Xantrex Technology 815-3524, 815-2524-02 manual Neutral Wiring for Stacked Inverters, Fire Hazard

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Stacking Features

Neutral Wiring for Stacked Inverters

Due to the neutral ground switching design of the Freedom SW Inverter/charger, it is mandatory that the AC INPUT and AC OUTPUT Neutrals be isolated from one another. In a stacked pair configuration, connect the two AC input neutrals together at the main distribution panel and the two AC output neutrals at an isolated neutral location in the inverter AC distribution panel.

FIRE HAZARD

Do not power several loads in excess of 30 amps even in parallel-stacked configuration.

Failure to follow these instructions can result in death or serious injury.

IMPORTANT: In a parallel-stacked configuration, during operation, the AC transfer (pass-through) relay rating remains the same at 30 amps. The AC transfer relay rating does not double to become 60 amps.

NEUTRAL

L

GROUND

Two Freedom SW 3524-230 units shown.

NEUTRAL

30A

30A

GROUND

Figure 18 Neutral Wiring for Stacking
44	Freedom SW 230V Installation Guide

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Contents Freedom SW Sine Wave Inverter/Chargers Page This guide for use by qualified About This Guide PurposeElectrical Shock and Fire Hazard Important Safety InstructionsElectrical Shock Hazard Fire and Burn Hazard Explosion HazardPrecautions When Working With Batteries Exposure to Chemicals and Gases Hazard Risk of Damage to the INVERTER/CHARGERRegulatory Limitations on USEPage Contents Page This guide for use by qualified installers only Page Introduction Materials List Freedom SW 230V Installation Guide Materials ListInstallation Codes Installation InformationBefore You Begin the Installation Electrical Shock and Fire HazardsAbout the Xanbus System Xanbus SystemXanbus-enabled Products and Accessories About the Xanbus SystemSize and Length of DC Cables Planning the InstallationTwo Key Performance Factors Mounting Location of the Freedom SWPlanning Preparations AC, DC, and Network ComponentsPlanning Preparations Planning Preparations AC Disconnect and Over-Current Protection Device AC ComponentsAC Input AC OutputAC Wiring Distribution PanelsModels Freedom SWDC Cabling DC ComponentsBatteries Fire HazardDC Grounding DC Disconnects and Over-Current DevicesMarine Applications1 Heavy Item To unpack and inspectTools Installation Tools and MaterialsMaterials Installing the Inverter/Charger OverviewFire and Explosion Hazard Choosing a Location for the Inverter/ChargerHeat Hazard Safe Considerations Mounting the Inverter/ChargerTo mount the inverter/charger Approved Mounting Orientation Orientation? Comment Orientation Approved Mounting Orientation? Comment This guide for use by qualified General AC Wiring Considerations Connecting the AC Input and AC Output WiresFIRE, Electrical SHOCK, and Energy Hazards Connecting AC Input Wires Correct Batter Polarity will Cause Damage toInstalling the Inverter/Charger To make the AC output wiring connections Connecting the AC Output WiresEquipment Damage Recommended Cable Sizes and Lengths and Fuse Size Connecting the DC CablesDC Connection Precautions Preparing the CablesGuidelines for Routing the DC Cables Equipment Damage DUE to Reverse Polarity Connecting the DC Cables to the Inverter/ChargerTo connect the DC cables DC Cable Connections To connect the chassis ground Connecting the Battery Temperature Sensor BTS Mounting OptionsMounting to the Negative Battery Terminal To mount the sensor on the negative battery terminalBTS port Mounting to the Side of the Battery Case To mount the sensor on the battery caseConnecting to the Network To connect the Freedom SW 230V to the Xanbus networkPerforming Checks Prior to Initial Start-Up Testing Your Installation Testing in Invert ModeInstallation Complete Testing in Charge Mode and AC Bypass ModeTo verify that the Freedom SW 230V starts charging Stacking Features Parallel Stacking DC Connections for Stacked Inverters Connect the stacked system as followsNeutral Wiring for Stacked Inverters Configuring System for Stacked Operation To configure the system for stackingDisabling Search Mode on the Master Unit Search Mode Operation in Parallel StackingWiring Schematic Setting Search Mode on the Slave UnitCharger Settings in a Dual Freedom SW Configuration CalculationsTo set the Max Chg Rate % setting in each Freedom SW ExamplesTo set the Max Chg Rate % setting in each Freedom SW To set the Max Chg Rate % setting in each Freedom SW Inverter/Charger Physical Specifications Freedom SW Physical SpecificationsBattery Information Battery Bank SizingBattery AMP-HOURS Used = AC WATT-HOURS÷10 Estimating Battery RequirementsCalculating Battery Size Watts = Volts × AmpsDaily watt-hours needed Battery Bank Sizing Worksheet Battery BanksRestrictions on Motor Size Battery Information Battery Sizing Worksheet Battery Cabling and Hook-up Configurations Battery Series ConnectionBattery Series-Parallel Connections Specifications Environmental SpecificationsInverter Specifications Charger Specifications Transfer and General Specifications To install the drip shield Inverter Drip Shield InstallationShock Hazard Drip Shield Placement Desktop Mount 20 mm No clearance required here Page Page Schneider Electric Solar Inverters USA Inc