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

Eco-worthy makes fantastic protects. I have now installed 600 watts of their solar on my 1000 watt system, and can honestly say these panels perform excellently. I have tried them independently of my other panels and they all put out above the rated capacity. I charge my batteries up with in a couple of hours now thanks to my solar setup. I do plan on buying two more panels to make my siren 1200 watts total. For the price of these panels you really cannot find anything better.

Great set of panels, easy to install and easy to maintain. Size and weight ratio is good considering the quality of the panels. Output seems to be great so far.

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.

Please note that this product requires something called well nuts to connect it to campers, RVs or boats. Also note that well nuts do a terrible job in high winds. Mine blew off during high winds while coming up from Thatcher to Phoenix after an event. My suggestion is to bolt it down to a camper roof rack. I bought one and I bolted it fast to it and that is not coming off. Do not trust well nuts!Other than that, these things work perfectly. I bought this to mount my replacements on. Much sturdier.https://www.amazon.com/dp/B0896XJQN6?ref=ppx_pop_mob_ap_share

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.

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.