Jan 2015:
It's keeping my generator battery charged with a 5w Sunforce solar panel.  I probably could have not used the charge controller on a 5w panel but it seemed like cheap insurance.  Beware as previous people have stated, I had to splice connectors to make the Sunforce panel and charge controller connect.  For me, I had read the comments and anticipated this.  I plan to buy more for my tractor, truck, shed....

Jan 2016:
Dropping to 1 star.  The unit is dead.  I'm not sure exactly when it died but I was running a generator exercise the other day and noticed it's no longer charging the battery.  Granted it was cheap enough but I do have an expectation of not having to replace it yearly.

Jul 2016:
I removed this charge controller and hooked up the 5w solar panel directly to the battery.  It shouldn't be enough to over charge the battery but I was afraid the failure in the charge controller would discharge / drain the battery
Jan 2015:
It's keeping my generator battery charged with a 5w Sunforce solar panel. I probably could have not used the charge controller on a 5w panel but it seemed like cheap insurance. Beware as previous people have stated, I had to splice connectors to make the Sunforce panel and charge controller connect. For me, I had read the comments and anticipated this. I plan to buy more for my tractor, truck, shed.... Jan 2016:
Dropping to 1 star. The unit is dead. I'm not sure exactly when it died but I was running a generator exercise the other day and noticed it's no longer charging the battery. Granted it was cheap enough but I do have an expectation of not having to replace it yearly. Jul 2016:
I removed this charge controller and hooked up the 5w solar panel directly to the battery. It shouldn't be enough to over charge the battery but I was afraid the failure in the charge controller would discharge / drain the battery