400W Solar Panels N-Type 4pcs 100 Watt 18V Monocrystalline

I’m very impressed with how well these solar panels are working. From the moment they were installed, they’ve been delivering steady, reliable power with no issues at all. The build quality feels solid, the output is consistent even on partly cloudy days, and the efficiency is noticeably better than other panels I’ve used in the past. What stands out most is how quickly they began offsetting my energy usage. I’m already seeing a meaningful reduction in my electric bill, and the panels stay cool and stable even during the hotter afternoons here in Southern California. Installation was straightforward, and the system integrated smoothly with my existing setup. Overall, these panels are performing exactly as advertised — dependable, efficient, and clearly built to last. I’m very satisfied with the purchase and would absolutely recommend them to anyone looking to upgrade their solar system.

These are great solar panels. I used 4 of these to set up a small off grid setup for my home office, paired with an ecoflow delta 3 plus. So far the highest output I've seen is 449 watts, and often times peaks a little over 400 watts. Excited to get a few more of these panels and a better battery system.

The panels work and were not damaged, my only worry is that they aren’t secured very well where the leads come from, but as of now they work just fine. These are my first panels so I might be skeptical over nothing. I do plan on getting more though, great price. updating about a month and a half later: ive now purchased 8 more, 12 total, and they all work great as advertised. A lot of people seem upset they dont get 100w per panel but you're only gonna get 100w if you have literally perfect weather conditions AND you have your entire setup optimized correctly. All my panels arrived undamaged and they offer to rep[lace any that are promptly. Anyone complaining is likely just making errors or expecting too much from a budget panel.

Getting the panels wired in series/parallel into the sun produced a higher voltage than seemed to be specified. They worked great but I did have to rewire the 8 panel array to cut the voltage in half. Getting excellent power from the system.

Exelent product good quality recommended

They seem to work well. I believe they may get more than 18v sometimes though.

In answer to the question of “why are my solar panels underperforming their rated capacity” I have some information that you might find useful. The rated capacity of these 4 panels is 400 watts. You probably already know that panel angle and whether the weather is sunny or cloudy can have a effect on power output. What you may not know is that how you connect your solar panels to the power station can also have a huge effect. My power station is rated at having 500 watts maximum solar input power so I assumed that I should have no problem connecting it to 400 watts of solar panels, but my power station has maximum solar input voltage of 60 volts and maximum solar input current of 15 amps. Each of the 4 solar panels has normal output voltage of not more than 12 volts but a peak output voltage of 19.5 volts and peak output current of 8.33 amps. If you connect the panels in parallel (positive of one panel to positive of the next panel and negative to negative of the next panel), the peak output voltage would stay at 19.5 volts but the peak output current would be 33.32 amps which exceeds the input current capacity of the power station. The power station would reject the current over 15 amps, so power output would be reduced by a little more than half and the excessive current could damage the power station. If you connect the panels together in series (positive of one panel to negative of the next panel), the peak output voltage of the 4 panels would be 78 volts and the peak output current would stay at 8.33 amps which exceeds the input voltage capacity of the power station. Power output would be reduced by about a quarter and you would again risk damage to the power station. In this example, I should be able to maximize power output by connecting the panels in series using a solar power controller. There are two types of solar power controllers, PWN and MPPT. PWN controllers are cheaper but they only reduce the voltage without a corresponding increase in the amperage so you lose power output. The MPPT controllers cost more but they increase amperage as they decrease voltage with no loss in power output. I have ordered an MPPT controller and am optimistic of getting optimal power production.

great value in solar panels