400W Solar Panels 4pcs 100 Watt 18V Monocrystalline Solar Panel Module for Off Grid PV Power for Home, Camping, Boat, Shed Farm, RV,12V Battery,2-Pack 2 * 100W

is a "DIY/semi-professional" level panel/kit that is positioned as economical, with good assembly equipment, with quality frame and glass materials, and designed for off-grid, farm, light house, etc. uses. Aluminium frames wider than usual (35 mm vs ~30 mm) which improves stiffness. Low-iron 3.2 mm glass that improves light transmission and resistance. Good wind and snow resistance in field trials. "high conversion efficiency" and good performance even under suboptimal conditions.

Excellent product, good material and very functional

I have purchased quite a number of these panels and I’m finally getting around to submitting a review. I've tested a range of panels now, including Renogy, Goal Zero, no-name brands. And these panels have generated relatively the same amount of energy as the rest. I typically expect 70% of the rated output as a performance target, and these panels had no problem reaching 70 Watts. On cold days with perfect sunshine I’ve gotten up to 90 watts, but this isn’t something I count on. The panel size and cable length is also on par with the other brands, so there isn’t much to differentiate it from them EXCEPT for the price, which is amazing. I bought these on sale for $46.50 / panel, not expecting much, but I have been very pleased with them. In comparison, the name brands are easily $120+ / panel. So cost per watt is just amazing! I’ve been using them for about a year now, without any noticeable deterioration or performance issues, so we’ll see how they do in the long run.

Easy to mount, Ok price per watt, lightweight, relatively sturdy, pushes about 63% of rated power on a good sunny day with minimal cloud cover at an oblique angle to the sun, I've bought this same item 3 times, and I'm happy so far.

These do not come with mounting hardware. Otherwise work well

We recently had hurricanes in Florida lucky not much happen where live except the neighbors lost power because our retention pond flooded the road and up our front lawns it flooded theirs on the ground transformer but it didn't flood our on the ground transformer so we didn't lose power. I was lucky but made me think about next season and the fact my wife is recovering from a stroke in bedridden until she gets back use of right side at least her mind ok, slow recovery. But in the past, we been days without power and once 12 days without power but had lots of sun after storm passes. So getting some panels and a Solar power station (EcoFlow Delta 2 Max $950 on sale) that I can run some stuff for her like the TV and Fans and adjustable bed and a few mini fridges until power comes back online. I order first set and got them working with the power station, the power station can take 2 solar inputs so order another 2 set of these. The power station input is 11-60 volt and 15amp max so I can put 2 panel in series with 44 volts 5.5 amp max and then put 2 set of series in parallel for 44 volts 11 amps max I was getting real world 338 watts input to the power station so that like 84% of 400watts rated in full sunlight not bad at all. I only need 1 more set but I bought another smaller power station that only has one solar input because the DEAL on it was too good to pass a 1024ah 1800w output EcoFlow Delta 2 black Friday for $399. So now I have 1200 watts max but really real word more like 1000+ to change my two power stations. 1 set of 4 $199, the next 2 sets of 4 $189. They are very well made and sturdy and are package really well, I only had to file down a few spots at the corners that had little sharp edge to it other than that Great Panels.

Used these to replace my old Renogy 100w panels They worked fine with my charge controller and are even slightly smaller than my old ones. When I expand my system I will almost certainly buy more of these same Eco-Worthy panels.

Deceptive advertising. These are not 100w panels as they only put out a max of 75w. I purchased 16 of these and unfortunately had already installed 8 of them before realizing that my control charger was only getting 300w per 4 panels, 600w total… in full sun. My other brand 100w panels (set of 4) was doing 400w. These are mounted 8 inches from the Eco-worthy panels capturing the same sun. The separate reading were from 2 BougeRV 30 Amp Chargers also sitting side by side on my power board and switching inputs between the chargers.