Have not had a chance to evaluate the long term effectiveness of this unit. It was a advertised for setup and ease of use. I have hooked it up to charge my trolling motor battery in my outdoor storage area which has no ac power. I have no idea how long it will take.
Merchant Response:Thank you very much for your review! We are so glad to hear that you have found this 18 Watt Solar Battery Charger Kit with 8 Amp Charge Controller easy to set up and use. While in direct sunlight, this 12V solar battery charger will supply approximately 1 amp of power per hour to your battery. Thanks again - Your patronage is greatly appreciated!