ECO-WORTHY 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.

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.

Excellent product, good material and very functional

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.

One box was a little beat up but there doesn't appear to be any actual damage to the solar panel, itself, beyond a slight ding in one corner of the frame. I won't have more info until I can install them on my boat when the weather gets quite a bit warmer.

I was debating whether I wanted to add Solar to my battery backup system for emergencies. The price of these came down low enough ($0.50/W) that I figured I should just do it. I saw some mixed comments about their performance, but decided that for the price I didn't care if they got to the full rated power. I have a set of 8 of these in series with a MPPT system at 30 deg N latitude in July. The peak power out I've managed to achieve so far is 600 W (rated 800), but I don't have them mounted at the perfect angle at this point, and while it's pretty clear, there may be some high thin clouds, so I'd say that's pretty close to specs. I will say they are _extremely_ sensitive to shading. Shading even one cell in one panel causes a very significant power drop in this configuration, but that behavior is pretty much expected for this type of setup. Assuming you can get these well mounted they are absolutely reasonable for a budget solar setup, and at 18V, you can get them working with the newer high voltage MPPT systems with a small number of cells. I'm very satisfied.

Función bien desde que lo instalé, no había instalado ninguna placa solar en la vida pero es un sistema sencillo. La única pega es su robustez, es un tanto débil, hay que amarrarlo bien con soportes adecuados o con lo que construyas tu mismo.

Product as described. Still working several years after purchase

Al momento non sono soddisfatto delle prestazioni, ma la cosa che più mi ha urtato è stato scoprire che il coperchio della scatola di giunzione era semiaperta con la guarnizione che tagliava in diagonale la scatola stessa, per fortuna non ha piovuto altrimenti addio all'impermeabilità... Comunque al momento la corrente massima che il pannello eroga con il sole che picchia al massimo (ore 13:30 del 30/09/2019) è di 1,4 Ampere --------- Aggiornamento Recensione (ore 10:45 02/10/2019), a causa della batteria già carica, ovviamente il modulo fotovoltaico non poteva erogare più potenza. Dopo aver scaricato la batteria giusto quanto basta, oggi ho potuto apprezzare una corrente di carica di 4,8 ampere quindi presumo dato l'orario e la stagione che il modulo funziona perfettamente.

Très bien, fonctionne à merveille depuis mon achat , il équipe mon garage et fournis du courant même par temps couvert

El mas economico por rendimiento, y hasta el momento funciona correctamente.