A 400W solar panel is a strong choice when roof space is limited and you want maximum power per panel. Four are in stock from $700, including the Anker SOLIX 400W 48V PS400, a Sungold Power 440W N-Type panel certified to UL61730, and a two-panel Anker 440W rigid set. Rigid panels belong on roofs and ground mounts, while the portable PS400 can move with you. Check the voltage and dimensions on each listing, then match them to your controller. Free shipping to the contiguous US applies, and sizing help is available.
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The 400 w solar panel is the most common single size in residential and off-grid solar today, because it hits a practical balance: enough output that four panels run a cabin or a small home's essentials, and a frame two people can lift onto a roof. This collection groups everything at or near 400W, which means three different product types: rigid framed modules for roofs and ground racks, folding portable panels for power stations, and pallet-quantity modules for larger installs.
Seven products from Anker, Sungold Power, Rich Solar and EcoFlow are listed, priced from $469 for a single rigid panel to $2,599 for a pallet. Ratings run from 400W to 440W per panel, with cell efficiencies between 22.4% and 25% and warranties from 2 years on folding panels to 30 years on the Sungold Power N-type module.
| Product | Key numbers | Best for | Price from |
|---|---|---|---|
| Anker SOLIX PS400 400W Portable | 400W, 48V, 23%, 2-year warranty | Recharging a power station at camp | $700 |
| Sungold Power 440W N-Type | 440W, IP68 junction box, UL61730, 30-year warranty | Home, cabin or hybrid arrays in any quantity | $885 |
| 2 x Anker SOLIX 440W Rigid Set | 2 x 440W = 820W, 25% efficiency, 25-year warranty | RV roof or small off-grid pair | $1,000 |
| Rich Solar MEGA 400W 24V (pallet) | 400W, 108-cell, 23.2%, 45.2 lb, 25-year output warranty | Grid-tie or off-grid arrays of many panels | $2,599 |
What is the best 400w solar panel for an RV roof? The 2 x Anker SOLIX 440W rigid set gives 820W from two modules at 25% efficiency, which uses roof space well. For a trailer that parks in shade, the folding PS400 you carry into the sun is the better companion.
How many 400W panels for a cabin? A cabin using 3,000Wh a day typically needs three to four 400W-class panels in most of the mainland US, more in the north in winter. The calculator gives a number for your ZIP code.
Are 400w solar panels for sale here suitable for grid-tie? The Rich Solar MEGA 400 is listed as grid-tie and off-grid compatible, and the Sungold Power 440W as on-grid, off-grid or hybrid. The folding PS400 is for power stations only.
Every panel here ships free to the mainland US from our brand partner warehouses, usually within a few business days, with 30-day returns. Call us if you want help choosing between a rigid pair and a full pallet.
