Newpowa 9BB Cell Monocrystalline 12V 100W Solar Panel Compact Design High Efficiency Module for RV Marine Boat Off Grid

I bought 4 of these panels earlier than I needed for a camper I am building because of the black friday price that was too good to pass up. I set them up temporarily to test them and was very pleased to see on a full sun day the 4 panels peaked at 375 watts according to the charge controller I am using. What is important to understand is that I am in Minnesota and the shortest days of winter are happening right now. That is an impressive amount of power for winter sun here. I have been running them for 30 days now and they have performed great on what little sun we have gotten. I have had days of 100 watts from the 4 panels with overcast skies not a bit of blue sky in sight. They are connected to a bougerv 40 amp mppt controller and 2 100ah lifepo4 batteries. I have been using a pure 2000w sine wave power inverter to power tools building my camper. I don't know how long they will last, but time will tell. For the worst part of winter they have performed well. Can't wait for summer to see how well they do. For the small size, I expected less output, and maybe during summer they won't do any better due to the temp rise that will happen. I will be buying more as my project gets further to max out the roof area of this camper.Update, 9 February 2025. Have added 2 more panels as I had planned for a total of 600 watts for my RV project. February in Minnesota and my test setup of all 6 panels with winter sunshine has produced 539 watts. Today, I started breaking in 2 100ah Lifepo4 batteries that recommend 3 total charge discharge cycles. Started charging at 10:30 am at 0% charge and after 2 hours they are 50% charged. This time of year up here we only get about 4 hours of good charge time so panel performance is very important. I highly recommend these panels. The other thing I like about them is the small size compared to other 100 watt panels. It will be interesting to see how they perform once mounted on the RV as 2 will be on flat roof area and 4 at about 22 degrees. Fixed panels on an RV roof never see ideal angles to the sun so good performing panels are a must.

For this form factor and use case, these panels are a great price. They are (or seem) solidly made, work as they should, and I think are a good physical shape for many uses. I bought the 2x set and then bought another to create 2 strings in parallel. We have a very shaded property so I put one in an area that gets good coverage in the morning and the other in an area for the afternoon. Paired with a good MPPT solar charger and a battery you have a simple and effective system for off-grid applications for a range of projects. I use a simple lead acid battery setup (because I already had one lying around otherwise I would definitely purchase a small Lifepo4 battery for the same purpose) mostly as a buffer to imperfect weather conditions so I can charge up and run my electronics with any of the billions of products available for 12v systems (car/rv/boat) while the sun is shining and don't generally drain the battery at night (lead acid batteries are so fragile to use that significantly reducses their lifetime -- this is why I say buy a Lifepo4 battery [and make sure the MPPT charge controller you buy supports lifepo4 like a good victron model] if you don't already have one)Any negatives of these panels are just the inherent limitations and realities of solar power -- like not reaching maximum power, etc. There are situations where these panels wouldn't be the best choice -- like if you wanted something that had a USB port directly or different type of native connectors (like DC5521 instead of the MC4) but then you need to look into portable solar panels or pay attention to getting the right adapter for the MC4 cables. If you need a portable panel then you will pay more for the same power and they will be larger for the same wattage but if that's what you're after then I definitely recommend that instead. I have a 100w portable, foldable panel with USB A and C plus multiple DC outputs and I love it for what it does. Just figure out your use case and buy the right product for it.

A pretty good quality panel. Excellent value for the money.

I have purchased 1, 100 watt compact 5 buss bar, and 16 of the compact 9 BB and they all perform about the same. For the price, size, and weight they are great. As soon as it's light they start producing and during peak sunlight they'll occasionally make 80 watts. I haven't seen 100 watts like some people claim, but I can tell you if you multiply hours of peak sunlight (4 to 6 hours) times total rated wattage, you will have an accurate idea of what you will produce for the day. So my little 100 watt, 10 amp PWM controller system makes around 600 watts per day in the summer and my 16 panel system makes around 9600 watts/day in the summer. I have ran 7, 100 watt panels in series for around 105 volts at 5 amps, but as soon as I added an eighth, the voltage went up to over 150 volts, so I could not run it on my Bluetti AC 200 max. I currently am running 2 strings of 6 on my 900 watt input and 2 strings of 2 on my 500 watt input without any problems.Update: I don't know why I'm listed as a Vine Voice on this - I have not received anything free. I am up to 28 of the 9 BB 100 watt panels, and still love them. Going larger would have been cheaper, but I don't like to wrestle with things and these panels work. I have received broken panels, and panels without the diodes connected, and the company immediately sent replacement panels. I have 3 small systems and will eventually have something much larger. These are affordable and light, and the delivery is free, so if you are like me and wanted to slowly learn and build, they are great.