ALLPOWERS 400W Foldable Solar Panel SP037 - 22% Conversion

ALLPOWERS 400W Foldable Solar Panel SP037 pairs a 400W peak rating with a 22% solar conversion rate and 37.4V at maximum power. The panel page also lists IP67 waterproofing, a 2-year warranty, and a 30-day money-back window.

Power And Build

The panel uses ETFE cell lamination and polycrystalline cells. ALLPOWERS says it ships with a solar cable to XT60, a solar cable to DC 5525 plus DC 8020 adaptor, and a user manualproduct page.

The same page lists a sale price of $399.00 USD and a regular price of $699.00 USD as of 09/05/2026. It also says local delivery takes 3-5 days.

Model And Compatibility

ALLPOWERS identifies the panel as SP037 and says it works with R1500, R2500, R3500, R4000, S2000, and S2000PRO power stations. The product center page also lists AP-SP-037(400W) among the company's solar panelsproduct center.

Independent coverage from The Gadgeteer repeats the 22% efficiency figure, the 37.4V maximum-power voltage, and the IP67 rating, while also listing a 2023 review price of $699.00review.

Who It Fits

This 400W panel sits in the portable solar-panel class and is sized for power stations that accept high-voltage solar input. The included XT60 and DC adaptor cables point to off-grid charging setups, RV use, and backup power kits.

Verdict

SP037 is the specific ALLPOWERS 400W panel to track if you want the brand's foldable model with a published US sale price, named accessories, and a clear compatibility list. The combination of 400W peak power, 22% conversion, and IP67 protection defines its place in the portable-solar segment.