220W Portable Solar Panel, IP67 Waterproof Foldable 20V Solar Charger, High 23.5% Efficiency for Portable Power Station, Outdoor Camping, RV

We were genuinely impressed with this 220W rated portable solar panel right from the start. When first connected to our EcoFlow River 2 Pro power station around 9 am on a mid-April day (~65°F ambient), it immediately registered 200 watts (see photo) – already exceeding expectations. As the panel warmed up in the sun, the output stabilized at a very respectable 183 watts. This real-world performance (ranging from approx. 83% to 91% of its rated maximum under these conditions) is excellent. RV Integration & Voltage Advantage: Our primary reason for getting this panel was to augment the 1000W rooftop solar array on our RV (featured on our YouTube channel), especially when parked in partially shaded spots. This panel's output voltage (around 40V) is a major advantage for us. It allows us to wire it directly in parallel with our existing 40V rooftop panels using the same solar charge controller – something panels with lower voltages couldn't do efficiently. The higher voltage also means lower current for the same power, allowing for potentially smaller gauge wiring runs if needed. Important Note for RV Integration: This parallel connection works well because our existing rooftop panels operate at a similar high voltage (~40V). If you intend to parallel this panel with an existing RV solar array, you MUST ensure your existing panels have a compatible voltage (specifically, a similar Voltage at Maximum Power or Vmp). Many traditional RV solar panels are lower voltage (e.g., 12V nominal, with Vmp often below 24V). Attempting to connect this high-voltage (~40V) panel in parallel with significantly lower-voltage panels will result in poor performance, as the system's output will likely be dragged down towards the lower voltage, severely limiting the power harvest from this panel. Check your existing system's specifications carefully before purchasing this panel for parallel integration. Performance & Temperature Effects: The panel performed admirably in charging tests, taking our EcoFlow River 2 Pro (768Wh) from 42% to 100% in about 2.5 hours, perfectly matching the ~183W sustained input observed. Curious about the drop from the initial ~200W to 183W as it heated up, I did a quick test. With the panels measuring around 125°F in the sun and producing 183W, I misted them with water, cooling them to about 100°F. The output immediately jumped to 192W. This clearly demonstrates the impact of heat on solar panel efficiency, governed by the Temperature Coefficient of Power. While I don't know the specific coefficient for these panels, observing 183W even at 125°F panel temperature is still very strong performance. Further testing on hotter summer days will be interesting, but based on this, the output is great. Physical Design & Features: Portability: The panel folds up neatly and is reasonably portable. While I didn't weigh it precisely, it felt lighter than our EcoFlow River 2 Pro and likely close to the stated ~13 lbs specification – quite manageable. Connectors & Adapters: It uses standard MC4 connectors, and the included adapter cable set is very versatile, seemingly having a connector for most common power station inputs. The storage pouch holds the cables well with extra room. Kickstands & Angling: The integrated kickstands work well for tilting the panel steeply towards a lower sun (e.g., morning/evening/winter). However, we noted a limitation: the strap connecting the leg to the panel restricts how far back the leg can go. This makes it difficult to get the panel to lay flatter (more parallel to the ground) which is needed for optimal alignment when the sun is very high overhead (like midday summer sun, common here in Southern California). This might require propping the front edge up slightly with boards (which we usually carry) in those specific high-sun conditions. Fasteners: The hook-and-loop fasteners that hold the panels closed are very strong. This is secure, but use caution when opening/closing, as they feel strong enough that they might cause wear on the fabric attachment points over time. Shading: As another reviewer noted - this entire thing is wired up in series - this means that even a little shading is going to have a big effect on power delivery. As a test, while it was producing 183 watts of power constantly, I shaded a small part of the panel with my phone (not a big phone, either). Power output dropped to the 90s. I moved the shaded part around and it was pretty consistent. If you block an entire panel the power drops to almost nothing. Overall: This is an excellent portable solar panel delivering impressive real-world wattage, achieving a high percentage of its 220W rating even under normal operating temperatures. The ~40V output is a huge plus if you need to integrate with existing higher-voltage RV systems (check compatibility first!). While the kickstand design might limit achieving a perfectly flat angle for peak summer sun without minor propping, its overall performance, portability, and useful voltage make it a fantastic option. Highly recommended for those needing substantial portable solar power, especially if the high voltage suits your specific setup.

Excellent Mhpowos solar panel! It charges devices efficiently, even in partial sunlight, and feels sturdy and well built. Lightweight, easy to carry, and perfect for camping, travel, or emergencies. Great performance and great value—highly recommended!

I love it! I took it out and placed it in the sun with two panels facing optimally and two panels facing at an un-optimal angle to the sun just to see how it would do with only half the panels aligned to the best sunlight and it immediately started running at 352w,that is very impressive that a 400w panel ran at 352w even with two of the four panels incorrectly aligned to the sun! I could not be more impressed.You are usually lucky if a solar panel performs at 50% of its stated power output and this one performed at around 88% with only half the panels aligned correctly to the sun.Amazing! This panel will be able to fully charge my 1536wh solar generators in around only 3 hours and will be able to keep them topped off at 100% even while the generator is being used to power up to 350w of appliances! I could not be happier with the purchase,both the performance and the amazingly low price make this panel a WINNER! It also came with a nice long power chord and a 7 connector adapter so it will plug into just about any appliance or generator! I highly recommend this product!

First impressions are good. I ordered the 40 volt, 220 watt model. Out of the box, on a full sun day at noon my Ecoflow hub reported 180 watts (the highest I saw) which was good for these things. In the evening sun, around 4pm it was generating just over 140 watts. The stands are the same annoying ones used on most cheap solar panels, they work, but will suck in (retract) themselves if you lift or move the panel. Not as nice as metal stands. The hanging loops are cloth rather than metal gromets so I have not figured out a secure way to lock it to a fixed object, although you could hang it until those cloth loops break. In general the cloth frame around and between the panels is thin and I wonder if it will hold up over time or fray and fall apart. Never forget that Amazon's owner helped to pay for the demolition of the people's house.

Great quality and easy to set up

Does the job, has all the connectors built in to plug to the powerstation. It a little heavy and annoying to use, but I assume they are all similar. I peak out around 180 watts of input. If I follow he sun, it can fill a 1kwh power station on a sunny summer/fall day.

Solid Solar Panel. Works

Nice panel, longer standard cable than my 200w panel, but they shipped me a used one. Clip was broken on one side of the main connector wires from the panel when I took it out of the box.