an F3800 within Anker’s limits.

The F3800 Plus and the F3000 suit rigid panels better because they have 165V inputs. Four 440W panels in series reach 156.6V, within that limit. The F3800 Plus has two such inputs (1,600W each), so it takes up to eight panels. The F3000 has one 165V input (1,600W) that takes four panels in series, plus a 60V input (800W) that takes one more, for five in total. Anker doesn’t publish the 440W’s temperature coefficient, and open-circuit voltage rises as panels get colder, so a four-panel string has less margin under 165V on a freezing morning than the 156.6V figure suggests.

The E10 home system works differently. Each E10 power module has two solar inputs rated 30 to 450V, 15A and 4.5kW. Anker’s manual sizes strings with a simple rule, 4,500W divided by the panel’s wattage, which gives about 10 panels of 440W in series per input (391.6V). Anker’s E10 FAQ recommends an open-circuit voltage under 38V for 400W panels and under 42V for 460W panels; the 440W, at 39.16V, sits between the two.

For a complete analysis of how rigid panels pair with the full Anker SOLIX ecosystem, including the full Anker SOLIX brand review covering every product line is the right starting point. For guidance on mounting configurations, wiring setups, and pairing strategies, the rigid panel setup guide goes deeper on installation.

The C-series stations are a weaker fit. The C1000 Gen 2 accepts 600W of solar and the C2000 Gen 2 800W, each on a single 60V input, so neither can take two 440W panels in series (78.3V). Two in parallel would also exceed their current limits (14.5A on the C1000 Gen 2, 17A on the C2000 Gen 2), so one 440W panel per station is the setup that stays within spec. The C800X is no longer sold by Anker in the US, and the C300X only accepts 11-28V, too low for a 440W panel. For C-series stations, Anker’s portable PS200 and PS400 panels are the better match.

Wiring Configuration and System Integration

Whether to wire in series or parallel depends on your station’s voltage input range. The series vs parallel wiring guide explains the math behind each approach in full. The short version for 440W rigid panels: series wiring adds voltage (39.16V of open-circuit voltage per panel), parallel wiring adds current (about 13.25A per panel at full power). Stations with 60V inputs, like the F3800 and the C-series, can’t take two 440W panels in series. Stations with a 165V input, like the F3800 Plus and the F3000’s high-voltage port, can take up to four.

Ready-made 440W bundles are also available through the solar generator kits page, which lists pre-configured pairings with F3800, F3000, and E10 systems. Check the box contents before you order: Anker’s main 440W 2-pack page currently lists only the two panels, while its second 2-pack listing still includes four MC4 cables and an MC4-to-XT-60i cable.

Should 410W Owners Upgrade?

The 410W panel is discontinued but not incompatible. Both generations connect with standard MC4 cables, so 440W panels can join an existing 410W array. There is no compatibility break between the two generations. Existing 410W systems continue to operate normally.

The upgrade math for 410W owners works like this: replacing 6 panels rated at 410W with 6 panels rated at 440W adds 180W of nominal capacity to the array. The bifacial rear-side gain adds additional output on top of that, depending on installation geometry. For a system already producing adequate daily energy, that improvement doesn’t justify the cost of full panel replacement. For owners who are expanding an existing array and adding capacity, buying 440W panels for new positions while retaining 410W panels in established slots is the more practical approach. Mixed arrays work as long as each string stays within your station’s voltage and current limits.

Verdict and Who Should Buy

For anyone building a new SOLIX rigid panel system in 2026, the 440W is the default choice and a solid one. The improvements over the 410W are real but narrow: 30W more per panel, a bifacial rear side and a 30-year performance guarantee. In early October 2026, Anker listed the 2-pack at $1,289.99 (with frequent sales) and a 10-pack at $3,499, which brings the cost per panel down sharply for larger arrays.

Existing 410W owners running a complete, correctly sized system have no urgent reason to swap. A functioning array that meets your daily energy needs doesn’t need new panels. If your system is undersized, 440W panels can be added alongside existing 410W hardware, within your station’s voltage and current limits. You can find the official 440W rigid solar panel page on Anker SOLIX directly for current bundle configurations and availability.

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Originally published: April 6, 2026