California customers: this unit is not Rule 21 compliant and does not include a rapid disconnect device, making it unfit for new installations that need to get inspected. They are fine for replacements and upgrades that do not require a permit or PTO. Brand new old stock 4KW solar gridtie inverter WITH ARC PROTECTION SOMETHING THE REGULAR 4000US SERIES DO NOT HAVE!! The -12 model was replaced by a newer version (the -22 and now the -40) and that is why we can sell these at a deep discount. The item “SMA Sunny Boy 4000w Grid-tie Inverter SB4000US-12 + AFCI warranty&DC Disconect” is in sale since Wednesday, January 03, 2018. This item is in the category “Home & Garden\Home Improvement\Electrical & Solar\Alternative & Solar Energy\Chargers & Inverters”. The seller is “solar_equipment_traders” and is located in Agoura Hills, California. This item can be shipped to United States.

• Brand: SMA
• Model: SB4000US-12 AFCI
• MPN: SB4000US-12
• Country/Region of Manufacture: Germany