This Voltage Calculator is designed to give the approximate voltage rise in the AC circuit between the Main AC Service panel and the inverter. SMA America, Inc., makes no claim as to the performance of your system, including, but not limited to, actual efficiency or power production of the inverter based on the information from this Program. You must agree to this policy in order to use the Voltage Drop Calculator in whole or in part. Parameters that are considered include the type of circuit, gauge of wire, amperage, length of circuit, and type of conductor. Please enter the required data, and then press the Calculate button. The results are returned as the estimated drop in voltage, percentage drop, and the approximate voltage that will be seen at the terminals of the inverter if the utility is at the high end of ANSI-A range, at nominal, and at the low end of ANSI-A range (nominal +5%, nominal, nominal -5%).

Required Data Select Material:    Copper Aluminum     Select Wire Size:    18 AWG 16 AWG 14 AWG 12 AWG 10 AWG 8 AWG 6 AWG 4 AWG 3 AWG 2 AWG 1 AWG 1/0 AWG 2/0 AWG 3/0 AWG 4/0 AWG 250 Kcmil 300 Kcmil 350 Kcmil 400 Kcmil 500 Kcmil 600 Kcmil 700 Kcmil 750 Kcmil 800 Kcmil 900 Kcmil 1000 Kcmil 1250 Kcmil 1500 Kcmil 1750 Kcmil 2000 Kcmil   Select Voltage and Phase:   120 Volts 1-Phase 240 Volts 1-Phase 208 Volts 3-Phase 3-Wire 120/208 Volts 3-phase 4-Wire 277 Volts 1-Phase 480 Volts 3-Phase 3-Wire 277/480 Volts 3-Phase 4-Wire   Enter distance between Sunny Boy Inverter and Main Service panel:   Feet   Enter Current Load:   Amps       Calculated Results       Estimated Voltage Drop:   Volts Estimated Percent Drop:   Percent Estimated Voltage with nominal +5%:   Volts Estimated Voltage with nominal:   Volts Estimated Voltage with nominal -5%:   Volts

IMPORTANT: SMA America, Inc., recommends a maximum of 1% to 1.5% voltage drop from the Main Service panel to the inverter. This calculator, like the String Sizing Program, is intended to provide an estimate of system performance, and should not be used to guarantee or imply any guarantee about system performance. The code that forms the basis of this Calculator was used with permission from the Computer Support Network.