Great addition to my echo batteries.

Bought this to replace a custom-built solar panel that the boys busted. It performs as well as a poly-crystaline panel a third larger; I was very impressed. Open circuit voltage was around 20v, and the current provided is more than enough to keep my deep cycle topped off to run my rain barrel pump, chicken coop lighting, and a little fountain pump. It's amazing how cheap these are getting. I used to build my own panels to save money, but the price is getting down to my costs for building a similar wattage panel.

I am so disappointed because I had such high hopes as I reviewed thousands of products and reviews on these products and yours seem to be the best so I had very high hopes as I was stuck living in a small camper with no power and I'm physically disabled. I used your math chart and it should have been enough for me to plug my camper into it for at least a day and a half for more because I was only using it for occasional heat which is propane and it only takes a little bit of battery and one overhead light and keep my phone in portable chargers for the phone charge. As soon as I plug my camper into it even with full charge and nothing on in the camper it was only telling me I had 0.4 hours of power! I tried to return it immediately and the company told me that I had to pay to ship it back to them and it would have cost me $125 minimum to do that, which obviously I couldn't afford seeing as I was on a house physically disabled and obviously didn't have the money to do that. I literally did it go fund me to get the money to purchase this, I worked hard and lots of amazing generous people thought that they were making a huge difference inimproving my living conditions while I waited for housing, and I feel bad like I let them down because I chose the wrong product. Do not buy from this company!

I lost power for only 4 days after she blew through. I bought 2 of these, some spare batteries, a connector and a couple of base stations. With 2 panels connected in parallel I reckon I can get around 20ah's of power saved on a bright sunny day (late Oct timeframe). Enough for a hot shower and pot of coffee the next day. You know, the important things...

I purchased this so when my house power went out it would switch over to the inverter power for my sump pump….. and it does but when the house power comes back on it doesn’t know to switch back so it switches back and forth very quickly and fried my inverter within 5 seconds I didn’t even have enough time to get to the breaker box to switch it back off….. I would not recommend and the worst part is I can’t even return it because it’s been over 34 days Live and learn hopefully this helps someone else

The clamps should work well and would have rated higher but after assembling all the clamps I was short 3 set / flat head screws