Renogy Solar Panels 640 Watt N-Type 18BB, 25% High-Efficiency

I feel like I have enough experience with these panels now to write a review. I’m not going to be overly technical or anything because I don’t have that type of background or ability. I’m just going to tell you my experience and how they’ve worked. I’ve ordered these panels three times and I’m ordering another two now. My first order one of the panels was shattered. I contacted Amazon and they sent two more panels out and did not force me to send the other panels back. Meaning I got three panels that were working even when I’ve only ordered two at that point. I expanded the array by ordering more panels. And again expanded by ordering more yet again. One order was damaged out of three, not to mention the replacement that they sent which can be considered a delivery or order if you want so four deliveries with one panel damaged. In total, I have eight panels. I’ve had these set up 2 series 4 parallel, 3 series, 2 parallel, 6 series, and 4 series 2 parallel. All worked as expected and excellent. Right now I have 4 series 2 parallel, which is sitting at about 120 something volts as my new inverter requires 120 V before the MPPT makes use of PV. This is why I’m ordering two more so I can do five series 2 parallel and be well within range for my MPPT. That said eight panels is 2560 W, after inverter and light load of about 200 W I am getting about 1950 W into the batteries after load. I would say that pretty nice for the panels. When I get the two more panels, it’ll be 3200 W and based on my experience thus far I expect to get between 2400 and 2600 watts charging my batteries daily, slightly more actual wattage running inverter and light load. The connectors on the back of the panels are easy to work with and seem to be very well-made. All the seals and seems everywhere with the wires and the seal to the frame seem to be well done. I happen to be very lucky to have the extra panel that Amazon sent me when one was broken because of the wind storm that shattered a panel that was in the active array. So of 10 panels that I’ve had eight survived. One died in shipping, one died in the line of duty. I’m very happy with these panels. I wish they cost a little less, but they are reasonably priced. I get five stars because the shipping incident was taken care of and the panels have been performing very well in many different configurations. If I had to do it all over, I would have ordered all the panels in one shot instead of making multiple orders. However, it’s worked out and I am happy with the purchases panels have been working for about two years now.

Perfect size. Not too heavy and bulky for this 72 YO. But not so small to need so many. The biggest bang for the buck are panels way too big to be used on flexible ground mounts. These are perfect.

I purchased this for a van build. On the first trip, we spent 9 days off-grid. It worked awesome. Even on cloudy days we were receiving a great amount of charging power. I paired it with (3) 300Ah batteries running a 12V AC with inverter for appliances. It recharged the batteries well each day. We were never without full power when traveling due to a near full recharge daily - even with a few days of rain included.

I love these. I Have 3 sets installed on my 26 ft class A RV. For a total of 1,920 watts of solar on the roof which is enough to run my roof top Air conditioning on 2500 watt inverter for up to 3 hours on a sunny afternoon.

Work great ! Replaced 2 (out of 3 in the small array) Renogy 270w, 24vt polycrystalline panels destroyed in a 75+mph line squall, when the whole anchored mount came out of the ground and went airborne. (Let me interject at this point . . . the original installer of this system I ultimately inherited, was unbelievably ignorant surrounding most all aspects of his installation. My advice? If you contract a complete system solar installer, seriously do your DD and if possible, get recommendations and inspect his/her completed projects. I have had to add myriad protections, calibrate all components to match factory engineering specs and completely replaced the ground mount array supports. I have decades of experience to match my low voltage education and certifications/licensure(s), but most people having a system installed will hardly ever know what they're buying. The original owner found this guy on FB and just took for granted someone on FB would tell her the truth about his qualifications. He, of course, didn't ! ) Adding these 2x320w mono-crystalline panels, (24vt rated and having a near identical physical footprint to the damaged 270w panels) exceed what should be a combined output spec by around 10% (+/-) without stressing the original panel's tolerances. Needless to say, I'm quite happy with my purchase.

Put them on a truck camper and they seem to be working great. No complaints.

Arrived broken. You could hear the shattered glass sliding around in the box as the FedEx guy unloaded it. Also the shipping box was torn to hell. I refused delivery and FedEx took them back. Then for some reason re-delivered it to my house a few days later. The phone number to call customer service is deactivated, so online I initiated a return with Ronogy but they sent along a return label without postage. I had to pay $340 to send the panels back to them via FedEx. They refunded my sale price, but have yet to refund my shipping cost (that they should have covered in the first place as the panels were broken when delivered) Overall terrible company to work with. Do not buy from this company.

great product. could be packed better. Once panel broke during delivery. check you arrival(as on open completely and check)