Outback-power-systems GS4048A Operators Manual Instrukcja Użytkownika Pobierz pdf (Strona 20)

Operation

18 900-0161-01-00 Rev A

Mini Grid

mode, the Radian inverter automatically rejects an AC source and runs solely from battery

(and renewable) energy. The inverter only connects to the AC source (usually the utility grid) when

the batteries run too low.

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 the

Connect to Grid

set point and remains there for the

Delay

time period. These items are shown in Table 16 on page 65.

While connected to the utility grid, the inverter’s charger can be set either on or off. If the charger is

turned on, the inverter will proceed through a full charging cycle. Upon reaching float stage, the

inverter will disconnect from the grid.

If the inverter is connected to the utility grid and the charger is turned off, another DC source such as

renewable energy should be present to charge the batteries. The inverter will observe the batteries as

if it was performing the charge. When the batteries reach the required voltages and charging times to

achieve float stage, the inverter will disconnect from the grid. This means that the regulator for the

renewable source must be set to the same settings as the Radian (or higher). Check the settings of

both devices as needed.

See page 27 for more information on the battery charging cycle.

BENEFITS



Mini Grid

mode allows a system to minimize or eliminate dependence on the utility grid. This is only

possible if certain conditions are met. See below.

NOTES

 The Radian inverter will offset the loads with excess renewable energy if it is available from the batteries.

See page 35 for more information on Offset operation. However, the Offset function is inapplicable when

the Radian disconnects from an AC source. The renewable energy supports the inverting function instead.



This mode has similar priorities to the high-battery transfer (

HBX

) function used by the MATE3 system

display. However, it is not compatible with

HBX

and cannot be used at the same time. When using

Mini

Grid

mode, the system display should disable

HBX

to prevent conflicts.

Mini Grid

mode is also incompatible with the

Grid Use Time

and

Load Grid Transfer

functions of the MATE3

system display. These functions do not have similar priorities to

Mini Grid

HBX

, but they do control the

inverter’s connection and disconnection with the grid.

Mini Grid

should not be used with these functions.



When deciding whether to use

Mini Grid

mode or

HBX

, the user should consider the aspects of each.

∼ Mini Grid logic is based in the Radian inverter and can function in the absence of the MATE3. HBX logic

is based in the MATE3 and cannot function unless the MATE3 is installed and operating.

∼ Mini Grid can use utility grid power to fully recharge the batteries every time it reconnects to the

grid. HBX can only do so under specific circumstances.

∼ HBX set points have a wide range of settings. Mini Grid uses settings intended to protect the batteries

from excessive discharge; however, most of its settings are automatic and do not allow customization.

∼ HBX works more efficiently with a larger renewable source, but there is no specification for renewable

size. Mini Grid

cannot work properly unless the source is larger than the size of the loads. If this

condition is not met, Mini Grid will not disconnect the inverter from the utility grid.

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