Rated 3.0 out of 5 by 5
Rated 5.0 out of 5.0 by SolarMagic Quality panels at an excellent price.
I went directly to Grape Solar's website for more detailed product information. Once I was ready, ordering via Home Depot was quick and easy. The panels were delivered within 10 days of my order and were shipped on an oversize wood pallet with a wood frame around the sides and top in addition to heavy cardboard all around. The panels themselves were held securely together but slightly separated by plastic inserts on all corners. The delivery company was efficient and careful with no damage what-so-ever.
These are high quality panels with surprisingly heavy aluminum frames pre-drilled for mounting brackets and grounding straps. The MC4 male and female connectors on each panel were high quality, an area where many panels manufacturers skimp.
I elected to use the Grape Solar mounting racks and hardware that were designed to work with these panels and found them to also be of very high quality. In addition, since I wanted to mount the racks so as to be able to change the angle for higher efficiency in the winter, I called Grape Solar directly and explained the problem. They asked some basic questions about what I had already purchased and the current angle of my roof, then designed the tilt leg package best suited for my needs and transmitted the info to my local Home Depot. HD called me the next day with the pricing. I ordered over the phone and the package was delivered within 10 days. Same high quality pieces as the original racking system. I even got back to Grape Solar with some additional questions and a request for more info and received everything I needed within a few hours via email.
Once I had the entire system installed and the panels mounted at an angle close to optimum I was very surprised to find I was getting over 950 watts from these panels in late December, the shortest daylight of the year with the weakest sun at the lowest angle to the horizon. Considering the power I was getting under the worst conditions (listed full power is 1,060 watts under ideal conditions) I fully expect to get the full rated power or more during the summer.
I can't tell you how pleased I am with Grape Solar for their quality customer service and their patience with several requests for more info either via phone or email. They always responded quickly and with everything I needed. Home Depot also did a great job, particularly with the tilt leg special order. The local store even followed up with a phone call a few days after delivery to make sure all was well.
I have seen bad or even middle of the road solar panels and these are not them. These Grape Solar panels have exceeded all my expectations and then some. Bravo Grape Solar and Home Depot. I will be back in a few months for another order. Thank you.
February 10, 2015
Rated 4.0 out of 5.0 by WattDoc Overall a good product for the price
Nichola does not know what they are talking about. If he/she had actually read the specs would know Vmp =31.2 volts, Imp = 8.5 amps and Pmax = 265 watts. 31.2 volts x 8.5 amps = 265 watts. Keep in mind that is the STC rating which is a lab rating the user will never experience.
Read a little further and like all good manufactures will list the panels PTC rating which is th ereal world application and what the user should expect and base all calculations on. PTC = 236 watts and efficiency = 19% which are honest real numbers.
I use these panel on my ham radio shack and very pleased. I am also a professional electrical engineer and use these panels. They are not top of the line by any means, but they are good panels. good warranty, good value, and will serve there intended function just fine.
October 24, 2014
Rated 2.0 out of 5.0 by testersal15 Inferior quality
The panels arrived on wood grate packaging, the top wood boards were loose, what explains the scratching on the glass of the top panel. The output wattage of the four panels, when connected to load, is less than 700 watts, I wonder whether the scratching on one panel is to blame. The surface of the panel is not as flat as that of similar size panels from other brands.
February 4, 2015
Rated 3.0 out of 5.0 by Nickname These really are 265 watt panels. Vmpp and Impp are listed, not Voc and Isc.
The other review stating that the power has been calculated incorrectly is wrong. The Vmpp and Impp are listed and are 31.2V and 8.5A, so the power at that point on the VI curve really is 265 watts.
It looks like the reviewer assumed the voltage and current given were Voc and Isc.
October 24, 2014
Rated 1.0 out of 5.0 by nichola Power output rating is wrong
The power rating for these panels are completely bogus they would have to be 41% EFFICIENT IN ORDER TO DELIVER WHAT THEY CAN DELIVER. They used the short circuit current multiplied by the open circuit voltage to rate the panels which is completely wrong.
October 20, 2014