This was used by me for a few years. The inverter works fine I upgraded my system to a larger setup. This has been indoors the whole time and not exposed to the weather. Has always worked great , no problems ever. Will work for solar arrays up to 4,600 watts. 2 solar panel string inputs with MPPT (multiple power point tracking) the increases panel yield up to 30 percent. The item “NEW SMA Sunny Boy 4000US With Disconnect 4000 Watt Grid Inverter Good condition” is in sale since Wednesday, March 13, 2019. This item is in the category “Home & Garden\Home Improvement\Electrical & Solar\Alternative & Solar Energy\Chargers & Inverters”. The seller is “cleeii” and is located in Homer, Georgia. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Uruguay.

• Brand: SMA
• Custom Bundle: No
• Non-Domestic Product: No
• Model: SB4000US
• Modified Item: No
• Type: Grid Tie Inverter
• Voltage: 240/208
• Country/Region of Manufacture: United States
• MPN: SB4000US