It checks today's price at every store, compares the alternatives and answers in about a minute.
The ALLPOWERS SP037 is a foldable 400-watt solar panel built to charge large portable power stations such as the ALLPOWERS R1500 LITE, R2500, S2000 PRO and R4000. Its monocrystalline cells convert up to 25% of sunlight, which is high for a folding panel, so it needs less surface area for the same output. It folds to roughly 36.8 x 23.6 x 2.4 inches and carries an IP67 dust and water rating, making it a practical choice for RV roofs, campsites and off-grid setups. Against rigid 400W panels it trades some peak output per dollar for portability; against smaller folding panels it delivers far more power but is heavier and bulkier to move.
In stockReturn policy
Rated 4.6 out of 5 from 127 ratings, buyers generally report solid charging performance and sturdy construction. Complaints tend to center on weight and real-world output falling short of the 400W rating in less than ideal sun.
The ALLPOWERS SP037 is a 400 watt foldable portable solar panel for charging portable power stations. It works with large solar generators including the ALLPOWERS R1500 LITE, R2500, S2000 PRO and R4000. It can be mounted on a motorhome roof, set up at a campsite, or placed on a balcony or rooftop.
The panel uses monocrystalline cells that convert up to 25% of sunlight into electricity. It is built with multiple layers of flexible EVA and reinforced glass fibers. It is IP67-rated against dust and water ingress and made to withstand rain, snow, dust and heat.
The panel folds down for transport and storage in an RV, camper van or car trunk. To use it, plug it in, unfold it and charge.
