Renogy 200W ShadowFlux Anti-Shading N-Type Solar Panel, 12V 200 Watt Solar Panel 25% High-Efficiency, PV Module Power Charger for RV Marine Rooftop Farm Battery and Other Off-Grid Applications

Very nice unit, placed on top of my utility trailer and runs the ice box continuously with no problem. Controller and battery backup is necessary. Has 36 volt output,the Controller brings it down 12 volts and with some magic puts out 10 plus amps at hi noon

The Renogy 200W ShadowFlux N-Type Solar Panel is a standout choice for anyone needing reliable and efficient off-grid power. One of the most impressive features is its quick charging capability—thanks to its 25% high efficiency, it delivers consistent power even in partial shade, making it ideal for RVs, marine use, and off-grid setups.The ease of use is another big win. It’s lightweight yet durable, and installation is straightforward with pre-drilled holes that make mounting a breeze. Whether you're a beginner or experienced with solar setups, this panel is hassle-free and highly effective.I've noticed faster battery charging times compared to other panels in similar conditions, and it performs well even on cloudy days. If you're looking for a high-performance, easy-to-use solar panel for your energy needs, this one is a fantastic investment! Highly recommended.

Edit February 2019: I have 8 of these panels now and they are all working very well. Original review below.I originally purchased the kit with one of these panels, a PWM charge controller (Renogy branded), cables and mounting hardware. I slowly built up a 12V 220AH battery bank, bought one more panel and bought 50FT of 8AWG Pv cable with MC4 connectors to run between the panels on the roof and the charge controller inside the house. I bought such a heavy gauge cable because I didn't know when I could afford to purchase an MPPT charge controller and I wanted to minimize my voltage drop (and related power generation losses). The system worked very well and I was seeing just over 200W of power generation at peak from the two panels on the roof which was expected based on what I read about these. This was in February of 2014 here in central Florida. During the year the two panels and PWM charge controller did a great job keeping the batteries topped off. The summer was exciting when the panels started having a peak output of 212W. The reviews that say these panels don't put out their rated power must be people doing something wrong or they just live far north where there may be a reduction in power generation.Fast forward to December 2014 I got a 3rd one of these panels as a present from my wife, which I installed quickly and hooked in parallel with the other two to the PWM charge controller. This turned out to be a bad idea due to the voltage drop over the 50ft run of 8AWG cable at 15+ amps. The voltage was too low to bring the batteries all the way up to full.Now in January 2015 I was able to purchase an MPPT charge controller, specifically https://www.amazon.com/gp/product/B007PHMSN8/ MidNite Classic 150. This allowed me to rewire the 3 panels from parallel to series, greatly reducing the loss across the 50FT cable. It also allowed the batteries to get topped off even in low sun conditions. Unlike with the PWM controller, on very cloudy winter days the MPPT controller would still charge the batteries where the PWM controller would just trickle in a very small amount of power.I have two inverters hooked up to the system. One is on 24/7 and is used to power small electronics like laptops. It is a https://www.amazon.com/gp/product/B001539B7O/ Go Power 175W. The other inverter is a https://www.amazon.com/gp/product/B004OU99UE/ Samlex 2000W Pure Sine Wave which is only turned on when I need more than 140 or so watts continuously, or the modified sine wave of the Go Power isn't good enough.I plan to buy more of these panels in the future, and recommend them to anyone. You definetly want to buy the mounting kit as well https://www.amazon.com/gp/product/B00BR3KFKE/ since it does a good job holding the panel to a flat surface while leaving just enough room for the wires and some air circulation.

I bought this panel together with a charge controller from the same company. When testing I found that less than 50% of the solar panel output was used for charging my 12V LI battery. 1st and 2nd level support didn't help to solve the issue. Doing my own research I found that this panel has unusually high optimal output voltage of ~28V of which the PWM charge controller can use only about half (~14V for LI battery), hence the 50% power output cut to the battery. Other, cheaper panels have optimal voltage output of about 18V, which would allow higher percentage of solar power being used to charge a 12V battery. You'd need a more expensive MPPT controller, which does a kind of DC to DC power transformation to work with this panel efficiently for charging a 12V battery. It is disappointing that neither the product description mentions such limitations nor does the product support representatives seem to know such limitations and how to address them (buy a MPPT charge controller).