Outback Power Systems GS8048 manual Backup, Mini Grid

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Operation

Backup

This mode is intended for systems that have utility grid available as the primary AC source. This source will pass through the Radian inverter’s transfer circuit and will power the loads unless utility power is lost. If utility grid power is lost, then the Radian inverter will supply energy to the loads from the battery bank. When the utility power returns, it will be used to power the loads again.

CHARGING:

In this mode, when the charger is enabled, the Radian will use the AC source to charge the battery bank. (See page 20.) It will proceed through the entire battery charging cycle. After the end of the Float timer, it will continue to alternate between Silent and Re-Float stages.

BENEFITS:

In this mode, the inverter will offset the loads with excess renewable energy if it is available from the batteries. (See page 19 for more information on the Offset function.)

This mode will continuously maintain the batteries in a fully-charged state, unlike the Support mode, and does not have the overhead consumption of the UPS mode.

NOTES:

The Support and grid-interactive functions of the Radian inverter are unavailable in this mode.

Mini Grid

The Radian inverter can be programmed to automatically reject an AC source and run solely from battery (and renewable) energy. In Mini Grid mode, the inverter only connects to the AC source (usually the utility grid) when the batteries run too low.

In this mode, the Radian inverter runs on battery-supplied power for as long as the batteries can be sustained. It is expected that the batteries will also be charged from renewable sources such as PV. When the batteries become depleted, the system reconnects to the utility grid to operate the loads.

The inverter will reconnect to the utility grid if the battery voltage decreases to either the Re-Float Voltage set point (see page 22), or the Rebulk voltage (see page 23). Once it reconnects to the utility grid, if the charger is turned off, the Radian will use its transfer circuit to send grid power to the loads. If the charger is turned on, it will use the grid to charge the battery, as well as powering the loads.

While connected to the utility grid, any excess energy from the renewable source will be sent to the loads and used to “offset” the use of grid power. When the renewable energy is equal to or greater than the load demand, the utility grid will no longer be required. The Radian inverter will then disconnect from the utility grid and begin running from batteries again. It will not disconnect until these conditions are met.

CHARGING:

In this mode, the Radian inverter will wait for the batteries to pass through the charging stages until certain internal charger settings are met (see below). This is true regardless of whether the Radian or the renewable source is charging. This means that the regulator for the renewable source must be set to the same settings as the Radian (or higher). See the MATE3 Owner’s Manual to locate the exact settings of the Radian inverter.

If the reconnection was triggered by the Re-Float Voltage set point, the inverter will only require the batteries to pass through the Float Voltage and Float Time settings (as well as Offset.) The inverter

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Contents GS8048 Radian Series Inverter/ChargerTrademarks Terms and Definitions Symbols UsedAudience DefinitionsImportant Safety Instructions General SafetyTable of Contents Table of Contents List of TablesList of Figures Introduction MATE3 System Display and Controller Startup Pre-startup ProceduresCommissioning Functional TestCommissioning Powering DownFirmware Updates Adding New DevicesOperation Input ModesGenerator Operation SupportGrid Tied UPS Uninterruptible Power Supply Mini Grid BackupOperation Inverting FunctionsInput SearchAC Source Acceptance AC Current SettingsTransfer Offset Bulk Stage Battery ChargingCharging Steps No ChargingCharging Stages Over Time1 OffsetRepeated Silent Float TimerSilent Float StageAbsorption Timer New Charging CycleNew Absorption Stage Equalization Battery Temperature CompensationExamples OutBack HUB4 and MATE3 Multiple-Inverter Installations StackingExample of Parallel Stacking Arrangement Three Inverters Power Save Levels Auxiliary Terminals Operation Operation Grid Use Time High Battery TransferSystem Display-Based Functions Advanced Generator Start AGSTroubleshooting Basic TroubleshootingTroubleshooting Symptom Possible Cause Possible Remedy Troubleshooting TroubleshootingSymptom Possible Cause Possible Remedy Hot or neutral Not be bonded Inverter may be behaving correctly Inverter output is being fed Troubleshooting Error Troubleshooting Message Causes Possible Remedy Error MessagesAC Freq Too High Message Definition Possible RemedyCapacitors Voltage Maximum Disconnect MessagesSell Status Sell Status MessagesSell Status Definition Troubleshooting Mechanical Specifications for Model GS8048 SpecificationsSpecifications for Model GS8048 Electrical Specifications for Model GS8048 ValueEnvironmental Specifications for All Models Value Environmental SpecificationsRegulatory Specifications SpecificationsDefault Settings and Ranges GS8048 Inverter SettingsFirmware Revision Field Default Minimum Maximum Product Registration OutBack Power TechnologiesProduct Registration Extended WarrantyYear Limited Warranty for Radian Products WarrantyWarranty How to Arrange for Warranty ServiceTroubleshooting Return Material Authorization RMAReturning Product to OutBack Out of WarrantyThis page Intentionally Left Blank Index Year WarrantyInput Modes 11, 17, 20, 22 IndexThis page Intentionally Left Blank
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