Renogy Bifacial 115 Watt 12 Volt Solar Panel Monocrystalline Rigid High-Efficiency PV Module Power Charger for RV Marine Rooftop Farm Battery and Other Off-Grid Applications

Best PV Panels on the market! Unfortunately Renogy customer service sucks!

On a cloudy afternoon I was getting 90 off the front and 80 with the back facing the sun 👌😎

The Renogy 220 watt panel production is fine. I could not get the male panel mc4 connector to snap into my Windy Nation Extension cables. The panels mc4 connectors snap into panel to panel just fine. The mc4 connectors snap into Renogy extension cables just fine but I could not get them to snap into other brand mc4 extension cables. Using other brand extensions they would pull apart. Be sure and buy Renogy extension cables if needed as not to have mc4?connection issues. In my opinion mc4 connectors should be standard mc4. Connecting the panels end to end long wise the cables were just a few inches short and I had to use a short extension mc4 cable between them.

Decent panel, but don't expect any miracles with the performance. I bought 2 of these and run them in series to charge an EcoFlow Delta 2. The max performance on a clear Colorado winter day was 190w per panel... So 86% of the rated amount. Really not bad at all, but in similar conditions I have seen the EcoFlow 220w bifacial panels make more than their rated amount. Certainly not a scientific comparison...just noticed better output from the EcoFlow. I like these Renogy panels better than the folding EcoFlow version because I want something I can leave outside without worrying about the high altitude UV destroying them.The biggest issue is the connection cables. The other reviewer that said the MC4 connector has a problem is right. The connector is built for a permanent install and you can't get to the little retaining clips to release them unless you use 2 small screwdrivers. You could cut the extra plastic "bridge" piece out so it will function like a normal MC4 or even crimp on a regular MC4 if you will be connecting and disconnecting them regularly. I don't know why they would do that. Not a deal breaker, but something to be aware of.Also with the cables in the middle of the panel they did not make the cables long enough to connect in in series when mounted in landscape orientation so if you plan on doing that you will need an extension. If they would have just made them 6" longer it would work with a bit of wiggle room. They work great if you are mounting them in portrait orientation.I will likely buy 2 more of these to complete my system despite the issues I mentioned here if they go on sale again.I will update the review once I can do more performance testing. Seems good enough for now.

Wildly impressed with this panel in early testing. Pulling rated 220W by 12pm in traditional/flat mount orientation with a 60A MPPT SCC, not taking into account bifacial reflection. Will be running some more tests in a proper mounting style for this bifacial panel, but so far I’m impressed. Daily averaging about 12.5 amps output at 15.6V (195W) so far.

I bought two of these panels a year ago this month. I set them up as a series @24vdc and tied them in to a solar combiner box. A month later, I found a competitor panel that was a hundred dollars less, bifacial and with similar output at 200w each. Because of the price difference, I purchased four of the competitor panels and also tied them in to my solar combiner as a series @24vdc.Two Renogy 220w bifacial and four 200w competitor panels, all 24vdc. Each pair ties in to the combiner as a separate circuit so I can isolate them in pairs or combine them all for a total of 620w@24vdc, assuming peak conditions.This summer, weather has been outstanding with moderate ambient temperatures of 80-85d(f) with no wind, no clouds and full direct exposure to the sun. All panels were cleaned of any debris (like I said it’s been a year), washed down with cold water and put under test. It’s important to also know that all panels have the same 14ga stranded outdoor conductors paired with soldered MC4 connectors. An ohm test was done before testing and all wiring showed equal results: no resistance.With that out of the way, I initiated my test. I had all the breakers in the combiner box turned off the night before so I started my test at 11am when the ambient temperature was observed at 76d(f). Circuit 1 is for the Renogy pair, circuit two and three are for the competitor pair respectively.I turned circuit one on and waited a full minute to observe and read the wattage numbers: 67w @24vdc. I turned that circuit off and turned on circuit 2: 215w @24vdc. I turned that circuit off and turned on circuit 3: 208w @24vdc. I then turned on all three and observed a total of 490w (see photo).The panels are the same age. The four competitor panels delivered as promised. The pair of Renogy panels not only failed to deliver, they failed so poorly that I had to perform the test again, this time switching conductors from circuit 2. Same results.I checked the glass again. No chips, cracks or blemishes.All six panels are in a grid at the same angle and are hitting the sun. I did not have time to check the Renogy panels individually for raw output, however it’s seemingly apparent that one of the panels must be dead and acting as a resistor to the other in the circuit. 65w is a far cry from the 220w rating for these panels.And it’s only been a year.Take my review for what it is: One persons observation on how these panels are performing. You can make your choice and pay nearly twice as much for these ‘name brand’ panels or shop around for similar Bi-Facial panels that cost half the price, come in all-black aluminum framing, are bi-facial and most importantly, deliver on the output. In my opinion, these panels don’t make sense economically and they certainly don’t deliver on their output.I like other Renogy products as they are well made and perform good. It’s these panels that make me wince a bit.

Ordered two of these and the m4 connectors on one were not finished and had solid strip of plastic making it impossible to use the clips that make the m4 adapter functional.