The sun winch was a piece of junk so it got discontinued. Too many returns, says it could lift 50 pounds lol, maybe 5 pounds. Have used these winches, very reliable and easy raise and lower two Gavitas or two "8 air-cooled shades and ducting. The 2000lb rating is not for lifting, but will easily raise and lower a few hundred pounds. Used a car battery charger for the 12VDC power source.